A compound contains potassium, nitrogen, and oxygen. the experimental analysis gave values of 45.942 % potassium and 16.458 % nitrogen, by weight, the remainder is oxygen. what is the empirical formula of the compound?

Which of these changes produces the greatest increase in entropy? (1) CaCO3 (s) - - > CaO (s) + CO2 (g) (2) 2 Mg (s) + O2 (g) - - > 2 MgO (s) (3) H2O (g) - - > H2O (l) (4) CO2 (g) - - > CO2 (s)

What are ceres, ida, and gaspra

Chemical reactions chemical equilibrium occurs when the rates of the reactions a. equal out in both directions. b. increase from reactant to product. c. increase from product to reactant. d. decrease from reactant to produ

An atom that has a charge due to loosing or gaining electrons is called?

Acetylene (c2h2) undergoes combustion in excess oxygen to generate gaseous carbon dioxide and water. given δh°f[co2 (g) ] = - 393.5 kj/mol, δh°f[h2o (g) ] = - 241.8 kj/mol, and δh°f[c2h2 (g) ] = 226.6 kj/mol, how much energy is released (kj) when 10.

Convert 3.57 moles of aluminum to grams

An average microwave uses a frequency of 2.54 GHz. How much energy is emitted?

Why scientist form a hypothesis

Step two of the procedure states: "Using sterile technique, place a loopful of inoculum from the M. luteus culture in the drop of nigrosin and mix." Which of the procedures qualifies as sterile technique?

If 4.34 moles of potassium react with excess water, how many moles of hydrogen gas would be produced at STP