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tekilochka [14]

4 years ago

15

The force that slows down and eventually stops a ball you roll across the pavement is called A) kinetic force. B) friction force

. C) the slow force. D) potential force.

1 answer:

Tpy6a [65]4 years ago

4 0

The ball stops moving because of friction force. Friction is the force that opposes all motion. Therefore, the answer is friction force...

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Equal volumes of two solutions, one containing a strong acid at pH 2 and the other containing a strong base at pH 12, are mixed.

mash [69]

Answer:

7

Explanation:

Assume we have 1 L of each solution.

Solution 1

$\text{[H$^{+}$]}= 10^\text{-pH} \text{ mol/L} = 10^{\text{-2}} \text{ mol/L}\\ \text{ moles of H}^{+} = \text{ 1 L solution} \times \dfrac{10^{-2}\text{ mol H}^{+}}{\text{1 L solution}} = 10^{-2}\text{ mol H}^{+}$

Solution 2

pH = 12

pOH = 14.00 - pOH = 14.00 - 12 = 2.0

$\text{[OH$^{-}$]}= 10^\text{-pOH} \text{ mol/L} = 10^{\text{-2}} \text{ mol/L}\\ \text{ moles of OH}^{-} = \text{ 1 L solution} \times \dfrac{10^{-2}\text{ mol OH}^{-}}{\text{1 L solution}} = 10^{-2}\text{ mol OH}^{-}$

3. pH after mixing

H⁺ + OH⁻ ⟶ H₂O

I/mol: 10⁻² 10⁻²

C/mol: -10⁻² -10⁻²

E/mol: 0 0

The H⁺ and OH⁻ have neutralized each other. The pH will be that of pure water.

pH = 7

8 0

3 years ago

Name 2 things that travel well through metal?

MArishka [77]

Answer:

Heat, electricity x

Explanation:

Hope this helps! :) x

5 0

3 years ago

If 9 moles of P203 are formed, how many<br> moles of O2 reacted?

masha68 [24]

9 x 3 = 27
27 moles of O reacted
27 / 2 = 13.5 O2 reacted
round up to 14 moles of O2

3 0

2 years ago

A __________ ALSO IS MADE UP OF TWO OR MORE ATOMS. BUT IN THIS CASE IT CAN BE THE SAME AS WELL AS DIFFERENT

alina1380 [7]

Answer:

D

Explanation:

3 0

3 years ago

Which of the following is is a chemical property of pure water

german

Answer:

Pure water has an acidity of about 7 on the pH scale. -is a chemical property of pure water. Pure water has an acidity of about 7 on the pH scale

5 0

3 years ago

Read 2 more answers