chemistry 3(paper1)

Define relative formula mass

The mass of all the compounds added together

What is the number for The mole?

6\.02X10^23

What is 1 mole of a chemical equal too?

It’s formula mass in grams

What is the equation for moles?

Mass/RAM

What is the theoretical yield equation?

2Mg+O2————> 2MgO

What is the equation for percentage yield?

Amount of product used/maximum amount of product possible

What might effect yield?

Product still has solvent

Not all reactants have reacted

Define atom economy

The amount of starting atoms that ends up as useful products

What is the equation for atom economy?

RFM of useful products/ Total RFM of products

Define concentration

How many moles are dissolved into a liquid

What is the unit for concentration?

1Dm*3 (= 1000cm*\*3)

What is the equation for concentration in g/dm\*3?

Mass of substance/ volume of solvent

What is the equation for concentration in mole/dm\*3?

Number of moles/ volume of solvent

Why would you use a pipettes in a titration?

It has a fixed volume so its accurate

Define molar volume

1 mole of gas at room temperature and room pressure (1 atom) occupies the volume of 24dm\*3