Abeka Chemistry Test 2 fully solved exam study guide (100% accurate expert solutions)download to pass

A set of symbols that tells how many of each type of atom are found in a molecule is called a _______ _______. molecular formula A molecule of the sugar fructose contains 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms. Its empirical formula would be _____. CH2O Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:00 Full screen What is the formula for nitrogen dioxide? NO2 What is the formula of copper(I) hydroxide? CuOH What is the formula for calcium carbonate? CaCO3 Avogadro's number is equal to ____/ 6.022 X 10^23 Which of the following mole ratios cannot be derived from the equation 2C7H8(g)+ 9O2(g)———- 7CO2(g)+ 4H2O(g)? 4 mol C7H8: 2 mol H2O What is the sum of the atomic masses of all the atoms in a molecule? Molecular mass What is NH4+ ammonium ion What is Fe2+ iron(II) ion What is NO3- nitrate ion What is SO4 2- sulfate ion What is the correct charge for the lead(II) ion? 2+ What is the correct charge for the hydrogen ion? 1+ What is the correct charge for the chloride ion? 1- What is the correct charge for the phosphate ion? 3- What does this mean? CO2 carbon dioxide What does this mean? SF6 sulfur hexafluoride What does this mean? NaOH sodium hydroxide What does this mean? Fe(NO3)2 iron(II) nitrate What does this mean? (NH4)2 SO4 ammonium sulfate What kind of chemical reaction is the following 2Ag2O(s)———- 4Ag(s)+ O2(g). Change symbol on the arrow decomposition reaction What kind of chemical reaction is the following H2O(g)——- 2H2(g)+ O2(g) decomposition reaction What kind of chemical reaction is the following Ag(s)+ NaCl(aq)———- AgCl(s)+ Na(s) single displacement reaction What kind of chemical reaction is the following NH3(g)+ HCl(g)———- NH4Cl(s) combination reaction What kind of chemical reaction is the following BaCl2(aq)+ K2CrO4(aq)——— 2BaCrO4(aq)+ 2KCl(s) double displacement reaction What unit is equivalent to Avogadro's number of objects? mole Find the molecular mass of NO2 if the atomic mass of N is 14.01 u and the atomic mass of O is 16 u. 46.01 Find the molar mass of AgNO3 given the following atomic masses: Ag = 107.9 u, N=14.01 u, O= 16.00 u express the answer in proper significant figures and units 169.9 g/mol Consider the reaction 2 Al2(s) + Fe2O3(s)———- 2Fe(l) + Al2O3(s). If 60.0 g of Al is reacted with excess Fe2O3, determine the amount ( in moles) and mass ( in grams) of Al2O3 produced. (M Al2O3=101.96 g/mol) 1.11 moles, 113g A 75.00g sample of a substance is analyzed and found to consist of 32.73g phosphorus and 42.27g oxygen. Calculate the percent composition of this substance. 43.64% P 56.36% O The mineral cuprite consists of 88.8% Cu and 11.2% O by mass; determine the empirical formula of cuprite. Cu2O Balance the following equations in the space provided: Ca(s) + H2O(l) ———- Ca(OH)2(aq) + H2(g) Ca + 2H2O---Ca(OH)2 + H2 Balance the following equations in the space provided KClO3(s)———- KCl(s)+ O2(g) 2KClO3---2KCl + 3O2 Balance the following equations in the space provided: Sb2S3(s)+ O2(g)———- Sb2O3(s)+ SO2(g) 2Sb2S3 + 9O2 ---2Sb2O3 + 6SO2 N2H4(hydrazine) is sometimes used as a rocket fuel because it reacts readily with oxygen-containing compounds to produce large amounts of hot gas; one such reaction is 2 N2H4(l)+ N2O4(l)———- 3N2(g) + 4H2O(g). If 3 mol N2H4 and 4 mol N2O4 are available at the beginning of this reaction, which substance will be the limiting reactant? N2H4(hydrazine)