Answer:
here you go
Explanation:
5 elements and properties:
Boron- The chemical properties of boron are more similar to carbon and silicon than elements of its own group, although boron is more electron deficient. Boron has a high affinity for oxygen-forming borates, and reacts with water at temperatures above 100 °C to form boric acid and other boron compounds.
Carbon- As a member of group 14 on the periodic table, it is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. The most common isotope of carbon has 6 protons and 6 neutrons, and has an atomic mass of 12.0107 amu. Its ground state electron configuration is 1s22s22p2.
Nitrogen- Nitrogen gas (chemical symbol N) is generally inert, nonmetallic, colorless, odorless and tasteless. Its atomic number is 7, and it has an atomic weight of 14.0067. Nitrogen has a density of 1.251 grams/liter at 0 C and a specific gravity of 0.96737, making it slightly lighter than air.
Oxygen- is the air you breath
Nickel- Nickel is a hard silver white metal, which forms cubic crystals. It is malleable, ductile, and has superior strength and corrosion resistance. The metal is a fair conductor of heat and electricity and exhibits magnetic properties below 345°C
5 compounds and properties:
Water - Formula: H2O = Hydrogen2 + Oxygen. ...
Hydrogen Peroxide - Formula: H2O2 = Hydrogen2 + Oxygen2 ...
Salt - Formula: NaCl = Sodium + Chlorine. ...
Baking Soda - Formula: NaHCO3 = Sodium + Hydrogen + Carbon + Oxygen3
Octane - Formula: C8H18 = Carbon8 + Hydrogen18
hope this helps
What are the three main parts of an atom and what are their charges?
Where are the electrons found in an atom?
Answer:
Three main parts are Protons (pos charge) Neutrons (no charge) Electrons (negative charge) and the electron is found on the outside of the nucleus
Explanation:
Predictions about the future based on the position of planets is an example of physics biology earth science pseudoscience
Answer:
Pseudoscience
Explanation:
Predicting the future based solely on the position of the planets is an example of pseudoscience.
Pseudoscience is a body of knowledge that is not based on the scientific method but on some unverifiable/unprovable claims.
Predictions about the future can only be valid if it is based on the scientific method, not just about the position of the planet. The scientific method involves observation, hypothesis formulation, testing of the hypothesis through repeatable experiments, and arriving at conclusion.
Any other statement or belief that is not based on these procedures is said to be pseudoscientific.
Answer:
The answer to your question is pseudoscience.
Explanation:
I took the module 1 exam and got it right, yesterday.
What do the letters ESM stand for?
Answer:
European stability mechanism
which diagram would it be?
Answer:
2CH4 ------> 3H2 + C2H2
Explanation:
The law of conservation of mass states that atoms can neither be created nor destroyed in a chemical reaction.
The implication of this law is that the number of atoms of each element on the reactant side must be equal to the number of atoms of each element on the product side.
This law is only obeyed by the reaction, 2CH4 ------> 3H2 + C2H2
There were eight atoms of H on the left hand side as well as the right and side of the reaction equation. There were two atoms of C on both the left and right hand sides of the reaction equation respectively. Hence, the law was obeyed here.
A certain chemical contains 46.30% chlorine, 47.05% carbon, 6.63% hydrogen. What is the molecular formula of the compound? The molar mass of the compound was determined to be 153.052g/mol.
C6H10CI2
C6H8CI2
C3H5CI
C4H4CI
C8H8CI2
Answer:
C6H10Cl2
Explanation:
Convert mass % to mass
100g of the compound contains from each elements: 46,3g Cl; 47,05g C and 6,63g H
Molar mass
Cl = 35.5 g/mol
C = 12 g/mol
H = 1 g/mol
Find the number of moles:
Chlorine: 46.4g /35.5g/mol = 1,3 moles
Carbon: 47,05g/12 g/mol = 3,92 moles
hydrogen: 6,63g/1g/mol = 6,63 moles
Molar fraction:
Cl = 1,30/ 1,30 = 1
C = 3,92/ 1,30 = 3,01
H = 6,63/ 1.30 = 5,01
C3H5Cl = 76,5 g/ mol x 2 = 153 g/ mol
So multiply the molecular formula by two = C6H10Cl2
An object has a volume of 825 cm3 and a density of 13.6 g/cm3. Find its
mass
The mass of an object is the product of its volume and density. The mass of a the object with a volume of 825 cm³ and a density of 13.6 g/cm³ is 11220 g.
What is density ?Density of substance is the measure of its mass per unit volume. It describes how closely its particles are packed. Density depends on the bond type, temperature and pressure.
Volume of the object is the space occupied by its particles. Volume can be expressed in L, ml, cm³, dm³ etc. Only solids and liquids has a definite volume and the volume of gases is that of the container.
Give that, volume of the object = 825 cm³
density = 13.6 g/cm³
Mass = volume × density
m = 825 cm³ × 13.6 g/cm³ = 11220 g
Therefore, the mass of the object is 11220 g.
