Wednesday
May 22, 2013

# Posts by connie

Total # Posts: 200

Chemistry
the molar mass of CopperII Nitrate CU(NO3)2 is _________grams Ok so I 1. Cu= 63.55 2. N=14.01 3. 0= 6 X 16.00=96 I get 96.+14.01+63.55? =173.56 Answer is 188 grams? What did I do wrong? Thank You

Chemistry
To convert the number of moles of H20 to moles of NH3? 1. H=2(1.008)= 2.01 2. 0=1(16.0) = 16.0 Total = 18.01 =# of moles of H20???? then what do I do Am I doing it right so far? thank you!

chemistry
How many grams of MgO are produced when 40.0grams of 02 react with Mg? 2mg+O2--->2mgO Could you please set the problem up? I think the answer is 101, but I do not know how to get that answer. Thank you

Chem
How many grams of N2 are produced when 125g of NH3 reacts by the following? 4NH3+6NO--->5N2 +6H20 I know the answer but I do not know how to do the problem. The answer in the book is 257g But what do I do? I am not even sure where to start? Thanks

Chemistry
Plot data, preform interpolations or extrapolations, determine slope of best line, determine y intercept. Write equation of the line. T in Kelvins40.0 70.0 100.0 120.0 0 V in ml 250.0 430.0 610.0 730.0 0 Value of V at T= 50.0? Value of T when V= 800.0? 1.So, I made a graph wit...

chemistry
What are the joules needed to melt 50.0g of ice at 0 degree C and to warm the liquid to 65.0 degree C? Thank you so much!

Chem >Jai
Posted by Connie on Saturday, September 10, 2011 at 10:36am. What is the amount of energy of calories to heat 8.5g of water from 15 C to 36 C? I think you take 8.5g x 21 degree C, but then I am stuck. Thank you Chem - Jai, Saturday, September 10, 2011 at 10:50am amount of ener...

Chemistry
What are the joules needed to melt 50.0g of ice at 0 degree C and to warm the liquid to 65.0 degree C? Thank YOu

Chem
Energy needed to keep a 75w bulb burning for 1 hour = 270kj Calculate energy neede to keep it burning for 3 hours? In J and kcal? I got the J: It is 270kj x 1000/1 x 3/1 = 810000=8.1 x 10^5J But How Do I get the kcal? Thank you

Chem
What is the amount of energy of calories to heat 8.5g of water from 15 C to 36 C? I think you take 8.5g x 21 degree C, but then I am stuck. Thank you

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