Which of these compounds is ionic? A. KF B. CO C. CO2 D. SO2
2 answers:
Remember, ionic is when you have a metal with a nonmetal. covalent is two nonmetal together. most periodic table show that "staircase" on the right side that show where metals and nonmetal are; in any case, I attached a periodic table showing this.
a. KF--> K is metal, F is nonmental, so this is ionic
the rest of the choices are two nonmetals together.
a. KF--> K is metal, F is nonmental, so this is ionic
the rest of the choices are two nonmetals together.
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Answer:
Average atomic mass = 79.9034 amu
Explanation:
The formula for the calculation of the average atomic mass is:
Given that:
<u>For first isotope: </u>
% = 50.69 %
Mass = 78.9183 amu
<u>For second isotope: </u>
% = 49.31 %
Mass = 80.9163 amu
Thus,
<u>Average atomic mass = 79.9034 amu</u>
Answer:
m = 671 grams
Explanation:
Given that,
No of moles, n = 4.9
Molar mass of Barium, M = 137 g
Mass divided by molar mass is equal to no of moles. It can be given by the formula as follows :
or
m = 671 grams
So, the total mass of the sample of Barium is 671 grams.