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What is the charge of an electron?
A-negative
B-neutral
C-positive
D-none of these
S-L Line
760
L-G Line
LIQUID
PRESSURE OF THE SUBSTANCE mm Hg
380
SOLID
58
GAS
-S-G Line
O'c
100°C
TEMPERATURE OF THE SUBSTANCE
S-L Line: Line showing conditions in which solid
and liquid phases are in equilibrium.
L-GLine: Line showing conditions in which liquid
and gas phases are in equilibrium
S-G Line: Line showing conditions in which solid
and gas phases are in equilibrium
What is the approximate vapor pressure when the gas condenses at 80'C?
200
05
760
430
A mass of a gas occupies 840cm cube at 750mm pressure, what volume would it occupy at 780mm pressure
The final volume : 807.69 cm³
Further explanationGiven
Initial volume : 840 cm³
Initial pressure : 750 mmHg
Final pressure : 780 mmHg
Required
The final volume
Solution
Boyle's Law
At a fixed temperature, the gas volume is inversely proportional to the pressure applied
[tex]\tt p_1V_1=p_2.V_2\\\\\dfrac{p_1}{p_2}=\dfrac{V_2}{V_1}[/tex]
Input the value :
V₂=(P₁V₁)/P₂
V₂=(750 x 840)/780
V₂=807.69 cm³
List and describe all five types of chemical reactions. thx.
Answer:
combination, decomposition, single-replacement, double-replacement, and combustion.
Explanation:
Base changes phenolphthalein to pink it is true or false
Answer:
It’s false
Explanation:
it could be true if the question mentioned alkaline solution
Answer:
True
Explanation:
Phenolphthalein is colorless in the presence of an acid and turns pink in the presence of a base.
what does group 16 (oxygen family) have in common
Answer: here is your answer
Explanation:
The oxygen family consists of the elements that make up group 16 on the periodic table: oxygen, sulfur, selenium, tellurium, and polonium. These elements all have six electrons in their outermost energy level, accounting for some common chemical properties among them.
Answer:
they all have 6 valence electrons
Explanation:
all elements in group 16 have 6 valence electrons
Define the terms heredity and inherited in your own words.
Answer:
Heredity is when you have gotten either physical or mental traits from your parents.
Inherited in Biology: Getting traits from your parents
Inherited outside Biology: is the practice of passing on private property, titles, debts, privileges, rights, and obligations upon the death of an individual.
Explanation:
Low, gray, layered clouds that cover the sky and bring steady rain are O A. cumulus O B. cirrus O C. cumulonimbus OD. nimbostratus
Answer:
D Nimbostratus
Explanation:
A compound was analyzed and found to contain the following percent composition: 2.056% hydrogen, 32.69% S, and 65.26% oxygen. Calculate the empirical formula.
Answer:
H2SO4
Explanation:
Firstly,
2.056% hydrogen = 2.056g of H
32.69% Sulphur = 32.69g of S
65.26% oxygen = 65.26g of O
Next, we convert each mass into moles by dividing by their respective molar mass:
H = 1, S = 32, O = 16
H = 2.056/1 = 2.056mol
S = 32.69/32 = 1.021mol
O = 65.26/16 = 4.078mol
Next, we divide each mole value by the smallest mole value (1.021)
H = 2.056/1.021 = 2.01
S = 1.021/1.021 = 1
O = 4.078/1.021 = 3.99
Approximately the ratio of H to S to O is 2:1:4, hence, the empirical formula for H, S and O is H2SO4.
The empirical formula of a chemical compound is the simplest whole-number ratio of atoms present in a compound
The correct answer of the following is [tex]H_2SO_4[/tex]
The data is given as follows:-
2.056% hydrogen = 2.056g of H 32.69% Sulphur = 32.69g of S65.26% oxygen = 65.26g of O
We have to find the moles in the reaction.
The mas of the element is as follows:-
H = 1S = 32O = 16
After solving the equation we get
[tex]H = \frac{2.056}{1} = 2.056mol\\\\S = \frac{32.69}{32} = 1.021mol\\\\O = \frac{65.26}{16} = 4.078mol[/tex]
Next, we divide each mole value by the smallest mole value (1.021)
[tex]H = \frac{2.056}{1.021} = 2.01\\\\S = \frac{1.021}{1.021} = 1\\\\O = \frac{4.078}{1.021} = 3.99[/tex]
The ratio of H to S to O is 2:1:4,
Hence, the empirical formula for H, S, and O is [tex]H_2SO_4.[/tex]
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Why do we sometimes use roman numerals in naming ionic compounds?
We use roman numerals to indicate the oxidation state of metal atoms when naming compounds especially in the case of coordination compounds. It is a standard system of nomenclature.
What is oxidation state?Oxidation state of a species is the number electrons gained or lost. Oxidation state increases if electrons are lost from the atom and it will be decreased if electrons are gained.
