The mass percentage of Mg in a magnesium-aluminium alloy that has a mass of 0.263 g is to be determined. Concept introduction: Mass percent is employed to determine the concentration of one compound in a mixture of the compound. The formula to calculate mass percent is as follows: Mass percent of compound = ( mass of the compound mass of mixture )
The mass percentage of Mg in a magnesium-aluminium alloy that has a mass of 0.263 g is to be determined. Concept introduction: Mass percent is employed to determine the concentration of one compound in a mixture of the compound. The formula to calculate mass percent is as follows: Mass percent of compound = ( mass of the compound mass of mixture )
The mass percentage of Mg in a magnesium-aluminium alloy that has a mass of 0.263 g is to be determined.
Concept introduction:
Mass percent is employed to determine the concentration of one compound in a mixture of the compound. The formula to calculate mass percent is as follows:
Mass percent of compound=(mass of the compoundmass of mixture)
(b)
Interpretation Introduction
Interpretation:
The mass percentage of Mg in a magnesium-aluminium alloy that reacts with excess aqueous HCl and forms 1.38×10−2molH2 is to be determined.
Concept introduction:
Stoichiometry of a reaction is utilized to determine the amount of any species in the reaction by the relationship between the reactants and products.
Consider the general reaction,
A+2B→3C
One mole of A reacts with two moles of B to produce three moles of C. The stoichiometric ratio between A and B is 1:2, the stoichiometric ratio between A and C is 1:3 and the stoichiometric ratio between B and C is 2:3.
(c)
Interpretation Introduction
Interpretation:
The mass percentage of Mg in a magnesium-aluminium alloy that reacts with excess O2 and forms 0.483g of oxide is to be determined.
Concept introduction:
Stoichiometry of a reaction is utilized to determine the amount of any species in the reaction by the relationship between the reactants and products.
Consider the general reaction,
A+2B→3C
One mole of A reacts with two moles of B to produce three moles of C. The stoichiometric ratio between A and B is 1:2, the stoichiometric ratio between A and C is 1:3 and the stoichiometric ratio between B and C is 2:3.
On what basis are Na and Nb ranked against each other?
Step 1: add a curved arrow.
Select Draw Templates More
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C
H
Br
0
Br :
:o:
Erase
H
H
H
H
Q2Q
Step 2: Draw the intermediates and a
curved arrow.
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MacBook Air
/ "
C
H
Br
0
9
Q
Erase
2Q
O Macmillan Learning
Question 23 of 26 >
Stacked
Step 7: Check your work. Does your synthesis strategy give a substitution reaction with the expected regiochemistry and
stereochemistry? Draw the expected product of the forward reaction.
-
- CN
DMF
MacBook Air
Clearly show stereochemistry.
Question
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