Periodic Table
Elements in the periodic table are placed in increasing _____ in intervals of one.
Atomic Number
What is the formula for titration?
MAVA = MBVB
What is the formula for hydronium? (Not H+)
H3O+
_____ is a quantitative analytical technique used to determine the unknown concentration of an analyte of interest.
Titration
When atoms go from excited state to ground state, is energy released or absorbed?
Energy is released.
What element has the highest electronegativity? What element has the lowest electronegativity?
F and Fr, respectively.
What is the formula for density if you isolate the variable V?
What reaction produces a salt and water?
A neutralization reaction.
A student investigated the physical and chemical properties of a sample of an unknown gas and then identified the gas. Which statement repre- sents a conclusion rather than an experimental observation?
(1) The gas is colorless.
(2) The gas is carbon dioxide.
(3) When the gas is bubbled into limewater, the liquid becomes cloudy.
(4) When placed in the gas, a flaming splint stops burning.
(2) The gas is carbon dioxide.
Name a pH at which methyl orange may be orange.
Named a pH from 3.1-4.4.
As you go from left to right across a period in the periodic table, the atomic radius...
Decreases
John is doing an experiment and thinks he will produce 3.2 milliliters of slime. He produces 7,892.1 liters. What is his percent error?
246,627,900%
What acid formula is the same as HC2H3O2?
CH3COOH.
A student wishes to prepare approximately 100 milliliters of an aqueous solution of 6 M HCl using 12 M HCl. Which procedure is correct?
(1) adding 50 mL of 12 M HCI to 50 mL of water while stirring the mixture steadily
(2) adding 50 mL of 12 M HCl to 50 mL of water, and then stirring the mixture steadily
(3) adding 50 mL of water to 50 mL of 12 M HCl while stirring the mixture steadily
(4) adding 50 mL of water to 50 mL of 12 M HCl, and then stirring the mixture steadily
(1) adding 50 mL of 12 M HCI to 50 mL of water while stirring the mixture steadily
A condensation polymerization reaction produces a polymer and...
H2O
What element has the second highest first ionization energy?
What is the mass of 7 cm3 of beryllium?
12.95 grams.
What is the pH of a solution with a hydronium ion concentration of 0.01 mole per liter?
pH 2
112 Which measurement contains three significant figures?
(1) 0.08 cm
(2) 0.080 cm
(3) 800 cm
(4) 8.08 cm
(4) 8.08 cm
Who first proposed that all atoms of a given element are identical in mass and properties? Was he right?
2. No.
The elements from which two groups of the Periodic Table are most similar in their chemical properties?
(1) 1 and 2
(2) 1 and 17
(3) 2 and 17
(4) 17 and 18
(1) 1 and 2
A 5-gram substance is heated from 0oC to 132oC. It has a melting point of 5oC and a boiling point of 124oC. If it has a heat of fusion of 440 J/g and a heat of vaporization of 3330, and this process used 23470 J, then what is the specific heat capacity of the substance?
7.00 J/goC
Which compound is a salt?
(1) CH3OH
(2) C6H12O6
(3) H2C2O4
(4) KC2H3O2
(4) KC2H3O2
115 A student obtained the following data to determine the percent by mass of water in a hydrate.
Mass of empty crucible + cover - 11.70 g
Mass of crucible + cover +hydrated salt before heating - 14.90 g
Mass of crucible + cover + anhydrous salt after thorough heating - 14.53 g
What is the approximate percent by mass of the water in the hydrated salt?
(1) 2.5%
(2) 12%
(3) 88%
(4) 98%
(2) 12%
What table E ion has the most negative charge? Which has the most positive charge? What two ions are heavily related to acids and bases? What ion has the formula SCN-?
1. Phosphate
2. Mercury (I)
3. Hydronium/Hydrogen ion, Hydroxide
4. Thiocyanate