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zheka24 [161]
2 years ago
5

Select odd one out. I) O II) Na III) Cu IV) Ag

Chemistry
2 answers:
USPshnik [31]2 years ago
4 0

Explanation:

0 is the odd one...............

and rest are metals and they lose electron and 0 gain electron and is non metal

Orlov [11]2 years ago
3 0
I) O , is the odd one out because Na, Cu , Ag are all metals while O is a nonmetal ( look from periodic table )
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If 38.5 grams of potassium react with excess oxygen gas, how many grams of potassium oxide can be produced? 4K + O2 yields 2K2O
Lera25 [3.4K]

Answer:

46.40 g.

Explanation:

  • It is a stichiometric problem.
  • The balanced equation of the reaction: 4K + O₂ → 2K₂O.
  • It is clear that 4.0 moles of K reacts with 1.0 mole of oxygen produces 2.0 moles of K₂O.
  • We should convert the mass of K (38.5 g) into moles using the relation:

<em>n = mass / molar mass,</em>

n = (38.5 g) / (39.098 g/mol) = 0.985 mole.

<em>Using cross multiplication:</em>

4.0 moles of K produces → 2.0 moles of K₂O, from the stichiometry.

0.985 mole of K produces → ??? moles of K₂O.

∴ The number of moles of K₂O produced = (0.985 mole) (2.0 mole) / (4.0 mole) = 0.4925 mole ≅ 0.5 mole.

  • Now, we can get the mass of K₂O:

∴ mass = n x molar mass = (0.5 mole) (94.2 g/mol) = 46.40 g.

6 0
3 years ago
What is the mass of a liquid having a density of 1.40 g/mL and a volume of 3.090 L
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It has a mass of 4.326 grams. 


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When two ions form an ionic bond, what type of compound is formed?
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it is c. ionic compound just because it says ionic. can't be a crystal since there's no links to an ionic bond connected to crystals (and if it were it'd depend on the elements and the thingy majig itself right) and a covalent bond is an entirely different bond which isn't related to ionic. hope this helped, and i hope you have a good day too! :D

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In just thomsons experiments with electricity he showed that an electrical current can be
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