Chemistry, 07.12.2020 02:10 maustin5323
An air bubble has a volume of 0.500 L at 18 °C. What is the final volume, in L of the gas when the temperature changes to -12°c, if the pressure and amount of
gas do not change?
a. 0.363L
b. 0.490 L
c 0.448 L
d. 0.557L
Answers: 2
Chemistry, 22.06.2019 03:30
At a temperature of 393 k, the temperature of a sample of nitrogen is 1.07 atm what will the pressure be at a temperature of 478 k
Answers: 1
Chemistry, 22.06.2019 07:00
In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?
Answers: 2
Chemistry, 22.06.2019 08:00
Straightforward questions answered in the powerpoint slidesreaction: heating the starting materials under refluxwhat does it mean to heat under reflux? why do we choose water as the reflux solvent? what are boiling chips used for? why do we put a condenser on top of the reaction? why do we add heat and let the reaction stir for 30 minutes? why do we add sulfuric acid to the reaction after it cools as opposed to when it’s still hot? separation: filtration of precipitatewhy don’t we do an aqueous and organic extraction in the separatory funnel? why do you rinse the salicylic acid on the filter with ice cold water? purification: recrystallization of salicylic acid (no hot filtration needed)what is the difference in the amount of room temperature water vs. boiling water needed to dissolve the salicylic acid (assume a 1.2 gram yield of salicylic acid)? remember, in the lab if you need x ml of boiling water to dissolve a solid, then you should add a little more (definitely no more than 1.5 times the theoretical amount) to ensure it doesn’t recrystallize prematurely.analysis: melting point of salicylic acidwhat can you conclude if the melting point of the salicylic acid you just synthesized is 152-155oc and the 1: 1 mix of your product and “synthetic” salicylic acid is 151-154oc?
Answers: 1
Chemistry, 22.06.2019 10:20
In a reaction equation, where are the products located? a.) above the arrow b.) to the right of the arrow c.) to the left of the arrow d.) below the arrow
Answers: 2
An air bubble has a volume of 0.500 L at 18 °C. What is the final volume, in L of the gas when the t...
Mathematics, 01.03.2021 06:40
Mathematics, 01.03.2021 06:50
Engineering, 01.03.2021 06:50
Mathematics, 01.03.2021 06:50
Health, 01.03.2021 06:50
Mathematics, 01.03.2021 06:50
Physics, 01.03.2021 06:50
Mathematics, 01.03.2021 06:50
Chemistry, 01.03.2021 06:50
Social Studies, 01.03.2021 06:50
Mathematics, 01.03.2021 06:50