Question

the invention of _________ led to the mass production of goods​

Answer 1

declarative sentence (statement) interrogative sentence (question) imperative sentence (command) exclamative sentence (exclamation)

Answer 2

Answer:

In hall and Heroult process

2Al

2

O

3

⟶4Al+3O

2

4C+3O

2

⟶2CO

2

+2CO↑

Only for removal of CO

2

following equation is possible

2Al

2

O

3

+

3×12=36

3C

⟶

4×27=108

4Al

+3CO

2

∵ For 108kg of Al, 36kg of C is required in above reaction

∴ For 270kg of Al require amount of C

=

108

36

×270=90kg