Answers: 2
Chemistry, 21.06.2019 17:30
This is a mixture that has the same composition throughout.
Answers: 1
Chemistry, 22.06.2019 04:30
There is a single path for electrons. the current decreases when additional resistors are added. the current will be the same in each resistor. these statements best describe a(n) circuit.
Answers: 3
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
9) Given the reaction: N2(g) + O2(g) + 182.6 kJ → 2 NO(g) What is the heat of formation of nitrogen...
History, 09.06.2021 14:00
Mathematics, 09.06.2021 14:00
Mathematics, 09.06.2021 14:00
Social Studies, 09.06.2021 14:00
Mathematics, 09.06.2021 14:00
World Languages, 09.06.2021 14:00
Mathematics, 09.06.2021 14:00
English, 09.06.2021 14:00
Mathematics, 09.06.2021 14:00
English, 09.06.2021 14:00