Describe how you would prepare 150ml of 0.02N NaOH in the laboratory.

Explanation:

molar mass of any subtance in 1 litre water gives 1N solution

for NaOH molar mass =40 g

40g  --- 1000ml ---1N

Xg 150 0.02

X= 40*150*0.02/1000*1 =0.12 g

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8