Chemistry questions help!

Could anyone please help me with the following questions?

1) If glucose has the following formula C6H12O6, calculate its molecular weight.

2) What is a mole?

3) Define a 1M (one molar) solution of glucose

4) What weight of glucose should be weighed out to prepare:
i. 1l (1 litre) of this solution?
ii. 100ml (100 millilitres) of this solution?

5) Define a 0.15M (0.15 molar) or 150mM (150 millimolar) solution of glucose

6) What weight of glucose should be weighed out to prepare:
i. 1l (1 litre) of this solution?
ii. 250ml (250 millilitres) of this solution?

Thinking of this another way:

7) How many moles of glucose would be present in:
1l (1 litre) of a 1mM (1 millimolar) solution?
250ml (250 millilitres) of a 1mM (1 millimolar) solution?

8) Calculate the actual weight of glucose in these solutions:
1l (1 litre) of a 5 micromolar solution
100ml (100 millilitres) of a 5 micromolar solution

9) How would you prepare a solution of 280mM glucose which could be used to treat a dehydrated baby in an emergency?

10) What would be 280mM glucose be expressed as g/l?

11)What would be 280mM glucose be expressed as a % solution?

Reply 1

Cate

1

This looks suspiciously like your whole set of homework :rolleyes:

So I'll point out the obvious about the first one and hope you figure out the rest yourself, or you never learn anything.
You caluculate the molecular weight of a molecule by adding the masses of all the atoms in the molecule.

Reply 2

Natmarjus

11

Cate

This looks suspiciously like your whole set of homework :rolleyes:

So I'll point out the obvious about the first one and hope you figure out the rest yourself, or you never learn anything.
You caluculate the molecular weight of a molecule by adding the masses of all the atoms in the molecule.

pmsl

Reply 3

Dhesi

2

I agree you need to attempt it all on your own, its the best way to learn rather than others telling you the answers.

Reply 4

random123

2

Natmarjus

pmsl

Sorry I just have to ask, what does pmsl mean?

Reply 5

Dekota

kummy

1) If glucose has the following formula C6H12O6, calculate its molecular weight.

C = 12, H = 1, 0 = 16

Mr (C6H12O6) = 6(12) + 12 + 6(16) = 180
--------------

kummy

3) Define a 1M (one molar) solution of glucose

180g of glucose (C6H12O6)

Reply 6

AlphaNumeric

10

Ricki

180g of glucose (C6H12O6)

It doesn't ask for a mole of glucose, it asks about a solution with 1 molar concentration.

Joe_87

Sorry I just have to ask, what does pmsl mean?

pissing myself laughing

kummy

2) What is a mole?

Without trying to be too rude, if you're asking us all those questions about moles, you've clearly been in lessons where the teacher has explained what a mole is. Infact, I 100% gaurentee it'll be defined in your textbook, and that Google could find you hundreds of pages defining it in about 0.43 seconds.