General Chemistry Answers

Find the percent by mass of oxygen (O) in potassium chlorate, KClO3.

Balance the following redox equation by the ion-electron method: (in acidic solution)

H₂O₂ + Fe²⁺ --> Fe³⁺ + H₂O 

(electrochem)

1)Half Reactions 2)Oxidizing Agent 3) Reducing Agent

Oxidation: (Element) (Element)

Reduction:

a.   2Sr + O₂ à 2SrO =

b.   2Li + H₂ à 2LiH=

c.   2Cs + Br₂ à 2CsBr=

d.   3Mg + N₂ à Mg₃N₂₌

 (electrochemistry)

How many grams of glucose, C6H12O6 would you need to prepare 2.0 l of 2% glucose solution

A solution of hydrochloric acid in water is 60.0% HCl and 40% water, H2O, by weight. The solution has a density of 1.19 g/mL. What is the

a. molarity of hydrochloric acid (with water as the solvent)?

there are 1.699E22 atoms in 1.000 g of chlorine. Assume that chlorine atoms are spheres of radius 0.99 Å (Angstrom) and that they are lined up side by side. How many miles in length is the line of chlorine atoms? *

Pb(NO3)2 + 2 NaI = PbI2 + 2 NaNO3

6.Suppose in the reaction in which 100 grams of lead(II) nitrate were all used up and only 100 grams of lead(II)iodide were obtained in the experiment, what is the percent yield?

7.How many grams of the product were formed in no. 6 if the percent yield is 80%?

Pb(NO₃)₂ + 2 NaI = PbI₂ + 2 NaNO₃ 

Suppose in the reaction in which 100 grams of lead(II) nitrate were all used up and only 100 grams of lead(II)iodide were obtained in the experiment, what is the percent yield? 

Pb(NO₃)₂ + 2 NaI à PbI₂ + 2 NaNO₃ 

If 100 grams of lead (II) nitrate were used in the reaction, how many grams of sodium iodide were used for a complete reaction? 

Pb(NO₃)₂ + 2 NaI = PbI₂ + 2 NaNO₃

How many moles of lead (II) iodide were produced when 5 moles of lead (II)nitrate were used in the reaction?