Top answers

What is an isotope?

Atoms of the same element with different numbers of neutrons
BS
Answered by Bella S. • Chemistry tutor
2653 Views

How many moles are in 6g of carbon?

moles = mass/mrn = 6/12n= 0.5
LO
Answered by Lucy O. • Chemistry tutor
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Describe a simple way to distinguish between aqueous solutions of potassium nitrate (KNO3) and potassium sulfate (K2SO4) using one test tube reaction

Add one of the following: barium chloride, barium hydroxide, barium nitrateObservation with potassium nitrate: colourless solution/ or no visible change or reaction) Observation with potassium sulfate: white...
RS
Answered by Rebecca S. • Chemistry tutor
10649 Views

What is Ionisation Energy and the three factors that affect it? 2)State and explain the general trend in first ionisation energies for the Period 3 elements.

Ionisation energy is the energy required to remove 1 mole of electrons from each atom in 1 mole of gaseous atoms to form 1 mole of gaseous ions .For example,O (g) → O + (g) + e - The three factors that affec...
KR
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The formation of ammonia is an equilibrium reaction; N2(g) + 3 H2(g) <--> 2 NH3(g) the enthalpy of this reaction is negative. What can be done to increase the yield of products?

Using le Chatelier's principle that when a change occurs in a system at equilibrium the system will counteract the change to establish a new equilibrium we can answer this question. If the pressure is increa...
TD
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