What dose it mean to say that mass is conserved during a physical change?

Answers

Answer 1

Answer: It means that the amount of mass will stay the same after the change occurs.

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Is the element CH4 a metal or non metal

Answers

non metal i believe let me know if i helped

A 40.8 mol sample of methane gas, CH4(g), is placed in a1020 L container at 298 K.
What is the pressure, in atm, of the methane gas?
Express the answer using 3 significant figures.
atm

Answers

Answer:

P = 0.979 atm

Explanation:

Given data:

Number of moles of methane = 40.8 mol

Volume of container = 1020 L

Temperature = 298 K

Pressure of gas =?

Solution:

According to ideal gas equation,

PV = nRT

P = pressure

V = volume

n = number of moles

R = general gas constant

T = temperature

Now we will put the values,

P = nRT/V

P = 40.8 mol × 0.0821 atm.L/mol.K × 298 K / 1020 L

P = 998.2 atm /1020

P = 0.979 atm

Which of the following categories of small bodies in the solar system does Ceres belong to? A. Dwarf planets
B. Comets
C. Meteoroids
D. Planets

Answers

Ceres is a dwarf planet, so A.

What is a Fahrenheit??

Answers

Fahrenheit is a temperature scale

One of many temperature scales

How do you calculate the density?

Answers

The way to calculate density is Mass/volume. I hope this helps

Why is it important to ensure that treated water remains safe to drink when it is stored after treatment? what is one way to make stored water safe?

Answers

It is important to ensure that treated water remains safe to drink when it is stored after treatment because of the following reasons:

to prevent from germs.
to prevent ourselves from various diseases.
to protect our health.

The one way to make stored water safe is that stored it in clean container.

Why it is important to drink safe water and how to make stored water safe ?

It is important to ensure that the treated water remains safe to drink when it is stored after the treatment because

To prevent us from germs and other containments: Drinking water contains germs, viruses, bacteria which can lead a serious health problems, diseases suchas cholera.
To prevent ourselves from various diseases: When we stored waterafter treatment it improves the taste of water, smell of water and its appearance also.
To protect our health: Untreated water is not good for drinking for our health because it contains many impurities and they are harmful for our health.

The one way to make stored water safe is that stored it in clean container and do not store the containers of water in direct sunlight.

Thus, we can say that it is important to ensure that treated water remains safe to drink when it is stored after treatment due to prevent us from diseases, germs, viruses and othercontainments. After treatment of water it is must be tested once to that it is stored to ensure that it is safe for drinking or not.

Learn more about the importance of clean water here: brainly.com/question/25945773

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