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A weather balloon is filled with 110.0 L of He and launched from sea level (T = 20.0°C, P = 755 torr). The balloon is designed to continue its ascent to an altitude of 30.0 km, where it bursts, releasing a package of meteorological instruments that parachute back to Earth.
If the atmospheric pressure at 30.0 km is 28.0 torr and the temperature is -49.0 °C, what is the volume of the balloon when it bursts?
A mass of 1.20g of silver is plated from a silver nitrate solution in 1:25 hours. Calculate: a) couloumbs, b) faradays and c) amperes necessary for this process.
a chocolate caramel pecan piece of candy contains 115 food calories cai. if the heat energy contained in the piece of
A 149-mL bubble of hot gases at 217°C and 1.70atm escapes from an active volcano What is the temperature, in °C, of the gas in the bubble outside the volcano if the new volume of the bubble is 169mL and the pressure is 0.793atm ?
an unknown amount of CO2 occupies a volume of 9.04 L at 25°C and 1.17 atm pressure. How many moles of CO2 are there in this sample?
It takes 47.0 to raise the temperature of an 10.6 piece of unknown metal from 13.0 to 24.7. What is the specific heat for the metal?
A 0.358 g sample of KAu(CN)2, has 7.48 x 1020 atoms of Au. How many atoms are in this entire sample?
if a temperature increase from 12.0 to 22.0 doubles the rate constant for a reaction what is the value of the
The rate constant of a chemical reaction increased from 0.100s^-1 to 2.90s^-1 upon raising the temperature from 25.0 degree celcius to 43.0 degree celcius
Tests on a sphere are conducted in a wind tunnel at an air speed of U0. the velocity of flow toward the sphere along the longitudinal axis is found to be u=-U0(1-r0^3/x^2) where r0 is the radius of the sphere and x is the distance from its center.
Problem- For the following reactions, identify the type (combination, combustion, decomposition, displacement, methathesis [double-displacement)] neutralization), balance the reaction, and for the redox reactions identify the oxidizing agent and r..
Explain what mass of CsBr must be added to 0.500L of water (d=100g/mL) to produce a 0.655m solution? Explain what are the mole fraction as well as mass percent of CsBr
Question- Hydrogen atoms are excited by a laser to the n = 4 state and then allowed to emit. What is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system
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