Answer:
homogeneous mixture of two or more substances.
Explanation:
Answer:
my school is learning about this and we had these for a pratice regent purple=molarity
green=molality
Explanation:
The correct response is A. The inner she'll contains 2 electrons and the outer shell contains 4 electrons.
Ca + 2HCl = CaCl₂ + H₂
c=4.50 mol/l
v=2.20 l
n(HCl)=cv
m(Ca)/M(Ca)=n(HCl)/2
m(Ca)=M(Ca)cv/2
m(Ca)=40g/mol·4.50mol/l·2.20l/2=198 g
198 grams of Ca are needed
A.134 sorry if it’s wrongggg