Leucine is an essential amino acid used in the synthesis of proteins in the body.
What is the relative molecular mass of leucine?
144 g
86 g
125 g
131 g
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Leucine is an essential amino acid used in the synthesis of proteins in the body.
What is the relative molecular mass of leucine?
144 g
86 g
125 g
131 g
Choose your answer
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What mass of magnesium oxide is formed when 21 g of magnesium carbonate thermally decomposes via the following equation. (Ar = Mg = 24, C = 12, O = 16)
MgCO3 (s) → MgO (s) + CO2 (g)
10
11
20
22
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6 g of hydrogen react with 48 g of oxygen to form water. A chemist performs the same reaction using 2 g of hydrogen.
What mass of oxygen is required to combine with the hydrogen?
24 g
12 g
16 g
72 g
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Ammonia is manufactured by the reaction of hydrogen and nitrogen in the Haber process, as shown in the equation below:
N2 + 3 H2 → 2 NH3
16.8 tonnes of ammonia can be produced from 14 tonnes of nitrogen.
How much nitrogen is needed to produce 51 tonnes of ammonia?
42.5
34
17
24.5
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