For example, copper is in + 2 oxidation state in CuSO₄, thus it can be indicated as Cu(II). Copper can exists is +3 oxidation too. Thus the representation will be Cu (III).
All the transition metals like copper exhibit various oxidation state. So it is important to indicate in which oxidation state they are in a particular compound. In the compound Fe₂O₃, iron is in + oxidation state whereas in FeSO₄, it can be +2 . Thus it is important to note whether it is Fe (II) or Fe (III).
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Do the following ! I'LL MARK THE BRAINLEST!
ITS SCIENCE!
Answer:
it's easier to look it up
Explanation:
You need to make an aqueous solution of 0.150 M sodium fluoride for an experiment in lab, using a 500 mL volumetric flask. How much solid sodium fluoride should you add?
Answer:
Explanation:
Solution required is .15 M 500 mL sodium fluoride .
molecular weight of sodium fluoride = 42
one mole of sodium fluoride = 42 grams
No of moles contained in the solution of .15M , 500 mL solution
= .15 x 0.5 moles = .075 moles
1 mole = 42 g
.075 moles = .075 x 42 = 3.15 grams .
So mass of sodium fluoride required = 3.15 g .
the electrolyte in automobile lead storage batteries is a 3.75 sulfuric acid solution that has density of 1.230g/mL. calculate the mole fraction.
The mole fraction of sulfuric acid : 0.073
Further explanationGiven
3.75 M sulfuric acid solution that has density of 1.230 g/mL
Required
The mole fraction
Solution
3.75 M = 3.75 mol/L
For 1 L solution :
mass of solution = 1230 g
mass Sulfuric acid : 3.75 mol x 98 g/mol=367.5 g
mass water = 1230-367.5 = 862.5 g
mol water = 862.5 : 18 g/mol= 47.92
mol total = 3.75 + 47.92 = 51.67
mole fraction of sulfuric acid :
= 3.75 : 51.67
= 0.073
Imagine being barefoot outside on a hot summer's day in a sunny place ,would
you rather be standing on concrete or grass? Why?
Answer:
Grass
Explanation:
On a hot summers day, while barefoot Concrete normaly has heat absorbed into it. (Or on top) So when you go to Walk on it, It normally burns the heel.
Hope I helped and Have a great day!
brainliest?
Answer:
grass
Explanation:
the concrete has a higher specific heat capacity and is basically hotter than the grass which has a lower one
Over the past week, Anna has been very curt with shondra, and when she ask if she has done something to offend her, Anna tersely replies, "no, everything is fine" what should shondra do
Answer:
A. avoid talking to Anna altogether and stay out of her way
B. ask her manager for advice
C. check with Gary to see if there is any gossip about what's going on with Anna
D. take a curt approach of her own to show Anna how it feels
Explanation:
ANSWER: B.
What will be the mass of 9.95 liters of propane gas (C3H8) at STP?
Answer:
19.5g
Explanation:
Given parameters:
Volume of propane gas = 9.95L
Unknown:
Mass of propane gas = ?
Solution:
To solve this problem, find the number of moles first.
At STP;
22.4L of gas makes up 1 mole
9.95L of gas will have a [tex]\frac{9.95}{22.4}[/tex] = 0.44mole
So;
Mass of propane gas = number of moles x molar mass
Molar mass of propane = 3(12) + 8(1) = 44g/mol
Mass = 0.44 x 44 = 19.5g
PLEASE HELP!! ILL MARK BRAINLIST!!
I think this is gonna be 2050 for memers
Answer:
HOLY WOAH
Explanation:
YES
Name the following parts:
A—-
B——
C——
Can someone plz help? Thanks so much!
An atom that contains 6 protons 6 neutrons and 6 electrons has a mass of approximately
1) 12 u
2) 12 g
3) 18 u
4) 18 g
Answer:
12 grams
Explanation:
Electrons do not contribute to mass. The proper unit to use is G
36.0 g of Be contains how many moles?
Answer:
Explanation:
4
In order to prove that the Law of Conservation Mass is obeyed, what are the coefficients
needed to balance the following reaction:
C3Hg +
02
1
CO2 +
H2O
Answer: [tex]C_3H_8+5O_2\rightarrow 3CO_2+4H_2O[/tex]
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
The balanced chemical equation for combustion of propane will be :
[tex]C_3H_8+5O_2\rightarrow 3CO_2+4H_2O[/tex]
describe how oxides of nitrogen are produced when petrol is burned in car engines !!HELP!!
Answer:
Answer is on the pic
Explanation:
I hope it's helpful!
How does adaption allow mice with the mutation to survive better in some areas
Answer: Mutations can cause instant adaptations, while natural selection is the process by which adaptations occurs over a series of generations. Adaptations are changes or processes of changes by which an organism or species becomes better suited for its environment. A mutation is an alteration of the DNA sequence.
