2 A brick has a mass of 4.0 kg and the Earth has a mass of 6.0 x 10
Use this information to answer the questions below. Be sure your answers have the correct number of significant digits.
What is the mass of 1 mole of bricks?

?
How many moles of bricks have a mass equal to the mass
of the Earth?

mass of 1mole of brick =  mass of 1 brick x avagadro number

= 4 kg x 6.022 x 10^23 bricks  = 2.4 x 10^24 kg

No. of moles of bricks have a mass equal to the mass of the earth

= mass of earth / mass of 1 mole of brick

= [ 6 x 10^27 ]  /  [ 2.4 x 10^24 ]

= 2.5 x 10^3

= 2500 moles

Explanation:

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

gas

explanation:

smoke is the matter of a gas