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Identify which of the following statements are incorrect. If the statement is incorrect, rewrite it to be correct.
a. Reactions are faster at higher temperature because activation energies are lower.
b. Rates increase with increasing concentration of reactants because there are more collisions between reactant molecules.
c. At higher temperatures, a larger fraction of molecules have enough energy to get over the activation energy barrier.
d. Catalyzed and uncatalyzed reactions have identical mechanisms.
a 10.000-g sample of toothpaste containing stannous flouride gives a 0.145-g precipitate of stannous phosphate. What is the percentage of SnF2 in the toothpaste sample?
A system absorbs 192 kj of heat and the surroundings do 120 kj of work on the system. what is the change in internal energy of the system
A gaseous sample of this element is bombarded by photons of various energies (in these same units). Match each photon to the result of its absorption (or lack thereof) by an n=1 electron.
How much water must be added to 562 mL of 0.200 M HCl to produce a 0.148 M solution? (Assume that the volumes are additive.)
Can you show me how to solve this Question? In the following reaction, which reactact is a Bronsted-Lowry Acid?
Experiments have shown that the average frequency of chirping by a snowy tree cricket depends on temperature as shown below.
consider the combustion of ethane2c2h6 7o2 yields 4co2 6h2oif the ethane is burning at the rate of 0.1 molls at what
Gasohol contains ethanol (C2H5OH) which when burned reacts with oxygen to produce CO2 (g) and H2O(g). How much heat is produced when 12.5 grams of ethanol burns.
If a message from flight control requires 170 sec to reach a satellite, how far in kilometers is the satellite from Earth?
The equation for a Beer's Law plot is y = 2012.5x + 0.003. If the recorded absorbance for an equilibrium mixture is 0.362, what is the concentration of FeCNS2+ (aq)?
What percentage of the Ca2 (aq) can be separated from the Ag (aq) by selective precipitation? hint: Ksp for Ag2SO4 is 1.20×10^-5 Ksp for CaSO4 is 4.93×10-5
Suggest a reason why the cyclic intermediate in the formation of methyl-e-4-methoxycinnamte from p-anisaldehyde, might have two important groups in a trans relationship
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