Does Every Chemical Have a formula?

Answers

Answer 1
Yes, each chemical substance has their own chemical composition so a formula is used to show this.
Answer 2

Yes.

Each chemical substance has a specific chemical composition, so these chemical substances have their own chemical formula.

I hope this helps!


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Write the symbol for every chemical element that has atomic number less than 14 and atomic mass greater than 23.2 u.

Answers

Answer:

8 oxygen. 9 flourine. 10. Neon. 5 Boron

Please helpplease please..help

Answers

Answer:

vague symptoms are characteristic of an acute toxin, because of the of the lack of well defined consistency that these symptoms have in relation to the course of the disease progress.

A 250 mL sample of gas at 1.00 atm and has the temperature increased to and the volume increased to 500 mL. What is the new pressure

Answers

Answer:

0.53atm = P2

Explanation:

Gas at 1.00atm and 20°C. Temperature increased to 40°C...

We can solve this question using combined gas law:

P1*V1 / T1 = P2*V2 / T2

Where P is pressure, V volume and T absolute temperature of 1, initial state and 2, final state.

Compunting the values of the problem:

P1 = 1.00atm

V1 = 250mL

T1 = 20°C + 273.15 = 293.15K

P2 = ?

V2 = 500mL

T2 = 40°C + 273.15 = 313.15K

1.00atm*250mL / 293.15K = P2*500mL / 313.15K

0.53atm = P2

What is the difference between conjugate acid-base pair?

a. a H atom. c. a mole water
b. a H+ ion d. a OH– ion​

Answers

Answer:

b. a H+ ion

Explanation:

The concept of conjugate acid-base pair is related to Bronsted-Lowry acid-base theory and according to this theory, acid is a proton acceptor.

In short,

conjugate base is formed when an acid donates a proton.

conjugate acid is formed when a base accepts a proton.

1.Using the absorbance of the spinach extract and the equation of the trendline, determine the concentration of the extract solution. Report the concentration in moles/L (M).
2. Calculate the number of rams of chlorophyll-a in the 25ml, spinach solution.
3. Calculate the concentration of the chloropyhll-a soultion in spinach (mg chlorophyll-a/g spinach)
Trendline: y=1609x + .0055
Absorbance spinach extract lamda max: .329
Absorbacne spinach extract, 750 nm: .023
Corrected absorbance: .306
Mass of Spinach: .1876g Total Volume of spinach: 25mL

Answers

Answer:

Explanation:

From the given information:

We are to make use of the spinach absorbance extract which is the corrected absorbance  (y) = 0.306

And also the trendline equation:

y = 1609x + 0.0055

where,

x = absorbance of the spinach extract.

0.306 = 1609x + 0.0055

collecting the like terms

0.306 - 0.0055 = 1609x

0.3005  = 1609x

x = 0.3005/1609

x = 1.8676 × 10⁻⁴

x ≅ 0.0002 M

No. of grams for the chlorophyll can be computed as follows:

recall that:

molar mass of chlorophyll = 893.5 g/mol

the volume = 25ml = (25/1000) L = 0.025 L

In spinach solution, the no. of grams for the chlorophyll:

= (0.0002) mol/L × (893.5 g/mol) × (0.025) L

= 0.0044675 g

≅ 0.0045 g

In the spinach, the concentration of chlorophyll = no of grams of chlorophyll/ mass of the spinach

= 4.5 mg/0.1876 g

= 23.987 mg/g

≅ 24 mg/g

From the given information:

We are to make use of the spinach absorbance extract which is the corrected absorbance  (y) = 0.306

Chlorophyll

Chlorophyll is any member of the class of the green pigments involved in the photosynthesis process.

