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irinina [24]
3 years ago
8

Which type of stoichiometry problems does not require the use of molar mass?

Chemistry
1 answer:
Arlecino [84]3 years ago
7 0

Answer:

Explanation:

It is volume-volume problems that does not require the use of molar mass.

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At a certain temperature, a mixture of 2 gases, 11.2 g of oxygen and 104.75 of krypton exert a total pressure of 4.25 atm. What
ki77a [65]

Answer:

Pressure of O₂ = 0.93 atm

Pressure of krypton = 3.32 atm

Explanation:

This problem can be solved by using Dalton's Law of Partial Pressures, which states that the partial pressure of a component of a gaseous mixture depends on the mole ratio of said component and the total pressure of the gaseous mixture.

Pₐ = Xₐ * Ptotal

P ₐ  - the partial pressure of component  a  

χ ₐ   - its mole fraction in the mixture

P total  - the total pressure of the mixture

The moles of the two gases are:

moles of O₂ = 11.2/32 = 0.35 moles

moles of krypton = 104.75/83.8 = 1.25 moles

Total moles = 1.25 + 0.35 = 1.6 moles

Xₐ = number of moles of a /total moles in mixture

Pressure of O₂ = 0.35/1.6 *4.25 = 0.93 moles

Pressure of krypton = 1.25/1.6 *4.25 = 3.32 moles

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3 years ago
What type of bond (Ionic, Covalent or Metallic) would be created when carbon bonds with bromine?
Alik [6]

Answer:

Covalent bond

Explanation:

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3 years ago
Investigate why some element’s symbols derived from their old names.
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you know just in order to bring that nostalgia into chemists minds

Explanation:

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3 years ago
Which group 1 metal and group 2 non metal would react together most?​
Talja [164]

Answer:

Potassium and oxygen

Explanation:

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why do you think that sodium chloride has to be heated to 800c before melting, but candle wax will start to melt at 50c?
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Answer:

Sodium chloride is an ionic compound which makes it stronger and have a higher melting and boiling point. Candle wax is a covalent compound so it has a low melting point.

Explanation:

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