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What is the difference between exothermic and endothermic?

Exothermic and Endothermic are opposite reactions. All reactions need energy to be put in to start them off, this is called the activation energy, but th...

Answered by • Chemistry tutor

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Why does the structure of lithium oxide allow it to conduct electricity under certain conditions?

Lithium oxide has the formula Li₂O. It has an ionic structure as it is formed from a metal and a non-metal. It has lithium ions with a +1 charge, as lithium is found in Group 1 of the periodic ...

Answered by Amy I. • Chemistry tutor

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An industry is producing copper sulphate (CuSO4) from copper carbonate (CuCO3) and sulphuric acid (H2SO4). The company calculated that from 800 g of CuCO3 they will produce 1kg of CuSO4. However they only produced 900g. What is the percentage yield ?

The percentage yield is calculated in the following way: (Actual yield/Theoretical yield)*100 Here, the actual yield is 900g and the theoretical yield that the company calculated is 1kg. ...

Answered by Dora L. • Chemistry tutor

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In the reaction (SO₂ + 2H₂S → 3S + 2H₂O), 44.3g of SO₂ are mixed with 44.3g of H₂S. Calculate the maximum mass of sulfur that could be formed.

1. Check if the equation is balanced, luckily this one is! 2. Check if any unit conversions are needed. All masses are in grams, so no problem there. 3. Using (moles = mass ÷ Mr), calculate...

Answered by Kundai V. • Chemistry tutor

3057 Views

What is a mole?

A mole is a unit of amount of substance. One mole is the number of atoms of carbon in 12g of the carbon-12 isotope(when 12 is the relative atomic mass) , which is 6.02 x 10²³ . This means that...

Answered by Hunter G. • Chemistry tutor

3737 Views