Unit 5 Study Guide
... molar mass is 26.02 g/mol. Calculate the empirical formula and molecular formula of acetylene. ...
... molar mass is 26.02 g/mol. Calculate the empirical formula and molecular formula of acetylene. ...
1 1. Give two reasons why a luminous flame is not used for heating
... The chief ore of alumunium is bauxite which mainly contains Al2O3.2H2O. The ore is initially purified before aluminium is extracted electrolytically. a) Identify the main impurities associated with this ore. 1mk*UG* b) Sodium hydroxide solution is used in the purification process. State its role. 1m ...
... The chief ore of alumunium is bauxite which mainly contains Al2O3.2H2O. The ore is initially purified before aluminium is extracted electrolytically. a) Identify the main impurities associated with this ore. 1mk*UG* b) Sodium hydroxide solution is used in the purification process. State its role. 1m ...
review sheet
... 14. If 20.00 mL of a 0.01 M solution of HCl is titrated with NaOH, 15.00 mL of NaOH is used at the endpoint. What is the molarity of the base? 15. What is the Ka of an acid that has a [H+] of 2.5 x 10-3M and the concentration of athe acid is .2M? 16. If the concentration of [Ag+1] is 2.53 x 10-4 M, ...
... 14. If 20.00 mL of a 0.01 M solution of HCl is titrated with NaOH, 15.00 mL of NaOH is used at the endpoint. What is the molarity of the base? 15. What is the Ka of an acid that has a [H+] of 2.5 x 10-3M and the concentration of athe acid is .2M? 16. If the concentration of [Ag+1] is 2.53 x 10-4 M, ...
Chapter 2 PowerPoint
... 5. Water organizes nonpolar molecules – Hydrophilic “water-loving” – Hydrophobic “water-fearing” – Water causes hydrophobic molecules to aggregate or assume specific shapes ...
... 5. Water organizes nonpolar molecules – Hydrophilic “water-loving” – Hydrophobic “water-fearing” – Water causes hydrophobic molecules to aggregate or assume specific shapes ...
Too Hot to Handle Lab
... Purpose: To understand what occurs in Chemical reactions where heat is gained (endothermic), and where heat is lost (exothermic). Background: A Chemical reaction in which energy is released is an exothermic reaction. The word exothermic comes from the root – “thermic”, which refers to heat, and the ...
... Purpose: To understand what occurs in Chemical reactions where heat is gained (endothermic), and where heat is lost (exothermic). Background: A Chemical reaction in which energy is released is an exothermic reaction. The word exothermic comes from the root – “thermic”, which refers to heat, and the ...
2nd Semester Final Exam Review
... 5. What is the effect on the number of dissolved particles on: vapor pressure, freezing point, and boiling point? Colligative properties 6. Which of the following will have the higher boiling point, .100M NaNO 3 or .100 M MgBr2? 7. Write the dissociation equations for the following compounds in wate ...
... 5. What is the effect on the number of dissolved particles on: vapor pressure, freezing point, and boiling point? Colligative properties 6. Which of the following will have the higher boiling point, .100M NaNO 3 or .100 M MgBr2? 7. Write the dissociation equations for the following compounds in wate ...
Answers
... 5) A sample of ammonia (NH3) contains 7.22 moles of ammonia. How many molecules of ammonia are in the sample? 6) What is the mass of 2.0 mol of CuCl2? 7) A susbstance is analyzed and determined to be made up of 69.4 % carbon, 4.13 % hydrogen, and 26.4 % oxygen. The molar mass of the substance is fou ...
... 5) A sample of ammonia (NH3) contains 7.22 moles of ammonia. How many molecules of ammonia are in the sample? 6) What is the mass of 2.0 mol of CuCl2? 7) A susbstance is analyzed and determined to be made up of 69.4 % carbon, 4.13 % hydrogen, and 26.4 % oxygen. The molar mass of the substance is fou ...
