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3 years ago

If a train travels from San Antonio to El Paso at a speed of 90 mph, how far will it

Chemistry

1 answer:

Minchanka [31]3 years ago

4 0

Answer:it have traveled a total of 315 miles

Explanation: 90 times three because 90 mph times 3 hours=270miles+ the 45 miles from the 30 min times 90 mph=45+ 270=315.

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Write the expression for the equilibrium constant for the reaction represented by the equation CaCO3(s)⇌Ca2+(aq)+CO32−(aq). Is K

Alexeev081 [22]

Answer: For the given reaction, the value of $K_c$ is greater than 1

Explanation:

For the given chemical equation:

$CaCO3(s)\rightleftharpoons Ca^{2+}(aq.)+CO_3^{2-}(aq.)$

The expression of $K_c$ for above equation follows:

$K_c=\frac{[Ca^{2+}]\times [CO_3^{2-}]}{[CaCO_3}]\\\\K_c=[Ca^{2+}]\times [CO_3^{2-}]$

The concentration of pure solids and pure liquids are taken as 1 in equilibrium constant expression

As, the denominator is missing and the numerator is the only part left in the expression. So, the value of $K_c$ will be greater than 1.

Hence, for the given reaction, the value of $K_c$ is greater than 1

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