Chemistry, 21.02.2020 17:08 TVASALLO31
Calculate the amount of heat evolved (in kJ) when 13.4 L of SO2 at STP and 15.0 L of O2 at 18˚C at 1.02 atm are
combined. The balanced chemical equation for this reaction follows:
2 SO2 (g) + O2 (g) 2 SO3 (g) ΔH = —198 kJ
Answers: 1
Chemistry, 21.06.2019 19:30
Which answer lists the fundamental forces in order from strongest to weakest
Answers: 1
Chemistry, 21.06.2019 20:30
In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask
Answers: 2
Chemistry, 22.06.2019 14:00
The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
Answers: 3
Calculate the amount of heat evolved (in kJ) when 13.4 L of SO2 at STP and 15.0 L of O2 at 18˚C at 1...
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