1. First calculate the total molar mass of the entire compound.
Mg = 3 x 24.31 = 72.93 g/mol
P = 2 x 30.97 = 61.94 g/mol
O = 8 x 16.00 = 128.00 g/mol
* Add them up;
72.93 + 61.94 + 128.00 = 262.87 g/mol
2. Take the individual masses of each element that you calculated, divide them by the total mass (262.87 g/mol) and then multiply by 100.
Mg = 72.93/262.87 = 0.2774 x 100 = 27.74%
P = 61.94/262.87 = 0.2356 x 100 = 23.56%
O = 128.00/262.87 = .4870 x 100 = 48.70%
3. All of the percentages should add up to equal 100%.
* Hope this helps
Answer:
the correct answer to your question is 20
The current divides according to the resistance; more current in the lower resistance, less in the higher resistance. This is called “parallel branches” or paths. The voltage is the same for both (all) branches.