Isopropyl Alcohol (C3H8O) is the active ingredient in hand sanitizer. If I have 125 grams of Isopropyl Alcohol (C3H8O)...

b. How many Hydrogen atoms are present? (round answer to 1 decimal place)

There are 1*10^25 H atoms present

Explanation:

Step 1: data given

Mass of Isopropyl Alcohol (C3H8O) = 125 grams

Molar mass of Isopropyl Alcohol (C3H8O) = 60.1 g/mol

Number of Avogadro = 6.02 *10^23 /mol

Step 2: Calculate moles Isopropyl Alcohol

Calculate moles Isopropyl Alcohol = mass C3H8O / molar mass C3H8O

Calculate moles Isopropyl Alcohol = 125 grams / 60.1 g/mol

Calculate moles Isopropyl Alcohol = 2.08 moles

Step 3: Calculate moles of hydrogen

For 1 mol C3H8O we have 8 moles hydrogen

For 2.08 moles we have 8*2.08 = 16.64 moles hydrogen

Step 4: Calculate amount of hydrogen atoms

Hydorgen atoms = moles H * number of Avogadro

Hydrogen atoms = 16.64 moles * 6.02* 10^23 / mol

Hydorge, atoms = 1*10^25 H atoms

There are 1*10^25 H atoms present

you need to give more information

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

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