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3 years ago

Can someone help me answer these ?

Chemistry

1 answer:

g100num [7]3 years ago

5 0

3.3 ثنائي ميثيل الهكسان

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If the Earth had no tilt, how would that affect our seasons? I will give branliest to first comment

Aleks [24]

Answer:

in my opinion it wouldn't be regular seasons like what we have now it would be equal in every poles .. there would not be ice in North. [its my opinion though] sorry if I am wrong

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3 years ago

[Send a message] as you move across a row from left to right in the period table, atomic numbers of the elements

SashulF [63]

I think it might be D or B
And my other two might be A or C

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4 years ago

Magnesium has 12 electrons. How many electrons will be orbiting in the outermost shell, farthest away from the nucleus?

erica [24]

Answer:

Magnesium has an outer energy level of n=3 with two electrons in in its energy level. Therefor Magnesium has 2 valance electrons.

Explanation:

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3 years ago

A mixture of CO2 and Kr weighs 35.0 g and exerts a pressure of 0.708 atm in its container. Since Kr is expensive, you wish to re

ollegr [7]

Explanation:

Since, it is given that carbon dioxide is completely removed by absorption with NaOH. And, pressure inside the container is 0.250 atm.

For Kr = 0.250 atm and pressure $CO_{2}$ will be calculated as follows.

$CO_{2}$ = (0.708 - 0.250) atm

= 0.458 atm

Now, we will calculate the mole fraction as follows.

$CO_{2} = \frac{0.458}{0.708}$

= 0.646

Kr = $\frac{0.250}{0.708}$

= 0.353

Now, we will convert into gram fraction as follows.

$CO_{2} = 0.646 \times 44$

= 28.424

Kr = $0.353 \times 83.78$

= 29.57

Therefore, total mass is calculated as follows.

Total mass = (28.424 + 29.57)

= 57.994

Hence, the percentage of $CO_{2}$ and Kr are calculated as follows.

$CO_{2} = \frac{28.424}{57.99} \times 100$

= 49%

Kr = $\frac{29.57}{57.99} \times 100$

= 51%

Hence, amount of $CO_{2}$ and Kr present i mixture is as follows.

$CO_{2}$ in mixture = $35 \times 0.49$

= 17.15 g

Kr = $35 \times 0.51$

= 17.85 g

Thus, we can conclude that 17.15 g of $CO_{2}$ is originally present and 17.85 g of Kr is recovered.

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3 years ago

A physical property is a characteristic of a substance is one that _____.

saul85 [17]

A is the answer u need

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4 years ago