Which force is a contact force
2 answers:
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Answer:
<h2>2.60 L</h2>Explanation:
The new volume can be found by using the formula for Boyle's law which is
Since we are finding the new volume
From the question we have
We have the final answer as
<h3>2.60 L</h3>Hope this helps you
<u>Complete Question:</u>
what mass of zinc is needed to react with 23.1 g of phosphoric acid according tot he equation?
3 Zn + 2 H₃PO₄ = 3 H₂ + Zn₃(PO₄)₂
<u>Answer:</u>
22.98 g, the mass of zinc (Zn) is needed to react with 23.1 g of phosphoric acid according to the given equation.
<u>Explanation:</u>
Given chemical reaction:
3 Zn + 2 H₃PO₄ = 3 H₂ + Zn₃(PO₄)₂
If the substance’ molecular weight is the number of grams required per mole, the number of moles expressed as a given quantity of substances shall correspond to the grams of that substance divided by the molecular weight. Hence,
To find no. of moles of phosphoric acid:
Given:
mass of phosphoric acid = 23.1 g
molar weight of of phosphoric acid = 97.994 = 98 g/mole
Therefore,
no. of moles of phosphoric acid
Look into the given chemical reaction and divide as the following:
If 2 moles of H₃PO₄ reacts with 3 moles of Zn then 0.2357 moles of H₃PO₄ reacts with X moles of Zn. Then,
Now, calculate mass of zinc as follows, we know
molar mass of zinc is 65 g/mol
Mass of zinc = 22.98 g