C4

Question 1

Find the relative formular mass of MgCl2

Answer 1

95

Question 2

Find the parcentage mass of sodium in sodium carbonate Na2C03

Question 3

What does 1 mole of a substance represent?

Answer 3

Amount of that substance wich contains Avogadro’s number of particles (6.02x10^23) including atoms,ions or electrons

Question 4

_ ___ of atoms or molecules of a substance will have a ____ in grams ____ to the __

Answer 4

One mole of atoms or molecules of a substance will have a mss in grams equal to the Mr
Carmbon=Mr12=> 1 mole of carbon is 12g

Question 5

How many moles are there in 66g of carbon?

Answer 5