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How many grams are in 2.35 moles of N2? How many grams are in 2.35 moles of NaBr? How many grams are in 2.35 moles of C6H14?
Standard Addition Graph: Tooth enamel consists mainly of themineral calcium hydroxyapatite. Trace element in teeth ofarchaeological specimens provide anthropologists with cules aboutdiet and disease
(a) In the acetylene molecule (C2H2), which of the following are present? A) 2 VSEPR electron pairs around each carbon atom B) 3 ? and 1 ? bonds C) 2 ? bonds
Suppose you were instructed to add 38 g of sodium chloride (NaCl) to 100 mL of water. a. prepared as instructed at 20°C b. heated the mixture in (a) to 100°C. Describe what you would observe
Describe the following combinations as either soluble or insoluble. 1. Sand sinks to the bottom of a beaker of water. 2.Antifreeze and water mix completely. 3. Benzene, a liquid, floats on the surfa
(a) The fact that the BCl3 molecule is planar means that the B atom is which of the following? unhybridized sp3 hybridized sp2 hybridized sp hybridized Hint
Reactant: water and 2.51 g of SbCl3 Product: 1.906 g of a solid of antimony, oxygen and chlorine, and 0.802 g of a single gas that is 97.20% chlorine and 2.75% hydrogen What is the empirical formula
In a hydrogen atom, from what energy level must an electron fall to the n = 3 level to give a line at 1.28 micrometers in the infrared region? a. 7 b. 5 c. 6 d. 4 e
What is the percent ionization of HA in 0.11 mol/L HA(aq) if HA is a weak acid with pKa=6.00. Enter your answer accurate to three significant figures
Determine the magnesium content (in ppm) of a 100.00 mL sample of drinking water if the following data were obtained. Titrant is 0.0551 M EDTA, 12.41 mL were used when an aliquot of the sample was a
Draw the product obtained when trans-3-octene is treated first with Br2 in CH2Cl2, second with NaNH2 in NH3, and then finally with H2/Lindlar's catalyst.
Calculate the base to acid ratio needed to make a pH 3.80 buffer from acetic acid (Ka = 1.8 x 10-5) and sodium acetate.
Determine the [H3O+], [OH-], pH, and pOH for each of the following solutions. A solution of 1.65 x 10-4 M HCl
Determine the [H3O+], [OH-], pH, and pOH for each of the following solutions. A solution with a pH of 6.25
11.6 mL of 3.0 M sulfuric acid are required to neutralize the OH- in 25.00 mL of NaOH solution. What is the molarity of the NaOH solution
20.00 mL of 0.160 M HC2H3O2 (Ka = 1.8x10-5) is titrated with 0.200 M NaOH. What is the pH at the equivalence point
20.00 mL of 0.160 M HC2H3O2 (Ka = 1.8x10-5) is titrated with 0.200 M NaOH. What is the pH of the solution before the titration begins
how many NB molecules could you make by screwing one nut onto each bolt? show a balanced chemical equation and show all calculations for full credit
If I have 100.00 mL of 0.350 M latic acid already, how many grams of sodium lactate (molar mass = 112.06 g/mol) will I neeed to add to this solution to make the preceding buffer? Assume the volume d
The compound MgSo4 is called Epsom Salts. How many grams will you need to prepare a bath containing 5.60 moles of Epsom salts
Write the correct equation for the principal B/L acid/base equilibrium reaction in 0.1 M (H4N)2So4.
Calculate the number of grams in each of the following: 0.520 mole NaCl 1.80 moles Na2C 0.250 mole H2O 4.10 moles CO2
Calculate the molar mass for each of the following. Express your answer to four significant figures and include the appropriate units. Cl2 C3H6O3 Mg3(PO4)2 AlF3 C2H4Cl2 SnCl2
What is the maximum number of electrons that can be in a second electron shell (principal energy level)?