[BumbleBee]

Hello,
Getting very confused with the following questions on the subject of moles.  There are a few questions.  If someone could explain I would be very grateful. 

1) If 28g of ethene is burnt, what mass of carbon dioxide is formed?

2) What mass of sodium hydroxide will exactly neutralize 2 moles of sulphuric acid

3) a)  Calculate the mass of copper(II) oxide that will react with 0.1 mol of hydrochloric acid.
    b) What mass of copper(II) chloride does this form?

Thanks anyone who comments and helps me

[billnotgatez]

forum rules require you show some of your work so we can help you
please read forum rules

[BumbleBee]

I am really sorry, I didn't see them before, I will post what I have done now

[BumbleBee]

My work so far:

1 mole of ethene is 28g.
1g=1/28 moles
28g=1/28 * 28

( next is the bit I don't understand)
Co2 = 12+32= 44g
44* 2= 88 g

1:2
1 mole to two moles

Now I just have no idea what to do? I got a bit confused between all the formulAe

The next question:
2NaOH + h2so4 goes to Na2sO4 + 2h2o

I think the ratio is 2:2
2* 40 =80.  I am not sure if this is correct.

The next question:
CuO + 2HCl goes to CuCl2 + H2O
CuO:CuCl2
1:1
0.05 moles: 0.1 mole

CuCl2= 63.5 + 71 = 134.5
134.5*0.05=6.725g


Once again, I am sorry for not reading the rules correctly

[Borek]

My work so far:

1 mole of ethene is 28g.
1g=1/28 moles
28g=1/28 * 28

( next is the bit I don't understand)
Co2 = 12+32= 44g
44* 2= 88 g

1:2
1 mole to two moles

Now I just have no idea what to do? I got a bit confused between all the formulAe

You are doing great so far.

You know molar mass of ethene is 28 g/mol.

You know molar mass of CO₂ is 44 g/mol.

How many moles of ethene were burnt?

If so, how many moles of carbon dioxide were produced?

What was their mass?

[BumbleBee]

28g is burning so 1 mole, this next carbon dioxide bit confuses me though

[Borek]

Look at the coefficients in the reaction equation. When one mole of ethene is burnt, how many moles of carbon dioxide are produced?

If you don't see it, please read

http://www.chembuddy.com/?left=balancing-stoichiometry&right=stoichiometric-calculations

[BumbleBee]

Would it be around 1.5 times because one mole of ethene is 28g and carbon dioxide 44g?

[DrCMS]

Would it be around 1.5 times because one mole of ethene is 28g and carbon dioxide 44g?

No that is wrong. 
1) Write out the reaction equation for ethene burning.
2) Balance this equation.

So how many moles of carbon dioxide are formed from each mole of ethene?