# DR.BOB HELP CHEMISTRY!

posted by .

How many milliliters of a 0.3 molar HCl
solution are needed to react completely with
8 grams of zinc according to the following
equation?
? HCl + ? Zn → ? ZnCl2 + ? H2

• DR.BOB HELP CHEMISTRY! -

First, you need to balance the equation. Can you do that?

You will need two moles of HCl per mole of zinc.

How many moles of zinc is 8 grams?

• DR.BOB HELP CHEMISTRY! -

I balanced it and got:

2HCL + Zn ---> ZnCl2 + H2

And then to find moles I did: 8/65.37 and got 0.1124 moles.

But now I'm stuck, what do I do next?

• DR.BOB HELP CHEMISTRY! -

You are doing fine so far.

You need 2*0.1124 = 0.2248 moles of HCl.

One liter of the solution contains 0.3 moles of HCl.

You need a bit less than a liter of the acid solution.

• DR.BOB HELP CHEMISTRY! -

Okay, so would I divide 0.3 by 0.2248? >_> I'm sorry, my chemistry is my weakest subject. :(

• DR.BOB HELP CHEMISTRY! -

No, you need less than a liter.

## Similar Questions

1. ### science

How many grams of hydrochloric acid are required to react completely with 4.30g of zinc?
2. ### chemistry

how many mililiters of a 0.27 M HCl solution are needed to react completely with 2.7 g of zinc to form zinc (II) chloride?
3. ### Science

how many mililiters of a 0.4 molar HCl solution are needed to react completely with 13 grams of zinc according to the following equation?
4. ### Chemistry

how many mililiters of a 0.4 molar HCl solution are needed to react completely with 13 grams of zinc according to the following equation?
5. ### Ap Chem

how many milliliters of a 0.9 molar HCl solution are needed to react completely with 12 grams of zinc according to the following equation 2HCl+ Zn yields ZnCl2+ H2
6. ### chemistry

How many milliliters of a 0.5 molar HCl solution are needed to react completely with 11 grams of zinc according to the following equation?
7. ### chemistry

How many milliliters of a 0.5 molar HCl solution are needed to react completely with 15 grams of zinc according to the following equation?
8. ### chemistry

How many milliliters of a 0.5 molar HCl solution are needed to react completely with 15 grams of zinc according to the following equation?
9. ### chemistry

The UNBALANCED equation is: Zn + HCl –] ZnCl2 + H2 How many milliliters of a 0.48 M HCl solution are needed to react completely with 7.4 g of zinc to form zinc(II) chloride?
10. ### Chemistry

How many milliliters of a 0.48 M HCl solution are needed to react completely with 7.4 g of zinc to form zinc(II) chloride?

More Similar Questions