Question

Glucose has the molecular formula C6H12O6. Calculate the: (a) it’s molecular mass (b) The number of atoms in one molecule of glucose. (c) The number of gram molecule in 18g of glucose *​

Answer 1

Answer:

1..MOLECULAR FORMULA OF GLUCOSE

C6H12O6

mass of 1 carbon atom = 12 g

6 *12 = 72g

mass of 1 hydrogen atom = 1g

12*1 = 12g

mass of 1 oxygen atom = 16g

16*6 = 96

for molecular mass of glucose

72 + 12 + 96 = 180g

2. number of atoms = weight of glucose/ molecular mass of glucose

$weight \: of \: substance \: \div molecuar \: mass \: of \: substance$

number of atoms = 1.8g/ 180g

number of atoms = 0.01mol

3. number of molecules in 18g of glucose is

given weight / molecular mass

18 / 180 = 0.1