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kow [346]
2 years ago
10

What is the pH of a Koh solution that has [H+]=1.87×10^-13M

Chemistry
2 answers:
xenn [34]2 years ago
7 0
PH=-log[H⁺]
pH=-log(1.87×10⁻¹³)
pH=12.72

I hope this helps.  Let me know if anything is unclear.
vodomira [7]2 years ago
6 0

Answer:

12.7

Explanation:

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What is the percent composition of carbon in heptane c7h16
Gnom [1K]

Answer: the percent composition of carbon in heptane is 83.9%

Explanation:

<u>1) Atomic masses of the atoms:</u>

  • C: 12.01 g/mol
  • H: 1.008 g/mol

<u>2) Molar mass of heptane:</u>

  • C₇H₁₆: 7 × 12.01 g/mol + 16×1.008 g/mol = 100.2 g/mol

<u>3) Mass of carbon in one mole of heptane:</u>

  • C₇: 7 × 12.01 g/mol = 84.07 g/mol

<u>3) Percent composition of carbon:</u>

  • % = (mass in grams of C) / (mass in grams of C₇H₁₆) × 100 =

           = (84.07 g/ 100.2 g) × 100 = 83.9% ← answer

8 0
3 years ago
A 3.56 L balloon is compressed to 1.00 L at constant temperature. If the initial pressure in the balloon was 101.3 kPa, what is
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3 years ago
How much force is needed to make a 60 kg object accelerate at a rate of 2.0 m/s2?
marusya05 [52]

Answer: 120N

Explanation:

Given variables are:

force needed = ?

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acceleration = 2.0 m/s²

Since the magnitude of force depends on the mass of the object and the acceleration by which it moves.

i.e Force = mass x acceleration

Force = 60 kg x 2.0 m/s²

Force = 120 N

Thus, 120 Newton of force is needed to make 60 kg object accelerate at a rate of 2.0 m/s²

7 0
2 years ago
Which of these contains information about the elements
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7 0
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N
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Answer:

yes

Explanation:

the definition for time is correct, the definition for speed is incorrect

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