Can someone help me with some Chemistry word problems?

Question

Can someone also show me step-by step how to solve them.

 

1) Silver chloride (AgCl), used in silver plating, contains 75.27% Ag by mass. Calculate the mass of AgCl, in grams required to make 4.8 g of silver plating.

 

2) Analysis of a soda pop can indicates 18% sugar by mass 54 grams of sugar total. What is the total mass of soda water in the can?

 

3) Calculate the mass percent Fe in the iron ore Fe3O4 (magnetite).

 

4) The recommended daily intake of calcium for adult men and pre-menopausal women is 1000 mg/day. Calcium citrate, Ca3(C6H5O7)2 is commonly used as a dietary supplement.

 

- What is the molar mass of calcium citrate?

-What mass (in g) of calcium citrate would be needed to provide the recommended daily intake of calcium? 

 

5) The density of silver (Ag) is 10.2 g/cm^3.

 

-What is the volume in cm^3, of silver that contains 4.25x10^23 atoms of silver?

-How many atoms of Ag are present in a cube with a total volume of 12.4 cm^3?

 

6) A drop of water has a volume of approximately 0.05 mL. How many water molecules does it contain? The density of water is 1.0 g/cm^3. 

Answer 1