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What is a mole?

A mole is a measure of quantity, such that when you have a mole of something, you have 6.02 x 10 23 atoms/molecules of it. The number of atoms/molecules in a mole is called "Avogadro's Number" and ...
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Answered by Amy F. • Chemistry tutor
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What characteristic ion can denote the difference between an acid and an alkali and give an example?

For an acid the formation of a hydrogen ion denotes it as being acidic.HCL -> H+ + CL-Where as for an alkali the formation of a hydroxyl ion denotes is as being alkaliNAOH -> Na+ and OH-
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2NaNO3 --> 2NaNO2 + O2. When a sample of solid sodium nitrate was heated 96cm3 of gas was collected, calculate the mass of NaNO3 Decomposed

We know that the reaction is a 2:1 ratio as 2 moles of NaNO3 is used to form 1 mole of O2 so first we need to find the moles of the product produced SoVolume of gas (dm3)= number of moles x 24dm3Therefore vo...
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Answered by Sara Z. • Chemistry tutor
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What are the different factors that contribute to bonding?

Firstly, let's start off with the simplest type of bonding. Ionic bonding involves the transfer of electrons, usually from a metal (Sodium/Na) to a non-metal (Chlorine, Cl). This creates an attraction betwee...
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Answered by Viral M. • Chemistry tutor
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15g of Magnesium is burned, what mass of magnesium oxide is formed ?

Write out the equation when Magnesium is burned to produce Magnesium oxide: 2Mg + O2 > 2MgOMagnesium to Magnesium oxide is 1:12) Work out the number of moles present in 15g of Magnesium: Moles = Mass/Rela...
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Answered by Carlin R. • Chemistry tutor
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