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Oksanka [162]
3 years ago
10

1. TRUE OR FALSE the best way to deal with groundwater pollution is to avoid letting it happen to start with

Chemistry
1 answer:
ivann1987 [24]3 years ago
3 0
True...
true...
false..
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How can you tell when a solution is formed?
zhuklara [117]
You may tell when a solution os formed when the item or particle, such as sugar or salt,
dissolves completely in the solvent, such as water. 

Basically, you know when a solution is formed when the material you have placed in the solvent disappears :P
5 0
3 years ago
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A drop of water weighing 0.48 g is vaporized at 100 ?c and condenses on the surface of a 55-g block of aluminum that is initiall
irakobra [83]
<h3><u>Answer;</u></h3>

<em>-49 °C</em>

<h3><u>Explanation and solution;</u></h3>
  • Considering the fact that, the specific heat capacity of aluminum is 0.903 J/g x C, and the heat of vaporization of water at 25 C is 44.0 KJ/mol.  

Moles water = 0.48 g / 18.02 g/mol

                      =0.0266  moles

<em>Heat lost by water</em> = 0.0266 mol x 44.0 kJ/mol

                                 =1.17 kJ => 1170 J  

<em>But heat lost =heat gained</em>

<em>Therefore;</em> Heat gained by aluminium = 1170 J  

        1170 = 55 x 0.903 ( T - 25) = 49.7 T - 1242  

                   1170 + 1242 = 49.7 T  

            T = 48.5 °C ( 49 °C <em>at two significant figures)</em>

<em>Hence</em>, final temperature = 49 °C

4 0
3 years ago
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Round to 4 significant<br> figures.<br> 153.587
Tanzania [10]
I believe 153.6 is the answer.
4 0
3 years ago
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Sometimes called the "River of Grass," _________ Is a vast wetland
timama [110]

Answer: A

Explanation:

i just know

6 0
2 years ago
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Romashka [77]

Answer:1

Explanation:cause castle told me

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