One mole of any element, including manganese (Mn), has 6.022 x 1023 atoms of that element.
pure substances have a molarity of 1. but, if you need a calculation, you could start with the definition of molarity (M) is grams of solute/molar mass of solute x liters of solution, there is some missing information for this problem to be solved as a solution but with a conversion factor, you should be able to find an answer. Moles (n) can be calculated as follows: 68.7 g Pb (n/207.1g) = .332 mol Pb 117 g Sn (n/118.7g) = .989 mol Sn density: d = m/v = g/mL lead 11.34  g·cm−3 tin 7.31 g/ml these conversions can be put into the analysis equation and should be able to solve.
Example for sodium chloride, NaCl: - Search the atomic weights of sodium and chlorine in atomic weight tables Na = 22, 989 77; Cl = 34,968 85 - Calculate the molecular weight of NaCl: Na + Cl = 57, 958 62. - Calculate the percentage of sodium: 57,95862 g NaCl------------22,98977 g Na 100 g NaCl--------------------x g Na x=22,98977.1oo/57,95862 = 39,66583 %
989 meters = 0.614536109 miles.
There are infinitely many numbers between 940 and 989. One example is 942.32657
989 = CMLXXXIX
61.8125 times
None.
247.25 times.
1, 23, 43, and 989
48% of 989 is 474.72
989 + 657 = 1646
0.0546
989 = 23 x 43
989 x 5 = 4945