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kotegsom [21]
4 years ago
14

How much calcium hydroxide in grams is needed to produce 1.5 l of a 0.25m solution?

Chemistry
1 answer:
Vesna [10]4 years ago
6 0
The  mass    ca(Oh)2  needed  to  produce  1.5 l  of  0.25 solution  is  calculated  as follows
find  moles
 
=moles   = molarity   x  volume

moles is therefore =   1.5  x 0.25  =  0.375  moles

mass  =  moles  x  molar  mass
0.375mol  x  74.09 g/mol  =  27.78  grams
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The answers to the questions are as follows;

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  2. The difference in their electronegativities.
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Question 1:

  • How would the electron configuration of nitrogen change to make a stable configuration?

Since Nitrogen has 5 Valence electrons, it needs 3 electrons to attain it's octet configuration. As such, it gains 3 electrons.

Question 2:

  • Which quantity determines how two atoms bond.

The quantity which determines how two atoms bond is The difference in their electronegativities.

Question 3:

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This is because the elements have filled Valence levels.

Question 4:

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The ion which has a stable Valence electron configuration is potassium (K) with a 1+ charge

Question 5;

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5 0
3 years ago
Which class of organic compounds has molecules that contain nitrogen atoms?
ziro4ka [17]
2) amine is the correct answer 
7 0
4 years ago
How much energy is added to change 180g of liquid water to gas at 100 degrees Celsius
Finger [1]

Answer:

40.7 kJ  

Step-by-step explanation:

The formula for the heat, q, needed to evaporate a liquid is

q = mΔHvap


<em>Data:  </em>

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ΔHvap = 2260 J/g

<em>Calculation: </em>

q = 180 g × 2260 /1

q = 40 700 J = 40.7 kJ

7 0
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Explanation:

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Which functional group is found in an ester?
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IN WHICH R AND R' ARE CARBON CHAINS

4 0
3 years ago
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