Question

3.05 Quiz: Chemical Equations Pool 1
Question 1 (1 point)


What does the law of conservation of mass state?
Question 1 options:


Mass cannot be created nor destroyed in a chemical reaction


Mass can be created but not destroyed in a chemical reaction.


Mass can be destroyed but not created during a chemical reaction.


Mass can be created and destroyed during a chemical reaction.
Question 2 (1 point)


Which element(s) is/are not balanced in this equation?


Pb(NO3)2 + 2 KCl → PbCl2 + KNO3

Question 2 options:


K


K, N, and O


N and O


Pb, N, and O
3.05 Quiz: Chemical Equations Pool 2

Question 3 (1 point)


Which of these equations is balanced?



a. H2SO4 + 2Al → Al2(SO4)3 + H2

b. 2KCl + Pb(NO3)2 → 2KNO3 + PbCl2


Question 3 options:


a


b


a and b


neither

Question 4 (1 point)


How would you balance this equation?

HCl + Ba → BaCl2 + H2
Question 4 options:


Place a 2 in front of the HCl and a 2 in front of the Ba.


Place a 2 in front of the HCl


Place a 2 in front of the Ba.


It is already balanced.
3.05 Quiz: Chemical Equations Pool 3

Question 5 (1 point)

Saving...

Nitrogen gas (N2) and hydrogen gas (H2) combine to form ammonia (NH3). Which equation correctly represents this reaction?

Question 5 options:


N + H → NH


2N2+ H2 → 3NH3


2NH → N + 3H2


N2+ 3H2 → 2NH3

Answer 1

Answer 1 : -

1st option

Answer 2 : -

2nd option

Answer 3 : -

2nd option

Answer 4 : -

4th option

Answer 5 : -

4th option

Hope it helps !!!

Answer 2

Hii ☺️

you are welcome in my ans

1) mass can't be created nor destroyed in a chemical reaction .

2)k,n,o

3)b

4)place 2 in front of HCL

4)N2 + 3H2----> 2NH3

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Hope it may helps you