Step-by-step explanation:
Zn + 2HCl => ZnCl2 + H2
Moles of Zn = 13g / (65.38g/mol) = 0.198mol
Volume of HCl = 0.396mol / (0.25mol/dm³) = 1.58dm³.
Volume of H2 = 0.198mol * (22.4dm³/mol) = 4.43dm³.

with y equaling the total and x equaling the number if months
Answer:
Expression
Step-by-step explanation:
Expressions use numbers, variables, and operations to form a mathematical calculation.
Equations are similar except they use equal signs, so that makes them different than expressions.
If this answer is correct, please make me Brainliest!
Answer:
A Pyramid
Step-by-step explanation: