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Tema [17]
3 years ago
11

what is the pressure inside a tank when it contains 87.3 moles of Helium if it holds 52.0 miles at 9.63 atm

Chemistry
1 answer:
Vladimir [108]3 years ago
3 0
We are given
n = 87.3 moles He

no = 52.0 moles
Po = 9.63 atm

Using the relationship between Pressure and number of moles
Po/no = P/n
Substituting
9.63 atm / 52.0 mol = P / 87.3 mol
Solve for P<span />
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Calculate the pH of a solution with [H₃O⁺] = 1 × 10¯⁴ M to the correct number of decimal places.
wolverine [178]
I’m not sure 62840462
7 0
3 years ago
Two samples of potassium iodide are decomposed into their constituent elements. The first sample produced 13.0 g of potassium an
Cerrena [4.2K]

Answer:

79.4 kg

Explanation:

The formula for potassium iodide is:-

KI

This means that they are present in the same mole ration, i.e. 1 : 1

Also for 2 samples, the ratio of the masses must be equal .

So,

\frac{Mass\ of\ potassium\ in\ sample\ 1}{Mass\ of\ Iodine\ in\ sample\ 1}=\frac{Mass\ of\ potassium\ in\ sample\ 2}{Mass\ of\ Iodine\ in\ sample\ 2}

Thus,

Mass of potassium in sample 1 = 13.0 g

Mass of Iodine in sample 1 = 42.3 g

Mass of potassium in sample 2 = 24.4 kg

Applying in the above formula, we get that:-

\frac{13.0\ g}{42.3\ g}=\frac{24.4\ kg}{Mass\ of\ Iodine\ in\ sample\ 2}

Mass of iodine in sample 2 = 79.4 kg

5 0
3 years ago
A chemical buffer is a solution that increases pH changes when small quantities of an acid or base are added. True False
Alex

Answer:

false

Explanation:

A buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa. Its pH changes very little when a small amount of strong acid or base is added to it. A buffer protects from ph increasing.

7 0
2 years ago
Chemistry questions?
ryzh [129]

Answer:

its to hard

Explanation:

6 0
3 years ago
One mole of nitrous acid (HNO2) contains 1.00 gram of hydrogen (H), 14.0 grams of nitrogen (N), and 32.0 grams of oxygen (O). Wh
Zigmanuir [339]
Mass % of nitrogen = mass of nitrogen*100  / total mass 

= 14*100 / (1+ 14 + 32)

= 14*100 / 47
= 29.7 % 



8 0
3 years ago
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