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Which of the following is/are an atom, an isotope and an ion?
A. H+B. 2H or deuteriumC. 3H or tritiumD. H2 or hydrogen gasE. All of the choices are atoms, isotopes and ions.
If the coal is burned in a power plant that uses 1800 tons of coal per day, what mass of calcium oxide is required daily to eliminate the sulfur dioxide?
An electron in an excited state of a hydrogen atom emits two photons in succession, the first at 1817 nm and the second at 97.20 nm, to return to the ground state (n=1).
An oxygen tank contains oxygen at a pressure of 70 kPa. When the pressure drops to 36 kPa, the temperature increases from 300 K to 350 K. If the initial volume is 9 L, what is the final volume?
It is important to know if a particular molecule is composed of elements with different electronegativities as well as the structure of the particular molecule to explain the physical properties of the molecule.
A solution of potassium hydroxide of unkown concentration is used to titrate 15.0 mL of a 2.5M sulfuric acid solution. The volume of the base is needed 27.2mL. What is the molarity of the base?
Consider the reaction Cu2S + O2 → 2Cu + SO2. If 55.0 grams of Cu2S is heated in excess O2, what is the mass of Cu that can be produced?
The filterate is blue in color by the product of dissolving CuO. The filter was slightly blue after the CuO was filtered on to filter paper? d.) Not enough magnesium was added to remove all the blue color in the solution?
The element of area in two-dimensional Cartesian coordinates is dxdy ; a and b are constants. b. Normalize the wave function e^(-2r /b )
draw the molecule by placing atoms on a grid and connect with bonds for when the cyclopentane is exposed to Br2 in presence of light.
A solution contains one or more of the following ions: Pb 2+, Ca 2+, and Zn 2+. When sodium chloride is added to the solution, a precipitate forms
An aerosol spray can with a volume of 270 ml contains 3.0 g of propane gas as propellant. what is the pressure in atms if the can is 20 degrees celsius?
If a solution of sodium chloride contains 5.2 NaCl in 900 grams of water. What is the concentration of the solution in parts per million?
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