The chemical formula for water is H2O; therefore each formula unit has three atoms. Avogadro's number is defined as the number of formula units per mole. Therefore, the answer to the stated question is 3 X 6.022 X 1023 = about 1.8066 X 1024 atoms. (If the value "3" is not considered exact, only one significant digit is justified; in that instance, the answer should be written. as 2 X 1024.
3 moles H2O x 18 g/mole = 54 grams (to 2 significant figures)
6
NH3 is balanced at 1:3, so in 3 moles NH3 there are 3*3 = 9 moles H atoms
3,00 moles of Li have 18,066422571.10e23 atoms.
1 mole equals 6.022 x 10 to the 23 molecules
Since there are no subscripts, there is .800 moles of Oxygen atoms and .800 moles of Magnesium because there is .800 moles of the compound.
96.195
6,1x10-3 moles of carbon 36,7350592277.1020 atoms.
NH3 is balanced at 1:3, so in 3 moles NH3 there are 3*3 = 9 moles H atoms
3,00 moles of Li have 18,066422571.10e23 atoms.
In 3 moles of CH4, there are 18.06 x 10^23 times Hydrogen atoms.
3 moles of Ca would have 1.806 × 10^24 atoms.
1 mole equals 6.022 x 10 to the 23 molecules
Since there are no subscripts, there is .800 moles of Oxygen atoms and .800 moles of Magnesium because there is .800 moles of the compound.
96.195
Methane (CH4) has four atoms of hydrogen per molecule. If there are 3 moles of methane, then there are 12 moles of hydrogen.
1.8x10*24
The answer is 3 moles.
1. Three moles of sodium contain 18,06642387.1023 atoms. 2. The mass of three moles of sodium is 68,97 grams.