# Yahoo Web Search

1. ### can anyone help me balance this equation/?

Ca + 2H2O ------> Ca (OH)2 + H2 It's a simple...

7 Answers · Science & Mathematics · 12/02/2010

2. ### HELP ASAP! If 62.8 g Ca react with 92.3 g HCl according to the reaction below, how many grams of hydrogen gas?

Balance the equation Ca + 2HCl -------> CaCl2 + H2 moles = mass / molar mass...to fully react So moles HCl needed to react all the Ca = 2 x moles Ca = 2 x 1.5669 mol = 3.1338 mol HCl ...

1 Answers · Science & Mathematics · 02/03/2011

3. ### Choose the paramagnetic species from below?

Ca 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2----> [Ar] 4s^2 paired electron...

2 Answers · Science & Mathematics · 14/11/2011

4. ### what is the product of this reaction?

Ca (CH3COO)2 + 2 HCl = 2 CH3COOH + CaCl2 The products are ethanoic acid (acetic acid) and calcium chloride.

1 Answers · Science & Mathematics · 02/04/2012

5. ### Calculate the pH of a 0.020 M solution of Ca (OH)2 whose temperature is 25.0 °C?

Ca (OH)2 is a strong base and completely dissolves into: Ca (OH)2 -> Ca +2 + 2 OH-. For every 1 Ca (OH)2 you will get 2 ...

2 Answers · Science & Mathematics · 19/10/2011

6. ### A 0.2360-g sample of impure Ca (OH)2 is dissolved in enough water to make 53.60 mL of solution. 20.00 mL of the?

Change grams of Ca (OH)2 to moles, then divide over 0.05360L to get M... of Ca (OH)2 0.020L x 0.05943mol/L = 0.001188 mol Ca (OH)2 17.04ml of 0.1269M HCl was needed to...

2 Answers · Science & Mathematics · 13/09/2012

7. ### Help with finding the molarity of Ca (OH)2?

Because Ca (OH)2 dissociates to give: Ca (OH)2 ↔ Ca2... 0.034M OH- ions. This means that for Ca (OH)2 you should have 0.017M Ca2+ions. Molarity...

2 Answers · Science & Mathematics · 02/04/2011

8. ### Why does Ca (0.197 nanometer) have a larger radius than Ca (+2) (0.099 nanometer)?

Ca has the electron configuration of 2.8.8.2 Lose the two valence ... by r=pxn^2 where n is the number of the period. So in Ca the valence electrons are at a distance of 16xp; in the Ca ^2...

2 Answers · Science & Mathematics · 25/11/2010

9. ### What does H2O + Ca make????

Ca (s) + H2O(l) produces Ca (OH)2+ H2(g) Calcium Hydroxide, ie. Ca (OH)2 is a base which is only slightly soluble in water. H2...

17 Answers · Science & Mathematics · 06/08/2006

10. ### Can someone balance this equation? Ca (OH)2 + HNO3 + Ca (NO3)2 + H2O? Please explain. thanks so much.?

start with this __ Ca (OH)2 +__ HNO3 → __ Ca (NO3)2 +__ H2O next pick...put a 1 in front of the molecule containing Ca on the left. 1 Ca (OH)2 +__ HNO3 → __ Ca (NO3)2 +__ H2O now you...

5 Answers · Science & Mathematics · 09/03/2008