Chemistry, 04.05.2021 23:30, josemartinez2025
PLEASE HELP Will Mark you brainliest if you give me the right answers!!
2. A 20.0 gram sample of oxygen gas (O2) is collected at 27 oC and 0.910 atm. What volume of oxygen is this?
A.16.9 L
B.1.22 L
C.1.52 L
D.20.9 L
4.What is the molecular weight of a gas with a density of 1.20 g/L at 750 mmHg and 20 oC?
A. 9.20 g/mol
B.19.2 g/mol
C.49.2 g/mol
D.29.2 g/mol
Answers: 3
Chemistry, 21.06.2019 13:30, kellywelly82
A48 g piece of ice at 0.0 βc is added to a sample of water at 7.4 βc. all of the ice melts and the temperature of the water decreases to 0.0 βc. how many grams of water were in the sample?
Answers: 1
Chemistry, 22.06.2019 18:00, kyllow5644
Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.
Answers: 3
Chemistry, 22.06.2019 20:30, ashley4329
Select all the correct answers. which compounds have the empirical formula ch20? (multiple answers)a. c2h4o2b. c3h603c. ch2o2d. c5h1005e. c6h1206
Answers: 2
Chemistry, 23.06.2019 00:20, destromero
Which diagram represents the phase tha occurs after a solid melts?
Answers: 1
PLEASE HELP Will Mark you brainliest if you give me the right answers!!
2. A 20.0 gram sample of o...
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