By definition, Avogadro's Number is the number of molecules or formula units in the number of grams corresponding to the gram molecular weight or gram formula unit, and by experiment, Avogadro's Number is about 6.022 X 1023. Therefore, 7.75 X 1025 formula units contains (7.75 X 1025/6.022 X 1023) or 1.29 X 102 moles or formula units, to the justified number of significant digits.
26.3 g of calcium hydroxide contain 2,054 molecules.
32 g SO2 x 1 mole SO2/96 g x 6.02x10^23 molecules/mole = 2.0x10^23 molecules
The answer is 1,57.10e27 molecules.
1,4.10e23 molecules
The answer is 1,357.10 ex.23 molecules.
Move the decimal two places to the left. 74 cg= .74 g
22.0 g of silver chloride contain 0,918.10e23 molecules.
26.3 g of calcium hydroxide contain 2,054 molecules.
32 g SO2 x 1 mole SO2/96 g x 6.02x10^23 molecules/mole = 2.0x10^23 molecules
To find the number of moles in 74 g of KCl, you first need to calculate the molar mass of KCl. The molar mass of KCl is approximately 74.55 g/mol. Then, divide the given mass by the molar mass to get the number of moles: 74 g / 74.55 g/mol ≈ 0.993 moles.
The answer is 1,57.10e27 molecules.
1,4.10e23 molecules
2
There are 3.34 x 10^22 molecules of H2O in 1.0 g of water.
0,34 g HCl contain 5,6.10e21 molecules.
The answer is 1,357.10 ex.23 molecules.
There are around 19.4*1023 molecules in 155.25 g of ozone. Its molecular weight is 48.