Dalton's Law of Partial Pressures, commonly applied to ideal gases, explains that the partial pressures of individual, non-reacting gases are equal to the total pressure exerted by the gas mixture. The given gas mixture composed of 90% argon and 10% carbon dioxide has the following partial pressures: 3.6 atm for argon and 0.4 atm for carbon dioxide (answer).
The student would find the water and sand, because salt dissolves in water unless it was ocean water or sea water
To separate some ethanol from water, Jane needs to use the method of simple distillation.
Simple distillation is a separation method in which two liquids can be separated from each other based on differences in boiling point.
Since water has a higher boiling point than ethanol, ethanol is collected first as the distillation proceeds.
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In NaMnO₄, Mn has the highest oxidation number.
The question is incomplete, the complete question is;
Which of the following species contains manganese with the highest oxidation number?
A) Mn
B) MnF₂
C) Mn₃(PO₄)₂
D) MnCl₄
E) NaMnO₄
In order to ascertain the specie that contains manganese with the highest oxidation number, we must calculate the oxidation number of manganese in each of the species one after the other.
1) For Mn, the oxidation number of Mn is zero because the atom is uncombined.
2) For MnF₂;
Mn has an oxidation number of +2
3) For Mn₃(PO₄)₂
Mn has an oxidation number of +2
4) For MnCl₄
Mn has an oxidation number of +4
5) For NaMnO₄
Mn has an oxidation number of +7
Hence in NaMnO₄, Mn has the highest oxidation number.
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Answer:
The molecular formula of the compound is 
.
Explanation:
Let consider that given percentages are mass percentages, so that mass of each element are determined by multiplying molar massof the organic acid by respective proportion. That is:
Carbon
Hydrogen
Oxygen
Now, the number of moles (
), measured in moles, of each element are calculated by the following expression:
Where:
- Mass of the element, measured in grams.
- Molar mass of the element, measured in grams per mol.
Carbon (, 
)
Hydrogen (, 
)
Oxygen (, 
)
For each mole of organic acid, there are 7 moles of carbon, 6 moles of hydrogen and 2 moles of oxygen. Hence, the molecular formula of the compound is:
