as was here the moles (n)?

up 1 .. reaction: 2 Na (s) + 2 H2O (l) -----> H2 (g) + 2 NaOH (aq) 2. Molar masses M [g / mol] specify (rounded figures!) 2 + 23 g / mol 18 2 g / mol 1 * 2 g / mol 40 2 g / mol

  1. Fabric portions m [g] write down: 0,184 g 0,144 g 89.6 mL xg = 0.089 g / L * 0.08961 = 0.008 L g
  2. Amount n [mol] calculate: 0.004 mol 0.004 mol 0.004 mol

n = m / M takes 0,184g hot divided by 2 + 23g / mol were 0,184 divided by 24. Since coming but 23 ^ 3000 out and are no 0,004mol as in Lösung.Kann me maybe someone so I explain that too understand?

The best answer

The reaction equation is correct.

The molar masses of the individual substances (You need the periodic table):

Na: 23 g / mol; H₂O: 18 g / mol; H₂: 2 g / mol; NaOH: 40 g / mol

The fabric portions: The have not been given from you. I'm therefore a mass of materials of the molar masses (see above).

The amount of material n: This here is the same as the coefficient for the individual substances in the adopted by me food servings. So for example for sodium is here n = 2 mol.

If other material portions are given, then the relationship you mentioned n = m / M.

The thing is not really understandable. For example, what does the line

Fabric portions m [g] write down: 0,184 g 0,144 g 89.6 mL xg = 0.089 g / L * 0.08961 = 0.008 L g

Mir does not open up the.

Date: 2013-02-26 Views: 0
Tags: Chemistry mol

Related articles

Links

Domicile|Sante|

Copyright (C) 2018 m3tch.com, All Rights Reserved.

M3tch all rights reserved.

processed in 1.072 (s). 10 q(s)