Question

Calculate if you had 2.0158 grams of hydrogen . How many moles of hydrogen do you have? How many moles of oxygen would react with this much hydrogen?

Answer 1

(1 mol=2.02g)=1.00 mol H2

Answer 2

(1 mol=2.02g)=1.00 mol H2
\(\color{#0cbb34}{\text{Originally Posted by}}\) @KIllerwolf
(1 mol=2.02g)=1.00 mol H2
\(\color{#0cbb34}{\text{End of Quote}}\)

Answer 3

you still need help?

Answer 4

It's been more than a week since OP logged in so I'll just complete the question-

If oxygen is reacting with hydrogen, our chemical reaction is

\( 2\text{H}_2 + \text{O}_2 \to 2\text{H}_2\text{O}\)

We are given grams. We have to convert it to moles by using the molar mass.

To find the molar mass, you have to pull out the periodic table. If you look in the top left corner, you will find hydrogen listed with its atomic weight of 1.008.

We have \(\text{H}_2\) which means we have TWO hydrogen atoms. The molar mass of \(\text{H}_2\) would be 2* 1.008 = 2.016

The molar mass tells us that 2.016 grams of \(\text{H}_2\) is 1 mole.

To convert from grams to mole:

\(x ~\text{grams H}_2 \times \dfrac{\text{1 mole H}_2}{\text{2.016 grams H}_2}\)

So just replace x with the number given of grams given to you in your question.

Answer 5

Finally, to find the number of moles of oxygen needed to react with \(\text{H}_2\), you need to keep in mind that the chemical reaction works in a molar ratio. This means that we need 2 moles of \(\text{H}_2\) for every 1 mole of \(\text{O}_2\).

Once you find how many moles of \(\text{H}_2\) we have, use the 2:1 mole ratio to calculate how many moles of \(\text{O}_2\) would react.