Chemistry, 17.04.2020 01:25 greekfreekisdbz
Calculate the heat of reaction of the two chemicals. Assume that the specific heat capacity of the two chemicals and the spray is the same as that of water, 4.19×103J/kg⋅K, and that the initial temperature of the chemicals is 20∘C.
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, 21.06.2019 22:30
If you want to create an electrical current, which situation would produce a solution capable of this
Answers: 3
Chemistry, 22.06.2019 03:50
Express the following number in scientific notation. 0.026890 =
Answers: 1
Chemistry, 22.06.2019 17:10
Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]
Answers: 2
Calculate the heat of reaction of the two chemicals. Assume that the specific heat capacity of the t...
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