Answer:
b Different amounts of food samples were used.
Explanation:
The mass of the two samples needs to be the same in order for the test to be accurate.
To solve this we use the equation,
M1V1 = M2V2
where M1 is the concentration of the stock
solution, V1 is the volume of the stock solution, M2 is the concentration of
the new solution and V2 is its volume.
65 x V1 = 2 x 200 L
V1 = 6.15 L
Ill say <span>calcium hydroxide but hope this helps :)</span>
There are 8 total hydrogen (H) atoms.
First shell from the nucleus can have a maximum of 2 electrons ! hope this helped
