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natita [175]
3 years ago
13

#2 6th grade science

Chemistry
1 answer:
kirill [66]3 years ago
6 0
The answer is 4 because in that century the romans empire was raided
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Which of the following rules should you follow to balance chemical equations?
Firdavs [7]

Answer:

c. add coefficients as needed

Explanation:

A chemical equation is defined as the equation that shows changes in a chemical reaction. A chemical equation consist of reactant and product, reactant is at left side of the arrow and product is at right side of the arrow.

Reactant => Product

While balancing a chemical equation, the basic rule is to balance the coefficient as required. Coefficient represents the number of molecules and is used at front of a chemical symbol. Change in coefficient helps balance the number of atoms or molecules of the substances on both the sides of the arrow.

Subscripts are never allowed to change because it can change the chemical involved in the reaction.

Hence, the correct answer is "c. add coefficients as needed".

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LUCKY_DIMON [66]
Yes. It does contain Ions. 
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3 years ago
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A lawnmower runs on gasoline.what type of energy transformation takes place in its engine?
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The gas is ignited (I think) and combustion happens where the gasoline turns into gas (the state of being) and expands, pushing something and making the blades turn so

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Why does his teacher ask him to balance the equation by including the correct coefficients? to show that most molecules exist in
Ne4ueva [31]

Answer:

to show that atoms are conserved in chemical reactions

Explanation:

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Answer: E. none of these

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