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zaharov [31]
3 years ago
14

If 40.0 g of HCl react with an excess of magnesium metal, what is the theoretical yield of hydrogen?

Chemistry
2 answers:
natka813 [3]3 years ago
6 0
The answer is A 1.11g 
just finished the test
Alekssandra [29.7K]3 years ago
5 0

<span>1.    </span>The balanced reaction is:<span>

Mg (s) + 2HCl (aq) --> MgCl 2 (aq) + H 2 (g) 

We are given the amount hydrochloric acid to be used for the reaction. This will be the starting point of the calculation.

40.0 g HCl ( 1 mol HCl / 36.46 g HCl) (1 mol H2 / 2 mol HCl) (2.02 g H2 / 1 mol H2) = 1.11 g H2</span>

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3 0
3 years ago
When converting an acid salt dissolved in water to its acid form, you are instructed to adjust the ph well into the acidic range
777dan777 [17]
First of all, the problem says that you have to convert the acid salt to its acidic form. If you take it to the neutral pH, that won't be acidic at all. As simple as that, you don't take it to neutral pH because it would lose its definition of being acidic afterall.
6 0
3 years ago
Which particle of the atom has a negative charge?
Alex_Xolod [135]
C.) Electron has a negative charge.....
6 0
3 years ago
Consider the anion whose charge is 2- and whose electron configuration is identical to argon. what is the symbol for this anion
AleksAgata [21]

If the ion is negatively charged, anion, it means that it gains two electrons from its surroundings. The number of electrons of an argon (neutral atom) is 18. Two of the electrons in our anion is from the surrounding, so originally it only has 16 electrons.

In the periodic table, the 16th element is sulphur. The chemical symbol of sulphur is S. Thus, the anion is the negatively charged sulphur with chemical symbol of S2-. 

8 0
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Please help me with this question!<br> Am I right?
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You are right!! Good job!!!
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