And also the trendline equation:

y = 1609x + 0.0055

where,

x = absorbance of the spinach extract.

so 0.306 = 1609x + 0.0055

collecting the like terms

0.306 - 0.0055 = 1609x

0.3005  = 1609x

x = 0.3005/1609

x = 1.8676 × 10⁻⁴

x ≅ 0.0002 M

2. No.of grams for the chlorophyll can be computed as follows:

recall that:

molar mass of chlorophyll = 893.5 g/mol

The volume = 25ml = (25/1000) L = 0.025 L

Therefore:

In spinach solution, the no. of grams for the chlorophyll:

= (0.0002) mol/L × (893.5 g/mol) × (0.025) L

= 0.0044675 g

≅ 0.0045 g

3. In the spinach, the concentration of chlorophyll = no of grams of chlorophyll/ mass of the spinach

= 4.5 mg/0.1876 g

= 23.987 mg/g

≅ 24 mg/g

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Which probing question lies within the scope of physics?
O A.
Are fish in the open ocean
attracted by underwater sounds?
O B.
Does increasing the saltiness of
ocean water affect the speed
of sound in the water?
O C.
What effect does the release of industrial wastewater have on
the acidity of oceans?
D. What is the effect of rising sea temperatures on
ocean currents?

Answers

Answer:

answer number C is the correct answer for this

in a breaker of water ,the water -water bonds can properly be called​

Answers

Answer:

LICK

Explanation:

How many molecules are present in 1296 g of dinitrogen pentoxide (N2O5)

Answers

Answer:

The molar mass of N2O5 is 108 g/mol. 1296g of N2O5 has 1296 / 108 = 12 moles. 1 mole contains 6.022 x 10^23 molecules

i.What are organic fertilizers?


ii.State three advantages of organic fertilizers over inorganic fertilizers.​

Answers

Answer:

Organic fertilizers are those fertilizers that are not artificially produced but are natural and has carbon in them.

Fertilizers in the broad term are used to provide nutrient to the soil and boost growth of crops.

Some of the advantages of organic fertilizers to inorganic fertilizers are:

They do not make crusts on the soil, unlike inorganic fertilizers.

They help add structure to the soil because of the good water movement into the soil

They are easier on the soil because they feed good microbes.

What is the molarity of a solution if 325ml of the solution contains 46.8 grams of NaHCO3?

Answers

Answer:

1.714 M

Explanation:

We'll begin by calculating the number of mole in 46.8 g of NaHCO₃. This can be obtained as follow:

Mass of NaHCO₃ = 46.8 g

Molar mass of NaHCO₃ = 23 + 1 + 12 + (3×16)

= 23 + 1 + 12 + 48

= 84 g/mol

Mole of NaHCO₃ =?

Mole = mass / molar mass

Mole of NaHCO₃ = 46.8 / 84

Mole of NaHCO₃ = 0.557 mole

Next, we shall convert 325 mL to L. This can be obtained as follow:

1000 mL = 1 L

Therefore,

325 mL = 325 mL × 1 L / 1000 mL

325 mL = 0.325 L

Thus, 325 mL is equivalent to 0.325 L.

Finally, we shall determine the molarity of the solution. This can be obtained as shown below:

Mole of NaHCO₃ = 0.557 mole

Volume = 0.325 L

Molarity =?

Molarity = mole / Volume

Molarity = 0.557 / 0.325

Molarity = 1.714 M

Therefore the molarity of the solution is 1.714 M

When a photon of red light hits metal X, an electron is ejected. Will an electron be ejected if a photon of yellow light hits metal X?
A. Yes
B. No
C. Can't tell

Answers

no i do not believe so because of the different wave lengths that are immersed from the colour spectrum

Post-Lab Questions
1. A beverage company is having trouble with the production of the dye in their drinks. The color of their drink mix is supposed to be a pale green color, but they often get different results. For each unwanted result, choose the most plausible explanation to help the company improve the formula.
(1pts)
The color of the drink is too pale after adding the dye to the drink because
Choose...too much dye was added to the drink.the water in the drink is evaporating.not enough dye was added to the drink.the wrong dye was added to the drink.
(1pts)
The color of the dye is appearing as red, instead of green because
Choose...too much dye was added to the drink.the water in the drink is evaporating.not enough dye was added to the drink.the wrong dye was added to the drink.
(1pts)
The drink started out the correct color but it is getting darker over time, even though nothing has been added to the drink, because
Choose...too much dye was added to the drink.the water in the drink is evaporating.not enough dye was added to the drink.the wrong dye was added to the drink.
(1pts)
2. Beer's Law states that A=εbc, where A is the absorbance, ε is the molar absorptivity of the solute, b is the path length, and c is the concentration. Identify the experimental evidence from the activity that you have for the dependence of absorbance on each variable.
The evidence for the dependence of absorbance on the variable ε is
increasing the cuvette width increases the absorbance.
changing the compound changes the absorbance behavior.
adding more water decreases the absorbance.
Choose...ABC
(1pts)
The evidence for the dependence of absorbance on the variable b is
increasing the cuvette width increases the absorbance.
changing the compound changes the absorbance behavior.
adding more water decreases the absorbance.
Choose...ABC
(1pts)
The evidence for the dependence of absorbance on the variable c is
increasing the cuvette width increases the absorbance.
changing the compound changes the absorbance behavior.
adding more water decreases the absorbance.
Choose...ABC
(1pts)
3. Describe how you could use the Beer's Law simulation to experimentally determine the best wavelength at which to perform an experiment.
Measure the absorbance for solutions of multiple different solutes and find the minimum absorbance.
Measure the absorbance for solutions with different concentrations and find the slope of the trendline.
Measure the absorbance for the same solution at different wavelengths and find the maximum absorbance.
Measure the absorbance for the same solution in different cuvette sizes and find the y-intercept.

