Mass number, atomic number, molar mass, mole concept, mole to mass vice versa and percentage composition pages 236 to 246

Question 1

What does the atomic number represent?

Answer 1

indicates number of protons present in the nucleus of an atom

Question 2

What does the mass number represent?

Answer 2

the sum of the numbers of protons and neutrons present in the nucleus of an atom

Question 3

If the compound is an ionic what mass is it?

Answer 3

Formula mass

Question 4

If the compound is covalent what mass is it?

Answer 4

Molecular mass

Question 5

What type of metal does a covalent contain?

Answer 5

Non metal + Non metal

Question 6

What type of metal does an Ionic contain?

Answer 6

Metal + Non metal

Question 7

Where is the Number of atoms based on?

Answer 7

Based on the chemical formula

Question 8

Where is the mass of the element based on?

Answer 8

based on the periodic table

Question 9

How to solve molar mass, molecular mass and formula mass?

Answer 9

Number of atoms x mass of the element

Question 10

What is (NH4)2 CO3 ?

Answer 10

subscripts

Question 11

What does 1 mole represent?

Answer 11

represents an atom of an element of molecule of compound +

Question 12

What is the formula for mole to grams?

Answer 12

mole multiply sum of the element

Question 13

What is the formula for grams to mole?

Answer 13

grams divided by sum of the element

Question 14

What is meant by percentage composition?

Answer 14

indicates the relative amount (by mass) of each elements present in a compound

Question 15

How is the composition of a known compound expressed?

Answer 15

By mass of the individual element in a relation to the total mass of the entire compound