3 years ago

1.

Chemistry

2 answers:

Tresset [83]3 years ago

6 0

Answer:

A sample of water boils and releases gas.

Explanation:

Physical change is a change where no any chemical reaction takes place only the chemical composition of matter changes. It is a reversible process .

Burning of newspaper, rusting of iron, plant changes carbon dioxide and water into sugar (photosynthesis) are chemical reaction and irreversible process.

ivann1987 [24]3 years ago

4 0

Answer: A sample of water boils and releases gas.

Explanation: When water boils it evaportates but it is still water so this is a psysical change

Hope this helps !

You might be interested in

A chemist prepares a solution of mercury(II) iodide HgI2 by measuring out 0.0067μmol of mercury(II) iodide into a 350.mL volumet

yaroslaw [1]

Answer:

$\large\boxed{0.019\, \mu \text{mol/L}}$

Explanation:

$\text{Concentration } = \dfrac{\text{moles}}{\text{litres}}\\\\\text{c} = \dfrac{n}{V}$

1. Convert millilitres to litres

$\text{V = 350. mL} \times \dfrac{\text{1 L}}{\text{1000 mL}} = \text{0.3500 L}$

2. Calculate the concentration

$c = \dfrac{0.0067\, \mu\text{mol}}{\text{0.3500 L}} = \mathbf{0.019 \, \mu}\textbf{mol/L}\\\\\text{The concentration of mercury(II) iodide is $\large\boxed{\mathbf{0.019\, \mu} \textbf{mol/L}}$}.$

8 0

3 years ago

The temperature at which a liquid changes into a gas is called the _____. boiling point melting point freezing point condensatio

love history [14]

The answer is the boiling point because when you want to change the liquid into a gas you should boil it :)))
i hope this is helpful
have a nice day

5 0

4 years ago

Read 2 more answers

Pick any habitat and model a food web to illustrate the flow of food energy. Those were your teacher’s instructions. You created

Dafna11 [192]

It's not a food web it's a food chain. I just did the exam a few minutes ago. Please mark it Brainliest.

5 0

3 years ago

Who is the father of chemistry

Xelga [282]

Answer: Antoine Lavoisier

3 0