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3 years ago

10

Explain why an ice cube will melt if compressed, even though the temperature remains the same

1 answer:

LiRa [457]3 years ago

6 0

A ice cube melts if compressed, because increasing the pressure decreases the melting point of water.

Ice has an open crystalline structure.

This structure collapses to a smaller volume when the ice melts to form liquid water.

Ice and water are at equilibrium at 0 °C.

If you apply pressure at 0 °C, the ice will melt in an attempt to relieve the stress and get to a smaller volume.

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Does this question make sense or am I going mad?

postnew [5]

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3 years ago

Lpg contains ? (<br> a. methane (<br> b. butane (<br> c. eyhane (<br> d. none of them

disa [49]

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4 years ago

Mercury is 13.6 times as dense as liquid water. What would be the reading of a water-filled barometer at normal atmospheric pres

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4 years ago

If a buffer has an initial pH of 6.34 and the acid has a Ka of 3.46 × 10-4, what is the ratio of conjugate base to weak acid in

Sloan [31]

Answer: The ratio of conjugate base to weak acid in the buffer system is 758 : 1

Explanation:

The dissociation constant for acid = $K_a=3.46\times 10^{-4}$

pH = 6.34

First we have to calculate the value of $pK_a$ .

The expression used for the calculation of $pK_a$ is,

$pK_a=-\log (K_a)$

Now put the value of $K_a$ in this expression, we get:

$pK_a=-\log (3.46\times 10^{-4})$

$pK_a=3.46$

Now we have to calculate the ratio of conjugate base to weak acid in the buffer system

Using Henderson Hesselbach equation :

$pH=pK_a+\log \frac{[\text {conjugate base}]}{[Acid]}$

Now put all the given values in this expression, we get:

$6.34=3.46+\log \frac{[\text {conjugate base}]}{[Acid]}$

$\frac{[\text {conjugate base}]}{[Acid]}=758$

Therefore, the ratio of conjugate base to weak acid in the buffer system is 758: 1

3 0

4 years ago

The scientific name for water is H2O because it contains:_________

andrey2020 [161]

Answer:

a

Explanation:

Each oxygen molecule has 2 hydrogen molecules

6 0

3 years ago