How many moles of molecules are there in 250 grams of hydrogen nitrate?
hydrogen nitrate is nitric acid, HNO3. The molecular weight (also called the molar mass) is 1 + 14 + (3x16) = 63 g per mole. (63.016 if you want to be more exact.) You have to look up the atomic weights of the atoms to get the "exact" value. H, N and O all have close to integer values for atomic weight.
250 g is 250/63 = ___ moles
Deez nuts in your mom!!!
To determine the number of moles of molecules in a given amount of a substance, you need to use the concept of molar mass.
First, let's find the molar mass of hydrogen nitrate (HNO3).
Hydrogen nitrate consists of one hydrogen atom (H), one nitrogen atom (N), and three oxygen atoms (O). The atomic masses of these atoms are:
H: 1.008 g/mol
N: 14.01 g/mol
O: 16.00 g/mol
To calculate the molar mass of hydrogen nitrate, you add up the atomic masses of all the atoms in one molecule of HNO3:
(1 * 1.008 g/mol) + (1 * 14.01 g/mol) + (3 * 16.00 g/mol) = 63.02 g/mol
So the molar mass of hydrogen nitrate is 63.02 g/mol.
Now, let's calculate the number of moles of molecules in 250 grams of hydrogen nitrate.
Number of moles = Mass of substance / Molar mass
Number of moles = 250 g / 63.02 g/mol
Number of moles = 3.97 mol (rounded to two decimal places)
Therefore, there are approximately 3.97 moles of molecules in 250 grams of hydrogen nitrate.