Saturday
April 19, 2014

Posts by Valentina


Total # Posts: 20

Math
Mr. Singh deposited $170 in his bank. The number of $5 bills was three times the number of $10 bills and the number of one dollar bills was 30 more than the number of five dollar bills how many bills of each type did he deposit

education
In a minimum of 300 words, discuss at least five selection criteria you would use to “weed” the sites, explaining why you chose the criteria you

chemistry
A 0.194 g sample of compound is vaporized to fill a 100.0 mL vessel at 750. torr and 100.C. What is the molar mass and molecular formula?

Math
44% off of $158

English
Thanks so much it was on our homework.... Our teacher said that she would give us a break so she gave us a sheet of word puzzles.

English
Figure out this word l_d_bu_ Please Help Me!!!!!!!!!!

Math
What is the volume of a cone with a radius of 3 cm and a height of 6 cm? I can't get this one right for some reason!

Chemistry.
Which of the following changes will increase the amount of solid solute able to be dissolved in a liter of liquid water? decreasing pressure increasing temperature decreasing temperature increasing surface area

chemistry
How many grams of Lead (II) Nitrate are required to make a 350mL solution of 2.5M Pb2+?-

chemistry
if you react one mole of sodium hyrdoxide with excess copper(II) sulfate, how many moles of copper(II) hydroxid are produced?

chemistry
if 2.7 moles od sodium carbonate reacts with 5 moles of copper(II) sulfate, how many grams of sodium sulfate will be produced?

chemistry
if 25 grams of copper reacti with 70 grams of sodium carbonate, identify the limiting reagent.

chemistry
If 2 moled of copper(II) sulfate react with 3 moles of sodium carbonate, identify the limiting reagent.

chemistry
write a balanced equation for the reaction of copper(II) sulfate with sodium carbonate to produce copper(II) carbonate and sodium sulfate

chemistry
Explain what a limiting agent is and how to identify it

chemistry
what are the theoretical mole ratios of copper(II) hydroxide and sodium sulfate?

chemistry
Explain how to make a 1.5M solution of copper (II) sulfate with a volume of 250 mL.

chemistry
Why will a new nail react faster in copper sulfate solution than an old, rusty nail?

chemistry
If you submerge a silver teaspoon in copper sulfate solution, what reaction would you expect and why?

Country Reports
dont know but i got iceland for my report 2!

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