CHEMISTRY HIGH SCHOOL

2 How many
molecules of water are
there in 1g of water CH₂)​

Answers

Answer 1
Answer:

Answer:

3.3345 x 10^22
Answer 2
Answer: The molar mass of the water molecule is 18 g/mol. It implies that 1 mol of water molecules weigh 18 g.

Now you can calculate easily the number of water molecules present in 1 g of water. Calculation follows

18 g of water contains 1 mol of water molecules.

or 18 g of water contains 6.022 x 10^23 water molecules.

or 1 g of water contains (6.022 x 10^23)/ 18 water molecules and the number comes out to be 3.3455 x 10^22.

So the number of water molecules present in 1 g of water is 3.3455 x 10^22.

I

Hope this helps you

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Which substance is a molecule?A. water
B. sodium
C. salt water
D. sand and salt

Answers

The answer would be salt Water hope I helped you
The answer is water :D

An element's atomic number is the A. weight of the atom.
B. sum of the protons and neutrons in an atom.
C. number of protons in an atom's nucleus.
D. mass of the atom

Answers

Answer:

C. number of protons in an atom's nucleus.

Explanation:

Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.

However, when we talk about the atomic number of the ion, it is not equal to the number of electrons as electron can be gained or loosed.

This is why, more appropriately, the number of the protons which are present in the nucleus of the atom is called the atomic number.

For example, Sodium has 11 protons in its nucleus which suggest that the atomic number of sodium is 11.
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What term is used to describe a perfect radiator and absorber of electromagnetic radiation?

Answers

Blackbody is the term used to describe a perfect radiator and absorber of electromagnetic radiation. 

The recipe for pumpkin pie calls for 3 tablespoons of flour and 1.5 cups of sugar for each pie. Which of the following conversion factors would be used to find out how many pies could be made from 7.5 cups of sugar.

Answers

Answer:

5 pumpkin pies could be made with 7.5 cups of sugar.

Explanation:

The conversion factor to solve the problem is:

7.5 cups of sugar*(1 pie)/(1.5 cups of sugar) = 5 pies

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Answers

Below are the choices and the answer is C. 

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B. ∆G=positive, ∆H= positive, ∆S= positive, T = large 
C. ∆G=negative, ∆H= negative, ∆S= positive, T = large 
D. ∆G=negative, ∆H= positive, ∆S= negative, T = large 
E. ∆G=positive, ∆H= positive, ∆S= negative, T = large

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Briefly explain why adding insulation to an attic helps reduce heating costs.

Answers

Answer:

Insulation reduces the exchange of heat through a surface such as a wall, attic, duct or roof. In a well-insulated home, less warm air escapes from the house during the winter, and less cool air escapes during the summer, reducing the amount of energy needed for heating and cooling

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