How many grams of ice at 0.0°C must be added to 225 grams of tea at 35.0°C to cool it down to 5.0°C? Specific heat of tea = 4.18 J/g°C and Hfusion of ice = 334 J/g.

iron and sleel

make siroeel

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.