Chemistry Cumulative Exam Prep Q2 100% Accurate!

If a substance reacts with oxygen, the chemical reaction is most likely a... - ANSWERcombustion reaction An unbalanced chemical equation for the reaction of boron fluoride with lithium sulfite is shown below. BF3 + Li2SO3 Right arrow. B2(SO3)3 + LiF What is the coefficient of lithium fluoride in the balanced chemical reaction? - ANSWER6 What is the percent by mass of water in Na2SO4 • 10H2O? - ANSWER55.92% Which equation is a decomposition reaction? - ANSWERLi2CO3 Right arrow. Li2O + CO2 Consider the balanced equation below. PCl3+Cl2PCl5 What is the mole ratio of PCl3 to PCl5? - ANSWER1:1 The molar mass of water (H2O) is 18.0 g/mol. A sample of water has a mass of 18.0 g. How many moles of water are contained in this sample? - ANSWER1.00 Chemists use activity series to determine whether which type of reaction will occur? - ANSWERsingle replacement During an experiment, Jon exhales through a straw and blows bubbles into a solution. Which observation would most likely indicate that a chemical reaction is occurring? - ANSWERThe solution becomes cloudy with a white solid. Consider the equation below. Zn + H2SO4 ZnSO4 + H2 The mole ratio of zinc to zinc sulfate is - ANSWER1:1 The chemical equation below shows the decomposition of ammonium nitrate (NH4NO3).