Answer:
approx 7.41 sextillion
Step-by-step explanation:
One mole of any substance contains 6.022 x 10^23 particles (Avogadro's Number). Therefore, 1 mole of water contains 6.022 x 10^23 water molecules.
To find how many moles are represented by 7.43 x 10^18 molecules of water, we can divide 7.43 x 10^18 by Avogadro's Number:
7.43 x 10^18 / 6.022 x 10^23 = 0.0123 moles of water
Now, we can use this to find the number of water molecules:
0.0123 moles x 6.022 x 10^23 molecules/mole = 7.41 x 10^21 molecules of water
Therefore, 7.43 x 10^18 molecules of water represent 7.41 x 10^21 molecules or approximately 7.41 sextillion (7,410,000,000,000,000,000) molecules of water.