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Sauron [17]
3 years ago
14

The acceleration of gravity on the moon is 1.6 m/s 2 and on earth it is 9.80 m/s 2. If the weight of a person on earth is 400 N,

then he/she would weigh on the moon.
Chemistry
2 answers:
sveticcg [70]3 years ago
7 0

Answer:

He/She would weigh 65.30 N\\ on the moon.

Explanation:

Weight = (Mass) * (gravity)\\

Considering weight on earth, mass of the object will be

400 = (Mass) x (9.8 \frac{m}{s^2} )\\Mass =  40.81 N\\

Weight on earth

= 40.81 N * 1.6 \frac{m}{s^2}\\= 65.30 N\\

photoshop1234 [79]3 years ago
6 0
I think it might be about 65.31 N on the moon...I've never done this before but what I did was divide 400N by 9.8 to get their mass then multiply the MASS by 1.6 to get the WEIGHT on the moon
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A buffer solution contains 0.240 M ammonium chloride and 0.499 M ammonia. If 0.0565 moles of perchloric acid are added to 250 mL
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Answer:

The pH of the resulting solution is 9.02.

Explanation:

The initial pH of the buffer solution can be found using the Henderson-Hasselbalch equation:

pOH = pKb + log(\frac{[NH_{4}Cl]}{[NH_{3}]})  

pOH = -log(1.78\cdot 10^{-5}) + log(\frac{0.240}{0.499}) = 4.43        

pH = 14 - pOH = 14 - 4.43 = 9.57

Now, the perchloric acid added will react with ammonia:

n_{NH_{3}} = 0.499moles/L*0.250 L - 0.0565 moles = 0.0683 moles

Also, the moles of ammonium chloride will increase in the same quantity according to the following reaction:

NH₃ + H₃O⁺ ⇄ NH₄⁺ + H₂O    

n_{NH_{4}Cl} = 0.240 moles/L*0.250L + 0.0565 moles = 0.1165 moles

Finally, we can calculate the pH of the resulting solution:

pOH = pKb + log(\frac{[NH_{4}Cl]}{[NH_{3}]})  

pOH = -log(1.78\cdot 10^{-5}) + log(\frac{0.1165 moles/0.250 L}{0.0683 moles/0.250 L}) = 4.98  

pH = 14 - 4.98 = 9.02

Therefore, the pH of the resulting solution is 9.02.

I hope it helps you!

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