Choose the first one the process is shown in the following picture
Answer:
126g
Explanation:
Data obtained from the question include:
Mole of Fe = 2.5moles
Molar Mass of Fe = 56g/mol
Mass of Fe =?
Number of mole = Mass/Molar Mass
Mass = number of mole x molar Mass
Mass of Fe = 2.25 x 56
Mass of Fe = 126g
Therefore, the mass in 2.25mol of Fe is 126g
Answer: 9L
Explanation:
(6 x 300) = 1800 / 200 = 9
Answer: 0.77 mole
Explanation:
Atomic mass of Ca = 40g/mol
Atomic mass of O = 16g/mol
Atomic mass of H = 1
Therefore,
1 mole of Ca(OH)_2 contains
40+[16+1]2
= 40+34
=74g/mole
Hence,
1 mole of Ca(OH)_2 = 74g
Let x mole of Ca(OH)_2 = 56. 78
x = 56.78/74
x = 0.77 mole