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yuradex [85]
3 years ago
14

Is feldspar hard or soft

Chemistry
1 answer:
STALIN [3.7K]3 years ago
3 0
Feldspar is Soft but sometimes can be hard if a chemical reaction occurs
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If an oxygen has 1s2 2s2 2p4 , how many more electrons should it have to be octet .
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Answer:

14

Explanation:

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What properties do ionic compounds have?
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Limescale removers contain sulfamic acid, H3NSO3, which reacts with minerals in hard water
I am Lyosha [343]

Answer:

0.375 moles of CaCO₃ are required

Explanation:

Given data:

Number of moles of sulfamic acid = 0.75 mol

Number of moles of calcium carbonate required = ?

Solution:

Chemical equation:

2H₃NSO₃ + CaCO₃     →        Ca(SO₃NH₂)₂ + CO₂ + H₂O

Now we will compare the moles of H₃NSO₃  and CaCO₃ .

                H₃NSO₃           :            CaCO₃  

                     2                 :             1

                   0.75              :           1/2×0.75 = 0.375 mol

Thus, 0.375 moles of CaCO₃ are required.

 

4 0
3 years ago
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