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Chemistry, 21.06.2019 20:30
Un cierto gas tiene un volumen de 800ml a 80Ā°c y 600ml a 80Ā°c y 600mmhg de presiĆ³n. Āæcual serĆ” el volumen del gas a condiciones normales? sĆ el gas es oxĆgeno, ĀæcuĆ”l serĆ” su peso? y ĀæcuĆ”ntas molĆ©culas estĆ”n presentes en el sistema?
Answers: 2
Chemistry, 22.06.2019 17:00
How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process
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 23.5ļ°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/gādegree c). calculate the calorimeter constant. (smĪ“t)warm water = -[(smĪ“t)cold water + (calorimeterĪ“tcold water)]
Answers: 2
Why is the atomic mass for calcium a decimal? how many protons does it have? neutrons? electrons?...
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