30.0g of N_(2)CSH_(2)Cl is mixed with a 1.00L.solution of 0.100MN_(2)CSH. If 0.200 mol of NaOH is added, what will be the final pH? N_(2)CSHKb=6.1^ast 10^-6
What variable determines which "R" value you use in your calculation? moles (n) pressure (P) volume (V) temperature (T)
If E^circ (red) of a given half-cell is more negative than E^circ (red) for a standard hydrogen electrode, the half-cell will: A & tend to oxidize. B & tend to reduce. C & be at equilibrium. D & Not enough information is given.
Pb_(3)PO_(4) has a molar solublity of 3.0^ast 10^-23 What is the molar solubility in a solution of 0.0230MNa_(3)PO_(4) Answer
A container has 9.0 ml of liquid X with a density of 1200kg/m^3 How much liquid Y with a density of 1400kg/m^3 should be added to the flask so that the density of the liquid mixture is 1280kg/m^3 3.5 ml 6.0 ml 6.4 ml 8.7 ml
Question 26 (2 points) Which of the following will cause the rate of a reaction to increase? Decreasing reactant concentration Removing a catalyst Decreasing the temperature None of the above will increase reaction rate
Find the pH of a 0.0153 M solution of hypochlorous acid. (The value of K_(a) for hypochlorous acid is 2.9times 10^-8 Express your answer using two decimal places. pH=square
What does SDS stand for? Safety Data Sheets Standard Systems Solutions Saturated Diluted System Super Dynamic Suds
What is the name for BaCl_(2) A. Barium chlorine B. Monobarium dichloride C. Barium dichloride D. Barium chloride
What is the chemical formula for copper(II)phosphate? Cu_(2)PO_(4) CuPO_(4) Cu(PO_(4))_(3) Cu_(3)(PO_(4))_(2)
What is the major ion in seawater? sodium chloride magnesium sulfate
5. How can 100. mL of sodium hydroxide solution with a pH of 13.00 be converted to a sodium hydroxide solution with a pH of 12.00 ? (A) By diluting the solution with distilled water to a total volume of 200 mL (B) By diluting the solution with distilled water to a total volume of 1.00 L (C) By adding 100 mL of 0.10 MHCI (D) By adding 100 mL of 0.10 MNaOH
12. How does the concept of electron transfer explain why sodium and chlorine react to produce sodium chloride?(Hint: Think about the movement of electrons between sodium and chlorine atoms during the reaction.)
2. Use Passage 1 to answer question below. Suppose that in Experiment 2 a solution at a pH of 7.5 had been tested. Based on the results of Experiment 2, the percent recovery of cadmium for that solution would most likely have been: F. between $48\% $ and $80\% $ G. between $80\% $ and $88\% $ H. between $88\% $ and $95\% $ J. between $95\% $ and $100\% $ F G. H. J.
1.Use Passage 1 to answer question below. Based on the description of Experiment 1, when was the graphene separated from the sample liquid by centrifugation? A. Immediately before placing the sample in the water bath B. Immediately after removing the sample from the water bath C. Immediately before the percent recovery of the cadmium was determined D. Immediately after the percent recovery of the cad- mium was determined A B C D
Which statement about asbestos fibers is correct? A. All asbestos fibers are visible without magnification B. Asbestos fibers can be identified by color and texture alone C. Some asbestos fibers are extremely small and require laboratory testing to confirm their presence D. Asbestos fibers are always thicker than a human hair
Which of the following statements describes how water differs greatly from many other substances? It is less dense in its solid form than liquid form. It is a polar covalent molecule. It can change to solid liquid and gas phases. It is comprised of two different elements.
Name the following ionic compounds. Make sure you are in text mode $(''Tt'')$ Do NOT put a space between metal and charge in parentheses if naming a Type II metal ionic compound (i.e. iron(III)) a. $CoCl_{2}$ $\square $
3. How many grams of $Fe_{2}(SO_{4})_{3}$ will be produced from 4.25 moles of Fe? $2Fe+3H_{2}SO_{4}\rightarrow 1Fe_{2}(SO_{4})_{3}+3H_{2}$
Red litmus paper turning blue indicates the prescence of __ ? $Ni(II)$ $Ca(II)$ $Fe(III)$ Ammonium Ion
