Multiple Choice
In the chemical equation 2HCl + Na2O → xNaCl + H2O, what value of x will balance the equation?
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3. Chemical Reactions
Balancing Chemical Equations
Multiple Choice
Which of the following is the correct nuclear equation for the fusion of hydrogen-3 (tritium) with hydrogen-1 (protium) to form helium-4?
A
^{3}H + ^{1}H ightarrow ^{4}He + n
B
^{3}H + ^{1}H ightarrow ^{4}He + ^{2}H
C
^{3}H + ^{1}H ightarrow ^{3}He + ^{1}n
D
^{3}H + ^{1}H ightarrow ^{4}He + ^{1}H
Verified step by step guidance1
Identify the reactants: hydrogen-3 (tritium) is represented as \(^{3}\mathrm{H}\) and hydrogen-1 (protium) as \(^{1}\mathrm{H}\).
Write the general form of the nuclear reaction: \(^{3}\mathrm{H} + ^{1}\mathrm{H} \rightarrow\) products.
Apply conservation of nucleon number (mass number) and proton number (atomic number) to determine the products. The total mass number on the left is \$3 + 1 = 4\(, and the total atomic number is \)1 + 1 = 2$.
Recognize that helium-4 (\(^{4}\mathrm{He}\)) has a mass number of 4 and atomic number 2, matching the combined nucleons and protons from the reactants, so it is a likely product.
Since the total mass number and atomic number must be conserved, determine the other product by subtracting the helium-4 nucleus from the total reactants, which results in a neutron (\(^{1}\mathrm{n}\)) as the other product.
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