Chemical Formulas and Molar Mass

This video tutorial explains how to convert atoms to grams using Avogadro's number and molar mass. It provides step-by-step examples for different elements, including sodium, chromium, phosphorus, chlorine, and oxygen, demonstrating the conversion process and calculations involved. The tutorial also covers more complex conversions involving molecules and compounds, such as P4 and carbon tetrachloride, and concludes with a challenging example of converting oxygen atoms to milligrams of tin phosphate.

What is the first step in converting atoms to grams?

• Convert atoms to moles using Avogadro's number

• Find the atomic number

• Calculate the density

• Convert grams to moles

How many atoms are in one mole of a substance according to Avogadro's number?

• 9.8 x 10^20

• 1.0 x 10^6

• 3.7 x 10^24

• 6.022 x 10^23

What is the molar mass of chromium used in the example?

• 52 grams per mole

• 100 grams per mole

• 23 grams per mole

• 30 grams per mole

In the phosphorus example, how many atoms of phosphorus are in one molecule of P4?

• One

• Two

• Four

• Three

What additional step is needed when converting atoms of phosphorus to grams of P4?

• Divide by the number of atoms in a molecule

• Multiply by the atomic number

• Add the atomic masses

• Subtract the atomic number

What is the chemical formula for carbon tetrachloride?

• C2H6

• CCl4

• CH4

• CO2

How many chlorine atoms are in one molecule of carbon tetrachloride?

• Three

• Four

• One

• Two

What is the molar mass of tin(IV) phosphate calculated in the example?

• 735.98 grams per mole

• 52 grams per mole

• 123.88 grams per mole

• 153.81 grams per mole

How many oxygen atoms are in one formula unit of tin(IV) phosphate?

• Twelve

• Sixteen

• Eight

• Four

What is the final unit of measurement for the mass of tin(IV) phosphate in the example?

• Milligrams

• Kilograms

• Micrograms

• Grams