04/23/20

Gas Laws Chemistry
A sample of air has a volume of 105 mL at 59 ◦C. At what temperature will its volume be 45 mL at constant pressure?
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04/22/20

how many moles of KCI will i obtain?
2 KCIO3 -> 3 O2 + 2 KCI12 moles of KCIO3 x = moles of KCI
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04/22/20

Gas Law Chemistry
1) A weather balloon at Earth’s surface has a volume of 3.9 L at 296 K and 792 mm Hg. If the balloon is released and the volume reaches 4.07 L at 718 mm Hg, what is the temperature?2) A flask... more
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04/20/20

Help me understand this question
If 3.0 J  of work is done on a system and the internal energy of the system increases by 17.0 J,  how much heat was added to the system?
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04/19/20

I got confused with calculating the molar mass

Trial# Mass of Mg (g) Vol of H2 (mL) Barometric Pressure (mmHg) Temperature Calculated Molar Mass of... more
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04/18/20

Determine the volume occupied by 0.582 moles of a gas at 15°C if the pressure is 622 mmHg.
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04/18/20

What is the volume of a gas at -20°C if the gas occupied 50.0 cm3 at a temperature of 0°C?
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04/18/20

What is the volume of hydrogen at a pressure of 1.06 atm if 200 cm3 of hydrogen is collected at a pressure of 1.00 atm?
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04/15/20

If 12 L of a 1.4 mol/L hydrochloric acid (HCl) solution is mixed with 7 L of a 0.75 mol/L HCl solution, How many moles of HCl are in the final mixture?
The mole (mol) is a unit used to describe the amount of an element or compound. The concentration of a chemical solution is often described as the number of moles of compound per litre of total... more
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04/15/20

What is the pressure of a fixed volume of hydrogen gas at 32.9°C if it has a pressure of 1.39 atm at 15.0°C?
What is the pressure of a fixed volume of hydrogen gas at 32.9°C if it has a pressure of 1.39 atm at 15.0°C?
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04/15/20

What is the total pressure exerted by a mixture containing four gases if the partial pressures are 43.3 atm, 83.5 atm, 64.2 atm, and 6.3 atm? Solve the the nearest two decimal places.
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04/15/20

A sample of PH3 gas is 60.67 mL at 259.24 K. What will be the new temperature if the gas is compressed to 36.8 mL under constant pressure?
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04/15/20

A sample of carbon dioxide occupies a volume of 2.7 L at 127 kPa. What pressure in kPa would the gas exert if the volume were changed to 4.6 L? Solve the the nearest two decimal places.
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04/15/20

A 4.76 mole sample of a gas at 4 atm is in a 12.5 L container. What is the temperature inside the container?
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04/15/20

Gas Law Chemistry
Use Boyle's, Charles's, or Gay-Lussac's law to calculate the missing value in each of the following.(a) V1 = 2.0 L, P1 = 0.79 atm, V2 = 1.0 L, P2 = ? atm(b) V1 = 270 mL, T1 = ?, V2 = 400. mL, T2 =... more
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04/14/20

HELP!! I DON'T UNDERSTAND THIS DUMB HOMEWORK
Aaron is leaving at noon for granny's house---186 miles away. He needs to be there at 3 pm. The speed limit is 65 mph. all the way. Can he make it in that time?
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04/11/20

If a 3.6 moles of an ideal gas occupies 150 mL tank at a temperature of -5 °C, what is the pressure inside the tank?
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04/10/20

Chemistry intro help
For the chemical reaction, 3KOH+H3PO4⟶K3PO4+3H2Owhat mass of phosphoric acid in grams is needed to produce 5.37 mol of water?
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04/09/20

What is the final chloride ion concentration when 43. g AlCl3 is dissolved in enough water to make 774. mL of solution? The molar mass of AlCl3 is 133.340 g/mol.
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04/09/20

What is the slope of the line through (-7,-2) and (-6,7)
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04/08/20

Chemistry question
How many isomers exist that have the molecular formula C4H10? three one four none two
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04/08/20

A toy boat is seen floating down a river.

The toy boat is first spotted feet away. minutes later the toy boat is feet away, making a angle between the two sightings. How far did the toy boat travel?
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04/08/20

age problem algebra
Kevin is 3 years older than Daniel. Two years ago, Kevin was 4 times as old as Daniel. how old is daniel now.
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04/08/20

age problem algebra
Ishaan is 2 times as old as Christopher. 35 years ago, Ishaan was 7 times as old as Christopher. how old is ishann now?
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04/06/20

As element 12 forms an ion, it
a) gains 2 electronsb) loses 2 electronsc) gains 1 electrond) losses 1 electrone) no correct response
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