2 years ago

Which is an example of a chemical reaction?

Chemistry

1 answer:

Ainat [17]2 years ago

3 0

Answer:

B) Eating a antacid to calm your upset stomach.

Explanation:

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Quick electron emissions are called

vivado [14]

Answer:

Beta decay

Quick electron emissions are called beta decay

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3 years ago

The ΔHsoln is _____.

nydimaria [60]

Sometimes negative sometimes positive, your answer is B!

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3 years ago

Calculate the pH of a 0.50 M HIO. The Ka of hypoiodic acid, HIO, is 2.3x10–11.0.305.325.479.474.80

never [62]

Answer:

pH = 5.47

Explanation:

The equilibrium that takes place is:

HIO ↔ H⁺ + IO⁻

Ka = $\frac{[H+][IO-]}{[HIO]}$ = 2.3 * 10⁻¹¹

At equilibrium:

[HIO] = 0.5 M - x

[H⁺] = x

[IO⁻] = x

Replacing those values in the equation for Ka and solving for x:

$Ka=\frac{x^2}{0.5-x}=2.3*10^{-11} \\x^2=(2.3*10^{-11})(0.5-x)\\x^2=1.15*10^{-11}-2.3*10^{-11}x\\x^2+2.3*10^{-11}x-1.15*10^{-11}=0\\x=3.39*10^{-6}$

Then [H⁺]=3.39 * 10⁻⁶, thus pH = 5.47

7 0

3 years ago

Help PLEASE HELP PLEASE

Gennadij [26K]

Answer:

b. k+

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3 years ago

What is the molar mass of water in the hydrate? FeSO4 • 7H2O

Rainbow [258]

M=7M(H₂O)

M=7*18.015 g/mol = 126.105 g/mol

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3 years ago