# Edexcel AS Chemistry - Moles

A quiz on moles, percentage yield, atom economy and ionic equations

• Created by: Sophie
• Created on: 03-01-12 14:46
28 tonnes of ethene (rmm 28) produces 43.7 tonnes of ethanol (rmm 46) in the equation: C2H4 + H2O --> C2H5OH. What is the percentage yield?
95%
1 of 6
An organic compoun contains 38.4% Carbon, 4.8% Hydrogen and 56.8% Chlorine. What is the empirical formula?
C2H3Cl
2 of 6
Using the equation: 2 H2O2 ---> 2 H2O + O2. What mass of hydrogen peroxide is required to give 8g of oxygen gas?
17g
3 of 6
In what order are the best steps taken to produce dry crystals from a solution?
Filter, Boil to half volume, Cool and Crystalise, Pad dry
4 of 6
In an experiment, a student obtained 4.78g. Therotically, the student should of obtained 5.29g. what is the percentage yield?
90.8%
5 of 6
Why is atom economy important to industry?
They want a high atom economy for a high profit
6 of 6

## Other cards in this set

### Card 2

#### Front

An organic compoun contains 38.4% Carbon, 4.8% Hydrogen and 56.8% Chlorine. What is the empirical formula?

C2H3Cl

### Card 3

#### Front

Using the equation: 2 H2O2 ---> 2 H2O + O2. What mass of hydrogen peroxide is required to give 8g of oxygen gas?

### Card 4

#### Front

In what order are the best steps taken to produce dry crystals from a solution?

### Card 5

#### Front

In an experiment, a student obtained 4.78g. Therotically, the student should of obtained 5.29g. what is the percentage yield?