(1) What mass of potassium nitride is produced from 1.75 moles of potassium metal?
(2) What mass of calcium hydroxide is needed to produce 170.0g of calcium chloride when aqueous hydrochloric acid is added to aqueous calcium hydroxide?
(3) What volume of hydrogen gas is needed to produce 35.00g of ammonia, NH3?
(4) What mass of aluminum chloride is produced when 50.0g of aluminum chlorate is heated?

Question

(1) What mass of potassium nitride is produced from 1.75 moles of potassium metal?
(2) What mass of calcium hydroxide is needed to produce 170.0g of calcium chloride when aqueous hydrochloric acid is added to aqueous calcium hydroxide?
(3) What volume of hydrogen gas is needed to produce 35.00g of ammonia, NH3?
(4) What mass of aluminum chloride is produced when 50.0g of aluminum chlorate is heated?

wolfe8 · Answer

You will need the chemical equations for all of those.

anonymous · Answer

Yes. I know that much, it is just that i don't understand how to do them after that.
Can we do #1 first? It's chemical equation is (6)K + N2 ---> (2)K3N [The numbers in parenthesis are coefficients to balance and the others are subscripts]. @wolfe8

wolfe8 · Answer

Yup. So you have the moles of K to be 1.75 From the equation, you see that K and K3N have the ratio 6:2 so 1.75 is 6 and you want 2. Makes sense?

anonymous · Answer

Yes

wolfe8 · Answer

So then what would you do to get 2/6 parts of 1.75?