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kirill [66]
3 years ago
15

What is the resulting formula unit when calcium and sulfur bond?

Chemistry
2 answers:
uranmaximum [27]3 years ago
5 0
Answer:

calcium sulfide

yaroslaw [1]3 years ago
3 0
Calcium + sulfur = calcium sulfide
Na + S = NaS
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The K sp for barium fluoride, BaF2, is 2.45 × 10-5. What is the molar solubility of barium fluoride?
lilavasa [31]

Answer: The molar solubility of barium fluoride is 0.0183 moles/liter.

Explanation:

The equation for the reaction will be as follows:

BaF_2\rightarrow Ba^{2+}+2F^

By Stoichiometry,

1 mole of BaF_2 gives 2 moles of F^- and 1 mole of Ba^{2+}

Thus if solubility of BaF_2 is s moles/liter, solubility of Ba^{2+} is s moles/liter and solubility of F^- is 2s moles/liter

Therefore,  

K_sp=[Ba^{2+}][F^{-}]^2

2.45\times 10^{-5}=[s][2s]^2

4s^3=2.45\times 10^{-5}

s^3=6.12\times 10^{-6}moles/liter

s=0.0183moles/liter

Thus the molar solubility of barium fluoride is 0.0183 moles/liter.

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When bridges are built, special joints must be used because the material of the bridge shrinks, and without these joints, the ma
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Bridges are built of iron. Iron thermally expands in the presence of increased temperature during the day. The length of the iron will increase by simple fractions. At night, when temperature drops, the bar returns back to its initial position.

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<h3>What are control rods?</h3>

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Hence, control rods in a nuclear reactor control a chain reaction by absorbing neutrons. Option C

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