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4KNO3(s)----->2K2O(s)+2N2(g)+5O2(g)How many moles of oxygen are formed when 58.6 g of KNO3 decomposes according to the following reaction? The molar mass of KNO3 is 101.11 g/mol.
This reaction's half life is 35.0 at 680C. If you had 520 mmHg of phosphihne in an 8.00 L flask, how long does it take for the pressure in the flask to rise to standard pressure
In the lower troposphere, ozone is one of the components of photochemical smog. It is generated in air when nitrogen dioxide, formed by the oxidation of nitrogen monoxide from car exhaust, reacts by the following mechanism.
This question has two parts: Given that Ka for HF is 6.3 x 10^-4 at 25 degrees C, what is the value of KB for F- at 25 degrees C? and Given that Kb for CH3CH2NH2 is 6.3 x 10^-4 at 25 degrees C, what is the value of Ka for CH3CH2NH3+ at 25 degrees ..
Crystalline solids are well-ordered arrays of atoms or molecules. Crystalline solids may be metallic solids, molecular solids, or ionic solids.
to identify a diatomic gas x2 a researcher carried out the following experiement she weiged an empty 1.00l bulb then
Cobalt was used as an internal standard to analyze a sample of titanium with atomic absorption spectroscopy. A mixture was prepared by combining a 4.50 mL Ti solution of unknown concentration with 2.00 mL of a 10.5 micrograms/mL solution of Co
The rate constant for decay of 45Ca20 is 4.233x10-3/day. What is the half-life of 45Ca20? a) 81.86 days b) 163.7 days c) 327.4 days d) 409.3 days e) none of these
Ethylene glycol is used as automobile antifreeze. 6.38g og this compound contains 2.47g of carbon and 0.620g of hydrogen. The rest is oxygen. The molar mass is 62.0g/mole.
A large flask with a volume of 936mL is evacuated and found to have a mass of 134.66 g. it is then filled to a pressure of 0.967atm at 31 C with a gas of unknown molar mass and then reweighed to give a new mass of 135.91 g. what is the molar mass ..
What wavelength radiation (nm) must be used to eject electrons from chromium metal with a velocity of 1.50 x 10^6 m/s? The ionization energu of chromium metal is 7.00 x 10^-19 J
a steam power plant operates on an ideal rankine cycle with two stages of reheat and has a net power output of 120 mw.
When would you do a hot filtration. Why do you wash your crystals after you collect them by filtration
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