How many atoms are there in 0.75 mol of water? Give answer to 2 decimal places

Number of particles of water = avogadro constant x amount in molTherefore6.02 x10²³ x 0.75= 4.515 x10²³There are 3 atoms in every molecule of water so we need to multiply the number of particles by 34.515 x10²³ x 3 = 1.3545x10²⁴Rounded to 2 decimal places the answer is 1.35x10²⁴