help ? if yk the answer ? please help k

Help ? If Yk The Answer ? Please Help K
Help ? If Yk The Answer ? Please Help K

Answers

Answer 1

Answer:

1: X and Y

2: A

Explanation:


Related Questions

how is this equation read?
4Na (1) +Mn(SO 4 ) 2 (aq) Mn (3) +2Na 2 SO

Answers

The answer is A, do you want me to explain it? It’s pretty simple, you just need to follow all the signs in brackets and match them in those in the answer
Rawr it a yesirrrrrrrrr

Which ion forms the strongest ionic bond with a given anion? ​

Answers

Answer:

Explanation:

A cation with a 2+ charge will make a stronger ionic bond than a cation with a 1+ charge. A larger ion makes a weaker ionic bond because of the greater distance between its electrons and the nucleus of the oppositely charged ion.

C3Hg + 02 → CO2 + H2O
This chemical equation represents the combustion of propane. When correctly balanced, the coefficient for water
is
16.
2.
8.
4.

Answers

Answer:

4

Explanation:

The following equation, which depicts the combustion of propane, is given in this question as follows:

C3H8 + 02 → CO2 + H2O

However, this equation is not yet BALANCED because the number of atoms of each element is not the same on the reactant and product side. To balance the equation, we make use of COEFFICIENT to ensure that the number of atoms of each element on both side correlates.

The balanced equation is as follows:

C3H8 + 502 → 3CO2 + 4H2O

Therefore, the coefficient for water (H2O) after balancing the equation is 4.

The study of chemicals is called chemistry.

The correct answer is D.

The equation is not yet BALANCED because the number of atoms of each element is not the same on the reactant and product sides.

To balance the equation, we make use of COEFFICIENT to ensure that the number of atoms of each element on both sides correlates.

After balancing the equation is as follows:

[tex]C_3H_8 + 50_2 → 3CO_2 + 4H_2O[/tex]

Hence, the correct answer is 4 which shows the balanced water.

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How many grams of NH3 are needed to make 2.50 moles of (NH4)2SO4?
2 NH3(g) + H2SO4(aq) --> (NH4)2SO4(aq)

Answers

Answer:

85.155g NH3

Explanation:

3. A sample of neon gas has a volume of 1.2 L at 28.5°C. What will the volume be at 125°C it the
pressure remains constant?

Answers

Answer:

1.58L

Explanation:

Given parameters:

Initial volume  = 1.2L

Initial temperature  = 28.5°C  = 28.5 + 273  = 301.5K

Final temperature  = 125°C  = 125 + 273  = 398K

Unknown:

New volume  = ?

Solution:

Volume and temperature relationship is resolved using the Charles's law.

The law states that "the volume of a fixed mass of a gas varies directly as its absolute temperature if the the pressure is constant".

So;

       [tex]\frac{V1}{T1}[/tex]    = [tex]\frac{V2}{T2}[/tex]  

V1 is the initial volume

T1 is the initial temperature

V2 is the new volume

T2 is the new temperature

             [tex]\frac{1.2}{301.5}[/tex]    = [tex]\frac{V2}{398}[/tex]    

              301.5V2  = 477.6

                       V2  = 1.58L

Hydrazine, N2H4, and hydrogen, H2O2, have been used as rocket propellants. They react according to the equation:

H2O2 + N2H4 → N2 + H2O

a. How many moles of N2 are formed from 0.0250 moles of N2H4? (0.0250)

b. How many moles of H2O2 are required if 1.35 moles of H2O is to be produced? (0.675)

c. How many moles of H2O are formed if 1.87 moles of N2 is produced? (7.48)

Answers

Explanation:

The equation of the reaction is;

H2O2 + N2H4 → N2 + H2O

Upon balancing the reaction, we have;

N2H4 + 2H2O2 → N2 + 4H2O  

a. How many moles of N2 are formed from 0.0250 moles of N2H4?

From the equation of the reaction;

1 mol of N2H4 produces 1 mol of N2

0.0250 mol of N2H4 would produce x mol of N2

1 = 1

0.0250 = x

x = 0.0250 * 1 / 1 = 0.0250 mol

b. How many moles of H2O2 are required if 1.35 moles of H2O is to be produced?

