Answer:
Maybe try to memorize it by the valence electrons. You can do this!!
Answer:
c) 35 fl oz
Explanation:
Hello,
In this case, to compute the recommended amount of calcium that the teenager must drink, one performs the following relationship:
Solving for 
, one gets:
Best regards.
The answer is the sun and water
Answer:
0.028kg
Explanation:
We were given 2.6 × 1023 molecules of SO 2 That means that
N = 2.6 × 1023 molecules
Use
n (number of moles) = N
NA (Avogadro's constant)
to get
n =2.6×1023 molecules
6.02 ×1023 molecules/mol = 0.432 moles
Now use
m = n × M (molar mass)
to get
m = 0.432 mol × 64.066 g/mol = 27.677 g
So
m (in kilograms) = 27.677 g
103 g/kg = 0.028 kg
Answer:
8 lithium atoms and 4 oxygen atoms
