Once you balance the enquation you "switch partners" of the element (negative charge to positive charge)
Answer: 2. Heat flows from faster molecules to slower molecules when they collide.
Explanation: Hope this helped! :)
Carbon atom has two isotopes
relative abundance of one isotope = 98.89% = 98.89 / 100 = 0.9889
As this isotopes have 6 neutrons and 6 protons, and there sum is equal to the mass of that isotope = 6 + 6 = 12amu
And other isotope have relative abundance = 1.11% = 1.11/100 = 0.0111
And mass of that isotope = 7 neutrons + 6 protons = 13amu
Now, average atomic mass of carbon = (0.9889 x 12) + (0.0111 x 13) =11.8668 + 0.1443 = 12.0111 = 12.0 = 12
It should be sketch,identify, dig, then set water for the watering times, hope this helps, hope you feel better soon