114.818 grams

1 Answer

1. Convert the mass of the sample from milligrams to grams.
2. Convert the sample from grams to moles by using neon’s molar mass.
3. Convert the number of moles to number of atoms by using Avogadro’s numebr.

Avogadro’s Number and the Mole. The mole is represented by Avogadro’s number, which is 6.022×1023 atoms or molecules per mol.

5.00 moles

In order to convert the moles of a substance to grams, you will need to multiply the mole value of the substance by its molar mass.

Use the molecular formula to find the molar mass; to obtain the number of moles, divide the mass of compound by the molar mass of the compound expressed in grams.

The molar mass of a substance is the mass in grams of 1 mole of the substance. As shown in this video, we can obtain a substance’s molar mass by summing the molar masses of its component atoms. We can then use the calculated molar mass to convert between mass and number of moles of the substance.

It is equal to Avogadro’s number (NA), namely 6.022 x1023. If we have one mole of water, then we know that it will have a mass of 2 grams (for 2 moles of H atoms) + 16 grams (for one mole O atom) = 18 grams.

18.02 grams

Avogadro’s number, number of units in one mole of any substance (defined as its molecular weight in grams), equal to 6.02214076 × 1023. The units may be electrons, atoms, ions, or molecules, depending on the nature of the substance and the character of the reaction (if any). See alsoAvogadro’s law.

Avogadro’s number is a proportion that relates molar mass on an atomic scale to physical mass on a human scale. Avogadro’s number is defined as the number of elementary particles (molecules, atoms, compounds, etc.) per mole of a substance. It is equal to 6.022×1023 mol-1 and is expressed as the symbol NA.

16 g

20.8 gm

Fe2O3 is the chemical formula of Iron(III) oxide which has three oxygen atoms, two iron atoms.

For every mole of H2SO4 molecules, there are 4 moles of oxygen atoms, which has a molar mass of 16.00 g/mol (mass of the part): Now we just punch in the numbers and find: Now we can do the same for the other two compounds!

163.1 grams