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Chemistry
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Relationship between moles and Avogadro's constant

Moles equation is moles= mass/RFM Avogadro's constant is 6.x 1023. 

1 mole means 6x 1023 atoms/molecules. 

e.g. 2 mole of Cu weighs 128g. What is the weight of 1 Cu ato...

JJ
Answered by Joshny J. • Chemistry tutor
11822 Views

What is the % yield if 12g of magnesium is dissolved in hydrochloric acid to produce 20g of magnesium chloride?

First we need to write the balanced equation for the reaction. In this case it is Mg + 2HCl -> MgCl2 + H2. Now we need to work out the maximum theoretical yield of MgCl2

HW
Answered by Holly W. • Chemistry tutor
7308 Views

With reference to valencies, describe and explain the differences in reaction as you go down group 1 of the periodic table for the reaction: metal + water -> Metal hydroxide + hydrogen.

As you descend the group, the reactions become more vigorous, more exothermic and have a higher rate of reaction. Lithium will just gently fizz and produce a gas, sodium will melt into a ball shape and fi...

GN
Answered by George N. • Chemistry tutor
2717 Views

Explain why an atom has no overall charge

As the number of negatively charged electrons is equal to the number of  positively charged protons, therefore the overall charge is zero

EB
Answered by Ethan B. • Chemistry tutor
3078 Views

Why is methylamine a stronger base than phenylamine?

Methylamine is CH3NH2, and phenylamine is C6H5NH2.

In methylamine, the methyl group exerts a positive inductive effect on the nitrogen atom in...

MW
Answered by Matthew W. • Chemistry tutor
18521 Views

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