How many nitrogen atoms are there in 5 molecules of N2H4

Hint: The symbol for nitrogen is N

10

In one molecule of N2H4 (Hydrazine), there are two nitrogen atoms.

So, to find how many there are in five molecules, multiply by five.

2 x 5 = 10

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles