University:
California State University, Northridge
Course:
CHEM 101 | General Chemistry I
Academic year:

2024
Views:

320

Pages:

8
Author:

Samuel K

Chapter 4: Chemical Reactions A+Due Feb 27 at 11:59pmPoints 15Questions 15Available Feb 21 at 12am - Feb 27 at 11:59pmTime Limit NoneThis quiz is no longer available as the course has been concluded.Question 11 ptsWhat happens when substances react?They gain massThey lose massMass remains constantMass turns into energyQuestion 21 ptsWhat is a chemical reaction?A change in colorA change in stateA change in compositionA change in temperature Question 31 ptsWhat is the law of conservation of mass?Mass is created during a reactionMass is destroyed during a reactionMass can change form during a reactionMass is neither created nor destroyed during a reactionQuestion 41 ptsWhy is it important to balance chemical equations?To make the equation look niceTo satisfy the law of conservation of massTo make the reactants and products equalTo impress your chemistry teacher Question 51 ptsWhat is a reactant in a chemical equation?The substance formedThe substance on the right sideThe substance on the left sideThe substance in the middleQuestion 61 ptsIn a chemical equation, what are the coefficients used for?To indicate the state of matterTo balance the equationTo show the color changeTo represent temperature Question 71 ptsWhat is the product in a chemical equation?The substance formedThe substance on the right sideThe substance on the left sideThe substance in the middleQuestion 81 ptsHow do you balance the chemical equation: CH4 + O2 CO2 + H2O?CH4+2O2 - CO2 + 2H2OCH4+ O2 -> 2CO2 + H2OCH4 + 202 - CO2 + H2OCH4+O2CO2 + 2H2O Question 91 ptsWhat is the coefficient of O2 in the balanced equation: 2H2 + O22H2O?1O234Question 101 ptsWhat is the product of the reaction: 2Na + 2H2O 2NaOH + H2?Na2ONa2H2ONaOH + H2ONaOH + H2 Question 111 ptsHow many atoms of oxygen are on the reactant side of the balancedequation: 4Fe + 302 2Fe2O3?3469Question 121 ptsWhat is the balanced equation for the reaction: C4H10 + O2CO2+H2O?C4H10 + 402 4CO2 + 5H2OC4H10 + 602 4CO2 + 5H2OC4H10 + 502 4CO2 + 5H2OC4H10 + 702 4CO2 + 5H2O Question 131 ptsWhat is the coefficient of CO2 in the balanced equation: 2C4H10 +13O2 8CO2 + 10H2O?24810Question 141 ptsWhat is the product of the reaction: 3Mg + N2 Mg3N2?Mg2NMgN2Mg3N2MgN3 Question 151 ptsHow many atoms of hydrogen are there on the product side of thebalanced equation: N2 + 3H2 - 2NH3?2369