Answers

Answer:

1. not enough dye was added to the drink.

The wrong dye was added to the drink

the water in the drink is evaporating

2. Changing the compound changes the absorbance behavior.

3. Measure the absorbance for the same solution in different cuvette sizes and find the y-intercept.

Explanation:

When the beverage company adds dye to the drink, there should be standard quantity added to the drink so that the color of the drink remains constant. When too much dye is added to the drink, the color will get dark brown or black. When the color of drink get lighter than green this means dye is not added in required quantity.

Question 1 Points 3 23 and Louis immerses his left hand in a beaker containing cold water and immerses his right hand in a beaker containing warm water. Then, he immerses both his hands on a beaker containing water at room temperature. Which of the following statements are true? 1. The hand that was in hot water would feel cold. 2. The hand that was in cold water would feel hot. 3. His two hands will feel the same hotness. Que O2 and 3 0 1 and 2 o 1 and 3 1.2, and 3​

Answers

Answer:look down below

Explanation:

The statements that are true about hands that are immersed in the water are:

1. The hand that was in hot water would feel cold.

2. The hand that was in cold water would feel hot.

The correct option is B 1. and 2.

What is temperature?

Temperature is the measurement of the hotness or coldness of any object. It is measured in Celsius or kelvin. Our body has nerves that feel the different temperatures of any object. The high temperature is called hot and the low temperature is called cold.

When Louis put his hand in the warm water and one hand in the cold water. He feels the temperature of both glasses of water. Then he put both hands in the normal water.

So the hand that is warm would feel the water as cold and the hand with cold water would feel the water as hot.

Thus, the correct option is B. 1. and 2.

Learn more about temperature, here:

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Draw the major product that is obtained when (2S,3S)-2-Bromo-3-phenylbutane is treated with sodium ethoxide.

Answers

Answer:

Explanation:

The mechanism of the reaction is shown in the diagram below. From the reaction, when (2S,3S)-2-Bromo-3-phenylbutane undergoes a reaction with sodium ethoxide (ETONa), the E2 elimination reaction is put into place. Here, the H and the leaving group are antiperiplanar to one another and the reaction mechanism proceeds to form an isomeric (E)-2-phenyl-2butane as the major product.

If 2.18 g of sodium peroxide (Na2O2) react with water to produce sodium hydroxide abs oxygen, how many liters of oxygen will be produced at 17.7 Celsius abs 726 torr?

Answers

Answer:

0.350 L

Explanation:

2Na₂O₂ + 2H₂O → 4NaOH + O₂

First we convert 2.18 g of Na₂O₂ into moles, using its molar mass:

2.18 g ÷ 78 g/mol = 0.0279 mol Na₂O₂

Then we convert 0.0279 moles of Na₂O₂ into moles of O₂, using the stoichiometric coefficients of the reaction:

0.0279 mol Na₂O₂ * [tex]\frac{1molO_2}{2molNa_2O_2}[/tex] = 0.0140 mol O₂

Finally we use the PV=nRT formula to calculate the volume of oxygen produced:

P = 726 torrV = ?n = 0.0140 molR = 62.36 torr·L·mol⁻¹·K⁻¹T = 17.7 °C ⇒ 17.7 + 273.2 = 290.9 K

Inputting the data:

726 torr * V = 0.0140 mol * 62.36 torr·L·mol⁻¹·K⁻¹ * 290.9 KV = 0.350 L

An object was measured by a worker as 14.6cm long, however, the manufacturer specifications list the length of the object at 14.4cm. What is the percent error in the worker's measurement? A. 1.39%
B. 1.37%​

Answers

it's 0.2cm different from the expected value, wich was 14.6cm

how many percent that are is calculated in the screenshot.

rounded it's 1.37%

How many atoms are in 5.70 x 10^32 mol of Rn?

