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Chemistry
Chemistry
High School
in general, when hydrocarbons like oil are added to water, the two liquids do not mix because hydrocarbons are non-polar and water is polar
Chemistry
High School
when is the residue removal log used? select the correct response. every time you rinse or air dry to remove residue from equipment before using it with organics whenever unloading a chlorine dishwasher at least once per shift
Chemistry
High School
A chemical reaction has a Q10 of 3. Which of the following rates characterizes this reaction?a. a rate of 6 at 20C and 2 at 30Cb. a rate of 6 at 30C and 2 at 20Cc. a rate of 9 at 20C and 3 at 30Cd. a rate of 9 at 40C and 3 at 20Ce. a rate of 12 at 10C and 4 at 20C
Chemistry
College
Which of the following represents work?a.)PVb.)Uc.)Hd.)P
Chemistry
High School
question 6 how do electrons in an atom change energy? electrons can only gain energy by leaving the atom (creating an ion). electrons move between discrete energy levels, or escape the atom if given enough energy. electrons can have any energy below the ionization energy within the atom, or escape if given enough energy. electrons can have any energy within the atom, and cannot be given enough energy to cause them to escape the atom. electrons move between discrete energy levels within the atom, and cannot accept an amount of energy that causes them to escape the atom.
Chemistry
High School
In a complete sentence, write down a method you could use to determine if an equation is written in the correct way and balanced
Chemistry
High School
mike needs to make 2 liters of a 0.3 m naoh solution for an experiment. he has a 1.2 m stock solution. how much stock solution must be diluted to reach his desired 2 liter, 0.3 m final solution?
Chemistry
College
Determine the density of carbon dioxide gas at 100.0C and 9.81 atm pressure?(R = 0.08206 L atm/K mol) C(12.01), O(16.00)
Chemistry
High School
which pair of substances cannot form a buffered aqueous solution? group of answer choices nh3 and (nh4)2so4 hno3 and nano3 hno2 and nano2 hf and naf hcn and kcn
Chemistry
College
Mary claims that two Duluth Solutions will have a lower reaction rate than two concentrated Solutions which statement tells whether Mary is right and gives a correct explanation a she is right because there will be fewer successful collisions between reactants and the dilute Solutions B be she is right because the Duluth solution gives the molecule more space to move more quickly see she is not right because of the dilute solution gives the molecules more room to move around and align themselves well for collisions or D she is not right because there will be fewer successful collisions between reactants in the dilute Solutions.
Chemistry
High School
how much heat is associated with the complete reaction of 11.80 kg k g of nitromethane? express your answer to four significant figures and include the appropriate units
Chemistry
College
The heat of combustion of liquid ethylene glycol, C2H6O2 is -1189.2 kJ/mol. In an experiment 4.34 g of this compound was burnt completely and the heat evolved raised the temperature of y gram of water from 27.5 C to 45.5 C. Calculate the value of y (mass of water used).
Chemistry
High School
What is the change in the nucleus that results from the following decay scenarios? (A) emission of a b particles (B)emission of a b+ particle (C) capture of an electron
Chemistry
High School
the tollen's test is the reaction of aldehydes with silver(i) ions in basic solution to form silver metal and a carboxylate. reaction of 2 silver 1 ions with a generic aldehyde and 3 hydroxide ions to form 2 silver atoms, a generic carboxylate, and 2 water molecules. which species is being oxidized in the reaction? aldehyde which species is being reduced in the reaction? silver(i) ion which species is the visual indicator of a positive test? silver metal
Chemistry
High School
100 POINTS - A sample of crushed rock is found to have 4. 81 x10^21 atoms of gold, how many moles of gold are present in this sample? SHOW WORK INCLUDING FORMULA : THANK YOU
Chemistry
High School
maintaining close control over the temperature at which municipal solid waste is burned in an incinerator minimizes the emission of:
Chemistry
High School
How many moles are found in 206.08 L of Carbon monoxide gas at STP?
Chemistry
High School
A chemical labeled as ________ will inhibit bacterial growth but will not kill them.
Chemistry
High School
how many grams of nabr are dissolved in 300 ml of 2.0 m nabr solution? report your answer to the hundredths place, not including units when you type your answer in the provided space.
Chemistry
High School
Calculate the freezing point and the boiling point of each of the following aqueous solutions. (Assume complete dissociation. Assume that water freezes at 0.00C and boils at 1.86C 100.000C. K = 0.51C Kb = molal molal a. 0.060 m MgCl2 T = C T = C b. 0.060 m FeCl3 T = C To = C
Chemistry
College
What is the value of for this aqueous reaction at 298 K?A+BC+D=17.32 kJ/molK= ?
Chemistry
High School
(06.03 LC)Which of the following would cause an increase in the pressure inside a sealed container of gas? (4 points)Group of answer choicesA leak in the containerAn increase in temperatureAn increase in the size of the containerRemoval of half of the gas
Chemistry
High School
What is the concentration of lithium ions in 0.350 M LiPO?Answer ASAP DUE TODAY
Chemistry
High School
In the SN1 reaction of 2-chloro-2-methylpropane with water at different temperatures, the following reaction rate constants were obtained: 17C, 0. 0052 s-1; 30C, 0. 0202 s-1; 42C, 0. 0608 s-1. Calculate the half-life of this reaction at 36C. In seconds
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