If 3.17 moles of ethane, C2H6 undergo combustion,according to the unbalanced equation C2H6+O2–> CO2+H2O, how many moles of oxygen are required?
A small immersion heater is rated at 400W. Estimate how long it will take to heat a cup of soup (assume this is 200 ml of water) from 23oC to 87oC. A milliliter is a cubic centimeter.
To identify a diatomic gas (rm X_2), a researcher carried out the following experiment: She weighed an empty 1.00-rm L bulb, then filled it with the gas at 1.10 rm atm and 23.0 ^circrm C and weighed it again. The difference in mass was 1.27 rm g. Identify the gas.Express your answer as a chemical […]
Ensure all solar system objects are visible by checking all options under Solar System in the View menu and under the Labels menu check Planets-Moons. Beginning at sunset and looking toward the east, advance time forward (I recommend using 30x). Which dwarf planet was first to rise over the horizon? Makemake Ceres Pluto Eris What is the azimuth of the object in the […]
Neurotransmitters are chemical substances that neurons use to communicate with other neurons, muscles and glands. Describe at least one of the classes of neurotransmitters and its (their) functions.
Please provide references Debate whether or not you believe that the earth can support a human population of 8 to 10 billion sufficiently to provide a decent standard of living to them all. Why or why not? Next, specify what constitutes a decent standard of living to you; then, describe two (2) factors that you […]
how fast must a 144.1g baseball travel in order to have a de Broglie wavelength that is equal to that of an x-ray photon with = 73 pm?m/s
a sample of 20.0ml of .10M CH3NH2 is titrated with .15M HCl. the Kb for CH3NH2 = 4.2 X 10^4
A 32.0-g sample of water at 290. K is mixed with 51.0 g water at 340. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
At 55.0C, what is the vapor pressure of a solution prepared by dissolving 75.8 g of LiF in 265 g of water?
