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3 years ago

What’s the difference between 2 Ca and Ca₂?

Chemistry

1 answer:

Dmitrij [34]3 years ago

8 0

Answer:

Explanation:

2Ca is the elemental form of calcium. There are 2 mols of calcium in whatever equation you are talking about.

Ca_2 means that there are 2 ions of Calcium making up something like

Ca3(PO4)2 means that you have the compound Ca3(PO4)2 with 2 mols of PO4 and 3 moles of Ca

It is hard to come up with something composed of Ca2 because unless the other ion is odd, the 2 will divide into something.

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Some SO2 and O2 are mixed together in a flask at 1100 K in such a way ,that at the instant of mixing, their partial pressures ar

kakasveta [241]

Answer:

The answer is " $\bold{0.525\ \ atm^{-1}}$ "

Explanation:

Given equation:

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$\Delta rH =-198.2 \ \ \frac{KJ}{mol}$

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$= (2 \times 0.15)\\\\= (.30) \ atm \\\\$

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$= \frac{(Pressure(So_3))^2}{(Pressure(So_2))^2 \times Pressure(O_2)}\\\\= \frac{0.30^2}{0.70^2 \times 0.35}\\\\= \frac{0.30 \times 0.30 }{0.70\times 0.70 \times 0.35}\\\\= \frac{0.09 }{0.49\times 0.35} \\\\= \frac{0.09 }{0.1715} \\\\= 0.5247 \ \ or \ \ 0.525 \ \ atm^{-1} \\\\$

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