From the equation of the reaction;

2 mol of H2O2 produces 4 mol of H2O

x mol of H2O2 produces 1.35 mol of H2O

2 = 4

x = 1.35

x = 1.35 * 2 / 4 = 0.675 mol

c. How many moles of H2O are formed if 1.87 moles of N2 is produced?

The relationship between H2O produced and N2 is;

For every 1 mol of N2 produced, 4 mol of H2O is produced

1.87 mol of N2 produced, how many moles of H2O is produced?

1 = 4

1.87 = x

x = 1.87 * 4 / 1 = 7.48 mol

Put the levels of organization in order from smallest to largest

Organism
Community
Ecosystem
Population

Answers

organism
population
community
ecosystem
organism
population
ecosystem
community

An object has a volume of 825 cm3 and a density of 13.6 g/cm3. Find its
mass

Answers

answer: 11,200 g

step by step explanation:

D= M/V
M= DV
M= (13.6 g/cm^3) (825cm^3)
M= 11,200 g

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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Why are some energy resources more expensive to use than others?

Answers

because they are more effective and reliable

1 Condensation
2. Groundwater
3. Infiltration
4. Evaporation
5. Transpiration
6. Precipitation
7. Runoff
8 Solar Radiation

Answers

Answer:

Explanation:

A ) Solar Radiation

B ) Evaporation

C ) Transpiration

D ) Condensation

E ) Precipitation

F ) Run Off

G ) Infiltration

H ) Groundwater .

Low, gray, layered clouds that cover the sky and bring steady rain are O A. cumulus O B. cirrus O C. cumulonimbus OD. nimbostratus​

Answers

Answer:

D Nimbostratus

Explanation:

The complete combustion of acetic acid, HC2H3O2(I) to form water, H2O(I), and CO2(g), at constant pressure releases 871.7 kJ of heat per mol of acetic acid.
Write a balanced thermochemical equation if 5.0g of acetic acid will be used in the reaction.
HC2H3O2(I) + O2 --- H2O(I) + CO2(g) H= -871.7 kJ

Answers

Answer:

HC2H3O2(I) + O2(g) ---> H2O(I) + CO2(g) ΔH= -72.35 kJ

Explanation:

We know that 5.0 g of acetic acid will contain, 5.0g/60 g/mol = 0.083 moles of acetic acid

Now from the reaction equation;

1 mole of acetic acid evolved -871.7 KJ of heat

0.083 moles of acetic acid will evolve 0.083 * -871.7 = -72.35 KJ

For 5.0 g of acetic acid, we can write;

HC2H3O2(I) + O2(g) ---> H2O(I) + CO2(g) ΔH= -72.35 kJ

Arrange the following atoms in order of increasing size (radius).
Te, S, Se
K, Br, Ni
Ba, Si, F

Answers

Answer:

S<Se<Te

Br<Ni<K

F<Si<Ba

Explanation:

Which of the following is not a unit of volume?

A

L


B

mL


C

m^3

​3

​​


D

cm^2

​2
PLEASE ANSWER ASAP !! NEED THIS HANDED IN TN
​​

Answers

Answer:

The orest one is possible D

Explanation:

show how to work out...Calculate the mass in grams of 3.50 x 1025 atoms of lithium. Answer: 404g Li​

Answers

Take your number of atoms and divide by Avrogadros number, then multiply by molar mass of lithium to get your final answer

C₃ H8
What is the subscript for carbon in this molecule?

Answers

Answer:

3

Explanation:

Subscript basically tells you the number of element or ions present in a compound. In this case the subscript of carbon which is 3 denotes that only three carbon atoms is present in the compound.

what is rusting of iron?​

Answers

Answer:

Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Unlike rust, which can flake off the surface of iron and steel objects, the layer of aluminium oxide does not flake off.

Explanation:

Rusting = oxidation reaction
Iron = reacts with oxygen and water to form hydrated iron oxide, we then start to see rust.
This prevents the metal from coming in any contact with air. Hope this helps :)

Predictions about the future based on the position of planets is an example of physics biology earth science pseudoscience

Answers

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.

would using a strainer be filtration?

Answers

Answer:

To some extent, yes

Explanation:

The amount of force on an area is know as volume, acceleration, pressure, or momentum

Answers

Answer:

Pressure

Explanation:

What is the temperature change that 725 g of aluminum will undergo when 2.35 x 104
J of thermal energy are added to it?

