ATOMS and ELEMENTS WORKSHEET NAME
ELEMENT CHEMICAL PROTONS NEUTRONS ATOMIC
NAME
SYMBOL
MASS
ELECTRONS
IONIC ISOTOPE
CHARGE Y or N
CARBON
HYDROGEN
OXYGEN
NITROGEN
SULPHUR
PHOSPHORUS
Na 1
Ca?
Cl1
52
14C
1

43.452

step-by-step explanation:

284 times .153 = 43.452

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