Answer: The mass of Cu produced is 4.88 g
Explanation:
The number of moles is defined as the ratio of the mass of a substance to its molar mass.
The equation used is:
\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}} ……(1)
Given mass of aluminum = 2.98 g
Molar mass of aluminum = 27 g/mol
Plugging values in equation 1:
\text{Moles of aluminum}=\frac{2.98g}{27g/mol}=0.1104 mol
The given chemical equation follows:
2Al(s)+3CuSO_4(aq)\rightarrow Al_2(SO_4)_3(aq)+3Cu(s)
By the stoichiometry of the reaction:
If 2 moles of aluminum produces 3 moles of Cu
So, 0.1104 moles aluminium will produce = \frac{3}{2}\times 0.1104=0.1656mol of Cu
Molar mass of Cu = 63.5 g/mol
Plugging values in equation 1:
\text{Mass of Cu}=(0.1656mol\times 63.5g/mol)=10.516g
The percent yield of a reaction is calculated by using an equation:
\% \text{yield}=\frac{\text{Actual value}}{\text{Theoretical value}}\times 100 ……(2)
Given values:
% yield of product = 46.4 %
Theoretical value of the product = 10.516 g
Plugging values in equation 2, we get:
46.4=\frac{\text{Actual value of Cu}}{10.516g}\times 100\\\\\text{Actual value of Cu}=\frac{46.4\times 10.516}{100}\\\\\text{Actual value of Cu}=4.88g
Hence, the mass of Cu produced is 4.88 g
True.
No matter what, the energy given by a substance can act as energy for something else. For example, the energy exerted by wind can be used to power a windmill, which in turn can power a generator that creates electricity. Another example can be running water, which generates energy that is used to turn a water turbine, which then generates electricity from the energy that is passing through the turbine.
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Chlorine= 35.5 +35.3= 71 a.m.u.
The answer would be the <span>Chemical formula for ammonia by
hydrogen and nitrogen gas: 1 N2 + 3 H2 --> 2 NH3 t<span>hen use stoichiometry. You know you have enough
nitrogen gas to react, so you can just straight convert mol H2 to mol NH3,
where 3 mol H2 = 2 mol NH3.
<span>3.44 mol H2 * (2 mol NH3 / 3 mol H2) = 2.29 mol NH3</span></span></span>
