How many grams of nickel (ni, 58.69 g/mol) are in 1.57 moles of nickel?

Answer : The mass of nickel is, 92.1433 grams

Explanation : Given,

Moles of nickel = 1.57 mole

Molar mass of nickel = 58.69 g/mole

Formula used :

Now put all the given values in this formula, we get the mass of nickel.

Therefore, the mass of nickel is, 92.1433 grams

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2