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What determines rate of reaction?

Rate of reaction is determined by the number of successful collisions between the reactants per second. A collision is successful if two particles collide with enough energy to react. This can be affected by...
CS
Answered by Charlie S. • Chemistry tutor
2916 Views

Why is the first ionisation energy lower in barium compared to calcium?

Barium has more electrons shells than calcium, so the nuclear shielding is stronger, and the outmost electrons are further away from the nucleus. This results in a weaker attractive force between the electro...
JF
Answered by Joseph F. • Chemistry tutor
17277 Views

The same mass of large, medium and small marbles where reacted separately with diluted HCl. This is and exothermic reaction. Will the rise in temperature for each reaction differ? If yes than why?

The smallest marbles will give the highest rise in temperature, than the medium and lastly the largest marbles will give the lovest rise in temperature. The smaller the beeds the larger the surface area that...
IR
Answered by Ines R. • Chemistry tutor
3306 Views

How can an explosion be explained by the different ways molecules are packed together in solids, liquids and gases?

a) Gases tend to occupy a much larger volume than solids and liquids, since intermolecular forces are much weaker. b) Explosives are very unstable molecules: in this context, unstable means “full of potentia...
RS
2975 Views

explain why there is a decrease in first ionisation energy between elements phosphorus and sulfur

The electrons are packed in singly occupied orbitals in the 3p subshell in phosphorus, however in sulfur, the 4th electron is placed into an orbital that already has an electron. Because electrons are negati...
SS
Answered by Sagar S. • Chemistry tutor
9969 Views