Science Homework Help

1. One of the steps in the commercial process for converting ammonia to nitric acid is the conversion of NH3 to NO.

4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g)

In a certain experiment, 2.10 g of NH3 reacts with 3.44 g of O2.

How many grams of the excess reactant remains after the limiting reactant is completely consumed?

2. Epsom salts, a strong laxative used in veterinary medicine, is a hydrate, which means that a certain number of water molecules are included in the solid structure. The formula for Epsom salts can be written as MgSO4·x H2O, where x indicates the number of moles of H2O per mole of MgSO4. When 5.469 g of this hydrate is heated to 250°C, all the water of hydration is lost, leaving 2.671 g of MgSO4. What is the value of x? MAKE SURE IT IS IN THE CORRECT SIG DIG