Question

really need help catching up!! Please help! Ill give medals!!


If 2 molecules of one reactant combine with 5 molecules of another to produce 3 molecules of a product, then which of the following is the correct representation of the reaction?
(Points : 3)
2A + 5B 3C

2A + 3B 5C

A2 + B3 C5

A2 + B5 C3


Question 2. 2. If a sample of nitrogen gas (N2) contains 3.0 × 1024 atoms of nitrogen, then about how many moles of nitrogen gas are in the sample?
(Points : 3)
1.0

2.5

3.0

5.0