Master Chemistry with Fun Quizzes & Brain Teasers!

1. ) Use the rate law to explain quantitatively how decreasing the iodate ion concentration affects the rate of the iodine clock reaction? (State whether it doubles or triples, etc. )2. ) Use the rate law to explain quantitatively how increasing the bisulfite ion concentration affects the rate of the iodine clock reaction? (Again, state whether it doubles or triples, etc. )3. ) How would doubling the total volume of the solution by doubling the volume of water, iodate and bisulfite solutions affect the rate of the iodine clock reaction? Explain in full sentences. 4. ) Why is it important to record the temperature when you did not have to use it in any of your calculations? Explain in full sentences. 5. ) Explain, at the particulate level, why increasing the concentrations of the reactantswould cause an increase in the rate of the reaction. (Think carefully what is meant by"at the particulate level. ")
1 Answer
Ensure the Sales worksheet is active. Enter a function in cell B8 to create a custom transaction number. The transaction number should be comprised of the item number listed in cell C8 combined with the quantity in cell D8 and the first initial of the payment type in cell E1. Use Auto Fill to copy the function down, completing the data in column B. Enter a nested function in cell G8 that displays the word Flag if the Payment Type is Credit and the Amount is greater than or equal to $4000. Otherwise, the function will display a blank cell. Use Auto Fill to copy the function down, completing the data in column G. Create a data validation list in cell D5 that displays Quantity, Payment Type, and Amount. Type the Trans# 30038C in cell B5, and select Quantity from the validation list in cell D5. Enter a nested lookup function in cell F5 that evaluates the Trans # in cell B5 as well as the Category in cell D5, and returns the results based on the data in the range C8:F32
1 Answer
Three students are asked to discuss whether Gibbs Free Energy was positive ornegative for each dissolution. Select the student that employs correctscientific reasoning. . Student 1: The Gibbs Free Energy was negative for both reactions because the reactions werespontaneous, the reactions happened. Student 2: The Gibbs Free Energy was positive for the first reaction because it got colder andnegative for the second reaction because it got hotter. Student 3: The Gibbs Free Energy was positive for both reactions because it is always positive fordissolutions. Student 3Student 2Student 1In the next three problems, use the CER format to answer this guiding
1 Answer
In the following acid-base reaction hpo42- is the_____________
1 Answer
Design a portable, 1-time-use hot pack and a 1-time-use cold pack for treating injuries. The pack must have 100 g of water separated from a solid chemical and be activated only when the user does something to the pack to mix the 2 components. Your job is to determine how many grams of the chemical are required to achieve the following temperatures: hot pack, 55 C (131 F); cold pack, 3 C (37 F). Provide a proposal that includes a visual model of your design, calculations to support your proposal, and a CER that will provide an explanation behind your design
1 Answer
If 44. 0 grams of sodium reacts with 10. 0 grams of chlorine gas, how many grams of sodium chloride could potentially be formed? 2 na(s) + cl2(g) 2 nacl(s)
1 Answer
A 100 n force pulls a box horizontally across a floor for 2 m. how much was done by the force of gravity (which pulls straight down on the box)?a. 50 jb. 0 jc. 100 jd. 200 j
1 Answer
Calculate the standard free-energy changes for the following reactions at 25c: (a) h2(g) + br2(l) 2hbr(g)
1 Answer
Select the statement that reflects a central theme of the atomists. a. atomists would agree that a butterfly and a caterpillar are one in the same since a caterpillar becomes a butterfly. b. atomists would agree that epistemology provides a defensible explanation of why a butterfly differs from a caterpillar. c. atomists would agree that during metamorphosis, a caterpillar ceases to exist and a butterfly is spontaneously created in its place. d. atomists would agree that a butterfly and a caterpillar exist as a collection of atoms, but their atoms are organized differently
1 Answer
Assume a gallon of gasoline contains 2370. 0 grams of octane. How many grams of carbon dioxide would beproduced by the complete combustion of the octane in this gallon of gasoline?In 2017, people in the US used about 143 billion gallons of gasoline. How many grams of carbon dioxidewere generated by the combustion of this gasoline, assuming the value you calculated in the first questionwas accurate?
