Which pair of samples contains the same number of hydrogen atoms

two moles of NH3 and three moles of N2H4
two moles of NH3 and one mole of N2H4
four moles of NH3 and three moles of N2H4
one mole of NH3 and one mole of N2H4

h.bkjgh

To rephrase Damon's answer:

6 is not equal to 12.
6 is not equal to 4.
12 = 12
3 is not equal to 4.

To determine which samples contain the same number of hydrogen atoms, we need to compare the number of moles for each compound.

Let's start by calculating the number of hydrogen atoms in each sample:

1 mole of NH3 contains 3 hydrogen atoms.
1 mole of N2H4 contains 4 hydrogen atoms.

Now, let's compare the samples provided:

1) Two moles of NH3 and three moles of N2H4:
- NH3: 2 moles * 3 hydrogen atoms/mole = 6 hydrogen atoms
- N2H4: 3 moles * 4 hydrogen atoms/mole = 12 hydrogen atoms

In this case, the number of hydrogen atoms is different, so this pair of samples does not contain the same number of hydrogen atoms.

2) Two moles of NH3 and one mole of N2H4:
- NH3: 2 moles * 3 hydrogen atoms/mole = 6 hydrogen atoms
- N2H4: 1 mole * 4 hydrogen atoms/mole = 4 hydrogen atoms

In this case, the number of hydrogen atoms is different, so this pair of samples does not contain the same number of hydrogen atoms.

3) Four moles of NH3 and three moles of N2H4:
- NH3: 4 moles * 3 hydrogen atoms/mole = 12 hydrogen atoms
- N2H4: 3 moles * 4 hydrogen atoms/mole = 12 hydrogen atoms

In this case, the number of hydrogen atoms is the same (12 hydrogen atoms), so this pair of samples contains the same number of hydrogen atoms.

4) One mole of NH3 and one mole of N2H4:
- NH3: 1 mole * 3 hydrogen atoms/mole = 3 hydrogen atoms
- N2H4: 1 mole * 4 hydrogen atoms/mole = 4 hydrogen atoms

In this case, the number of hydrogen atoms is different, so this pair of samples does not contain the same number of hydrogen atoms.

So, the only pair of samples that contains the same number of hydrogen atoms is four moles of NH3 and three moles of N2H4.

6 + 12= 18

6 + 4 = 10
12+ 12 =24
3 + 4 = 7
beats me