3 years ago

What indicates that a chemical change has occurred?

1 answer:

5 0

Many things could indicate that a chemical change has occurred. The release of a gas, or bubbling, etc. Just be careful not to mix it up with physical changes. A chemical change means that the chemical structure is different. You can reverse a physical change, but you cannot reverse a chemical reaction.

You might be interested in

When the equation below is balanced, the coefficient of sulfuric acid, h2so4 is: nacn + h2so4 → na2so4 + hcn?

horsena [70]

<span>2NaCN + (1)H2SO4 → Na2SO4 + 2HCN

</span><span>The coefficient of sulfuric acid is 1.</span>

3 0

3 years ago

Which of the following is a limitation of Bohr's model?

Murljashka [212]

Answer:

The answer is:

The first option

Explanation:

6 0

3 years ago

For a colligative property such as freezing point depression, :________

neonofarm [45]

A possible answer is b

5 0

3 years ago

At night,plants take in the gas of

IgorC [24]

Answer:

Oxygen.

Explanation:

They take in oxygen from the air. This is the process of respiration.

5 0

3 years ago

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. When the flashbulb is set off, a chemical reaction takes place in

hoa [83]

Answer:

Oxygen and magnesium come together in a chemical reaction to form this compound. After it burns, it forms a white powder of the magnesium oxide. Magnesium gives up two electrons to oxygen atoms to form this powdery product. This is an exothermic reaction.

6 0

3 years ago