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erica [24]
3 years ago
15

Compounds containing potassium and oxygen

Chemistry
1 answer:
padilas [110]3 years ago
4 0

Answer: The law of proportion states that elements combine in whole number ratios. The gram readings for K are multiples of each other, both in grams and moles.

Let us compare the ratios:

2.44 grams/1.22 grams = 2

4.89 grams/2.44 grams = 2

Therefore, Potassium always combines with Oxygen in a ratio of 2  is to 1.

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He partial pressure of oxygen gas in our atmosphere is 0.21 atm. this is the partial pressure at which human lungs have evolved
solong [7]
Hello!

The partial pressure of helium to keep the partial pressure of oxygen at 0,21 atm in a scuba-diver tank is 8,09 atm

To solve this question, we can use the Dalton's Law, which states that the total pressure in a container with a mixture of gases is the sum of the partial pressures o each individual gas. For the case of this mixture the Dalton's Law is as follows:

P_{tot}=P_{He} +P_{O_2}

In this equation, we need to clear for PHe, knowing that the PO₂ should be 0,21 atm, to find the required pressure of Helium:

P_{He}=P_{tot} -P_{O_2}=8,30atm-0,21atm=  8,09 atm

Have a nice day!
6 0
3 years ago
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In-s [12.5K]
I believe the correct answer from the choices listed above is the second option. For liquids, it is the temperature that affects vapor pressure. <span>The </span>vapor pressure<span> of any substance increases non-linearly with </span>temperature<span> according to the Clausius–Clapeyron </span>relation<span>. Hope this helps. Have a nice day.</span>
5 0
4 years ago
How many moles of magnesium is 3.01 x 1022 atoms of magnesium?
d1i1m1o1n [39]
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sodium hydroxide, NaOH , is dissolved in water to make up a solution that is 1.58× 10 −5 M in NaOH . What is the pH
mars1129 [50]

Answer:

pH = 9.2

Explanation:

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Explanation:

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