which best describes an element? - a pure substance - a type of a mixture - a pure compound - an impure substance
2 answers:
An element is a pure substance which means it cannot be broken down by any means.
Answer:
A pure substance
Explanation:
An element is a pure substance.
It is only made up of atoms of the same type.
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Answer:
option b is the correct answer
Answer:
The Atlanic Ocean
Explanation:
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
The correct answer is C. Executive branch agencies plan their fiscal budgets for the year. (Apex)
Answer:
1
Explanation:
one volume of nitrogen to react
