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The heat capacity of aluminum is 0.900 J/g degrees Celsius . How much energy is needed to raise the temperature of a 8.50 x 10^2 g block of aluminum from 22.8 degrees Celsius to 94.6 degrees Celsius
E = m*c*(t2 - t1) = 8.5*10^2*0.9*(94.6 - 22.8) = 54927 J
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how many ml of water at 10 degrees celsius (2 significant figures) must be added to 75 ml of water at 35 degrees celsius to obtain a final temperature of 19 degrees celsius?
Q=mCΔT ; where m is the mass of the substance, C is the specific heat of the substance, and ΔT is the difference in temperature.35 -19 = 1619-10 = 916...
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A sample of N2 has 1.70 moles and occupies 3.80 l at 25.0˚C.
A) What volume will it occupy with 2.60 moles?
B) How many moles are in a sample that occupies 1.45 L?
According to the ideal gas law: pV=nRT p ndash; pressure (atm) V ndash; volume (L) n ndash; amount (moles) R ndash; universal gas constant T ndash; temperature (K) P, R,...
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Determine the new volume of a gas at that occpies an original volume of 55 L at 750mmHg and 25 degrees celsius if the pressure is changed to 1.03 atm and the temperature to 30 degrees celsius.
According to the ideal gas equation:P1V1/T1 = P2V2/T2,where P1, V1, T2 - initial pressure, volume and temperature, P2, V2, T2 - pressure, volume and temperatureAs a result:V2 = P1V1T2 /...
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64.7mL of 0.45n sodium hydroxide to neutralize 45mL of acid.
Create 0.65m acid what is the percent and ph balance?
C1V1=C2V2C2 = 64.7*0.45/45 = 0.647 mol;pH = -log[H+] = -log 0.647 = 0.19
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A sample of an ideal gas has a volume of 3.60 L at 13.40 degrees Celsius and 1.30 atm. What is the volume of gas at 24.60 degrees Celsius and 0.990 atm
Combined gas Law P1V1 / T1 = P2V2 / T2 P1 = 1.30 atm V1 = 3.60 L T1 (must be in Kelvin = 13.40 deg C + 273.15) =...
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What is the heat capacity of gold if a 250 g sample needs 133 cal of energy to increase its temperature from 23.0 degrees Celsius to 40.1 degrees Celsius
Q=c*m*(t2-t1); c=Q/[m*(t2-t1)]=133 cal/[0.25 kg*(40.1-23.0)C]=31.1 cal/(kg*C)
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If a gas is at 1.2atm, 25 degrees Celsius, and 10 liters what is the new volume if the pressure is changed to 2.8atm and the temperature to 35 degrees Celsius?
4.43 litersThe general gas equation :P1V1/T1 = P2V2/T2. Where p1=1.2atm; V1= 10 litersT1= 273 + 25=298 KP2=2.8 atmT2= 273+35=308 KV2 - ?V2=(p1*V1*T2)/(T1*p2) ;V2= 4,43 liters
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how many moles of insulin are needed to make 45mL of 0.0050M of insulin solution
Solution:Molarity is the number of moles of solute per liter of solution.Molarity = mol solute / L of solution.Therefore,Moles of insulin = Molarity of insulin × Volume of solutionMoles of...
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A helium balloon occupies 112mL at 90.0 kPa and 34 degrees Celsius. What volume would it occupy at standard temperature and pressure (101.3 kPa 0.00 degrees Celsius)
Use the combined gas law.P1V1/T1 = P2V2/T290*0.112/307 = 101.3*V2/2730.0328 = 0.3711*V2V2 = 0.088L
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