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Leya [2.2K]
2 years ago
6

Can someone help me plz. I will mark them Brainliest.

Chemistry
1 answer:
Sveta_85 [38]2 years ago
8 0
See photo for answer

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Which of these two statements meets the criteria of a
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How many joules of energy is required to bring a five-pound (1 pound = 454 g) bag
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Does water evaporate ant any temprature
natka813 [3]

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No

Explanation:

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2 years ago
An aqueous NaClNaCl solution is made using 111 gg of NaClNaCl diluted to a total solution volume of 1.20 LL .Calculate the molal
Aliun [14]

Answer:

The answer to your question is m = 1.6

Explanation:

Data

mass of NaCl = 111 g

volume of water = 1.2 L

Molality = ?

Formula

Molality = number of moles / volume (L)

Process

1.- Calculate the moles of NaCl

Molecular mass = 23 + 35.5 = 58.5 g

                          1 mol of ------------------- 58.5 g

                          x           -------------------- 111 g

                          x = (111 x 1) / 58.5

                          x = 1.897 moles of NaCl

2.- Calculate the mass of water

density of water = 997 kg/m³

mass = volume x density

mass = 0.0012 x 997

mass = 1.19 kg

3.- Calculate molality

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7 0
3 years ago
Which is considered professional behavior in a laboratory?
natta225 [31]

Answer:

Showing respect

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7 0
2 years ago
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