Friday
December 13, 2013

# Posts by kendra

Total # Posts: 209

General Chemistry
3.71 When potassium cyanide (KCN) reacts with acids, a deadly poisonous gas, hydrogen cyanide (HCN), is given off. Here is the equation: KCN(aq) + HCl(aq) -> KCl(aq) + HCN(g) If a sample of 0.140 grams of KCN is treated with an excess of HCl, calculate the amount of HCN fo...

General Chemistry
Balance the following equations: a. C + O2 CO b. CO + O2 CO2 c. H2 + Br2 HBr d. K + H2O KOH + H2 e. Mg + O2 MgO please explain and show work.

General Chemistry
So do I multiply 6.022 x 10 23. By .00035

General Chemistry
Thank you I did the first part but I am still confused about how to do b. Is a mole a molecule then does the # of moles = .469/134. If so what do I do with the 1 mole 6.022x10 23. What does the proportion look like?

General Chemistry
Cinnamic alcohol is used mainly in perfurmery, particularly in soaps and cosmetics. Its molecular formula is C9H10O. a. Calculate the percent composition by masss of C, H, and O in cinnamic alcohol. b. How many molecules of cinnamic alchol, not acid ,are contained in a sample...

General Chemistry
Cinnamic alcohol is used mainly in perfurmery, particularly in soaps and cosmetics. Its molecular formula is C9H10O. a. Calculate the percent composition by masss of C, H, and O in cinnamic alcohol. b. How many molecules of cinnamic alchol, not acid ,are contained in a sample ...

General Chemistry
Calculate the number of C atoms, H atoms, and O atoms, in 1.50 grams of glucose (C6H1206). I do not understand how to calculate this. Please explain and post the correct answers.

General Chemistry
Jazz. Can you give show me how to solve for cinnamic alcohol and not acid?

General Chemistry
Cinnamic alcohol is used mainly in perfurmery, particularly in soaps and cosmetics. Its molecular formula is C9H10O. a. Calculate the percent composition by masss of C, H, and O in cinnamic alcohol. b. How many molecules of cinnamic alchol are contained in a sample of mass 0.4...

General Chemistry
Calculate the number of C atoms, H atoms, and O atoms, in 1.50 grams of glucose (C6H1206). Please explain and exact example of how to do this and what the correct answers are.

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