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In a certain city electricity costs .15$ per Kw/hr. Explain what is the annual cost to for electricity to power a lamp post for 7 hrs a day with
a) 100 watt bulb
b) 25 watt bulb
While an additional mol of gas is added at constant temperature as well as volume to a flask containing 2.00 mol of gas at 25C and 1.00atm pressure, the pressure increases to 1.60 atm.
A sample of nitrogen gas that occupies a volume of 31.2 L at a temperature of 0 oC and a pressure of 1 atm contains , answer in moles of gas please.
if 98 g grams of CaCN2 reacts with 59 g grams of H2O, what mass of NH3 will be formed.
A weather ballon is filled with helium to a volume of 305L at 28 degree celcius and 751 mmHg . The ballon ascends to and altitude where the pressure is 504 mmHg and temperature
Draw the phase diagram of water and put a on the phase diagram to show the pressure and temperature conditions in the day and at night on the moon.
Explain is there a way to understand what goes on what wedges, dashes as well as lines out of the plane, behind the plane and in the plane?
Alcohols are less volatile than ethers of the same molecular weight, but the two classes of compounds have approximately the same solubility in water because:
Barium sulfate,BaSO4 , is used in medical imaging of the gastrointestinal tract because it is opaque to X rays. A barium sulfate solution, sometimes called a cocktail, is ingested by the patient
Consider a macroscopic object of mass 1 g moving with speed 1 cm/s in a 1-D box of length 1 cm. Assuming it obeys the laws of quantum mechanics, which quantum level (n) is the particle in
Solid lithium metal and diatomic fluorine gas react spontaneously. Give the balanced chemical equation (including phases) that describes this reaction.
calculate the energy of a photon of light with a wavelength of 360nm.
what would be the approximate freezing point of 0.1 molar aqueous solution of aluminium chloride at room temperature
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