Answer:
The density of a potato is 
Explanation:
Given that,
A potato that is too large to fit into a graduated cylinder.
Let us consider the mass of potato is M and volume of entire potato is V'.
The volume of water is V.
We know that,
Density :
The density is equal to the mass divided by volume.
In mathematically,

Where, m = mass
V = volume
We need to calculate the volume of potato
Using formula for volume

Where, V' = volume of potato
V''=Volume of combine water and potato
V = volume of water
We need to determine the density of a potato
Using formula of density

Put the value into the formula

Hence, The density of a potato is 
Answer:
O(Oxygen)
Explanation:
2+2+4=8
And the eighth element of the periodic table is Oxygen
Answer:
Calcium
Explanation:
It has 20 electrons to start, loses two to become Ca 2+, and is left with 18 electrons
Answer:
A change is called irreversible if it cannot be changed back again. In an irreversible change, new materials are always formed.
Explanation:
B will make little difference to reaction rate while C and D will reduce the reaction rate. So the answer is A. adding heat energy to the reactants
.