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Bumek [7]
3 years ago
9

Please help I will give extra points

Chemistry
2 answers:
Svetllana [295]3 years ago
7 0
I think that it would be 12
yaroslaw [1]3 years ago
7 0
12 hydrogen atoms. One compound of PH3 contains 3 hydrogen atoms. Therefore, 4 of those molecules would be 12 hydrogen atoms. (4 times 3)
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lukranit [14]

Answer:4

Explanation:

7 0
3 years ago
Why is argon used in a light bulb? using the terms of the electronic structure of an argon atom.
AVprozaik [17]
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3 0
3 years ago
Compound X has a molar mass of 266.64 g/mol and the following composition: aluminum 20.24% chlorine 79.76% Write the molecular f
N76 [4]

Answer:

Explanation:

Assume we have 100g of this substance. That means we would have 20.24g of Cl and 79.76g of Al. Now we can find how many moles of each we have:

\frac{79.76 \:g}{35.45 \: g/mol} = 2.25 mol of chlorine

\frac{20.24 \: g}{26.98 \: g/mol} = 0.750 mol of Al.

To form a integer ratio, do 2.25/0.75 = 2.99999 ~= 3.

So the ratio is essentially Al : Cl => 1 : 3. To the compound is possibly AlCl_3.

However, it says it has a molar mass of 266.64 g/mol, and since AlCl3 has a molar mass of 133.32, it must be Al_2Cl_6.

Actually this molecule isn't exactly AlCl3 (which is ionic). Al2Cl6 forms a banana bond where Cl acts as a hapto-2 ligand. But that's a bit advanced. All you need to know is X = Al2Cl6

5 0
3 years ago
A sample of gas has a mass of 827 mg . Its volume is 0.270 L at a temperature of 88 ∘ C and a pressure of 975 mmHg . Find its mo
avanturin [10]

Steps:

Mw = w * R * T / p * V

T = 88 + 273 => 361 K

p = 975 mmHg in atm :

1 atm  = 760 mmHg

975 mmg / 760 mmHg =>  1.28 atm

Therefore:

= 0.827 * 0.0821 * 361 /  1.28 * 0.270

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molar mass =  70.92 g/mol



7 0
3 years ago
¿que diferencia hay entre psicrómetro e higrómetro?
Tasya [4]

Answer:

Un higrómetro que para calcular la humedad se vale de la diferencia de temperaturas entre un termómetro con el bulbo seco y otro con el bulbo húmedo, normalmente se denomina psicrómetro.

Explanation:

7 0
3 years ago
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