Tuesday
December 10, 2013

# Posts by Monique

Total # Posts: 280

Math
Four couples have purchased ticket to the school play. Their sear are next to one another in a single row. If each couple sits side by side, how many seating arrangements are possible? (I came up with 24. correct??)

Chemistry
When the following equation is balanced with the smallest integral coefficients, the coefficient of the HNO3 is Li2CO3(s) +HNO3(aq) -- LiNO3(aq)+H2O(l)+CO2

Chemistry HELP
Calculate the number of molecules in 3.11 mol of CCL4 I got 2.88E26 am I correct

Chemistry
I don't understand how to work this problem can you help

Chemistry
How many CO2 molecules can be made with 0.500 mol of oxygen atoms?

Chemistry
Calculate the number of molecules in 3.11mol of CCL4 this is what I'm doing I got the molecular weight of CCL4 which is 181.88 Then I set it up like this 3.11 mol CCL4/ 181.88 mol CCL4 x 6.022E23 = 1.03E22 Am I right

Chemistry
I did Zn(2)=65.39 then I divided that by the amu of Zn(NO3)2 x 100 is that right

Chemistry
What is the percent zinc in Zn(NO)3 2xZn/189.41]=34.52% am I right

Chemistry
What is the formula mass for (NH4)3PO4

Math
why adding 1=I Rather then 1-i

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