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  1. I will do the work here, then explain it: 1.99 mole Zn * (6.022 * 10^23/ 1mole.... In order to find the number of atoms in 1.99 moles of Zn, multiply that number by Avogadro...

    1 Answers · Science & Mathematics · 16/12/2012

  2. MV = mass / molar mass (0.55 mol/L) (1.99 L) = x / 40.0 g/mol x = 43.78 g Rounded off to two sig figs, 44 g

    1 Answers · Science & Mathematics · 09/10/2012

  3. a mole is 6.022 x 10^23 particles. particles include atoms or molecules. so in this example we divide 1.99 x 10^25 by 6.022 x 10^23 = 33.0 mol

    1 Answers · Science & Mathematics · 09/07/2010

  4. Mg + 2 HCl → MgCl2 + H2 (1.99 g Mg) / (24.30506 g Mg/mol) = 0.081876 mol Mg (0.1000 L...

    1 Answers · Science & Mathematics · 30/10/2012

  5. ...mol KI / 166.0028g) = 0.0119877 mol KI Notice that the grams cancel and you're left with moles. Also, make sure to have the right significant digits (3), which I did not do for you.

    2 Answers · Science & Mathematics · 24/05/2011

  6. Since -log(Kb) = pKb, Kb = 10^-pKb. Kb = 10^-12.01 Kb = 9.77 x 10^-13 Hope this helps.

    1 Answers · Science & Mathematics · 26/05/2010

  7. 92 U 235 + 0n1 ===> 40 Zr 99 + 52 Te 135 + 2 0n1 The atomic numbers must balance on each side. The atomic mass numbers must balance on each side.

    1 Answers · Science & Mathematics · 18/10/2011

  8. really.... 3 grams of it...... all you have to do is divide -1.99/3..... there are 3 grams total... per gram ...

    1 Answers · Science & Mathematics · 14/04/2011

  9. ... for Oxygen is 2. In reality, 1.99 is almost the same with 2. But 2.01 is bigger than 2...

    1 Answers · Science & Mathematics · 23/04/2012

  10. ...of the partial pressures of each individual gas in the mixture. 77.7 + 19.94 + 1.99 = 99.68kPa. What is the kiloPascal?. The...

    4 Answers · Science & Mathematics · 19/06/2009

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