Since the Mg is in excess, therefore HCl will be fully
consumed in the reaction.
The first step is to find the amount of HCl in mol
Let N (HCl) = amount
of HCl in mol
N (HCl) = (6 mol HCL/L solution) *( 125 mL ) * (1 L/1000 mL)
= 0.75 mol of HCl
Through stoichiometry
N (H2) = 0.75 mol HCl * (1 mol H2/ 2 mol of HCl)
N(H2) = 0.375 mol H2
Since we are asked
for the number of grams of H2 (mass), we multiply this with the molar mass of hydrogen
M (H2) = 0.375 mol H2 ( 2 g H2 / 1 mol H2)
M (H2) = 0.75 g H2
Answer:
g. red, orange, yellow, blue
Explanation:
red is the hottest color and blue is the coolest. :)
ANSWER(S):
p= 3 g/cm³
EXPLANATION(S):
density formula: p= m/V; p= p, m= 9 g, V= 3
p= (9)/(3)
p= 3
p= 3 g/cm³
Multiply each element's atomic mass by the number of atoms of that element in the molecule. This number is represented by the subscript next to the element symbol in the molecular formula.
The term is group
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