Posts by kkk
Total # Posts: 27
KILL ALL THE BLACKS
1. C 2. C or B...both are correct 3. A 4. A 5. D 100% I promise :)
How many moles of NaOH can be added to 1L solution 0.1M in NH3 and 0.1 M in NH4Cl without changing the POH by more than 1 unit kb NH3 = 1.8 into 10^_5
m=70kg(1kg/1000m3) =.07m3 A=2m sq. =4m H=V/A h=0.07m3/4m2 =0.018m or 1.8cm
What is the pH of a solution with [H3O+] = 1 x 10-9 M? My answer is pH=9. is that correct
How many moles of magnesium are needed to react with 16 g of O2? 2 MgO (s) + O2 (g) → 2 MgO (s)
At the city museum, child admission is $5.40 and adult admission is $8.70 . On Thursday, three times as many adult tickets as child tickets were sold, for a total sales of $693.00 . How many child tickets were sold that day?
Delft Solar Cell
how can I get to the answers for this question
Your team performed replicate analyses of a sample and obtained an average 18.54 mM concentration with a relative standard deviation of 4.0%. If you later discover that a systematic error was made by a factor of 2 and the mean concentration should have been 9.27 mM, what is ...
Two trains, each having a speed of'34 km,/h, are headed at each other on the same straight track. A bird that can ﬂy 58 km /h ﬂies oﬁ" the front of one train when they are 102 kmapart and heads directly for the other train. On reaching theother ...
why do you need to construct a calibration curve when doing spectrophotometric determinations? Is it not possible to obtain the concentration of the unknown solution by simply getting the extinction coefficient of the species under study and then determine its concentration in...
what is the significance of partial molar enthalpy of mixing? I tried to search the net but I did not get anything. I also tried to look at our textbook, which by the way, is by Peter Atkins but I find it insufficient. Please help me...
how can i get the critical temperature of CO2 given a set of data which consists of surface tension and density at different temperatures. The table looks like this: T(oC) density surface tension 0 0.927 4.50 20 0.772 1.16 I really need some help about this...please...
length x width = area (b+8) x b = area (b^2)+(8b)= area hope this helps...:D
how will I be able to form the cis,trans and the cis,cis isomers of dibenzalacetone?
why is the trans-trans isomer of dibenzalacetone the most stable isomer?
Sounds good. Thanks for the insight
How far of the Taurus form Earth?
kill the black