0.137 L of the stock solution
M1V1 = M2V2
M1 = 3.25 M
V1 = This is what we’re solving for.
M2 = 1.25 M
V2 = 0.355 L
Solve for V1 —> V1 = M2V2/M1
V1 = (1.25 M)(0.355 L) / (3.25 M) = 0.137 L
Answer:
Last one
Explanation:
There always has to be evidence to back that up.
Rate of reaction
The rate of a reaction is a measure of how quickly a reactant is used up, or a product is formed.
There are different ways to determine the rate of a reaction. The method chosen usually depends on the reactants and products involved, and how easy it is to measure changes in them.
The mean rate of reaction can be calculated using either of these two equations:
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Measuring mass
The change in mass of a reactant or product can be followed during a reaction. This method is useful when carbon dioxide is a product which leaves the reaction container. It is not suitable for hydrogen and other gases with a small relative formula mass, Mr.
The units for rate are usually g/s or g/min.
Chemical changes only happen when the object changes form. Color is a physical property because you're not changing the object that you have, compressibility is also a physical property because you still have the same substance before and sfter, malleability again is another physical. Heat of combustion is physical, when you burn things it changes the substance. :)