Answers

Answer:

36°C

Explanation:

Given parameters:

Mass of aluminum = 725g

Quantity of heat  = 2.35 x 10⁴J

Unknown:

Temperature change  = ?

Solution:

To solve this problem, we simply use the expression below:

  The quantity of energy is given as:

          Q  = m C Δt

Q is the quantity of energy

m is the mass

C is the specific heat capacity of aluminum  = 0.9J/g°C

Δt is the change in temperature

  The unknown is Δt;

             Δt  = [tex]\frac{Q}{mc}[/tex]    = [tex]\frac{2.35 x 10^{4} }{725 x 0.9}[/tex]    = 36°C

Water has a molar mass of 18.0 g/mol. How many particles of water do you drink if you drink 64 oz., or 1893 grams, of water in a day?

Answers

Answer:

[tex] \frac{1839}{18} = 102.16[/tex]

Take 102.16 and multiply by avogadros #

and you get 6.33 × 10^25 otherwise A

Answer:

Answer is A

Explanation:

I just took this.

Name the following compounds and classify them as ionic or covalent.
a. Cu2CrO4
b. Ba(NO3)2
c. Cl2O
d. BrF5

Answers

A-copper chromate oxide ionic I think
B-barium nitrate ionic
C-chlorine monoxide ionic
D- Bromine pentafluoride covalent

The classification of the above given compounds would be listed below as follows:

a.) Cu2CrO4 = ionic

b. Ba(NO3)2 = ionic

c. Cl2O = ionic

d. BrF5= covalent

What is an ionic or covalent compound?

An ionic compound are those chemical substances that are made up of both positively charged ions called cations and negatively charged ions called anions.

A covalent compound is defined as the type of chemical compound that is formed when two nonmetals react with each other. This is seen in the chemical compound BrF5 where bromine and fluorine which are both nonmetals react with each other.

Learn more about chemical compounds here:

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what is the mass of 1.75 moles of HF?

Answers

Answer:

Mass = 35.02 g

Explanation:

Given data:

Number of moles = 1.75 mol

Mass of HF = ?

Solution:

Formula:

Mass = number of moles × molar mass

Molar mass of HF = 20.01 g/mol

by putting values,

Mass = 1.75 mol × 20.01 g/mol

Mass = 35.02 g

In the laboratory you dissolve 12.7 g of silver fluoride in a volumetric flask and add water to a total volume of 125. mL. What is the molarity of the solution?​

Answers

Answer:

Molarity = 2.4 M

Explanation:

Given data:

Mass of silver fluoride = 12.7 g

Volume of water = 125 mL (125 mL× 1 L /1000 mL = 0.125 L)

Molarity of solution = ?

Solution:

Number of moles of silver fluoride:

Number of moles = mass/molar mass

Number of moles = 12.7 g/ 41.98 g/mol

Number of moles = 0.30 mol

Molarity:

Molarity = number of moles of solute / volume in L

Molarity = 0.30 mol / 0.125 L

Molarity = 2.4 M

Is water a reactant or product?

Answers

Answer: Reactant

Explanation:

In simple wording, Water act as a reactant and it broke or we can say split the larger molecule in the smaller ones, The H and OH bonds are attached to the two products that are formed after the reaction. Another process in which water is used as an important reactant is photosynthesis.

How many moles are present in 44.8 L of nitrogen gas (Na)?

Answers

Answer:

two moles

There are two moles.

Explanation:

help PLZ will give brainliest

Answers

Answer:

6.Crust

7. outer core

8.mantle

The picture below is of oxygens bonded together. This forms a...

a) molecule
b) element
c) molecular compound
d) atom​

Answers

Answer:

Explanation:

The picture shows two similar structures bonded together so it can not be an atom or molecular compound .

It is a molecule . Each structure ( lobe ) represents atom of oxygen . Molecule of oxygen contains two atoms bonded together .

Molecule of oxygen = O₂ .

why do astronauts on the moon seem like they're "Walking on springs" while on earth we are firmly attached to the ground

Answers

Because of the moon's considerably lower gravity. The moon's gravity is about 1/4 as strong as the earth's gravity.
Our muscles a built to carry us on the earth. The astronauts are used to walking on earth so when they push forward with their legs they tend to use the same amount of energy which is 4 times more than needed. That push causes them to rise, Newton's second law
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