Chemistry Worksheet NAME:
Moles, Molar Mass, and Avogadro's Number
Show all work for problems that require calculations.
1. How many atoms are there in one mole of carbon?
Ans.
2. What is the mass of one mole of carbon atoms?
Ans.
3. What is the mass of 5.0 mole of Barium?
Ans.
4. How many moles of tin atoms are there in 250 grams of tin?
Ans
5. How many atoms are there in 250 grams of tin?
Ans.
6. How many atoms are there in 5.0 grams of gold?
Ans
7. What is the mass of 6.56 mole of Nitrogen?
Ans
8. How many moles of water molecules are there in 39 grams of Chlorine?
Ans
9. How many molecules are there in 39 grams of Gold
Ans
10. What is the mass of 6 02 * 10 ato
atoms of aluminum?

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Explanation:

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".