Which force is a contact force

Chemistry

2 answers:

stiks02 [169]3 years ago

8 0

Answer:

B. a bike braking

Explanation:

It involves friction! Hope this helps!

den301095 [7]3 years ago

8 0

B a bike braking because your contacting force on the bike .

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Which of the following is TRUE? a) A neutral solution contains [H2O] = [H3O⁺] b) A neutral solution does not contain any H3O+ or

Tpy6a [65]

<h2>An acidic solution has $[H_3O^+]$ > $[OH^-]$ </h2>

Explanation:

pH is the negative logarithm of hydronium ion concentration present in a solution.

If the solution has high hydrogen ion concentration, then the pH will be low and the solution will be acidic. The pH range of acidic solution is 0 to 6.9. The solution has more $[H_3O^+]$ than $[OH^-]$

If the solution has low hydrogen ion concentration, then the pH will be high and the solution will be basic. The pH range of basic solution is 7.1 to 14. The solution has more $[OH^-]$ than $[H_3O^+]$

The solution having pH equal to 7 is termed as neutral solution.The solution has equal concentration of $[H_3O^+]$ and $[OH^-]$

Learn more about acidic, basic and neutral solution

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3 years ago

Can anyone help with this?

8090 [49]

Yes what is it..we can help you

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4 years ago

If 30mL of 0.5M KOH is needed to neutralize 2M HCl, what was the volume of the acid?

defon

The equation for the reaction between KOH and HCl is as follows
KOH + HCl ---> KCl + H2O
the stoichiometry of KOH to HCl = 1:1
the number of KOH moles reacted = 0.5 mol /1000 cm³ * 30 cm³
= 0.015 mol
the number of HCl moles reacted = number of KOH moles reacted
therefore HCl moles reacted = 0.015 mol
the molarity of HCl is 0.2 mol/dm³
0.2 mol of HCl in - 1000 cm³
Therefore volume required for 0.015 mol = 1000 cm³ / 0.2 mol * 0.015 mol
= 75 cm³
Therefore 75 cm³ of HCl is required

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