Which of the following reactions is balanced? A)

Sn2+ + 2Fe3+ → Sn4+ + Fe2+

B)

2Sn2+ + Fe3+ → 2Sn4+ + Fe2+

C)

Sn2+ + 2Fe3+ → Sn4+ + 2Fe2+

D)

Sn2+ + Fe3+ → Sn4+ + Fe2+

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.