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zalisa [80]
3 years ago
14

50 Points for whoever does it and shows their work. Maya has four glasses of milk. The temperature and the amount of milk in eac

h glass are shown: Glass A: 20 grams of milk at 10 °C Glass B: 50 grams of milk at 80 °C Glass C: 20 grams of milk at 50 °C Glass D: 50 grams of milk at 80 °C Which statement is correct?
Chemistry
2 answers:
NISA [10]3 years ago
4 0

Answer: A is the correct answer

Explanation:

The temperature of room temperature is more than that and you need to keep it colder, hope this helped!

galina1969 [7]3 years ago
3 0

Answer:

A. 20 grams of milk at 10°C

Explanation:

Since we refrigerate milk, it would be cooler than the room temperature, which standard norm is 25°C. So the milk has to be colder than the room temperature. Therefore, our answer is A.

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Answer:

15.52 kj

Explanation:

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Question 3) A 1.00 L buffer solution is 0.250 M in HF and 0.250 M in LiF. Calculate the pH of the solution after the addition of
Masja [62]

The pH of the solution after adding 0.150 moles of solid LiF is 3.84

<u>Explanation:</u>

We have the chemical equation,

HF (aq)+NaOH(aq)->NaF(aq)+H2O

To find how many moles have been used in this

c= n/V=> n= c.V

nHF=0.250 M⋅1.5 L=0.375 moles HF

Simillarly

nF=0.250 M⋅1.5 L=0.375 moles F

nHF=0.375 moles - 0.250 moles=0.125 moles

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To determine the problem using the Henderson - Hasselbalch equation

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pKa=−log(Ka)

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