1 mole Na = 6.022 x 1023 atoms Na
0.200 mole Na x (6.022 x 1023 atoms/1 mole Na) = 1.20 x 1023 atoms Na
2.00 g Na x (1 mol Na/22.99 g Na) x (6.022 x 1023 atoms Na/1 mol Na) = 5.24 x 1022 atoms Na
1 mole = 6.022 x 1023 atoms
2.0 mol Na x 6.022 x 1023 atoms Na/mol Na = 1.2 x 1024 atoms Na
2000 atoms Na 2000 atoms Na
How many atoms of gallium are in 2.85 x 103 g of gallium?
2.00 moles sodium (6.022 X 1023/1 mole Na) = 1.20 X 1024 atoms of sodium ---------------------------------------
1mol Na in grams = 22.989770g 1mol Na atoms = 6.022 x 1023 atoms 1 x 1020 atoms Na x 1mol/6.022 x 1023 atoms x 22.989770g/mol = 0.004g Na (rounded to one significant figure)
two or three
[348 (g NACl)] * [23 (g/mol Na)] * [1 (mol NaCl/mol Na)] / [58.5 (g/mol NaCl)] = [348*23/58.5] = 136.8 = 137 g Na
There are 1.41 e24 atoms of Na in 2.35 mol of NaCl.
1 mole = 6.022 x 1023 4.8mol Na x (6.022 x 1023 atoms Na/mol Na) = 2.9 x 1024 atoms Na
1.13x10^23
32.7 g x 1 mol/22.99 g = 1.422 mol x 6.022x10^23 molecules/1mol = 8.565 x 10^23 molecules(also called atoms)
the constant Mole (mol): 6.02 x 10^23 are how many atoms you have per mol so the answer can be 7 mol atoms or 6.02 x 10^23 atoms per mol x 7 actual answer is 4.214 X10^24 atoms in 7 mol
How many atoms of gallium are in 2.85 x 103 g of gallium?
Use this fomula: (m/M)*NA in which m is mass in gram (g), M is molar mass (g/mol) and NA is the Avogadro number (mol^-1)
The definition of one mole is: It is a number (eg. of particles of any kind), like pi is a number (of ratio from diameter to circle).It is a very big number, symbolised as NA (and named after Avogadro):NA = 6.022 * 1023 (-/mol) or (mol-1)So there are 1.62 * NA = 9.76 * 1023 atoms in a mole(it is not important of what kind the atoms are).
2.00 moles sodium (6.022 X 1023/1 mole Na) = 1.20 X 1024 atoms of sodium ---------------------------------------
The amount of moles is also defined as n = N/NA, wheren - amount of molesN - amount of atomsNA - Avogadro constant (approx. 6.02214179×1023 mol-1), thereforeN = n×NA = 0.263×6.02214179×1023 = 1,583823291×1023 atoms.
you have m = 12.5g M = 107.9g/mol Na = 6.02x10^23atoms/mol = avagadros number N = ? atoms then the number of moles is n = m/M = N/Na gives N = mNa/M = 12.5*6.02x10^23 / 107.9 = 6.97 x 10^22 atoms
1mol Na in grams = 22.989770g 1mol Na atoms = 6.022 x 1023 atoms 1 x 1020 atoms Na x 1mol/6.022 x 1023 atoms x 22.989770g/mol = 0.004g Na (rounded to one significant figure)