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Komok [63]
3 years ago
13

Suggest why CaO rather than MgO is used to dry ammonia.

Chemistry
1 answer:
V125BC [204]3 years ago
5 0
Ca<span>2+</span> is less electro-positive than Mg2+. Therefore, CaO is less ionic than MgO. and in turn means that the O in CaO is more like O<span>2<span>– will react with H in H2O more so than O2- of MgO, because it is more ionic means O is strongly bonded to Mg compare to Ca</span></span>
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How many grams of iron (III) chloride must decompose to produce 78.4 milliliters of iron metal, if the density of iron is 7.87 g
irga5000 [103]
<span>I think this is the correct Answer

the balanced equation is

2 FeCl3 = 2 Fe + 3 Cl2

volume Fe = 78.4 mL / 7.87 g/mL = 9.96 g

moles Fe = 9.96 g / 55.847 g/mL=0.178

the ratio between FeCl3 and Fe is 2 : 2

moles FeCl3 = 0.178

mass FeCl3 = 0.178 x 162.206 g/mL=28.9 g</span>

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3 0
4 years ago
Read 2 more answers
1. You are asked to make 200 mls of a 20mM working (diluted) solution of NaCl using a 2M stock solution. Record the volume of 2M
vekshin1

Answer:

The volume of 2M stock solution added = 2 mL

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Explanation:

Considering

Molarity_{working\ solution}\times Volume_{working\ solution}=Molarity_{stock\ solution}\times Volume_{stock\ solution}

Given  that:

Molarity_{working\ solution}=20\ mM=0.02\ M

Volume_{working\ solution}=200\ mL

Volume_{stock\ solution}=?

Molarity_{stock\ solution}=2\ M

So,  

0.02\ M\times 200\ mL=2\ M\times Volume_{stock\ solution}

Volume_{stock\ solution}=\frac{0.02\times 200}{2}\ mL=2\ mL

<u>The volume of 2M stock solution added = 2 mL</u>

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3 0
3 years ago
At what temperature will water change from a solid to a liquid <br> in Celsius?
Rina8888 [55]

Answer:

Explanation:

For water, the temperature needs to be a little over zero degrees Celsius (0C) for you to melt. If you were salt, sugar, or rock, your melting point is higher than that of water.

4 0
3 years ago
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scoray [572]

Answer:

C

Explanation:

Because i just had to do this on my assignment and got 100

7 0
3 years ago
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Please help!! I’ll mark brainliest if correct!!!!
puteri [66]

Answer:

a.= 7

b.=9

c.=3

thats all i got rn

Explanation:

7 0
3 years ago
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