Units for mass

[Isabel Day 1D]

I've noticed that in the De Broglie and Heisenberg uncertainty principle problems, we use kg as the basic unit for mass instead of g. This confused me at first because I thought we should always convert kilos to the base unit (grams, meters, etc.). Are kilograms always used as the base unit for these problems? Does this apply to other equations involving mass in the future as well?

[Sarah Blake-2I]

Since kg is an SI unit, kg will be used often, however, if the problem does not specify what units, I believe it is okay to use either grams or kilograms.

[Adrianh72]

It usually makes more real-life sense to use grams, but since the SI unit is kg, it's often asked for in chemistry problems.

[Donavin Collins 1F]

I believe it wouldn't matter too much if you used grams or kgs, as long as it isn't specified to use a specific unit.

[Betania Hernandez 2E]

Kg is used often because it is an SI unit which is used in DeBroglie's equation.