EOC Review

EOC ReviewTrivia Race #31. Which model represents the law of conservation of matter?

2. Which of the following is insoluble in water? In other words, which one can be a precipitate?Ammonium chlorideCalcium chromateBarium bromideCopper II carbonate#3

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1. Which acid is the stronger acid?A. HCl B. HF2. Which acid will have a higher pH?A. HCl B. HF

NOTE: Must answer as a combination answer. Example: AA, AB, BB, or BA.

#11#12 What is the pH of a solution that has a hydronium ion concentration of [2.5 x 10-3]?A. 11.4B. 3.0C. 2.6D. 9.0Not the same question:#13What is the pOH of a solution that has a hydronium ion concentration of [2.5 x 10-3]?A. 11.4B. 3.0C. 2.6D. 9.0

#14What is the hydroxide ion concentration of a solution that has a pOH of 8.8?

A. 6.31 x 10-6B. 1.58 x 10-9C. 5.04 x 10-5D. 1.32 x 10-8#15Consider four sealed, rigid containers with the following volumes: 50 mL, 100 mL, 250 mL and 500 mL. If each of these contains .25 moles of heliumgas at standard temperature, which container would have the greatest pressure?A 50 mLB 100 mLC 250 mLD 500 mL#16Which substance would be least likely to dissolve in a polar solvent?

A nonpolar moleculeB acidsC polar moleculeD ionic compound#17When referring to the solubility of different substances, the phrase "like dissolves like" is often used as a guideline to select an appropriate solvent. The property referenced in "like dissolves like" is the A mass of the moleculeB size of the moleculeC polarity of the moleculeD temperature of the molecule#18If the temperature of a gas changes, but the number of moles and volume remain constant, which of the following values must also change?

A densityB pressureC number of atomsD mass#19How many electrons are in a Cd3+ ion?

A 112B 51C 48D 45#20From which of the following atoms would it be the MOST difficult to remove an electron?

A sodiumB aluminumC sulfurD chlorine#21A sample of Element X is found to contain 72.15% of isotope type 1 (84.9118 amu) and 27.85% ofisotope type 2 (86.9092 amu). Calculate the average atomic mass.A 85.13 amuB 85.47 amuC 86.21 amuD 86.49 amu#22The protons in Rutherfords experiments were used to

A identify chemical propertiesB identify the melting pointC determine molecular massD bombard sheets of gold#23Which of the following atoms would have the largest ionic radius?

A lithiumB sodiumC potassiumD cesium#24A solution in which more solute is dissolved than is typically soluble at a given temperature is

A unsaturatedB saturatedC supersaturatedD diluted#25What volume of 2.5M NaOH solutioncontains 3.25 mol of NaOH?A 0.098 LB 0.575 LC 1.30 LD 1.45 L#26Element X reacts with chlorine to form an ionic compound that has the formula XCl2. To which group on the Periodic Table could element X belong?

(A) Group 1 (B) Group 13(C) Group 2 (D) Group 15

#27Which general trend is found in Period 3 as the elements are considered in order of increasing atomic number?

(A) increasing atomic radius(B) increasing electronegativity (C) decreasing atomic mass(D) decreasing first ionization energy

#28Which of the following stated electrons were scattered throughout a positive mass?(A) Rutherford Model(B) Planck Model(C) Bohr Model (D) Plum Pudding Model #29Which conclusion is based on the gold foil experiment and the resulting model of the atom?(A) An atom is mainly empty space, and the nucleus has a positive charge.(B) An atom is mainly empty space, and the nucleus has a negative charge.(C) An atom has hardly any empty space, and the nucleus has a positive charge.(D) An atom has hardly any empty space, and the nucleus has a negative charge.

#30Which of the following is a false statement:

(A) Ernest Rutherford identified the nucleus of the atom.(B) Democritus thought that changes in matter resulted from atoms simply rearranging.(C) John Dalton believed that all atoms of the same element were all identical.(D) According to J.J. Thomson, atoms of elements are indivisible

#31

A bromine atom in the ground state will have an electron configuration of

(A) [Ar] 4s1 3d104p5 (B) [Ar] 4s2 3d9 4p5 (C) [Ar] 4s2 3d104p5(D) [Ar] 4s2 3d9 4p6