stupid question making sure im right but whats Aluminum rounded to 3 sig figs
27.0g/mole
I agree
To round a number to three significant figures, you need to look at the digit in the fourth place. If it is 5 or higher, you round up. If it is 4 or lower, you round down.
The atomic mass of aluminum is approximately 26.9815.
Since the fourth digit is 5, you would round the number up. Therefore, when rounded to three significant figures, the atomic mass of aluminum is 27.0.