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AleksandrR [38]
3 years ago
13

How many grams of sodium chloride are present in a 0.75 M solution with a volume of 500.0 milliliters?

Chemistry
2 answers:
alexira [117]3 years ago
8 0
M = mol/l

So, M = 0.75 M
       V = 500.0 ML
        Mols = X
c = n/v
n = c(v)
n = 0.75(0.5)
   = 0.375mol
sodium Chloride is 58.5g/mol
1mol = 58.5g, 0.375mol(g)
0.375mol(58.5g)/1mol
Your answer would be: 21.94g




Hope that helps!!!



Yuri [45]3 years ago
6 0
My work and explanations are in the picture. I will comment with the rest of the work.

Hope this helps! :)

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Determine the final temperature of sample with a specific heat of 1.1 J/g°C and a mass of 385 g if it starts out at a temperatur
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Answer:

T2 =21.52°C

Explanation:

Given data:

Specific heat capacity of sample = 1.1 J/g.°C

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Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = Final temperature - initial temperature

885J = 385 g× 1.1 J/g.°C×(T2 - 19.5°C )

885 J = 423.5 J/°C× (T2 - 19.5°C )

885 J / 423.5 J/°C = (T2 - 19.5°C )

2.02°C = (T2 - 19.5°C )

T2 = 2.02°C + 19.5°C

T2 =21.52°C

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valentinak56 [21]

Answer :

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Explanation:

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1. is <em>wrong</em> because H can use only its <em>1s orbital</em> for bonding.

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5. is <em>wrong</em> because H must <em>share electrons</em> to form an H-H bond.

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