Answers

To find amount of atoms from mol, multiply the mole amount by Avogadro’s number

5.70x10^32 x 6.02x10^23

= 3.43x10^56 atoms

There are 3.43 × [tex]10^{56}[/tex] atom will be present in 5.70 x [tex]10^{32}[/tex] mol of Rn.

What is atom?

The basic number of matter that may be broken even without producing electrically charged molecules is the atom.

Calculation of atom:

It is given that number of mol = 5.70 x [tex]10^{32}[/tex] mol.

Then, the number of atom = 5.70 x [tex]10^{32}[/tex] mol × 6.02 × [tex]10^{23}[/tex].= 3.43 × [tex]10^{56}[/tex] atom.

Therefore, there are 3.43 × [tex]10^{56}[/tex] atom will be present in 5.70 x [tex]10^{32}[/tex] mol of Rn.

To know more about atom.

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The Li2+ ion is very similar to the hydrogen atom, in that it has one electron and energy levels similar
to the hydrogen atom. However, the relation = − (
1

2 −
1

2) cannot be used for this ion but
rather the relation = −2+ (
1

2 −
1

2) where the constant 2+=1.96x10-17J.
Use this relation to determine the third ionization energy, which is energy required to remove the last
electron from a Li2+ ion in kJ/mol, if the ion starts off in the ground state (Li2+ → Li3+
+ e-
).

Answers

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༒How much does the earth weigh?☆☆☆☆☆☆☆☆☆☆☆☆​

Answers

Answer:

Earth has a mass of 5.9736×1024 kg

5.972×10²⁴kg

hope it is helpful to you

A compound that contains only carbon, hydrogen, and oxygen is 58.8% C and 9.87% H by mass. What is the empirical formula of this substance

Answers

Answer: The empirical formula of the compound becomes [tex]C_5H_{10}O_2[/tex]

Explanation:

The empirical formula is the chemical formula of the simplest ratio of the number of atoms of each element present in a compound.

Let the mass of the compound be 100 g

Given values:

% of C = 58.8%

% of H = 9.87%

% of O = [100 - 58.8 - 9.87] = 31.33%

Mass of C = 58.8 g

Mass of H = 9.87 g

Mass of O = 31.33 g

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)

To formulate the empirical formula, we need to follow some steps:

Step 1: Converting the given masses into moles.

Molar mass of C = 12 g/mol

Molar mass of H = 1 g/mol

Molar mass of O = 16 g/mol

Putting values in equation 1, we get:

[tex]\text{Moles of C}=\frac{58.8g}{12g/mol}=4.9 mol[/tex]

[tex]\text{Moles of H}=\frac{9.87g}{1g/mol}=9.87 mol[/tex]

[tex]\text{Moles of O}=\frac{31.33g}{16g/mol}=1.96mol[/tex]

Step 2: Calculating the mole ratio of the given elements.

Calculating the mole fraction of each element by dividing the calculated moles by the least calculated number of moles that is 1.96 moles

[tex]\text{Mole fraction of C}=\frac{4.9}{1.96}=2.5[/tex]

[tex]\text{Mole fraction of H}=\frac{9.87}{1.96}=5.03\approx 5[/tex]

[tex]\text{Mole fraction of O}=\frac{1.96}{1.96}=1[/tex]

Converting the mole fraction into whole numbers by multiplying them with 2.

[tex]\text{Mole fraction of C}=2.5\times 2=5[/tex]

[tex]\text{Mole fraction of H}=5\times 2=10[/tex]

[tex]\text{Mole fraction of O}=1\times 2=2[/tex]

Step 3: Taking the mole ratio as their subscripts.

The ratio of C : H : O = 5 : 10 : 2

Hence, the empirical formula of the compound becomes [tex]C_5H_{10}O_2[/tex]

The empirical formula of the substance is[tex]C_5H_{10}O_2[/tex].

