Question

Medal to best

Answer 1

Investigating changes in colligative properties involves the measurement of a solution’s concentration in molality instead of molarity because

the mass of the solvent does not change, but its volume does change, as temperature changes.

the volume of a solution can be measured more accurately than the mass of a solution.

the volume of a solution does not change, but its mass does change, as temperature changes.

the mass of a solvent can be measured more accurately than the volume of a solvent.

Answer 2

Why am I tagged?

Answer 3

mewww

Answer 4

I was wondering if you guys could help me

Answer 5

1st one should be correct.

Answer 6

What about



What is true about the dilution of a solution?

the amount of solvent increases

the concentration increases

the amount of solute decreases

the volume remains the same

Answer 7

plse check these for your answers

http://answers.yahoo.com/question/index?qid=20110610115210AAzfUb5

http://www.lsbu.ac.uk/water/collig.html

Answer 8

B

Answer 9

what about


At room temperature, 20°C, water (H2O) is a liquid and oxygen (O2) is a gas. Based on kinetic molecular theory, which answer best describes the states of the two fluids?

The particles in the liquid have greater kinetic energy than the particles in the gas.

The particles in both substances are able to fill any container because both have indefinite shape and indefinite volume.

The particles in both substances are able to flow because of weak intermolecular forces.

Water molecules have a lower boiling temperature than oxygen molecules, so at room temperature they exist as a liquid rather than a gas.

Answer 10

D

Answer 11

How many grams of Ba are needed to react completely with 1.30 L of a 6.00 M HBr solution?

Ba + 2HBr yields BaBr2 + H2

3.90 g

7.80 g

534 g

632 g

Answer 12

http://answers.yahoo.com/question/index?qid=20110112104741AAyPVoK

Answer 13

@vikrantg4 @msingh @Ryleighblue @whpalmer4 @e.mccormick @Ell @Ryleighblue @TuringTest @TEndy1 @thardyyyy @yrelhan4 @ParthKohli @Preetha @amistre64 @A_clan @Aminah14 @stabar @sexygirl7400 @Shawna.marie @dan815 @DLS @damien @ganeshie8 @jhonyy9 @jenniem29 @LoveYou*69 @LazyBoy @littleRob @cwrw238 @Christos @charlotte123 @churrity @charlieberzak @caozeyuan @vikrantg4 @bobbylynn @bakonloverk @briannashepard @nincompoop @mathstudent55 @msingh @mangorox @missMob @mlb004 @mind2000

Answer 14

Make sure you get the mass of Ba

Answer 15

a stone is dropped from a height of 7.70m. how fast is it going when it reaches the ground?

Answer 16

You would use the formula of acceleration do to gravity ^^
This is a physics question right? @jenniem29

Answer 17

yes it is

Answer 18

so what would the answer be?

Answer 19

@vikrantg4 @msingh @Ryleighblue @whpalmer4 @e.mccormick @Ell @Ryleighblue @TuringTest @TEndy1 @thardyyyy @yrelhan4 @ParthKohli @Preetha @amistre64 @A_clan @Aminah14 @stabar @sexygirl7400 @Shawna.marie @dan815 @DLS @damien @ganeshie8 @jhonyy9 @jenniem29 @LoveYou*69 @LazyBoy @littleRob @cwrw238 @Christos @charlotte123 @churrity @charlieberzak @caozeyuan @vikrantg4 @bobbylynn @bakonloverk @briannashepard @nincompoop @mathstudent55 @msingh @mangorox @missMob @mlb004 @mind2000

Answer 20

@jenniem29 do you know the formula?

Answer 21

no :c

Answer 22

@bhjfbsrfk I'm so sorry, but i'm not good at those problems:( I hope you find someone to help you though!:)

Answer 23

thanks

Answer 24

How does the arrangement of the particles in a liquid compare to that of a gas?

The arrangement of a liquid's particles is the same as that of a gas.

The arrangement of a liquid's particles will depend on the liquid's mass.

The particles in a liquid are farther apart than the particles in a gas.

The particles in a liquid are closer together than the particles in a gas.

Answer 25

I think it would be D because particles in a gas are separated and 'loose'

Answer 26

Which of the following gases will have the slowest rate of effusion at a given temperature?

H2

Ar

N2

He

Answer 27

Hmm, I think it would depend on where they are located on the periodic table

Answer 28

do u no which it would be

http://www.ptable.com/

Answer 29

@Ell

Answer 30

I dont think it would be He or Ar b/c they are neutral
I would say H2 ; sorry if its wrong!

Answer 31

Which phase of matter consists of particles that are held together but have the ability to flow past each other?

gas

liquid

plasma

solid

Answer 32

i think c

Answer 33

Well it wouldn't be D and It wouldn't be A. C sounds right

Answer 34

Assuming all volume measurements are made at the same temperature and pressure, how many liters of carbon monoxide gas would it take to react completely with 11.8 liters of oxygen gas? Show all of the steps taken to solve this problem.

Balanced equation: 2 CO(g) + O2 (g) yields 2 CO2 (g)

Answer 35

Haha(: thats another one im not good at. sorry!

Answer 36

oh ok

Answer 37

a 1210kg rollercoaster car is moving 8.31 m/s. before entering the station, it first rolls up a 2.26m hill. how fast is it moving then? HEELLLPPPPP!!!