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oee [108]
3 years ago
13

Which of the following represents a chemical change?

Chemistry
1 answer:
Nikitich [7]3 years ago
7 0

Answer:

Option B : burning of wood

Explanation:

Chemical change is a change where a new substance is created like when you will bur wood you get ash this is a new substance, so burning of wood is a chemical change.

 

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The density of aluminum is 2.7 g/mL if I add a piece of aluminum to a graduated cylinder of water in the water level increases b
viva [34]
The answer would be 5.5g because you have to subtract 8.2 minus 2.7 and you get 5.5g so basically the answer is C.
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3 years ago
What fuel source is Jan using if she exercises at 85% of her maximum aerobic capacity?
Marina86 [1]

Answer:

Carbohydrates

Explanation:

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In the case of fats as an energy fuel source at high intensities, increasing levels of intensity increases fat oxidation but once we get into higher levels of intensity, we return to levels of fat oxidation similar to very low intensities.

4 0
3 years ago
Polymer formed from methylene diphenyl isocyanate
marin [14]

Answer:

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Explanation:

5 0
3 years ago
Which statement is true about Air at different temperatures
Alchen [17]
Are there any choices?
6 0
3 years ago
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A balloon filled with helium occupies 21.0ft³ at 55.0°F. Find the temperature of the helium if the volume of the balloon decreas
harkovskaia [24]

Answer:

Assuming pressure is held constant,the question reduces to a ratio and proportion type of question where;

At constant pressure,

21.0ft³-55.0°F

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The temperature is 28.809°F≈29°F

6 0
3 years ago
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