1.) Be sure to answer all parts. Enter your answers in scientific notation.

How many carbon atoms are contained in each of the following number of moles:

(a) 1.80 mol;

(b) 6.60 mol?

Report answer using three significant figures.

2.) How many molecules are contained in each of the following number of moles?

Report your answer using two significant figures.

a. 8.2 mol of penicillin molecules

b. 0.78 mol of NH₃ molecules

3.) How many molecules are contained in each of the following number of moles?

Report your answer using correct significant figures.

a. 0.27 mol of sugar molecules

b. 52.8 mol of acetaminophen molecules

4.) L-Dopa is a drug used to treat Parkinson's disease.

(Write your molecular formula in the following format: C_wH_xN_yO_z)

a. What is the molecular formula of L-dopa?

b. What is the molecular weight of L-dopa?

c. What is the molar mass of L-dopa?

5. How many grams are contained in 6.20 mol of each compound?

Do not convert these answers to scientific notation.

a. HCl

b. Na₂SO₄

6.) How many grams are contained in 6.50 mol of each compound? Do not convert these answers to scientific notation.

a. C₂H₂

b. Al(OH)₃

7.) How many moles are contained in each number of grams of table sugar

(C₁₂H₂₂O₁₁,molar mass 342.3 g/mol)? Enter your answer in scientific notation.

a. 0.320 g
b. 7.50 g

8.) Which has the greater mass: 0.24 mol of aspirin or 45.0 g of aspirin (C₉H₈O₄)?

45.0 g of aspirin
0.24 mol of aspirin

9.)What is the mass in grams of 6.70 ×10²⁰molecules of the pain reliever ibuprofen (C₁₃H₁₈O₂, molar mass 206.3 g/mol)? Answer shouldbe provided in scientific notation.