Chemistry, 25.08.2021 01:00, SoccerHalo
You are asked to identify an unknown liquid that is known to be one of the liquids listed below. You pipet a 3.50-mL sample into a beaker. The empty beaker had a mass of 12.20 g, and the beaker plus the liquid weighed 16.08 g.
Substance Density at 25^0C
Ethylene glycol 1.1088(major component of autumobile antifreeze)
Water 0.9971
Ethanol 0.7893 (alcohol i alcoholic beverages)
Acetic acid 1.0492 (active component of vinegar)
Glycerol 1.2613 (solvent used in home care products)
(a) Calculate the density and identify the unknown.
(b) If you were able to measure the volume to only two significant figures (that is, 3.5 mL, not 3.50 mL), will the results be sufficiently accurate to identify the unknown? Explain.
Answers: 2
Chemistry, 22.06.2019 04:30, homeschool0123
How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer
Answers: 1
Chemistry, 22.06.2019 08:00, wizz4865
Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next
Answers: 2
Chemistry, 22.06.2019 13:10, dookiefadep5n1tt
What type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? view available hint(s) what type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? salt bridge disulfide bridge hydrogen bond hydrophobic interaction
Answers: 1
You are asked to identify an unknown liquid that is known to be one of the liquids listed below. You...
Biology, 10.12.2019 04:31
Mathematics, 10.12.2019 04:31
Geography, 10.12.2019 04:31
History, 10.12.2019 04:31
Mathematics, 10.12.2019 04:31
History, 10.12.2019 04:31
Mathematics, 10.12.2019 04:31