Chemistry II Demonstration Assessment
... Background Information: Chemical reactions occur when atoms are separated, rearranged, and/or joined in a new way. In this experiment you will decompose the chemical compound you synthesized in the laboratory yesterday. Energy is always required to break the bonds of a compound. You will use a 9 vol ...
... Background Information: Chemical reactions occur when atoms are separated, rearranged, and/or joined in a new way. In this experiment you will decompose the chemical compound you synthesized in the laboratory yesterday. Energy is always required to break the bonds of a compound. You will use a 9 vol ...
Practice Exam 3 - University of Missouri
... 14. The relative rates of effusion of H2 to He in an equal molar mixture of both is: a. ...
... 14. The relative rates of effusion of H2 to He in an equal molar mixture of both is: a. ...
Dr. Ali Ebneshahidi
... Presence of catalysts: inorganic catalysts or organic catalysts (enzymes) increase reaction rate. ...
... Presence of catalysts: inorganic catalysts or organic catalysts (enzymes) increase reaction rate. ...
chemical*equations
... When'a'chemical'reaction'occurs,' atoms'rearrange'to'form'new' compounds,'but'no'new'atoms'are' created'nor'are'any'destroyed.'This' concept'is'called'conservation'of' mass.'Mass'conservation'can'be' seen'in'a'balanced'chemical' equation,'where'the'numbers'of' each'kind'of'atom'are'the'same'on' both ...
... When'a'chemical'reaction'occurs,' atoms'rearrange'to'form'new' compounds,'but'no'new'atoms'are' created'nor'are'any'destroyed.'This' concept'is'called'conservation'of' mass.'Mass'conservation'can'be' seen'in'a'balanced'chemical' equation,'where'the'numbers'of' each'kind'of'atom'are'the'same'on' both ...
FINAL EXAM REVIEW
... 6. What is the empirical formula for the following compounds? a. 26.6% K, 35.4% Cr, 38.0% O b. 46.2% C, 7.69% H, 46.2% O c. 72.4% Fe, 27.6% O 7. What is the volume of 37.84mol of CO2(g) at STP? 8. Compute the mass needed to make 500.0 mL of solution at the indicated molarity. a. 0.85 M H2SO4 b. 4.1 ...
... 6. What is the empirical formula for the following compounds? a. 26.6% K, 35.4% Cr, 38.0% O b. 46.2% C, 7.69% H, 46.2% O c. 72.4% Fe, 27.6% O 7. What is the volume of 37.84mol of CO2(g) at STP? 8. Compute the mass needed to make 500.0 mL of solution at the indicated molarity. a. 0.85 M H2SO4 b. 4.1 ...
5,6 Quiz - mvhs
... 4. Write/Draw the following for Ag atom and Ag+ ion. a. Condensed electron configuration b. Condensed Orbital Notation c. Number of valence electrons 5. A student is asked to determine the molar enthalpy of neutralization, ∆Hneut, for the neutralization of HCl(aq) with NaOH(aq). The student combines ...
... 4. Write/Draw the following for Ag atom and Ag+ ion. a. Condensed electron configuration b. Condensed Orbital Notation c. Number of valence electrons 5. A student is asked to determine the molar enthalpy of neutralization, ∆Hneut, for the neutralization of HCl(aq) with NaOH(aq). The student combines ...
Chemical Equations and Reactions
... – Some form of energy is given off by the reaction • Heat given off causes reaction mixture to feel hot • Examples-burning wood, dynamite explosion ...
... – Some form of energy is given off by the reaction • Heat given off causes reaction mixture to feel hot • Examples-burning wood, dynamite explosion ...
Galvanic Cell Lab
... positive electrode. The positive electrode is called the cathode. Reduction reactions take place at the cathode. Ions in the electrolyte surrounding the cathode gain the electrons and form solids. The two electrolytes surrounding the cathode and the anode are connected with a salt bridge to allow ne ...
... positive electrode. The positive electrode is called the cathode. Reduction reactions take place at the cathode. Ions in the electrolyte surrounding the cathode gain the electrons and form solids. The two electrolytes surrounding the cathode and the anode are connected with a salt bridge to allow ne ...
