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How many grams are in 12.3 moles of H20?

2 Answers

2 votes

Answer:

How many grams H2O in 1 mol? The answer is 18.01528. We assume you are converting between grams H2O and mole. You can view more details on each measurement unit: molecular weight of H2O or mol This compound is also known as Water or Dihydrogen Monoxide. The SI base unit for amount of substance is the mole. 1 grams H2O is equal to 0.055508435061792 mole. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between grams H2O and mole. Type in your own numbers in the form to convert the units!

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Convert grams

H2O

to moles

Quick conversion chart of grams H2O to mol

1 grams H2O to mol = 0.05551 mol

10 grams H2O to mol = 0.55508 mol

20 grams H2O to mol = 1.11017 mol

30 grams H2O to mol = 1.66525 mol

40 grams H2O to mol = 2.22034 mol

50 grams H2O to mol = 2.77542 mol

100 grams H2O to mol = 5.55084 mol

200 grams H2O to mol = 11.10169 mol

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You can do the reverse unit conversion from moles H2O to grams, or enter other units to convert below:

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Details on molecular weight calculations

In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together.

The atomic weights used on this site come from NIST, the National Institute of Standards and Technology. We use the most common isotopes. This is how to calculate molar mass (average molecular weight), which is based on isotropically weighted averages. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass.

If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100.

Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. These relative weights computed from the chemical equation are sometimes called equation weights.

Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance.

A common request on this site is to convert grams to moles. To complete this calculation, you have to know what substance you are trying to convert. The reason is that the molar mass of the substance affects the conversion. This site explains how to find molar mass.

Finding molar mass starts with units of grams per mole (g/mol). When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula.

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ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!

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User Marquette
by
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8 votes

Answer:


\boxed {\boxed {\sf 221.5845 \ grams \ of \ H_2O}}

Step-by-step explanation:

To convert from moles to grams, we must use the molar mass of water. This can be calculated using values on the Periodic Table. Look for hydrogen and oxygen.

  • H: 1.008 g/mol
  • O: 15.999 g/mol

Since the formula for water is H₂O, we must multiply hydrogen's molar mass by 2 then add oxygen's.

  • H₂O: 2(1.008 g/mol)+ 15.999 g/mol = 2.016 g/mol + 15.999 g/mol=18.015 g/mol

We can use this molar mass as a ratio.


\frac { 18.015 \ g \ H_2O} { 1 \ mol \ H_2O}

Multiply by the given number of moles: 12.3


12.3 \ mol \ H_2O *\frac { 18.015 \ g \ H_2O} { 1 \ mol \ H_2O}

The moles of water will cancel out.


12.3 *\frac { 18.015 \ g \ H_2O} { 1}


12.3 * { 18.015 \ g \ H_2O}


221.5845 \ g \ H_2O

There are 221.5845 grams of water in 12.3 moles.

User Taba
by
3.4k points