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Deffense [45]
3 years ago
14

Which of the following correctly describes the law of conservation of energy

Chemistry
1 answer:
egoroff_w [7]3 years ago
3 0
Mass and energy can not be created or destroyed, they may be able to just be converted, and neither one seems without the opposite. For this reason in closed systems, both mass and energy are conserved individually. " I hope this helps "
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In forming a chelate with a metal ion, a mixture of free EDTA (abbreviated Y 4 − Y4− ) and metal chelate (abbreviated MY n − 4 M
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There will 3.95 grams of Na2 and H2O that should be added to form a concentric required solution.

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Which indicator most likely suggests that a chemical change is taking place? 1)change in size 2)change of color 3)change of stat
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Out of the options, the best indicator is a color change since it is the only one that can't really be blamed on a physical change.  you will eventually notice that during qualitative labs and some quantitative labs, usually the thing that you are looking for is either color change or the production of a precipitate to indicate the presence of a chemical reaction  

8 0
3 years ago
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leva [86]
Here's the equation:
<span>Fe2 O3 + 2Al → 2Fe + Al2 O3 
</span>
Here's the question.
What mass of Al will react with 150g of Fe2 O3? 

<span>In every 2 moles Al you need 1 mole Fe2O3 </span>

<span>moles = mass / molar mass </span>
<span>moles Fe2O3 = 150 g / 159.69 g/mol </span>
<span>= 0.9393 moles </span>

<span>moles Al needed = 2 x moles Fe2O3 </span>
<span>= 2 x 0.9393 mol </span>
<span>= 1.879 moles Al needed </span>

<span>mass = molar mass x moles </span>
<span>mass Al = 26.98 g/mol x 1.879 mol </span>
<span>= 50.69 g </span>
<span>= 51 g (2 sig figs) 
</span>
So the <span>mass of Al that will react with 150g of Fe2 O3 is 51 grams.</span>
3 0
3 years ago
The process or method , by which a magnet loses its power , is called…………………… ..
andrey2020 [161]

Answer:

I think it is called demagnetisation.

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C2H4(g) + H2(g) ----&gt; C2H6(g)
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D because wants you add the equation it should increase temp but decrease the value in pressure
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3 years ago
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