Answer:
moles Ar in 20g = 0.500 mole Ar
Explanation:
moles = grams given / formula weight = 20g / 39.948g·mol⁻¹ = 0.500 mole Ar
75km/hr
A car traveling with constant speed travels 150km in 7200 s. What is the speed of the car
1.strong acid: 2
2.weak acid:6
3.strong base:13
4.weak base:8
5.neutral:7
The reaction equation is:
Li + Br → LiBr
39 grams of Li = 39 / 7 = 5.57 moles of lithium
41.5 grams of Br = 41.5 / 80 = 0.52 mole of bromine