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Advocard [28]
2 years ago
11

Each element consists of only one type of atom. A.) True B.) False

Chemistry
2 answers:
natima [27]2 years ago
7 0
False there are different configurations of atoms called isotopes
pshichka [43]2 years ago
5 0

Its true because I just answered it.

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Which is the formula for diarsenic pentoxide?<br><br> Ar2O5<br> As5O2<br> As2O5<br> 2As5O
yaroslaw [1]
As205 

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3 years ago
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Question number 10 &amp; 11, answer please and thank you
nika2105 [10]

Answer:

molarity = moles of solution/liters of solution

molarity = 1 mole/2 liters

molarity = 0.5 M

molarity = 50 moles/200 kg

molarity = 0.25 M

Explanation:

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3 years ago
Which are characteristics of natural selection? Select three options.
Luda [366]
Affects populations,
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2 years ago
If air contains 78% Nitrogen by volume, what is the solubility of nitrogen in water at 25 degree celisus​
Svet_ta [14]

The solubility of nitrogen in water at 25 °C= 4.88 x 10⁻⁴ mol/L

<h3>Further explanation</h3>

Given

78% Nitrogen by volume

Required

The solubility of nitrogen in water

Solution

Henry's Law states that the solubility of a gas is proportional to its partial pressure  

Can be formulated  

S = kH. P.  

S = gas solubility, mol / L  

kH = Henry constant, mol / L.atm  

P = partial gas pressure  

In the standard 25 C state, the air pressure is considered to be 1 atm, so the partial pressure of N₂ -nitrogen becomes:

Vn / Vtot = Pn / Ptot

78/100 = Pn / 1

Pn = 0.78 atm

Henry constant for N₂ at 25 °c = 1600 atm/mol.L=6.25.10⁻⁴ mol/L.atm

The solubility :

\tt S=6.25.10^{-4}\times 0.78\\\\S=4.88\times 10^{-4}~mol/L

7 0
2 years ago
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