your answer should be “A.”
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Answer: Not possible to find average amu with only the information provided.
Explanation:
Is there more information about the other isotopes? I don't see how one could calculate an overall atomic mass with only one isotope is known. An isotope of 186.956 with abundance of 62.6% isn't enough information. We're not told anything about the other isotopes: are they larger, smaller, and at what percentage. If one has an amu of 204.956 at 37.4%, the overall atomic mass would be quite different than if it had an atomic mass of 182.956 at 37.4%. More infornmation is required.
Answer:
Both b/c a chemical formula tells you how many and a sketch formula shows how they are bonded together.
Molecular formulas show how many atoms of each element one molecule of a compound contains. Note: Ionic compounds are generally crystalline solids with high melting points. Other compounds, however, have very different properties.
Answer:
Where are the question's???
Explanation:
Given:
Ksp (CaF2) at 25 degrees Celsius = 3.9 x10^-11
volume of CaCl2 = 100 ml
concentration of CaCl2 = 2.3 x 10^-4 m
Volume of NaF = 500 ml
concentration of NaF = 5.0x10^-3 m
Total volume = 100 + 500 = 600 ml
balanced chemical equation:
2NaF + CaCl2 ===> CaF2 + 2NaCl
calculate the number of moles NaF and CaCl2. Then determine the resulting moles of CaF2 (based on the limiting reactant) and find the concentration of CaF2. If it is more than the Ksp, meaning there will be a precipitate.