Answer:
V₁ = 10 mL
Explanation:
Given data:
Initial volume of HCl = ?
Initial molarity = 3.0 M
Final molarity = 0.10 M
Final volume = 300.0 mL
Solution:
Formula:
M₁V₁ = M₂V₂
M₁ = Initial molarity
V₁ = Initial volume of HCl
M₂ =Final molarity
V₂ = Final volume
Now we will put the values.
3.0 M ×V₁ = 0.10 M×300.0 mL
3.0 M ×V₁ = 30 M.mL
V₁ = 30 M.mL /3.0 M
V₁ = 10 mL
Gold is classified as a Solid
Answer:
A
Explanation:
A. is correct
A chemical change is one in which a new substance is formed. To check if there is a chemical change when the two liquids were combined, what we simply need to do is to see if there is the formation of a new substance. The new substance formed is expected to be chemically and physically distinctive from its formative members.
B is incorrect
Being pure or impure does not provide any information if a chemical change had occurred or not.
C is incorrect
The toxicity of both doesn’t provide any information as regards if a chemical change had occurred or not
D is incorrect.
Answer:
enzymes re catalyst that helps to speed up the rate of chemical reaction
