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Energy must be transferred into or out of a system in order to cause phase change.In addition changes in the energy can be
1. 1 answer
2. 573 views
Energy must be transferred into or out of a system in order to cause phase change.In addition changes in the energy can be
1. 0 answers
2. 536 views
Energy must be transferred into or out of a system in order to cause phase change.In addition changes in the energy can be
1. 1 answer
2. 483 views
are all concurrent lines are intersecting lines?
1. 1 answer
2. 451 views
1)Thallium (I) is oxidized by cerium (IV) as follows: Tl+ + 2 Ce+4  Tl+3 + 2 Ce+3The elementary steps, in the presence of
1. 2 answers
2. 1,321 views
A restaurant serves tea in aluminum mugs. The aluminum mug has a mass of 125 g, initially at 24.0 oC with 341 mL tea at 80.0oC.
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2. 600 views
Why people feel thirsty after eating salty foods. explain in terms of colligative property
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2. 401 views
8.10 g metal combines with 7.20g of oxygen to form X2O3. What is the relative mass of X
1. 1 answer
2. 577 views
230Th+He____223Po+2 2H+-----please complete this equation
1. 1 answer
2. 382 views
If it costs $3.92 for a gallon of gas, and I fill up with 13.5 gallons once each 1.5 weeks, how much am I spending on gas in a 5
1. 1 answer
2. 456 views
Calculate the volume of fuel needed for a flight if the jet fuel has a density of 0.803kg/L.First use dimensional analysis to
1. 2 answers
2. 2,406 views
Calculate the volume of fuel needed for a flight if the jet fuel has a density of 0.803kg/L.First use dimensional analysis to
1. 1 answer
2. 841 views
What is the Ka of a weak acid (HA) that produces a pH of 3.45 with 0.1M?2.54E-3 3.45E-3 1.27E-6 3.56E-3 5.48E-4
1. 1 answer
2. 596 views
A sample of gas (1.9 mol) is in a flask at 21 °C and 697 mm Hg. The flask is opened and more gas is added to the flask. The new
1. 1 answer
2. 2,047 views
you wish to combine two samples, one sample contains is solid water at 0 degree celsius.The other sample contains liquid water
1. 1 answer
2. 809 views
you wish to combine two samples, one sample contains is solid water at 0 degree celsius.The other sample contains liquid water
1. 1 answer
2. 654 views
you wish to combine two samples, one sample contains is solid water at 0 degree celsius.The other sample contains liquid water
1. 1 answer
2. 627 views
you wish to combine two samples, one sample contains is solid water at 0 degree celsius.The other sample contains liquid water
1. 2 answers
2. 603 views
A disc of wax has several hot metal sampes placed on it. The samples are of diffrent metals. They are all at the same
1. 1 answer
2. 897 views
what is the final temperature of amixture containning 25 grams of ice at -20 degree celciusadded to water at room temperature
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2. 537 views
what is the final temperature of amixture containning 25 grams of ice at -20 degree celciusadded to water at room temperature
1. 4 answers
2. 691 views
what is the final temperature of amixture containning 25 grams of ice at -20 degree celciusadded to water at room temperature
1. 1 answer
2. 726 views
What is the energy released when steam at 25 g of steam at 10 degree celcius is cooled to ice at-10 degree celciuswork heat
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2. 948 views
what is the final temperature of amixture containning 25 grams of ice at -20 degree celciusadded to water at room temperature
1. 1 answer
2. 499 views
What is the final temperature when 54g ice at 0oC is mixed with 200g water at 65oC
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2. 896 views
. A 0.428-gram sample of a mixture of the solids, KCl and KClO3, is heated. If 80.7 mL of oxygen gas is collected over water at
1. 1 answer
2. 984 views

Answers (2)

Molarity=moles/volume in liters 2.5moldm^-3=moles/0.500dm^3 moles=2.5x0.500=1.25 moles
i don't understand can you make it clear

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