To prepare for a laboratory?

Chemistry

1 answer:

yKpoI14uk [10]4 years ago

6 0

Answer:

You have to prepare for the lab (Materials, work, paper etc.)

Set up the lab know where the lab will be taking place

Read thru the experiment before doing the lab

Make a hypothesis

Write down notes, observations, measures anything important to help with the lab!

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Calculate the number of moles in 79.17 g of magnesium chloride

natulia [17]

There would be 0.8315 moles

7 0

3 years ago

If 1.85 g Al reacts with an excess copper(II) sulphate and the percentage yield of Cu is 56.6%, what mass of Cu is produced

timofeeve [1]

We have a balanced equation:
2 Al+ 3 CuSO4 ⇒ Al2(SO4)3+ 3 Cu

1.85 g Al* (1 mol Al/ 26.98 g Al)* (3 mol Cu/ 2 mol Al)* ( 63.55 g Cu/ 1 mol Cu)= 6.54 g Cu.
(Note that the units cancel out so you get the answer)

6.54 g Cu* (56.6/100)= 3.70 g Cu.

The final answer is 3.70 g Cu~

7 0

4 years ago

Read 2 more answers

The mole fraction of he in a gaseous solution prepared from 4.0 g of he, 6.5 g of ar, and 10.0 g of ne is __________.

solniwko [45]

Given that there is 4.0 g of He, 6.5 g of Ar, and 10.0 g of Ne :

So, first all these masses are converted into moles:

$Numer of moles= \frac{Given mass}{Molar mass}$