Answer:
mass number
Explanation: its the sum of the protons an neutrons in the nucleus
false
Explanation:
you rarely ever find a material as
a pure substance
Coal
0.893mol
n = m ÷ M
= 275 ÷ (23 + 80)
= 2.67 mol
* now use the Mol ratio *
NaBr : FeBr3
6 : 2
2.67 : x
5.67 = 6x
n( FeBr3 ) = 0.893 mol
