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3 years ago

Please give help and label them giving brainiest

Chemistry

1 answer:

Alla [95]3 years ago

7 0

Answer:

huh

Explanation:

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If the volume and Kelvin temperature are reduced by one-half what will happen to the pressure???

jolli1 [7]

Answer:

the pressure will decrease

Explanation:

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3 years ago

A gas used to extinguish fires is composed of 75 % CO2 and 25 % N2. It is stored in a 5 m3 tank at 300 kPa and 25 °C. What is th

tatyana61 [14]

Answer : The partial pressure of the $CO_2$ in the tank in psia is, 32.6 psia.

Explanation :

As we are given 75 % $CO_2$ and 25 % $N_2$ in terms of volume.

First we have to calculate the moles of $CO_2$ and $N_2$ .

$\text{Moles of }CO_2=\frac{\text{Volume of }CO_2}{\text{Volume at STP}}=\frac{75}{22.4}=3.35mole$

$\text{Moles of }N_2=\frac{\text{Volume of }N_2}{\text{Volume at STP}}=\frac{25}{22.4}=1.12mole$

Now we have to calculate the mole fraction of $CO_2$ .

$\text{Mole fraction of }CO_2=\frac{\text{Moles of }CO_2}{\text{Moles of }CO_2+\text{Moles of }N_2}$

$\text{Mole fraction of }CO_2=\frac{3.35}{3.35+1.12}=0.75$

Now we have to calculate the partial pressure of the $CO_2$ gas.

$\text{Partial pressure of }CO_2=\text{Mole fraction of }CO_2\times \text{Total pressure of gas}$

$\text{Partial pressure of }CO_2=0.75mole\times 300Kpa=225Kpa=225Kpa\times \frac{0.145\text{ psia}}{1Kpa}=32.625\text{ psia}$

conversion used : (1 Kpa = 0.145 psia)

Therefore, the partial pressure of the $CO_2$ in the tank in psia is, 32.6 psia.

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3 years ago

What is the atmic number of an elemts that has six protons and eight nuetrons?

cestrela7 [59]

Atomic Number-6
Mass Number-14

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4 years ago

The three main groups of elements are metals, nonmetals, and

Sedbober [7]

Answer:

Metalloids

Explanation:

.... .....................

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3 years ago

If one object has more mass than another then it weighs more or less than the other object?

PSYCHO15rus [73]

It would weigh more: the more mass an object has the more weight is added

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4 years ago