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irina1246 [14]
3 years ago
10

Please help! 35 points for a valid answer!

Chemistry
2 answers:
Y_Kistochka [10]3 years ago
8 0

Answer:

The potential difference is caused by the ability of electrons to flow from one half cell to the other. Electrons are able to move between electrodes because the chemical reaction is a redox reaction. ... The cell potential (Ecell) is measured in voltage (V), which allows us to give a certain value to the cell potential.

Explanation:

Furkat [3]3 years ago
6 0

Answer:

Oxidation  half  reaction  is  written   as    follows when  using  using  reduction potential  chart

example  when  using  copper  it is  written  as  follows

CU2+   +2e-  --> c(s)  +0.34v

oxidasation  is the  loos  of  electron  hence copper oxidation  potential  is  as  follows

cu (s)  -->  CU2+   +2e    -0.34v

Explanation:

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What substance is neither an acid nor a base? How does it stay neutral? HURRY PLS
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Answer:

21. Most metals are brittle.

22. increases from top to bottom within the group

23. Neon is the most stable element because its highest occupied energy level is filled.

24. transfer of electrons

25. electrons are not shared equally between atoms

26. BeCl2

27. double-replacement and decomposition

28. exothermic

29. The reaction rate decreases.

30. The salt dissolved most quickly in the warm water.

31. saturated

32. feels slippery

33. hydroxide ions in solution

34. stay about the same

35-40. I do not know.

41. a bee hovering around a bee hive

42. the number of valence electrons in atoms of the element

Explanation:

21. Metals are ductile and malleable (conveniently also characteristics for chewing gum). They are stretchy and squishy. Brittle is the opposite of stretchy and squishy, and is a characteristic of non-metals.

22. On the periodic table, elements higher up are safer to use in labs. They are safer because they are less likely to react with other substances. Therefore the tendency to react with other substances increases from top to bottom within the group.

23. "Noble gases stable" (periodic table song by ASAP Science). Neon is a noble gas, therefore it is stable. When elements have only one electron to gain or lose, they are very reactive or least stable.

24. The formation of an ionic bond (metal + non-metal) is caused by the giving and receiving of electrons. Neutrons and protons do not transfer. Electrons are shared in covalent/molecular bonds (between non-metals).

25. A polar covalent bond occurs between non-metals, therefore they share electrons (ionic bonds transfer electrons). Non-metals become anions (whereas metals become cations). Polar bonds have unequal sharing and nonpolar bonds have equal sharing.

26. A one-to-two ratio of  beryllium ions to chloride ions means for every Be, there are two Cl. The number of atoms is represented by the ratio, and the numbers of atoms are written as subscripts after the element symbol.

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