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Svetlanka [38]
3 years ago
13

Match each event with its discription

Chemistry
1 answer:
Andre45 [30]3 years ago
8 0

Answer:

full moon to A

new moon to B

solar eclipse to D

lunar eclipse to C

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A. List 3 signs that a chemical reaction occurred.
ioda
A. gas change, color change, and temperature change.

B. color change; one day you wore a ring that wasn't stainless steel in the shower, so the following morning it was rusted.
6 0
3 years ago
In the following reaction, how many grams of NaBr will produce 244 grams of NaNO3? Pb(NO3)20) + 2 NaBr jaPbBr2s 2 NaNO3a) The mo
Shtirlitz [24]
<span> Pb(NO3)2 + 2 NaBr ------> PbBr2 + 2 NaNO3
                     2 mol                             2 mol

M(NaBr)= 102 g/mol
M(NaNO3) = 85 g/mol

1) 244g NaNO3 *1 mol NaNO3/85 g NaNO3 = 244/85 mol NaNO3

2)</span> Pb(NO3)2 + 2 NaBr ------> PbBr2 + 2 NaNO3
                     2 mol                             2 mol<span>
                     x mol                             </span>244/85 mol 
<span>
x=(2 mol*</span> 244/85 mol )/2 mol =  244/85 mol NaBr
<span>
3) </span> 244/85 mol NaBr*102g NaBr/1 mol = (244*102/85) g NaBr =292.8 g NaBr<span>
              

</span>
8 0
3 years ago
____ are made up of solutes and solvents<br><br> A.Suspension <br> B.Colloid<br> C.Solutions
Sever21 [200]
I think it is A if wrong I’m sorry
7 0
3 years ago
Why might a metallic compound be mistaken for an ionic compound, based on its physical properties?
devlian [24]

Answer:

(D). Both metallic and ionic compounds can conduct electricity when molten. However, only metallic compounds can conduct electricity in a solid state.

Explanation:

Metallic compound have the ability to conduct electricity. Since they are Metals they have loosely held electrons which can contribute to electricity conduction.

Ionic compound are brittle physically, ionic compound cannot conduct electricity while being in solid state as the ions are held strongly by electrostatic force of attraction, they can only conduct electricity while they are in molten or aqueous state. In molten state they are forming ions, and ions are free to move within the solution and therefore contribute to electricity conduction.

3 0
3 years ago
What are substances called whose solutions conduct electricity?
Shkiper50 [21]
It is called an electrolyte
4 0
3 years ago
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