Question

What is the total mass of NO produced when 253 grams of copper react?
3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O

5.70 g

3.98 g

179 g

79.7 g


If you have 35.0g of Na and 100.0g of Cl2, what is the maximum amount of NaCl that you can produce?

2Na + Cl2 → 2NaCl

89.0 g

165 g

75.8g

57.7 g

Answer 1

79.7 I guess....because

The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon-12. When the mole is used, the elementary entities must be specified and may be atoms, molecules, ions, electrons, other particles, or specified groups of such particles.