Explanation:

Given:

A compound made up of 58.8% of carbon, 9.87% hydrogen, and oxygen.

To find:

The empirical formula of this substance.

Solution

The percentage of carbon in a given substance by mass = 58.8%

The percentage of hydrogen in a given substance by mass = 9.87%

The percentage of oxygen in a given substance by mass :

[tex]= 100\%-58.8\%- 9.87\%=31.33\%[/tex]

Consider 100 grams of a substance.

In 100 grams of substance:

The mass of carbon =58.8% of 100 g = 58.8 g

The mass of hydrogen = 9.87% of 100 g = 9.87 g

The mass of oxygen = 31.33% of 100 g= 31.33 g

The moles of carbon [tex]=\frac{58.8 g}{12.0107 g/mol}=4.90 mol[/tex]

The moles of hydrogen[tex]=\frac{9.87g}{1.00784g/mol}=9.79 mol[/tex]

The moles of oxygen[tex]=\frac{31.33g}{15.999g/mol}=1.96 mol[/tex]

let the empirical formula of the substance = [tex]C_xH_yO_z[/tex]

The value of subscript x:

[tex]=\frac{4.90 mol}{1.96 mol}=2.5[/tex]

The value of subscript y:

[tex]=\frac{9.79mol}{1.96 mol}=5[/tex]

The value of subscript z:

[tex]=\frac{1.96mol}{1.96 mol}=1[/tex]

The empirical formula of a substance :

[tex]C_{2.5}H_5O_1=C_{\frac{25}{10}}H_5O_1=C_{25}H_{50}O_{10}[/tex]

Reducing to the lowest whole numbers:

[tex]C_{25}H_{50}O_{10}=C_5H_{10}O_2[/tex]

The empirical formula of the substance is [tex]C_5H_{10}O_2[/tex].

Learn more about the empirical formula here:

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(4.184 J——> 1 calorie ? Take your answer from number 1 and convert to the answer into calories?

Answers

Answer:

There are 1.195 calories in 5 J.

Explanation:

The relation between calorie and Joules is as follow :

4.184 J = 1 calorie

or

1 J = (1/4.184) calorie

Let the taken number is 5 J

So,

5 J = (5/4.184) calorie

5 J = 1.195 calorie

So, there are 1.195 calories in 5 J.

What is the theoretical yield of cyclohexene (in grams) that could be formed from 0.105 moles of cyclohexanol and 0.0444 moles of 85% phosphoric acid

Answers

Answer:

3.65 g of cyclohexene

Explanation:

Cyclohexanol + phosphoric acid ----> cyclohexene

The reaction is 1:1 hence the limiting reactant is phosphoric acid.

Hence,

1 mole of phosphoric acid yields 1 mole of cyclohexene

0.0444 moles of phosphoric acid yields 0.0444 moles of cyclohexene

Theoretical yield = number of moles of cyclohexene × molar mass of cyclohexene

Theoretical yield = 0.0444 moles of cyclohexene × 82.143 g/mol

Theoretical yield = 3.65 g of cyclohexene

Which elements are main-group elements?
1. Te
2. K
3. V
4. Re
5. Ag

Answers

Answer:

Te

K

Explanation:

Main group elements are elements designated and located on the s-block and p-block on the periodic table. The core group or prominent elements are the elements that make up those groups. These groupings comprise the most naturally rich and abundant elements. The main group elements are those whose characteristics are more predicted as a function of their periodic table location. From the given options, only Te and K are elements of the main-group.

An element of the environment that causes a population the decrease is

A) the birthrate minus the death rate

B) the carrying capacity

C) a limiting factor

D) the death rate

Answers

It’s option c. When resources are limited competition will increase => one will survive while other dies=> population will decline.

Good luck

Regards
BLACKSHARK

11th grade chemistry question will mark brainliest
2.50 g of CO2 gas is confined in a rigid cylinder at a pressure
of 4.65 atm. If 0.42 g of gas is released from the cylinder,
what is the new pressure?

Answers

Answer:

3.88 atm

Explanation:

We'll begin by calculating the number of mole of CO₂ in each case. This can be obtained as follow:

For 2.50 g of CO₂:

Mass of CO₂ = 2.5 g

Molar mass of CO₂ = 12 + (2×16) = 44 g/mol

Mole of CO₂ =?

