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# “Molecular Weight and the Mole” is the main subject of this unit conversion worksheet

Subjects:

Math, Science

Grades:

9, 10, 11, 12

Title – Unit Conversion Worksheet

By – John Brigham

Primary Subject - Science

Secondary Subjects – Math

Grade Level – 9 – 12

Name____________________________

Date___________________

### Unit Conversion Worksheet

- A baker has 350 lbs. of dough. He knows that each loaf of bread requires 3.5 lbs..
**How many loaves of bread will he get?** - A bricklayer has 125 lbs. of mortar. He knows that there are 2000 lbs. in a ton.
**How many tons does he have?** - A chemist has 62 grams of potassium. The chemist knows that the molecular weight of potassium is 31 grams per mole.
**How many moles of potassium does this represent?** - A chemist has 1 gram of hydrogen molecules. The molecular weight of hydrogen is 2 grams per mole.
**How many moles of hydrogen does the chemist have?** - A chemist has 1 gram of oxygen. The atomic weigh of oxygen is 16 grams per mole.
**How many moles of oxygen is this?** - A farmer harvests 2548 eggs from his chickens during the week. He knows that a dozen eggs consists of 12 eggs.
**How many dozen eggs does he have?** - A chemist has 7 x 10
^{ 24 }molecules of CH_{ 4 }. He knows that there are 6 x 10^{ 23 }molecules in a mole.**How many moles does he have?** - A chemist has 3 x 10
^{ 22 }molecules of oxygen. He knows that there are 6 x 10^{ 23 }molecules in a mole.**How many moles of oxygen does he have?** - A student combines 1 gram of H
_{ 2 }and one gram of O.**How many moles of H**_{ 2 }O is formed? How many moles of hydrogen is left over?

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