1 Answer
Explain, in terms of the ions present, why potassium bromide must be molten during this electrolysis.
1 Answer
Balance the Following Equations:Instruction: While balancing equation write the physical state of reactants and products as well as any reaction conditions. 1) CuSO4 + KI Cu2I2 + K2SO4 + I22) NH3 + O2 NO + H2O3)Fe2O3 + CO Fe + CO24) Cu + AgNO3 Cu(NO3)2 + Ag5) Pb(NO3)2 + H2SO4 PbSO4 + HNO36) CaCO3 + HCl CaCl2 + H2O(l) + CO27)MnO2 + HCl MnCl2 + H2O + Cl2I will report any comments that are not appropriate for the question asked or simply typed something for the points. Only answer if u know
1 Answer
Complex Ion Formation:Cu(NH3)42 Ecell, after adding 6 M NH3to the copper cell 0. 77V. Use the Nernst equation to calculate the concentration of that free copper (II) ion that is in equilibrium with the complexed copper (II) ion, Cu(NH3)42 in the solution. Does the calculated value for the [Cu2 ] make sense (look up the Kf for the formation of Cu(NH3)42 ) and rationalize your findings)
1 Answer
If 15.0 ml of a 0.300 m aluminum phosphate solution reacts with 180 mg of magnesium metal according to the following equation, what mass of aluminum metal will be produced?
1 Answer
9. An unknown gas has a volume of 200L at 5 atm and -140C. What is its volume at STP?10. A Los Angeles class nuclear sub has an internal volume of eleven million liter at apressure of 1. 250 atm. If a crewman were to open one of the hatches to the outsideocean while it was underwater (pressure of 15. 75 atm), what would be the new volumeof the air inside?11. A man heats a balloon in the oven (Why?. Who knows?. It is a crazy world we live in). If the balloon initially has a volume of 0. 40 L and a temperature of 20 C, what is itsvolume after he heats it to 250 C?Mixed Gas Laws12. A gas has a pressure of 1. 26 atm and occupies a volume of 7. 40 L. If the gas iscompressed to a volume of 2. 93 L, what is its new pressure?13. People who are angry sometimes say that they feel as if they'll explode. If a calmperson with a lung capacity of 3. 5 liters and a body temperature of 36 C gets angry,what is the volume of their lungs if their temperature rises to 39 C. Do you think theywill really explode?
1 Answer
QUICKLY PLEASE: What is true about 1. 0 mol Ca and 1. 0 mol Mg? (3 points)
1 Answer
You're given an unknown acid and told that it will donate one proton per molecule. When 1. 0 g of this acid is dissolved in water, the resulting solution requires 50. 0 ml of a 0. 25 M solution of NaOH for neutralization. What's the molecular mass of the unknown acid? Explain. (Hint: Find the moles of acid present)
1 Answer
1. a balloonis filled with hydrogen at a temperature of 22.0c and a pressure of$12 mm hg. if the balloon's original volume was 1.25 liters, what will its newvolume be at a higher altitude, where the pressure is only 625 mm hg? assumethe temperature stays the same.
1 Answer
What is the molarity of a solution made by dissolving 2. 0 mol of solute in 6. 0 L of solvent?
1 Answer
How many grams of protein are needed to produce 23,000 cal of energy? Every gram of protein can produce 17 KJ of energy
1 Answer
How many molecules are in 9. 44 moles of AlCl3? *Pleaseeeee helpppp
1 Answer
A chunk of zinc reacts with hydrochloric acid. If the chunk of zinc was turned into powdered zinc, what would happen to the reaction
1 Answer
Benzoic acid, ch3cooh, is a weak acid with ka = 6.3 10-5.ch3co,h(aq) + h2o(1) = h2o+(aq) + ch3co2 (aq)1. calculate the ph of a 0.150 m benzoic acid solution. show all calculations.
1 Answer
This animal has a backbone; nurses its offspring; likes to gnaw; has a bushy tail; stores food for winter; and has stripes on its back.
1 Answer