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1. Calculate the molarity of CaSO4 solution if 124.5g are dissolved in 124mL of solution.
a. 7.32m
b. 7.32 x 10^-3m
c. 136m
d. 8.75m
2. What is the name of HBr?
3. When a sample of MG3N2 reacts with H2O, the theoritcal yield of NH3 should be 23.6g. if 15.0g of NH3 actually forms during a reaction, what is the % yield? Mg3N2 -> 6H2O -> 3Mg(OH)2 + 2NH3
a. 21.2%
b. 63.6%
c. 50.0%
d. 20.0%
Find out the morality of KMnO4 when the mass of the Fe-ASH sample is 1.0913 g, and the volume is 32.1mL
solution of a weak monoprotic acid, pKa 2.346, is mixed with 37.3 ml of 0.0832M sodium hydroxide. What is the pH of the resulting not a simple buffer solution?
An unknown solid mixture containing benzoic acid,copper(II)sulfate and sand. She added 15mL.of acetone to her sample. Which component of the mixture dissolved in the acetone?
Consider a buffer that is 0.155 M in lactic acid and 0.155 M in sodium lactate. What is the pH of the buffer after the addition of 0.0190 mol of LiOH to 1050. mL of buffer. You may assume that there is no volume change upon addition of the base. p..
Explain how many moles are in 50 ml of a sodium hydroxide solution which was made from 1.2g sodium hydroxide of about 0.1 mol*L-1and 300ml H2O
Therefore the formula is N2O4 Dinitrogen tetraoxide. Recognizing Incorrect Names and Formulas of Explain what is wrong with the name of formula in the second.
If a reaction vessel initially contains only CO and NH3 at concentrations of 1.00 Mand 2.00 M, respectively, what will the concentration of HCONH2 be at equilibrium
Excitation of the 3s electron from Mg+ to a 3p orbital occurs at 280.0 nm. The probability of filling a 3p orbital relative to the 3s orbital is 3/1. Assuming that the total Mg+ population in a given atomization source is 3.5 x 10^18 ions at any g..
When D2 reacts with ethylene in the presence of a finely divided catalyst, ethane with two deuteriums, CH2D-CH2D, is formed. (Deuterium, D, is an isotope of hydrogen of mass 2.)
Calculate the force needed to bring a 900 kg car to rest from a speed of 95.0 km/h in a distance of 100 m (a fairly typical distance for a nonpanic stop).
How much limestone must be decomposed by heating to produce 250.0 grams of lime, CaO?assuming that the limestone contains 95.0% pure CaCO3.
a solid with an irregular shape and a mass of 11.33 g is added to a graduated cylinder filled with water
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