Which of the following factors contributes most to the amount of energy required to change the temperature of a sample of water by 10C?
1 The source of the sample of water
2 The size of container holding the sample
3 The initial temperature of the sample
4 The amount of water in the sample

Explanation:So, when mass of all the given species is constant. Then change in temperature of iron (Fe) will be the largest because it has the least value of specific heat. Thus, we can conclude that out of the given options iron (Fe) will have the largest temperature change if the same amount of heat is added to each of them.So i think it would be number 3

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.