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Novay_Z [31]
2 years ago
5

Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g)

Chemistry
2 answers:
Naya [18.7K]2 years ago
8 0
Mg(c) + 237shi (4z) ¥at h2)
valentinak56 [21]2 years ago
7 0

Answer:

Explanation:

So you should obtain 0.1875 moles of H2  The theoretical yield of H2, in grams, can be found by multiplying the 0.1875 moles by the molar mass of H2 (2 grams/mole). We would expect, and love to find, 0.37g in our possession.

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A gas has a volume of 5.0 L at a pressure of 50 KPa. What happens to the volume when the pressure is increased to 125?
Alexeev081 [22]
The volume becomes two. You have to use the equation P1 x V1 = P2 x V2 
P is pressure and V is volume.
P1 = 50     P2 = 125
V1 = 5       V2 = v (we don't know what it is)
Then set up the equation:
50 times 5 = 125 times v
250 = 125v
the divide both sides by 125 and isolate v
2 = v
Therefore the volume is decreased to 2.
Also, Boyle's Law explains this too: Volume and pressure are inversely related, This means that when one goes up the other goes down (ie when pressure increases volume decreases and vice versa). Becuase the pressure went up from 50 KPa tp 125 KPa the volume had to decrease.

7 0
3 years ago
How can I find the answer for this ?
12345 [234]
For what? what is your question 
7 0
3 years ago
How much milk at 1 degrees Celsius is needed to reduce the temperature of
Kobotan [32]
It’s can go down to 50 degrees soo that can do
8 0
2 years ago
Which of the following atoms could have an expanded octet when it is the central atom in a covalent compound?a) B
miv72 [106K]

Answer:

only chlorine can expand its octet.

Explanation:

An atom can expand its octet is it has empty d orbital

the electronic configuration of given elements will be:

B : 1s2 2s2 2p1 [Valence shell n =2 no d orbital]

O :1s2 2s2 2p4 [Valence shell n =2 no d orbital]

F : 1s2 2s2 2p5 [Valence shell n =2 no d orbital]

Cl :1s2 2s2 2p6 3s2 3p5 3d0 [Valence shell n =2 no d orbital]

Out of given elements only chlorine has empty d orbitals in its valence shell

Thus only chlorine can expand its octet.

3 0
3 years ago
Can someone help me please :)
Fudgin [204]
I think it’s the third option but I’m not entirely sure
3 0
3 years ago
Read 2 more answers
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