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# Hi, help with the following would be appreciated: 1. One mole

Hi, help with the following...
Hi, help with the following would be appreciated:
1. One mole of carbon dioxide has a volume of 24 dm3 at room temp and pressure.
A reaction makes 33 600 dm3 of carbon dioxide at room temperature and pressure, how many moles of carbon dioxide are made?

2. One mole of oxygen molecules occupy a volume of 24 dm3 at room temp and pressure.
-0.0025 moles of oxygen are made in an experiment, calculate the volume that 0.0025 moles of oxygen molecules occupy at room temp and pressure:

Number of moles = mass (g) ÷ molar mass (RFM)

How many moles are present in 34 grams of Cu(OH)2?

2. How much carbon dioxide is made, in grams, when 88g of propane is burned in oxygen?

C3H8 + 5O2 ---> 3CO2 + 4H2O

3. In the same reaction, how much water is made when 160g of oxygen is used to burn propane?
Number of moles = concentration x volume

You carry out a titration to neutralise sulphuric acid using:
• 25.0 cm3 of dilute sulphuric acid in the beaker
• sodium hydroxide solution of concentration 0.100 mol / dm3 in the burette.

The hydrochloric acid is exactly neutralised by 20.0 cm3 of this sodium hydroxide solution.
Look at the balanced symbol equation for the reaction.
NaOH + H2SO4  Na2SO4 + H2O
Calculate
The number of moles of sodium hydroxide in 20.0 cm3 of a
0.100 mol /dm3 solution
b) The number of moles of sulphuric acid that reacted with this
amount of sodium hydroxide
c) The concentration, in mol / dm3, of the sulphuric acid.
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6/13/2012
akch2002, Engineer
Category: Homework
Satisfied Customers: 3,134
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Customer reply replied 5 years ago
Really needed within the next half an hour. I thought the replies would be almost instant!
I hope you want answers only. Kindly inform.
Customer reply replied 5 years ago
Actually need help to understand the workings as well

Here are answers marked in dark below each question. I will give working in next 30 minutes.

1. One mole of carbon dioxide has a volume of 24 dm3 at room temp and pressure.
A reaction makes 33 600 dm3 of carbon dioxide at room temperature and pressure, how many moles of carbon dioxide are made?

33600/24=1400 moles

2. One mole of oxygen molecules occupy a volume of 24 dm3 at room temp and pressure.
-0.0025 moles of oxygen are made in an experiment, calculate the volume that 0.0025 moles of oxygen molecules occupy at room temp and pressure:

24*0.0025 = 0.06dm^3

Number of moles = mass (g) ÷ molar mass (RFM)

How many moles are present in 34 grams of Cu(OH)2?

34/97.5 = 0.3487 moles

2. How much carbon dioxide is made, in grams, when 88g of propane is burned in oxygen?

C3H8 + 5O2 ---> 3CO2 + 4H2O

264 gms

3. In the same reaction, how much water is made when 160g of oxygen is used to burn propane?

72 gms
Number of moles = concentration x volume

You carry out a titration to neutralise sulphuric acid using:
• 25.0 cm3 of dilute sulphuric acid in the beaker
• sodium hydroxide solution of concentration 0.100 mol / dm3 in the burette.

The hydrochloric acid is exactly neutralised by 20.0 cm3 of this sodium hydroxide solution.
Look at the balanced symbol equation for the reaction.
Na2SO4 + H2OàNaOH + H2SO4
Calculate
The number of moles of sodium hydroxide in 20.0 cm3 of a
0.100 mol /dm3 solution

0.002 moles
b) The number of moles of sulphuric acid that reacted with this
amount of sodium hydroxide

0.001 moles
c) The concentration, in mol / dm3, of the sulphuric acid.

0.04 moles per dm^3

Kindly give rating to these answers. BONUS and POSITIVE feedback will be appreciated.

Customer reply replied 5 years ago
Thanks but could you give a step by step breakdown of the last two questions as shown below:

b) The number of moles of sulphuric acid that reacted with this
amount of sodium hydroxide
0.001 moles
c) The concentration, in mol / dm3, of the sulphuric acid.
0.04 moles per dm^3

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