Question

please anyone answer this two questions correctly

Answer 1

7)  1 mole of water = 1x2+16 = 18 gram of water

So, 100 g of water means= 100/18 moles of water

Now, 1 molecule of water contains 1x8 electron of Oxygen and 2x1 electron of Hydrogen= 10 electron per molecule.

So total number of electron in 100 gram water =total molecule in 100 gram waterx number of electron in each molecule= (100/18)×10 moles

= 55.555 moles of electron= 55.555x6.022x10^23 numbers of electron.

Charge on 1 mole electron = 1 Farad

So total charge of these electron= 55.555 Farad

= 55.555× 96485.34 coulombs

Answer 2

ans 7: no. of moles of water =given mass / molar mass = 100/18 = 50/9 moles

total no. of atoms in 100g of water = 6.022 ×10^23 × 50/9 = 3.455 ×10^24 atoms

no. of electrons in 1 atom of H2O = 2×1 +8 = 10

total no. of elctrons = 3.455×10^24 ×10 = 3.455×10^25 electrons..

charge in 1 electron = 1.6 ×10^-19

charge carried by 3.455×10^25 electrons = 1.6×10^-19 × 3.455×10^25 = 5.528 ×10^6
so the answer rounded off....to be... 5.53×10^6