No, two atoms that have identical mass numbers can never be considered isotopes of one another. This is due to the fact that for atoms to qualify as isotopes, they must consist of the same number of protons while differing in the number of neutrons. If two atoms share the same mass number, their proton count must also be identical, which implies these atoms cannot be isotopes of each other.
The empirical formula is K₂CO₃.
This formula represents the most simplified whole-number ratio of atoms in a chemical compound.
The atom ratio aligns with the mole ratio, which means our task is to find the molar ratios for K:C:O.
I prefer to summarize these calculations in table form.
Element Moles Ratio¹ Integers²
K 0.104 2.00 2
C 0.052 1.00 1
O 0.156 3.00 3
¹ To obtain the molar ratio, each mole value is divided by the smallest mole count.
² Convert the ratio values to integers (2, 1, and 3).
The empirical formula is K₂CO₃.
Answer:
Calcium phosphate has the formula Ca3(PO4)2, which has a molar mass of 310 grams per mole.
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For 2.3*10^-4 moles, we calculate 2.3*10^-4 * 310, resulting in 713*10^-4 grams, or 71.3 milligrams.
If the formula is accurate but the compound's name is incorrect, simply replace 310 with 278, yielding 639.4*10^-4 grams, equivalently 63.94 milligrams.
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