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Chemistry
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What is a mole?

A mole is a unit of measurement for the amount of a substance. One mole is 6.02 x 10^23 particles in a substance, known as Avogadro's constant. This is because this is the number of atoms in  <...

LM
Answered by Liam M. Chemistry tutor
3368 Views

Proteins are an important part of a healthy diet because they provide essential amino acids. (a) State what is meant by an essential amino acid.

 There are 20 amino acids, and they can be classified as essential or non-essential – if they are non-essential they can be synthesised by the human body...

DC
Answered by Darragh C. Chemistry tutor
3329 Views

The recommended daily allowance of methionine for an adult is 15 mg per kg of body mass. Tuna contains 755 mg of methionine per 100 g portion. Calculate the mass, in grams, of tuna that would provide the RDA of methionine for a 60 kg adult.

15mg per kilo recommended dose 15x60 = 900mg recommended dose for a 60kg adult There is 755mg per 100g portion of tuna So 900/755 = 1.19 times the amount in 100g of tuna is the recommended dose 1.19 x 100...

DC
Answered by Darragh C. Chemistry tutor
5171 Views

I don't understand what exactly a mole is, could you please explain it to me?

Basicallly a mole refers to a number, in the same way as a dozen also refers to a number, this number being 12. Except instead of 12, the word mole refers to the number of 6 x 1023, which is...

AP
Answered by Andrea P. Chemistry tutor
3606 Views

What is a mole?

A mole is a unit for amount of substance.

This unit was created because we needed a common unit which could be used to convert from eg. number of atoms/molecules to grams or concentration...

DB
2191 Views

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