Hãy tính hóa trị của nguyên tố Mn, Fe, K trong các hợp chất sau: MnO 2 ,
Fe 2 O 3 , K 2 O....
Chemistry, 16.12.2021 16:20 alyssa6383
Hãy tính hóa trị của nguyên tố Mn, Fe, K trong các hợp chất sau: MnO 2 ,
Fe 2 O 3 , K 2 O.
Answers: 3
Chemistry, 22.06.2019 00:10
Which of the following best describes the formation of plasma?
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Chemistry, 22.06.2019 06:30
Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.
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 23.5c. 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
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