Answer:
explanation and image attached
Explanation:
Our aim is to draw a structure of XeO2F2 whith the least formal charges. We must remember that the compound has 34 valence electrons.
To obtain the least formal charges then Xe must have a total of twelve electrons on its valence shell instead of eight.
The other atoms around the central Xe atom are arranged as shown in the image attached.
Image Credit: UCLA
Chemistry voltaic and electrolytic cell help?
Give the sign of the electrodes and the reaction that occurs at each for both voltaic and electrolytic cells. Yes this is homework, but I'm not...
Update:
and what does the question mean by "the sign of the electrodes"?
3 answers · Chemistry
Best Answer
In a voltaic cell (one that happens spontaneously), electrons flow from a negative electrode to a positive electrode (anode ==> cathode). The reaction that happens is a redox reaction where the anode is oxidized (goes from a solid to an ion) and the cathode is reduced (going from an ion to a solid).
B. <span>The heat lost by the metal will equal the heat gained by the water</span>
Answer: -
100 grams
Explanation: -
Mass of Oxygen = 40 g
Chemical formula of oxygen gas = O2
Molar mass of oxygen = 16 x 2 = 32 gram
Atomic mass of Mg = 24g
Molar mass of MgO = 24 x 1 + 16 x 1 =40 gram
The balanced chemical equation for the reaction is
2Mg + O2 -- > 2 MgO
So from the balanced equation we see that 1 O2 react to give 2 MgO
32 grams of O2 react to give 2 x 40 gram of MgO
40 grams of O2 react to give
=100 gram of MgO