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RSB [31]
3 years ago
7

When a strip of magnesium metal is touched to a flame, a bright light and a whitish substance are produced. Why is the burning o

f magnesium considered a chemical change? because the metal reaches a high temperature because the metal begins to melt because a new substance is formed because the metal is malleable
Chemistry
2 answers:
skad [1K]3 years ago
6 0

Answer:

The production of the whitish substance.

Explanation:

When you add heat to a strip of magnesium, the metal reacts with the surrounding oxygen and produces a whitish smoke that is a new compound that wasn't there before.

sashaice [31]3 years ago
6 0

Answer:C

Explanation: on Edge

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If the theoretical yield of a reaction is 0.110 g and the actual yield is 0.104 g , what is the percent yield?
Westkost [7]
Theoretical Yield is an Ideal yield with 100 % conversion of reactant to product. It is in fact a paper work.

While,

Actual Yield is the yield which is obtained experimentally. It is always less than theoretical yield because it is not possible to have 100% conversion of reactants into products. Even some amount of product is lost while handling it during the process.

Percentage Yield is Calculated as,

                    %age Yield  =  Actual Yield / Theoretical Yield × 100

Data Given:
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                   Theoretical Yield  =  0.110 g

Putting Values,

                    %age Yield  =  0.104 g / 0.110 g × 100

                    %age Yield  =  94.54 %
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An opinion is a statement describing a personal belief or thought that cannot be tested (or has not been tested) and is unsupported by evidence. ... Theories are not described as true or right, but as the best-supported explanation of the world based on evidence.

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