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3 years ago

Bob roller skates with a constant speed of 8 km/h. How long will he take to 2 poin

Chemistry

1 answer:

Jet001 [13]3 years ago

6 0

Answer: 1.25 hours (75 minutes)

Explanation: 1 hour / 8 km • (10 km) = 1.25 hours

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If a substance contains a hydrogen ion concentration of 1.0 x 10-5 M, which types of ions does it contain more of?

miss Akunina [59]

Since the pH of the substance is 5, the substance contains more of hydrogen ions.

<h3>What is pH of a solution?</h3>

The pH of a a solution is the negative logarithm to base ten of the hydrogen ions concentration of the solution.

$pH = -log[H^{+}]$

A neural solution has pH 7.

A solution with pH below 7 has more hydrogen ions while a solution with pH above 7 has more hydroxide ions.

The pH of a substance contains a hydrogen ion concentration of 1.0 x 10-5 M is 5.

Therefore, the substance contains more of hydrogen ions.

Learn more about pH at: brainly.com/question/940314

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2 years ago

What is the main intermolecular force in H2CO?

aivan3 [116]

Dipole-dipole interactions, and London dispersion interactions

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4 years ago

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Natasha2012 [34]

Answer:

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3 years ago

Calculate the [H+] and pH of a 0.0040 M hydrazoic acid solution. Keep in mind that the Ka of hydrazoic acid is 2.20×10−5. Use th

Vera_Pavlovna [14]

Answer:

$[H^+]=0.000285$

$pH=3.55$

Explanation:

In this, we can with the ionization equation for the hydrazoic acid ( $HN_3$ ). So:

$HN_3~~H^+~+~N_3^-$

Now, due to the Ka constant value, we have to use the whole equilibrium because this is not a strong acid. So, we have to write the Ka expression:

$Ka=\frac{[H^+][N_3^-]}{[HN_3]}$

For each mol of $H^+$ produced we will have 1 mol of $N_3^-$ . So, we can use "X" for the unknown values and replace in the Ka equation:

$Ka=\frac{X*X}{[HN_3]}$

Additionally, we have to keep in mind that $HN_3$ is a reagent, this means that we will be consumed. We dont know how much acid would be consumed but we can express a subtraction from the initial value, so:

$Ka=\frac{X*X}{0.004-X}$