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3 years ago

12

An airplane flies Minneapolis too Chicago in 74 minutes. If it is 572,000 meters from Minneapolis too Chicago what is the planes

average speed

1 answer:

miv72 [106K]3 years ago

4 0

Answer:

128.8m/s

Explanation:

74 × 60 = 4440 convert minutes to seconds

572000/4440 = 128.82882... speed=distance/time

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Who is responsible for developing the three laws of planetary motion?

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Johannes Kepler- he did it by observing the ‘Tycho Brahe’. His 3rd law was published 10 years later to his first two laws.

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What is the concentration of H^ + at apH = 2 ? Mol / L What is the concentration of H^ + ions at apH = 6 ? Mol/L How many more H

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Answer:

The concentration of hydrogen ion at pH is equal to 2 : $= [H^+]=0.01 mol/L$

The concentration of hydrogen ion at pH is equal to 6 : $[H^+]'=0.000001 mol/L$

There are 0.009999 more moles of $H^+$ ions in a solution at a pH = 2 than in a solution at a pH = 6.

Explanation:

The pH of the solution is the negative logarithm of hydrogen ion concentration in an aqueous solution.

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$2=-\log [H^+]\\$

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$6=-\log [H^+]\\\\$

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Concentration of hydrogen ion at pH is equal to 6 = $[H^+]'=0.000001 mol/L$

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Moles of hydrogen ion in 0.009999 mol/L solution :

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