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In each case, decide if the change is a chemical or physical change.
(a) A cup of household bleach changes the color of your favorite T-shirt from purple to pink.
(b) Water vapor in your exhaled breath condenses in the air on a cold day.
(c) Plants use carbon dioxide from the air to make sugar.
(d) Butter melts when placed in the sun.
using le chateliers principle to predict the effect of a change in conditions on a chemical equilibrium.nbsple
What is the empirical formula of the compound
If an ideal gas is expanded reversibly, the heat absorbed qrev, can be expressed by the differential dqrev = Cv dT + P dV, Where Cv is a constant (called heat capacity at constant volume). Show that dqrev is an inexact differential.
An emission line from K atoms is found to have two closely spaced components, one at 766.70 nm and the other at 770.11 nm. Account for this observation, and deduce what information you can.
A 100 mL of a 0.100 M solution of vinegar (acetic acid, CH3COOH) is mixed with 100 mL of a 0.100 M baking soda (sodium bicarbonate) solution and a reaction proceeds that generates carbon dioxide, water and sodium acetate.
I am working on ordering molecules from least to most exothermic (strength of ionic bonds). Please explain why NaI is less exothermic than LiBr.
Assuming 100% dissociation, calculate the freezing point and boiling point of 3.27 m AgNO3(aq). Constants may be found here.
write an assay paper review on the application of suspended particles or particles solid form liquid or gas such as in
a 20.00 ml aliquot of 0.120 m cu solution is titrated with a 0.100 m solution of ce4 according to the following
Question- Monodisperse polyarcylonitrile contains molecules with the general formula -(CH2CHCN)n-, where n is typically greater than 10,000. Given that a sample of this compound weighs 252.6 grams and contains 4.443x10^19 molecules of -(CH2CHCN)n-..
what is the half-life of a compound if 87 percent of a given sample of the compound decomposes in 65 min? assume
A buffer was prepared by mixing a solution that is 0.285 M in HA and 0.385 in A-. The pH of this buffer was 4.435. then to 405 mL of this buffer solution was added to 21.5 mL of 2.0 M HCl. What is the pH of this new solution?
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