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Chemical Calculation 1

Authored by SAMANTHA CHEW

Chemistry

10th Grade

Used 30+ times

Chemical Calculation 1
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10 questions

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1.

MULTIPLE CHOICE QUESTION

15 mins • 5 pts

Which of the following statements regarding the mole is INCORRECT?

A mole is a unit of quantity equal to 6.02 x 1023 particles.

The number of particles in a mole is known as Avogadro’s number.

1 mole of O2 molecules means there are 6.02 x 1023 O2 molecules

1 mole of O2 molecules means there are 6.02 x 1023 O atoms of oxygen

2.

MULTIPLE CHOICE QUESTION

15 mins • 5 pts

The mass of one mole of an element is equal to

its atomic number from the periodic table, but in amus.

its atomic mass from the periodic table, but in kilograms

its atomic mass from the periodic table, but in grams.

its atomic number from the periodic table, but in grams.

3.

MULTIPLE CHOICE QUESTION

15 mins • 5 pts

What is the molar mass of PbSO4?

303 g/mol

255 g/mol

163 g/mol

372 g/mol

4.

MULTIPLE CHOICE QUESTION

15 mins • 5 pts

Determine the mass of 4.20 moles of C6H12

352.8 g

0.0499 g

337 g

2.53 x 1024 g

5.

MULTIPLE CHOICE QUESTION

15 mins • 5 pts

Media Image

Calculate the number of atoms in 0.0340 g Zn. [Ar of Zn is 65]

Help: You need to find how many mole of Zn there are first.

5.20 x 10-4 atoms Zn

3.13 x 1023 atoms Zn

3.15 x 1020 atoms Zn

2.05 x 1022 atoms Zn

6.

MULTIPLE CHOICE QUESTION

15 mins • 5 pts

How many grams are in 1.2 moles of neon?

0.059 grams

7.2 x 1023 grams

2.0 x 10-24 grams

24 grams

7.

MULTIPLE CHOICE QUESTION

15 mins • 5 pts

What is the molar mass of table salt (NaCl)? Read all options! Be careful!

58.44 amu

35.45 g/mol

22.99 g/mol

58.5 g/mol

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