To find the number of moles in 45 grams, you need to know the molar mass of the substance in question. The formula to calculate moles is: moles = mass (g) / molar mass (g/mol). For example, if the substance has a molar mass of 18 g/mol (like water), then 45 g would equal 2.5 moles (45 g / 18 g/mol = 2.5 moles). Without knowing the specific substance, the calculation cannot be completed accurately.
To find the number of moles of water in 45 grams, you can use the molar mass of water (H₂O), which is approximately 18 g/mol. By dividing the mass of water (45 g) by its molar mass (18 g/mol), you get: 45 g ÷ 18 g/mol = 2.5 moles of water. Thus, there are 2.5 moles of water in 45 g.
To determine the number of molecules in 45 g of silver, you first need to calculate the number of moles of silver using its molar mass (107.87 g/mol). Then, you can use Avogadro's number (6.022 x 10^23) to convert moles to molecules.
45/94.2 is 0.4777 moles
978 g calcium contain 24,4 moles.
29,0 g of calcium is equal to 0,723 moles.
To find the number of moles of water in 45 grams, you can use the molar mass of water (H₂O), which is approximately 18 g/mol. By dividing the mass of water (45 g) by its molar mass (18 g/mol), you get: 45 g ÷ 18 g/mol = 2.5 moles of water. Thus, there are 2.5 moles of water in 45 g.
To determine the number of molecules in 45 g of silver, you first need to calculate the number of moles of silver using its molar mass (107.87 g/mol). Then, you can use Avogadro's number (6.022 x 10^23) to convert moles to molecules.
45/94.2 is 0.4777 moles
The formula is: number of moles = g Be/9,012.
27.4 g H2O x 1 mole/18 g = 1.52 moles
14,84 g magnesium are equivalent to 0,61 moles.
97,5 g of oxygen is equal to 5,416 moles.
978 g calcium contain 24,4 moles.
67,4 g HCl is equivalent to 1,85 moles.
29,0 g of calcium is equal to 0,723 moles.
573,28 of g of AgCI is equivalent to 4 moles.
First of all we convert the mass of leadto moles. Using the equation moles = mass(g) / Ar (Realtive atomic Mass)_. Mass( g) = 45 g Ar =~ 207 (Periodic Table). Hence moles(Pb) = 45 x 207 Moles (Pb) = 9315 moles. Next using the Avogadro number. 1 moles(of A SUBSTANCE) contains 6.022 x 10^(23) atoms. Hence number of atoms in 9315 moles = 9315 x 6.022 x 10^(23) = 5.61 x 10^(27) atoms. As a 'silly' number. 5,610,000,000,000,000,000,000,000,000 atoms.