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Chemistry
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Explain why DNA replication is considered semi-conservative.

DNA requires one template strand that is conserved, in order for the nitrogenous bases to order themselves correctly in the new polynucleotide chain. This relies on the complimentary base pairing C-G and ...

AG
4668 Views

Calculate the pH change when water is added to 25.0 ml of 0.250M NaOH to form a 1.00l solution.

The initial [-OH] is 0.250M since NaOH releases 1 mole of -OH per mole of base. Using Kw=[H+][-OH], [H+]=(110-14)/0.250=410-14M (note remember units). Hence the initial pH=-...

MS
Answered by Milind S. Chemistry tutor
15067 Views

How do catalysts speed up the rate of a reaction?

A catalyst increases the rate of the reaction because: 

  • They provide an alternative energy pathway that has a lower activation energy 

  • This means that more particles hav...

VO
Answered by Vanessa O. Chemistry tutor
31651 Views

Iron can be extracted from iron ore by reaction with carbon at very high temperature in a blast furnace. In this process Fe2O3 is reduced to Fe. Explain what is meant by the term reduction.

Reduction: loss of oxygen (or gain of electrons)

MT
Answered by Mark T. Chemistry tutor
4159 Views

Why does a higher temperature lead to a higher rate of reaction?

Heat is a form of energy - the more heat a particle has, the more energy it has, and so the faster it moves. This increases the number of collision is a set period of time, whilst also increasing the numb...

AC
Answered by Andreas C. Chemistry tutor
2034 Views

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