4.27 x 10^-3 (sodium dihydrogen phosphate)
2006-11-13 16:46:55 · 5 answers · asked by Legend 4 in Science & Mathematics ➔ Chemistry
sorry.. in grams
2006-11-13 16:50:17 · update #1
4.27 x 10^-3 g NaH2PO4
the molar mass of NaH2PO4 can be found by using the masses from the elements on the periodic table
23 + 2(1) + 31 + 4(16) = 120 g/mol
this value is used to convert
4.27 x 10^-3 g NaH2PO4 x (mol / 120 g) = 3.56 x 10^-5 moles NaH2PO4
2006-11-13 16:52:53 · answer #1 · answered by scurvybc 3 · 0⤊ 0⤋
Sodium Dihydrogen Phosphate is NaH2PO4.
The number of moles is calculated by (mass / relative molecular mass). Relative molecular mass is just the relative atomic masses of all the atoms in the molecule.
Relative molecular mass of NaH2PO4
= 1x23 + 2x1 + 1x31 + 4x16
= 120
Therefore, number of moles of NaH2PO4
= (4.27 x 10^-3) / 120
= 3.56 x 10^-5 (3 s.f.)
2006-11-14 01:06:09 · answer #2 · answered by donteatflowers 2 · 0⤊ 0⤋
The general formula you need to play with is PV=nRT
P = Pressure
V = Volume
n = number of moles of the substance
R = molecular constant of the substance
T = Temperature
You need to be more specific about the rest.
2006-11-14 00:52:00 · answer #3 · answered by teef_au 6 · 0⤊ 0⤋
um.. the moles is a unit.
get the mass, weight, whatever ur trying to get, and add it all up, then compare that to the mole of the compound
2006-11-14 00:50:38 · answer #4 · answered by jdak34 3 · 0⤊ 0⤋
Um, units.............?
2006-11-14 00:48:57 · answer #5 · answered by poorcocoboiboi 6 · 0⤊ 0⤋