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Question 1: Give the numbers of protons and electrons in each of the following: (a) Na+, (b) Ca2+, (c) Al3+, (d) I, (e) O2, (f) N3, and (g) He.
Question 2: Write the molecular formula of glycine, an amino acid present in proteins.
Carbon = 2 atoms Hydrogen = 5 atoms Nitrogen = 1 atom Oxygen = 2 atoms.
Question 3: Which of the following compounds are likely to be ionic? Which are likely to be molecular? (a) SiCl4, (b) LiF, (c) BaCl2, (d) B2H6, (e) KCl, and (f) C2H4
An aqueous solution containing 5.0 g of solute in 100 ml is extracted w/three 25 ml portion of diethyl ether. What is the total amount of solute
If the pH of a solution is 4.2 (at 25 degrees C) what is the hydronium and hydroxide ion concentrations, and the pOH of the solution
A 74.0-mL sample of 0.13 M HNO2 (Ka = 4.0 × 10-4) is titrated with 0.14 M NaOH. What is the pH after 25.8 mL of NaOH has been added?
Many common weak bases are derivatives of NH3, where one or more of the hydrogen atoms have been replaced by another substituent.
Write a dissolution for each precipitate that is soluble in CH3COOH: Na2C2O4, Pb(NO3)2, Al2(SO4)3, NaCl, NaOH
A solution of .312 M KOH is used to neutralize 15.0 mL of a .186 M H3PO4 solution. what volume, in milliliters, of the KOH is required to reach the endpoint. H3PO4(aq)+3KOH(aq)>K3PO4(aq)+3H2O(l)
A certain sample of the mineral galena weighs 12.4 and has a volume of 1.64 mL. What is the density of galena?
Calculate the total mass of reactants and products in each of the following equations: a) 2Al(s)+3Cl2(g)--->2AlCl3(s); b) 4HCl(g)+O2(g)--->2Cl2(g)+2H2O(g).
How many copper atoms are in a cube of copper metal measuring 1.35 cm on each edge. The density of copper is 8.96 g/cm3.
What is the theoretical economy of heating A mixture of sodium carbonate and sodium bicarbonate. sodium carbonate is the desired product and water and carbon dioxide are the undesirable wastes .
A sample of gas has a volume of 35 liters and a temperature of 27 celsius. With the pressure remaining constant, the volume is raised to 50 liters. What is the new temperature
Determine the molality of a solution of water dissolved in methanol for which the mole fraction of water is 0.46.
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