What volume of a 0.170 M potassium hydroxide solution is required to neutralize 28.3 mL of a 0.125 M hydrobrom?
What volume of a 0.170 M potassium hydroxide solution is required to neutralize 28.3 mL of a 0.125 M hydrobromic acid solution?2 AnswersChemistry8 years ago
Directions: First make a substitution and then use integration by parts to evaluate the integral.
definite integral [1,4] ∫ e^(sqrt(x))
Answer is: 2*E^Sqrt[x]*(-1 + Sqrt[x])
I don't understand this, please show me step by step on what you are substituting first and then how you are integrating that by parts...5 AnswersMathematics9 years ago
What changed from the 1940’s to the 1950’s in the US that allowed for non-violence protesting in the us.?
why was it viwed to be unpatriotic prior to the 1950's???
What events influned this change???1 AnswerHistory1 decade ago
The base of a solid is the region in the first quadrant bounded by the y-axis, the graph of y = tan^(-1)X the horizontal line y= 3 and the vertical line X = 1. For this solid, each cross section perpendicular to the X-axis is a square. What is the volume of the solid?
I think it could either be: 2.5 ... 6.6 .... 8.0 .... 8.7 ... or maybe 20.72 AnswersMathematics1 decade ago
At 25 degrees C, the solubility product constant, Ksp, for strontium sulfate, SrSO4, is 7.6x10^(-7). The solubility product constant for Strontiumfluoride, SrF2, is 7.9 x 10^(-10).
(a) molar solubility of SrSO4 in pure H20 at 25 degrees C.
(b) molar solubility of SrF2 in pure H20 at 25 degrees C.
(c) an aqueous solution of Sr(NO3)2 is added slowly to 1.0 liter of a well-stirred solution containging .02 mole F- and .1 mole So4 at 25 degress C (You may assume that the added Sr(NO3)2 slution does not materiealy affect the total volume of the system)
1. which salt percipitates first?
2. what is the concentration of strontium ion Sr^(2+) in the solution when the first precipitate begins to form?
(d) assume more Sr(No3)2 is added to the mixture in (c) a second percipitate begins to form. At the stage, what percent of the anioin of the first precicpiate remains in the solution?
(a) x= 8.7 x 10 ^( -4)
(b) x= 9.2 x 10 ^( -4)
A(g) + B(g) ---> C(g) + D(g)
For the gas-phase reactions above, the following experimental data were obtained.
Intial [A] _______Intial [B]_______Inial Rate
1.) .033 _____ .034 _____ 6.67x10^ -4
2.) .034 _____ .137 _____ 1.08x10^ -2
3.) .136 _____ .136 _____ 1.07x10^ -2
4.) .202 _____ .233 _____ ???
(a.) Determine the order of the reactionwith respect to reactant A. Justify your answer.
(b.) Determine the order of the reaction with respect to reactant B. Justify your answer.
(c.) Write the rate law for the overall reaction.
(d.) Calculate the rate for experiment # 4.2 AnswersChemistry1 decade ago
what product is formed at the anode when molten sodium cholride, NaCl is electeolyzed using a downs cell?
What is a downs cell.
does this have to do witht the charges??
2.) The remnants of a prehistoric fire in peru showed a carbon 14 decay rate of 3.1 counts/min. The decay rate of carbon-14 in fresh wood is 13.6 counts/min. The half-life of carbon-14 is 5730 years.
A. What is the decay constant for Carbon-14 (t1/2 = 5730) ?
B. How old are the fire remnants?