Chemistry Scavenger Hunt
... 2. There are three main phases of matter: _____________, ____________, and _____________. There is also a fourth phase, ______________, but it exists at very high temperatures. Science Is Fun 2 Go to the “ChemTime Clock” area to find the answers to these questions. http://scifun.chem.wisc.edu/ChemTi ...
... 2. There are three main phases of matter: _____________, ____________, and _____________. There is also a fourth phase, ______________, but it exists at very high temperatures. Science Is Fun 2 Go to the “ChemTime Clock” area to find the answers to these questions. http://scifun.chem.wisc.edu/ChemTi ...
Chemistry Notes with Blanks
... The combination of carbon and water contains the same _________ as sugar. Elements: can’t be broken into _________ substances (atoms.) (Carbon is an element) Sugar + water…would you drink this? Ash + water…would you drink this? Why? They contain the same elements don’t they? Why don’t you get sugar ...
... The combination of carbon and water contains the same _________ as sugar. Elements: can’t be broken into _________ substances (atoms.) (Carbon is an element) Sugar + water…would you drink this? Ash + water…would you drink this? Why? They contain the same elements don’t they? Why don’t you get sugar ...
10 TEST 2 (of 3)
... Complete the following using the words ENDOTHERMIC, ENTHALPY, EXOTHERMIC (a) The heat evolved in a chemical reaction at constant pressure is called the change in __________________ for the reaction (ΔH). In an ______________ reaction ΔH is positive, in an _______________ reaction ΔH Is negative. ...
... Complete the following using the words ENDOTHERMIC, ENTHALPY, EXOTHERMIC (a) The heat evolved in a chemical reaction at constant pressure is called the change in __________________ for the reaction (ΔH). In an ______________ reaction ΔH is positive, in an _______________ reaction ΔH Is negative. ...
(p. 522)
... d. The dimeric structure of gaseous aluminum chloride Ans. a. Crystals of buckminsterfullerene (C60) b. White phosphorous (P4) and Red phosphorous c. : similarities between a Period 2 element and one diagonally down and to the right in Period 3. It reflects elements＇ similarities in atomic and ionic ...
... d. The dimeric structure of gaseous aluminum chloride Ans. a. Crystals of buckminsterfullerene (C60) b. White phosphorous (P4) and Red phosphorous c. : similarities between a Period 2 element and one diagonally down and to the right in Period 3. It reflects elements＇ similarities in atomic and ionic ...
Notes/ws on limiting reactants and percent yield.
... sodium reacts with 4.50 moles of oxygen gas? Identify the limiting reagent and determine how many grams of product is formed and how many grams of the excess reagent remains. ...
... sodium reacts with 4.50 moles of oxygen gas? Identify the limiting reagent and determine how many grams of product is formed and how many grams of the excess reagent remains. ...
Chemistry I Final Review
... 37. How many grams of chlorine gas are needed to react completely with 23.0 g of sodium in the following unbalanced reaction? Na + Cl2 → NaCl ...
... 37. How many grams of chlorine gas are needed to react completely with 23.0 g of sodium in the following unbalanced reaction? Na + Cl2 → NaCl ...
cell molecules
... • The chemical processes in the cell can be disrupted by changes to the H+ and OHconcentrations away from their normal values near pH 7. • To maintain cellular pH values at a constant level, biological fluids have buffers. • Buffers resist changes to the pH of a solution when H+ or OH- is added to t ...
... • The chemical processes in the cell can be disrupted by changes to the H+ and OHconcentrations away from their normal values near pH 7. • To maintain cellular pH values at a constant level, biological fluids have buffers. • Buffers resist changes to the pH of a solution when H+ or OH- is added to t ...
Electrolysis of water
Electrolysis of water is the decomposition of water (H2O) into oxygen (O2) and hydrogen gas (H2) due to an electric current being passed through the water.This technique can be used to make hydrogen fuel (hydrogen gas) and breathable oxygen; though currently most industrial methods make hydrogen fuel from natural gas instead.