2.1.2-Compounds,formulae and equations

Question 1

formula of ammonium

Answer 1

NH4+

Question 2

hydride

Answer 2

OH-

Question 3

Oxide

Answer 3

O2-

Question 4

Sulfide

Answer 4

S2-

Question 5

Nitride

Answer 5

N3-

Question 6

hydroxide

Answer 6

OH-

Question 7

Phosphate

Answer 7

PO4 3-

Question 8

Carbonate

Answer 8

CO3 2-

Question 9

Sulfate

Answer 9

SO4 2-

Question 10

carbon monoxide

Answer 10

CO

Question 11

Ammonia

Answer 11

NH3

Question 12

Sulfur trioxide

Answer 12

SO

Question 13

Sulfur dioxide

Answer 13

SO3

Question 14

Nitrogen monoxide

Answer 14

NO

Question 15

Nitric acid

Answer 15

HNO3

Question 15

Sulfuric acid

Answer 15

H2SO4

Question 15

Phosphoric acid

Answer 15

H3PO4

Question 16

Which elements are diatomic

Answer 16

group 7

Question 18

polyatomic

Answer 18

elements combined

Question 19

molecular formula

Answer 19

actual number of atoms of each element in a compound

Question 20

empirical formula

Answer 20

simplest ratio of atoms of each element in a compound

Question 21

write the empirical formula of ethanoic acid

Answer 21

-empitical formula means simplest ratio
-CH3 COOH
-C2 H4 O2
-empirical formula-CH2O

Question 22

what to remember in composition

Answer 22

-if any of elements are diatomic including hydrogen

Question 23

binary compounds

Answer 23

contain 2 elements only

Question 24

atom economy definition

Answer 24

measure of how well atoms have beeen utilised

Question 25

chlorate

Answer 25

ClO3 -

Question 26

Chlorite

Answer 26

ClO2 -

Question 27

dense

Answer 27

how closely compacted in a substance
close means more dense

Question 28

Suggest three reasons why theoretical yield may be less than expected

Answer 28

-reaction may not go to completion
-side reactions may take place
-purification may lead to loss of product

Question 29

common alkalis

Answer 29

Sodium hydroxide (NaOH)
nh3