MOLES REVIEW Team Trivia Style

GRAMS TO MOLES 1.How many moles are in 35.0 grams of carbon dioxide, CO 2 ?

ANSWERS: GRAMS TO MOLES 35.0 g CO 2 1 mol =.80 mol CO g CO 2 1.

MOLES TO GRAMS 3.How many grams are in 6.5 moles of aluminum phosphide, AlP?

ANSWERS: MOLES TO GRAMS 6.5 mol AlP58.0 g AlP = 377 g AlP 1 mol 3.

MOLES TO MOLECULES 5.How many molecules are in 1.9 moles of C?

ANSWERS: MOLES TO MOLECULES mol NO x molecules = 1.14 x molecules 1 mol

% COMPOSITION 8.What is the percent composition by mass of lithium oxide, Li 2 O?

ANSWERS: % COMPOSITION 8.

EMPIRICAL & MOLECULAR FORMULAS 10.What is the empirical formula of a compound that is 9.5% carbon, 15.0% fluorine, 63.0% bromine, and 12.6% oxygen by mass? 11.What is the molecular formula of the previous compound if its molar mass is g/mol?

ANSWERS: EMPIRICAL & MOLECULAR FORMULAS CFBrO = = g/mol 380.7/126.9 = 3C 3 F 3 Br 3 O 3

 How many moles of KCl are produced when 12 mol of O2 decompose completely? 2KClO3  2KCl + 3O2 MOLES TO MOLES

 For the reaction below, how many grams of O2 are contained in 93 grams of FeO? 2Fe + O2  2FeO GRAMS TO GRAMS

SOLUTIONS

A SOLUTION AT 20ºC CONTAINS 20 GRAMS OF KCL. HOW WOULD YOU DESCRIBE THE SOLUTION? A. Unsaturated B. Saturated C. Supersaturated D. nonionized

IF A SOLUTE IS ADDED TO A SATURATED SOLUTION OF THAT SAME MATERIAL AT THE SAME TEMPERATURE, THE SOLUTE WOULD… A. Dissolve completely B. Dissolve partially C. Sink to the bottom of the container.

IN A POLAR SOLVENT, DISSOCIATION OCCURS WHEN A SOLUTE IS… A. Covalent B. Ionic C. Nonpolar D. Liquid

MOLARITY  31. How many liters of a 10 M HCl solution is needed to prepare 3 L of 5 M HCl? (2 pts)  33. Calculate the molarity of a 2.0L solution that contains 100 g of solid NaOH. (3 pts)

ACIDS AND BASES

H 3 O+ IONS ARE KNOWN AS ____. A. hydronium ions B. hydrogen ions C. hydroxide ions D. hydroxyl groups

A BRØNSTED-LOWRY BASE… A. donates H+ B. accepts H+ C. donates OH- D. accepts OH-

A CONJUGATE BASE IS FORMED FROM… A. Water B. Salt C. Base D. Acid

THE EQUATION FOR THE REACTION THAT OCCURS WHEN SOLUTIONS OF HF AND NAOH, AN ACID AND A BASE, ARE MIXED IS… A. HF + NaOH  HOH + NaF B. HF + NaOH  H+ + NaF C. HF + NaOH  OH- + NaF D. HF + NaOH  H3O+ + NaF

A(N) ____ IS A SUBSTANCE THAT PRODUCES H3O+ IONS IN A SOLUTION. A. acid B. salt C. electrolyte D. base

WHAT IS THE PH OF A SOLUTION IF ITS POH= 5? A. A. pH = 9 B. B. pH = 5 C. C. pH = 14 D. D. pH = 7

KOH IS CONSIDERED A ________. H 2 SO 4 IS CONSIDERED A ________. A. Acid B. Base C. Salt

THERMO/KINETICS Heat Transfer

When ice freezes, the reaction is exothermic, which results in new bonds are being formed. TRUE OR FALSE:

 Name three ways that will increase the rate of a chemical reaction QUESTION

 What term represents the average kinetic energy of the particles in a substance? QUESTION

 How much energy in calories is released when 32.0g of water cools from 50 ° C to 20 ° C? (The specific heat of water is 4.18J/g ° C.)  Q = m x C x Δ T  m = 32.0g  C = 4.18 J/g ° C  Δ T = 50 – 20 = 30 ° C  Q = 32 x 4.18 x 30 = J /4.184J = ??? QUESTION