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3 years ago

Water changes from a liquid to a gas in the process of evaporation. true or false

Chemistry

2 answers:

Aleks04 [339]3 years ago

6 0

this is a very true statement

Umnica [9.8K]3 years ago

4 0

This it true because in the triangle of the transformation from solid, liquid, and gas
:0

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Scientists have been able to find a full record of Earth's fossil history, thus making the fossil record complete.

Arada [10]

Answer:

False

Explanation:

Few organisms were not preserved as well as others, and new fossils are found every day

5 0

2 years ago

A helium-filled balloon at 310.0 K and 1 atm, contains 0.05 g He, and has a volume of 1.21 L. It is placed in a freezer (T = 235

trapecia [35]

Answer : The value of $\Delta E$ of the gas is 2.79 Joules.

Explanation :

First we have to calculate the moles of helium.

$\text{Moles of helium}=\frac{\text{Mass of helium}}{\text{Molar mass of helium}}$

Molar mass of helium = 4 g/mole

$\text{Moles of helium}=\frac{0.05g}{4g/mole}=0.0125mole$

Now we have to calculate the heat.

Formula used :

$q=nc_p\Delta T\\\\q=nc_p(T_2-T_1)$

where,

q = heat

n = number of moles of helium gas = 0.0125 mole

$c_p$ = specific heat of helium = 20.8 J/mol.K

$T_1$ = initial temperature = 310.0 K

$T_2$ = final temperature = 235.0 K

Now put all the given values in the above formula, we get:

$q=nc_p(T_2-T_1)$

$q=(0.0125mole)\times (20.8J/mol.K)\times (235.0-310.0)K$

$q=-19.5J$

Now we have top calculate the work done.

Formula used :

$w=-p\Delta V\\\\w=-p(V_2-V_1)$

where,

w = work done

p = pressure of the gas = 1 atm

$V_1$ = initial volume = 1.21 L

$V_2$ = final volume = 0.99 L

Now put all the given values in the above formula, we get:

$w=-p(V_2-V_1)$

$w=-(1atm)\times (0.99-1.21)L$

$w=0.22L.artm=0.22\times 101.3J=22.29J$

conversion used : (1 L.atm = 101.3 J)

Now we have to calculate the value of $\Delta E$ of the gas.

$\Delta E=q+w$

$\Delta E=(-19.5J)+22.29J$

$\Delta E=2.79J$

Therefore, the value of $\Delta E$ of the gas is 2.79 Joules.

3 0

3 years ago

Can you please help. I don't know how to do it.

Rainbow [258]

The area used to be covered by an ocean

3 0

3 years ago

1. How many atoms of oxygen are represented in 3Ba(ClO3)2? (3 points) 3 6 9 18

Nat2105 [25]

Answer:

Explanation:

6 0

2 years ago

Which statement best compares segmented worms and roundworms?

Mariana [72]

Answer:

I think it's A.

Explanation:

Metameric bodies are divided into segments called annuli. Annuli are covered in tiny hairs called setae. Setae help the worms move. So yes it's A.

Happy Thanksgiving too! :D

4 0

2 years ago

Read 2 more answers