Mole = mass / molar mass

Mole of CO₂ = 2.5 / 44

Mole of CO₂ = 0.06 mole

For 0.42 g of CO₂:

Mass of CO₂ = 2.5 g

Molar mass of CO₂ = 44 g/mol

Mole of CO₂ =?

Mole = mass / molar mass

Mole of CO₂ = 0.42 / 44

Mole of CO₂ = 0.010 mole

Finally, we shall determine the new pressure. This can be obtained as follow:

Initial mole (n₁) = 0.06 mole

Initial pressure (P₁) = 4.65 atm

Final mole (n₂) = 0.06 – 0.010 = 0.05 mole

Final pressure (P₂) =?

NOTE: Temperature and volume is constant.

P₁ / n₁ = P₂ / n₂

4.65 / 0.06 = P₂ / 0.05

Cross multiply

0.06 × P₂ = 4.65 × 0.05

0.06 × P₂ = 0.2325

Divide both side by 0.06

P₂ = 0.2325 / 0.06

P₂ = 3.88 atm

Thus, the new pressure is 3.88 atm.

I don’t want to fail help
I need correct answer if u don’t know I will report

When the researcher compiled information which research method did they most likely utilize?

a) documentary
b) survey
c) participant observation
d) case study

Answers

Answer:

a

Explanation:

documentary is best researcher!.

A dilute solution of an unknown ionic compound must be identified. Several experiments are run on solutions that contain the possible ions with the results tabulated below. Cation Addition of HCl Heated in hot water Ag+ White precipitate is formed No observable change Pb+2 White precipitate is formed Precipitate dissolves Zn+2 No observable change No observable change Anion Addition of Ca(NO3)2 Addition of HNO3 CO3–2 White precipitate is formed Precipitate dissolves and bubbles form PO4–3 White precipitate is formed Precipitate dissolves A white precipitate is formed when HCl is added to the unknown compound. When the white precipitate is heated in hot water, it does not dissolve. A white precipitate is formed when Ca(NO3)2 is added to the unknown compound. When HNO3 is added to the precipitate, it dissolves and bubbles are formed. What is the chemical formula of the unknown ionic compound?

Answers

Answer:

The chemical formula of the unknown ionic compound is Ag₂CO₃.

Explanation:

The method used to identify the ions present in a given solution of an unknown compound is known as qualitative analysis. Specific tests are carried based on the chemical reaction of these ions and the results they give in these reactions, the ions present innthe compound are identified. Some of the results or observations include formation of precipitates on addition of certain reagents, evolution of gases, colour changes, as well as the color changes that are observed in a flame test of a solutionmof these compounds.

In the given question, when testing for cations, a white precipitate is formed when HCl is added to the unknown compound. When the white precipitate is heated in hot water, it does not dissolve.

From the table of observations, both Ag+ and Pb²+ give a white precipitate on addition of HCl but Zn²+ does not. So the cation present is either Ag+ or Pb²+. However, when heated in hot water, the white precipitate does not dissolve as will be observed if Ag+ were the cation present. Thus, the cation is Ag+.

When testing for anions, a white precipitate is formed when Ca(NO3)2 is added to the unknown compound and when HNO3 is added to the precipitate, it dissolves and bubbles are formed.

Now comparing these results with that as observed with CO₃²- and PO₄³-, both form white precipitates on addition of Ca(NO₃)₂, and the precipitate dissolves on addition of HNO₃. However, only CO₃²- dissolves with the production of bubbles when HNO₃ is added. Thus, the anion is CO₃²-.

Therefore, the compound is Ag₂CO₃ which is formed from the cation Ag+ and CO₃²-.


The boiling point of a liquid is 50°C. What is this temperature on the Kelvin scale?

Answers

Answer:

323.15 or just 323 depending on the teacher

323 K I believe

273+50=323

Which is a property of all bases?

Answers

Answer: The property of all bases is that they are substances which neutralizes an acid to form a salt and water only.

Explanation:

A base is also s substance that can accept or combine with a proton; a proton acceptor.

Bases include the oxides, hydroxides and carbonates of metals. These include MgO,Na2O, NaOH,Ca(OH)2. Most metals burn in oxygen to form metallic oxides which are basic. Examples are the MgO and Na2O.

