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3 years ago

HELP ME ASAP PLEASE AND THANK YOU

Chemistry

1 answer:

mafiozo [28]3 years ago

7 0

F I think since the one on the worst line is an E so I’m pretty sure it’s F :p

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It pushes the positive ions together, the positive ions repel each other, causing the crystal to shatter

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4 years ago

How does entropy change with pressure?

nydimaria [60]

The entropy will increase in pressure if you increase the pressure on the system the volume decrease the energies of the particles are in a smaller space so they are less spread out

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3 years ago

To compare how different types of soil absorbed water, Christian set up an experiment. He poked equal numbers and sizes of holes

lilavasa [31]

Answer:

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Explanation:

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4 years ago

A gas mixture with a total pressure of 750 mmHg contains each of the following gases at the indicated partial pressures: CO2 , 1

jolli1 [7]

Answer: a) 211 mm Hg

b) 0.629 grams

Explanation:

According to Dalton's law, the total pressure is the sum of individual pressures.

$p_{total}=p_1+p_2+p_3+p_4$

$p_{total}$ = total pressure = 750 mmHg

$p_{CO_2}$ = 124 mm Hg

$p_{Ar}$ = 218 mm Hg

$p_{O_2}$ = 197 mm Hg

$p_{He}$ = ?

$750 mmHg=124 mm Hg+218 mm Hg+197 mm Hg+p_{He}$

$p_{He}=211mmHg$

Thus the partial pressure of the helium gas is 211 mmHg.

b) According to the ideal gas equation:

$PV=nRT$

P = Pressure of the gas = 211 mmHg = 0.28 atm (760mmHg=1atm)

V= Volume of the gas = 13.0 L

T= Temperature of the gas = 282 K

R= Gas constant = 0.0821 atmL/K mol

n= moles of gas= ?

$n=\frac{PV}{RT}=\frac{0.28\times 13.0}0.0821\times 282}=0.157moles$

Mass of helium= $moles\times {\text {molar mass}}=0.157\times 4=0.629g$

Thus mass of helium gas present in a 13.0-L sample of this mixture at 282 K is 0.629 grams

8 0

4 years ago

How to know the elements amount of charge please give me example

asambeis [7]

Answer:

There are four ways to find the charge of an element:

Use the periodic table. The usual charge of an element is common to its group. ...

Use a chart. ...

For a single atom, the charge is the number of protons minus the number of electrons.

Find the charge by balancing charge in a compound

3 0

3 years ago