Answer:
B
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Group 6 elements usually have extra electrons to make give them an octet. So, they have 6 electrons to start and when they have an octet, they have 8.
We can find the charge by doing simple math 6 - 8 = -2
Answer is D)
Answer: Final temperature of the gas will be 330 K.
Explanation:
Gay-Lussac's Law: This law states that pressure is directly proportional to the temperature of the gas at constant volume and number of moles.
(At constant volume and number of moles)
where,
= initial pressure of gas = 1.00 atm
= final pressure of gas = 1.13 atm
= initial temperature of gas = 
K
= final temperature of gas = ?
Therefore, the final temperature of the gas will be 330 K.
What is called compound?
- In chemistry, a compound is a substance made up of two or more different chemical elements combined in a fixed ratio.
- When the elements come together, they react with each other and form chemical bonds that are difficult to break.
- These bonds form as a result of sharing or exchanging electrons between atoms.
a) Mg(OH)2 or Ni(OH)2.
Mg(OH)2 1.8×10–11
Ni(OH)2 2.0×10–15
Clearly, Ksp value for Mg(OH)2 is higher , meaning it is MUCH MORE SOLBULE than Nickel
therefore, choose Mg(OH)2.
b)
PbS 3×10–28
CuS 6×10–37
Clearly, PbS is much more soluble than CuS
since Ksp is higher .
c)
Ag2SO4 1.4×10–5
MgF2 3.7×10–8
Clearly, Ag2SO4 has higher Ksp, so it is much more soluble.
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