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3 years ago

What is Charles's law? State the definition of the law in words.

1 answer:

4 0

Answer:a law stating that the volume of an ideal gas at constant pressure is directly proportional to the absolute temperature

Explanation:

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During which stroke of a four-stroke internal combustion engine is work done to the system of gases?

lapo4ka [179]

A, Compression
Compression of a gas always requires work

8 0

3 years ago

Be sure to answer all parts. A mixture of CO2 and Kr weighs 47.9 g and exerts a pressure of 0.751 atm in its container. Since Kr

ololo11 [35]

Answer:a) Mass of $CO_2$ in mixture = 26.3 grams

b) Mass of $Kr$ in mixture that can be recovered= 21.5 grams

Explanation:

Given :

Total Pressure = pressure of krypton + pressure of carbon dioxide = 0.751 atm

pressure of krypton = 0.231 atm

Thus pressure of carbon dioxide = 0.751 - 0.231 =0.52 atm

As we know:

$p=x\times P$

where,

$p$ = partial pressure

$P$ = total pressure = 0.751 atm

$x$ = mole fraction

For $CO_2$

$x_{CO_2}=\frac{p_{CO_2}}{P}=\frac{0.52}{0.751}=0.70$

${\text {Mass of} CO_2}=moles\times {\text {Molar mass}}=0.70\times 44=30.8g$

For $Kr$

$x_{Kr}=\frac{p_{Kr}}{P}=\frac{0.231}{0.751}=0.30$

${\text {Mass of} Kr}=moles\times {\text {Molar mass}}=0.30\times 84=25.2g$

Total mass = Mass of $CO_2$ + Mass of krypton = 30.8 + 25.2 = 56 g

Percentage of $CO_2=\frac{30.8}{56}\times 100=55\%$

a) Thus Mass of $CO_2$ in mixture = $\frac{55}{100}\times 47.9=26.3g$

Percentage of $Kr=\frac{25.2}{56}\times 100=45\%$

b) Thus Mass of $Kr$ in mixture that can be recovered= $\frac{45}{100}\times 47.9=21.5g$

7 0

3 years ago

Which of the following is unrelated to estimating vapor pressure? (a) Antoine's Equation (b) Cox charts (c) Gibb's phase rule (d

Bezzdna [24]

Answer:

Explanation:

Gibb's phase rule :

describe the relationship between the number of degrees fredoom in a closed system, the number of phases in equilibrium and the number of the system components.

f = c - p + 2

the above is no related to the estimation of the vapor pressure.

3 0

3 years ago

KHP, the acid used in this experiment,

Dvinal [7]

Answer:

false

Explanation:

standard form is Potassium hydrogen phthalate

7 0

3 years ago

A new element X is found and in the sample 70% has a mass number of 43, 25% is X-44, & 5% is X-47. What is the (average) ato

Semenov [28]

The average atomic mass of this new element X is 43.45

HOW TO CALCULATE AVERAGE ATOMIC MASS:

The average atomic mass of an element can be calculated by the following steps:

multiplying the atomic mass of each isotope with its relative abundance
Then sum the results for each isotope

According to this question; a new element X is found and in the sample:

70% is X-43
25% is X-44
5% is X-47

The average atomic mass of element X is calculated thus:

X-43: 70/100 × 43 = 30.1

X-44: 25/100 × 44 = 11

X-47: 5/100 × 47 = 2.35

Next, we sum the results as follows:

= 30.1 + 11 + 2.35

= 43.45

Therefore, the average atomic mass of this new element X is 43.45.

Learn more: brainly.com/question/13753702?referrer=searchResults

6 0

3 years ago