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Chapter 6 Chemistry
| Question | Answer |
|---|---|
| What is the molar mass of sucrose(C12H22O11) | 342g |
| given the following equation, what is the form of the conversion factor needed to convert the # of moles of O2 to the # of moles of Fe2O3 produced 4Fe + 3O2 = 2Fe2O3 | 2 moles of Fe2O3 / 3 moles of O2 |
| How many grams of glucose(C6H12O6) are in 3.55 moles of glucose | 639g |
| One mole of neon atoms has a mass of | 20.2g |
| In any balanced chemical equation, the number of each type of atom on both sides of the equation is | the same |
| What is the molar mass of sodium phosphate Na3PO4 | 164 g |
| for the reaction: 2H2O + 137kcal = 2H2 +O2 How many kcal are needed to form 2.00 moles of O2 | 274 kcal |
| What is the classification of this reaction: SO3 + H2O = H2SO4 | Combination |
| The molar mass of C3H8O2 is | 76.0g |
| How many hydrogen atoms are present in 75.0g of H2O | 5.02 X 10-24 |
| 2Mg + O2 =2MgOThe # of moles of Oxygen gas needed to react with 4.0 moles of MG is | 2.0 moles |
| How many moles of water, H2O, are present in 75.0g of H2O | 4.17 moles |
| What is oxidized and what is reduced in the following reaction: 2Al + 3Br2 = 2AlBr3 | Al is oxidized and Br2 is reduced |
| In the reaction of nitrogen gas, N2, with hydrogen gas, H2, to form ammonia gas, NH3, how many moles of hydrogen are needed to react with 2 moles of nitrogen | 6 moles |
| Which of the following gives the balanced equation for this reaction:K3PO4 + Ca(NO3)2 = Ca3(PO4)2 + KNO3 | 2K3PO4 + 3Ca(NO3)2 = Ca3(PO4)2 + 6KNO3 |
| what is the coefficient for oxyhen in the balanced equation:C5H12 + O2 = CO2 + H2O | 8 |
| How many kcal are produced when 32 g of CH4 reactCH4 + 2O2 = CO2 + 2H2O + 218kcal | 436 kcal |
| In a ________ reaction, 2 or more elements or compounds form 1 product | combination |
| find the mass of AlCl3 that is produced when 25.0g of Al2O3 react with HCl according to the following equation:Al2O3 + 6HCl = 2AlCl3 + 3H2O | 65.4g |
| 2Mg + O2 = 2MgOHow many grams of MgO are produced when 40.0 grams of O2 react completely with Mg | 101 grams |
| The _____ is the minimum energy needed for a chemical reation to begin | activation energy |
| Which of the following described an oxidation | loss of electrons or gain of oxygen |
| What is the molar mass of Mg3(PO4)2,a substance formerly used in medicine as an antacid | 262.9 g |
| In this reaction what is the correct coefficient for sodium chloridePb(NO3)2 + NaCl = PbCl2 + NaNO3 | 2 |
| In this reaction what is the substance oxidized:Zn + 2HCl = ZnCl2 + H2 | Zn |
| How many moles of iron are present in 3.15 X 10-24 atoms of iron | 5.23 moles |
| One mole of particles of any substanace contains how many particles | 6.02 X 10-23 |
| What is the coefficient of hydrogen, H2, when the following equation is balanced:Al + H2SO4 = Al2(SO4)3 + H2 | 3 |
| in an endothermic reaction | energy is absorbed by the system |
| if the reaction shown below is exothermic, the energy level of the reactants isH2 + O2 = 2H2O | higher than that of the products |
| Which of the following is an oxidation-reduction reaction | N2 + O2 = 2NO |
| 0.100 mole of lithium weights | 0.694 g |
| When 10.0 g of NH3 reacts, the actual yield of N2 is 8.50 g. What is the percent yield4NH3 + 6NO = 5N2 + 6H2O | 41.3% |
| Calculate the molar mass of magnesium chloride, MgCl2 | 95.2 g |
| In this reaction, what is the coefficient for calcium oxide:CaO + CO2 = CaCO3 | 1 |
| Any reaction that absorbs 150 kcal of energy can be classified as | endothermic |
| 2Mg + O2 = 2MgOHow many moles of magnesium are needed to react with 16 g of O2 | 1.0 moles |
| In the reaction of silver nitrate with sodium chloride, how many grams of silver chloride will be produced from 100. g of silver nitrate when mixed with an excess of SC. AgNO3 + NaCl = AgCl + NaNO3 | 84.4 g |
| Find the mass of AlCl3 that is produced when 10.0 g of Al2O3 react with 10.0 g of Hcl according to the following equation:Al2O3 + 6HCl = 2AlCl3 + 3H2O | 12.2 g |
| How many grams of H2O are needed to produce 150 g of Mg(OH)2Mg3N2 + 6H2O = 3Mg(OH)2 + 2NH3 | 93 g |
| The molar mass of potassium is | 39.1 g |
| 2Mg + O2 = 2MgOthe # of moles of MgO produced when 0.20 mole of O2 reacts completely is | 0.40 mole |
| 3.00 moles of NO2 have a mass of | 138 g |
| C5H12 + O2 = CO2 + H2OWhat is the coefficient for carbon dioxide in the balanced equation | 5 |
| How many grams of hydrogen are needed to produce 1.80 g of water according to this equation:2H2 + O2 = 2H2O | 0.200 g |
| the reaction of carbon with oxygen to produce carbon monoxide is an example of which class of reaction:2C + O2 = 2CO | combination |
| A reation that releases energy as it occurs is classified as a | exothermic reaction |
| Mg3N2 + 6H2O = 3Mg(OH)2 + 2NH3When 2.00 moles of H2O react, how many grams of NH3 are produced | 11.3 grams |
| A chemical equation is balanced when | the # of atoms of each element is the same in reactants and products |
| How many moles of Carbon atoms are there in 0.500 mole of C2H6 | 1.00 moles |
| The _____ is the energy difference between reactants and products in a chemical reaction | heat of reaction |
| What coefficient is placed in front of O2 to complete the balancing of the following equation:C5H8 + ?O2 = 5CO2 + 4H2O | 7 |
| In an oxidation-reduction reaction, the substance oxidized always | shows a loss of electrons |
| How many molecules of water, H2O, are present in 75.0 grams of H2O | 2.51 X 10-24 |
| One molecule of helium gas weighs | 4.00 g. |
Created by:
jennydavid