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sergiy2304 [10]
3 years ago
15

Why would the federal government and city government find it necessary regulate water standard?

Chemistry
1 answer:
Helga [31]3 years ago
4 0
They do this so that when you drink it or use it the contaminates that used to be in it dont make you sick

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Balance the equation<br> N2O5 + H2 -&gt; NH3 + H2O
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Answer:

I hope this is it. I'm not really sure.

4 0
3 years ago
How many minutes are in 9,040 ms
aivan3 [116]

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0.15066667

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7 0
3 years ago
This is very difficult
Oliga [24]

Answer: C

Explanation:

6 0
3 years ago
A group 2 metal carbonate has a mass of 84 g/mol. Identify the group 2 metal X using its chemical formula.
zepelin [54]

Answer:

Magnesium

0.003mole

Explanation:

The problem here entails we find the metal in the carbonate.

 For group 2 member, let the metal  = X;

 The carbonate is XCO₃;

 If we sum the atomic mass of the elements in the metal carbonate, we should arrive at 84g/mol

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                            O  = 16g/mol

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The element with atomic mass of 24g is Magnesium

B.

Number of moles in 0.3g of CaCO₃:

     Molar mass of CaCO₃   = 40 + 12 + 3(16)  = 100g/mol

 Number of moles = \frac{mass}{molar mass}  

 Number of moles  = \frac{0.3}{100}   = 0.003mole

7 0
3 years ago
Fast pls..,.,,..,,.,.,.
OLga [1]
I believe the answer is gills

Fish's use gills to breathe, so tadpoles should use gills too

hope this helps

(got the info from a documentary i watched a couple years ago)
4 0
3 years ago
Read 2 more answers
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