1) 1. How many ATOMS ofsulfur are present in 4.30 molesof sulfur dioxide ?
atoms of sulfur.


2. How many MOLES ofoxygen are present in1.91×10²² molecules of sulfurdioxide ?
moles of oxygen.

2) 1. How many MOLECULES ofcarbon tetrafluoride are present in1.45 moles of this compound ?
molecules.


2. How many MOLES ofcarbon tetrafluoride are present in1.07×10²³ molecules of this compound?
moles.

3) 1. How many MOLECULES ofphosphorus triiodide are present in2.80 moles of this compound ?
molecules.


2. How many MOLES ofphosphorus triiodide are present in1.08×10²³molecules of this compound?
moles.

3) 1. How many ATOMS ofsulfur are present in 8.41 gramsof sulfur dioxide?  atoms ofsulfur .


2. How many GRAMS ofoxygen are present in1.91×10²² molecules of sulfurdioxide ?  grams of oxygen

4) 1. How manyMOLECULES of carbon tetrafluorideare present in 1.91 grams of this compound?  molecules.


2. How many GRAMS ofcarbon tetrafluoride are present in1.07×10²³ molecules of this compound?  grams.

5) 1. How many MOLECULES ofphosphorus triiodide are present in4.98 grams of this compound?  molecules.


2. How many GRAMS ofphosphorus triiodide are present in1.08×10²³molecules of this compound?  grams.

6)
What is the mass of a sulfur dioxide molecule?
grams

7)What is the mass of a carbon tetrafluoridemolecule ?
grams

8)What is the mass of a phosphorus triiodidemolecule ?
grams

9)1. How many GRAMS ofsulfur are present in 4.30 gramsof sulfur dioxide ?
grams sulfur.


2. How many GRAMS ofsulfur dioxide can be produced from1.69 grams ofoxygen ?
grams sulfur dioxide.

10)1. How many GRAMS ofcobalt(II) are present in 1.36grams of cobalt(II) sulfite ?
grams cobalt(II).


2. How many GRAMS ofcobalt(II) sulfite can be made from4.90 grams ofcobalt(II) ?
grams cobalt(II) sulfite.

11)1. How many GRAMS ofchromium(II) are present in 2.74grams ofchromium(II) chloride ?
grams chromium(II).


2. How many GRAMS ofchromium(II) chloride can be made from4.92 grams ofchromium(II) ?
grams chromium(II) chloride.