Question

@iGreen Which statement is a correct expression of the Law of Conservation of Mass?

A.
The total mass is unpredictable in a chemical reaction.

B.
The total mass remains the same during a chemical reaction.

C.
The total mass decreases during a chemical reaction.

D.
The total mass increases in a chemical reaction.

Answer 1

do yah know? bro

Answer 2

"The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system. Lavoisier's finding laid the foundation for modern chemistry and revolutionized science."

Answer 3

Read that and tell me what you think.l

Answer 4

"in other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction" so b The total mass remains the same during a chemical reaction.

Answer 5

thanxzzz can u help wit another?

Answer 6

(sorry suck at science)

Answer 7

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

Fe2O3 + 3 CO Fe + 3 CO2

A.
Only the Fe is unbalanced.

B.
Only the O is unbalanced

C.
Fe and O are both unbalanced.

D.
C and O are both unbalanced

Answer 8

B is correct for the first one.

Answer 9

Btw, one question per post.

Answer 10

can i ask y?

Answer 11

ok

Answer 12

but why b

Answer 13

\(\color{blue}{\text{Originally Posted by}}\) @deadpoolroxz
"in other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction" so b The total mass remains the same during a chemical reaction.
\(\color{blue}{\text{End of Quote}}\)

You already said why

Answer 14

okok