Answer: The partial pressure of oxygen in the tank is 82.95 kPa.
Explanation:
According to Raoult's law, the partial pressure of a component at a given temperature is equal to the mole fraction of that component multiplied by the total pressure.
where,
= partial pressure of oxygen
= mole fraction of oxygen
= Total pressure
,
where = moles of oxygen =
= moles of Helium =
Thus the partial pressure of oxygen in the tank is 82.95 kPa.
The answer is (d)
Electrons are outside the nuclues in energy levels. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. A neutral atom contains equal numbers of protons and electrons
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Explanation:
Spectator ions refers to elements/molecules that do not form part of the reaction. Basically, these elements/molecules are in the same state in the reactant and product side. From the given reaction, Ca and SO4 change their state from aqueous to solid and Na and Cl do not change their state. Therefore, Na and Cl are spectator ions and Ca and SO4 are not spectator ions.
Answer:
The correct option is C.
The 3 and 2 to the right of the components are subscriptions.