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Find the amount concentration of the anion:
0.50mol/L barium chloride, BaCl2
A 22.11 g sample of liquid nitrogen (N2) starts at a temperature of -288 oC. How much energy is required to heat it to its boiling point of -196 oC and boil it completely?
s = 1.04 J/goC delta Hv = 2.79 kJ/mol
find the amount of heat gained by a 100 gram steel ball with a specific heat of 0.107 cal/goC from 25oC to 100oC
use the formula q=mc t to calculate the number of joules gained by the 50 mL sample of water
Write the equation for the following processes: the beta decay of technetium-98
154 mL of 3.87 mol/L barium hydroxide is needed to fully react with 146 mL of lithium sulfate solution what is the molar concentration of lithium sulfate solution
how many grams of lead nitrate is needed to make 450 mL solution with the concentration of 1.25 mol/L
A 0.8770g sample containing NaCl and KCl was treated with AgNO3. The AgCl formed had a mass of 1.913g. Calculate the %Na and %K in the sample
Solve the ff problem.
3. What pressure is required to reduce the volume of a sample of air from 1.0 L to 0.0250
L? The original pressure on the sample is 98 kPa, the amount and temperature of the
sample remain fixed.
4. A 2450 ml sample of a gas at 285°C and 620 torr is compressed to a volume of 850 ml at
150°C. What is the new pressure of the gas?
Solve the following problem
1. A gas occupies a volume of 500 cm 3 at 27⁰C. What will be the volume of the gas when
the temperature is -48⁰C? Assume pressure and moles are constant.
2. The pressure in an automobile tire is 29.8 psi on a cold morning of 20°C. After it is
driven a while, the temperature rises to 43°C. What is the pressure in the tire assuming
that the volume remains constant?
