1. 2 NH3 + 3 CuO g 3 Cu + N2 + 3 H2O In the above equation how many grams of N2 can be made when 187 grams of CuO are consumed?

Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0

Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.:

Element / Molar Mass

Hydrogen 1

Nitrogen 14

Copper 63.5

Oxygen 16

2. Sodium chlorate decomposes into sodium chloride and oxygen gas as seen in the equation below.

­­2NaClO3­ --> 2NaCl +3O2

How many grams of NaClO3­ were needed to produce 9 grams of O2? Round your answer to the nearest whole number.

Round your answer to the whole number. If you answer is a whole number like 4, report the answer as 4.0

Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.:

Element / Molar Mass

Sodium 23

Chlorine 35.5

Copper 63.5

Oxygen 16

3. S + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2O

In the above equation how many grams of water can be made when 2 grams of HNO3 are consumed?

Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.:

Element / Molar Mass

Hydrogen 1

Nitrogen 14

Sulfur 32

Oxygen 16

4. For the reaction 2HNO3 + Mg(OH)2 → Mg(NO3) 2 + 2H2O, how many grams of magnesium nitrate are produced from 3 grams of nitric acid, HNO3 ?

Round your answer to the nearest tenth. Do not round your answers until the last step of the problem. If you do, the computer might mark your answer incorrect and you will be asked to complete your second trial for this assessment.

Use the following molar masses:

Element /Molar Mass
Hydrogen1
Magnesium24
Nitrogen14
Oxygen16

5. 3 Cu + 8HNO3 --> 3 Cu(NO3)2 + 2 NO + 4 H2O

In the above equation how many grams of water can be made when 8 grams of HNO3 are consumed?

Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0

Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.:

Element / Molar Mass

Hydrogen 1

Nitrogen 14

Copper 63.5

Oxygen 16

6. 2 NH3 + 3 CuO g 3 Cu + N2 + 3 H2O

In the above equation how many grams of N2 can be made when 111 grams of CuO are consumed?

Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0

Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.:

Element / Molar Mass

Hydrogen 1

Nitrogen 14

Copper 63.5

Oxygen 16

7. Element /Molar Mass
Hydrogen1
Magnesium24
Nitrogen14
Oxygen16

PLEASE HELP ASAP!!!