Other properties or characteristics of bases includes:

--> They have a bitter taste.

--> They turn red litmus paper blue.

--> They are soapy to touch.

--> Aqueous solutions of bases are also electrolytes. Bases can be either strong or weak, just as acids can.

Bases (sodium hydroxide) can be used in the preparation of soaps, glass, paper and rayon. While some bases (magnesium hydroxide) can also be used to manufacture toothpaste and laxatives.

2x^2+8x-7 solve the equation

Answers

Answer:

x = (-4 + √30) / 2, or x = (-4 – √30) / 2

Explanation:

x = (-b ± √b² – 4ac) / 2a →

y = ax² + bx + c

given

y = 2x² + 8x – 7 →

x = (-(8) ± √(8)² – 4(2)(-7)) / 2(2) →

x = (-8 ± √64 + 56) / 4 →

x = (-8 ± √120) / 4 →

x = (-8 ± 2√30) / 4 →

x = (-4 ± √30) / 2 →

x = (-4 + √30) / 2, or x = (-4 – √30) / 2

Other Questions
which answer option most likely describes an essay written to persuadea.An essay explaining how to protect a computer from viruses b.An essay sharing a humorous experience at the zooc.An essay discussing reasons why students should not be required to take exams d.An essay giving facts about nutrition Eve got home from school at 2:20 P.M. And played video games for 17 minutes. Then she helped clean the kitchen for 1 hour and 1 minute and spent 1 hour and 7 minutes finishing her homework. What time was it when Eve finished her homework? Just answer the questions please Its not A its wrong dose anyone know the answer can you answer with working out 1. The lease common multiple of 3, 4, 6, and 8 isOA. 8.OB. 24.O C.72.OD.96. Point Q is located at (-4, 6). Point R is located at (8, 6).What is the distance from point Q to point R? Can you give an example of when you had too much to do and were under pressure? How did you react? Conduct a mini-census by counting the members of your extended family, and emphasize age. Try to include three or four generations, if possible. Create a table and include total population plus percentages of each generation. Next, begin to analyze age patterns in your family. What issues are important and specific to each group? What trends can you predict about your own family over the next ten years based on this census? For example, how will family members needs and interests and relationships change the family dynamic? What are the early symptoms of HIV, and how do they contribute to the spread of this virus? I have to create a restaurant for one of my periods and i want to create a pixel art that is a cake. I keep having brain farts so I was wondering if anyone has any ideas on how the cake should look. Fill in the blank by selecting the answer from the drop-down menu.Creative Commons allows the creator of an artistic work to Never show the work to anyone.Share the work in the way she chooses.Play the song on the street. Replace copyright with freedom of speech. How would you describe Walden Pond? . Tachycardia means ...................heart rate a) fast b) slow c) irregular d) arrhythmic If d= the number of dogs ,which variable expression represents the phase below? The sun of the number of dogs and the 6 cats Chinstrap and Gentoo penguins are two species of penguins that feed on krill in the Antarctic Ocean. a. Trueb. False Reflect figure E across the x-axis and then reflect across the y-axis. What is the resulting figure?rectangle DBrectangle B9rectangle C10rectangle A bRamapo Company produces two products, Blinks and Dinks. They are manufactured in two departments, Fabrication and Assembly. Data for the products and departments are listed below. Product Number of Units Direct Labor Hours Per Unit Machine Hours Per Unit Blinks 1,048 4 7 Dinks 2,236 5 6 All of the machine hours take place in the Fabrication department, which has an estimated overhead of $82,200. All of the labor hours take place in the Assembly department, which has an estimated total overhead of $102,000. Ramapo Company uses a single plantwide overhead rate to apply all factory overhead costs based on direct labor hours. The factory overhead allocated per unit of Dinks is What was the purpose of the Freedmen's Bureau?(A) To help newly freed slaved establish schools and settle disputes(B) To help newly freed slaved organize themselves into political parties(C) To help African Americans move to Liberia and establish their own nation(D) To fund African Americans who wanted to run for public office 4. What does it mean if someone has a predisposition for asthma?O That person has a natural Immunity to asthma and will not develop it.O That person is guaranteed to develop asthma at some time in his or her life.O That person lives in an environment with polluted air, tobacco smoke, or animal dander.That person is more likely than the average individual to develop asthma.