Answer:
The composition of a nuclide (atomic nucleus) is defined by the number of protons Z and the number of neutrons N, which sum to mass number A.Proton number Z, also named the atomic number, determines the position of an element in the periodic table.The approximately 3300 known nuclides are commonly represented in a chart with Z and N for its axes and the half-life for radioactive decay
Explanation:
First convert the given volume of hydrogen gas to grams by
multiplying the volume with the given density. The mass of hydrogen gas is
22.50197 grams. Then convert the mass of hydrogen to moles by dividing it with
its molar mass. Multiply the moles of hydrogen gas with 2/3 because in the
formation of ammonia you would need 3 mol of hydrogen to form 2 moles of
ammonia. Then multiply the moles of ammonia with the molar mass which is 17.031
grams. The mass of ammonia is 126.48 grams.
If the half-life of a sample of a radioactive substance is 30 seconds, how much would be left after 60 seconds? <span>
A. one-fourth</span>
Answer: 1.3 L
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
To calculate the volume for given molarity, we use the equation:
Thus the volume in Liters is 1.3