How many grams of CaSO_4 (calcium sulfate) are in 3.3 moles of CaSO_4? (The atom

Question

How many grams of CaSO_4 (calcium sulfate) are in 3.3 moles of CaSO_4? (The atomic masses are: Ca - 40, S - 32, O - 16) You are in a boat that uses four gallons of gas per hour, travels at six miles per hour and has ten gallons of gas. Can you make it across the lake to the other shore that is fourteen miles away? If you can, how long will it take? If you cannot, how much more gas would you need? A carpenter needs four 2"Times 10" boards, six 2" Times 4" boards and one pound of nails to make two tables. How many nails will he need to make four tables, if he has plenty of wood and there are 40 nails per pound? A cook makes a cake according to the following recipe: 4 eggs + 3 cups water + 1 cup oil + 1 cake mix rightarrow 1 cake How many cakes can she make with one quart of oil, assuming she has plenty of the other ingredients. You are planning to bake cakes for a bake sale. Your favorite recipe calls for 3 cups of flour, 4 eggs. 1 cup of butter, and a cup of milk. You have a dozen eggs, a pound of butter, 5 pounds of flour and a gallon of milk. How many cakes can you make? What information did you need to Google to be able to answer part a?

Explanation / Answer

6.

1 mole of CaSO4 = 136 g

3.3 moles of CaSO4 = 136 * 3.3 = 408 g

7.

4 galoons gas can travel 6 miles in 1 hour

14 miles requires 4/6 * 14 gallons

                                = 9.33 gallons

6 mile in 1 hour

14 miles in 1/6 * 14 = 2.33 hours

8.

for 2 tables 1 pound nails require

for 4 tables 2 ponunds of nails require

number of nails = 2*40 = 80 nails

9.

1 cup of oil make 1 cake

1 quart = 4 cups of oil can make 4 cakes

10.

4 eggs can make 1 recepie then

12 eggs can make 3 recepies

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