Marianne gets dressed and puts on some of her favorite perfume. While applying the perfume, she accidentally gets some in her mo
1 answer:
Answer:
Yogurt displays characteristics of an acid.
Explanation:
The characteristics of an Acid are as follows:
- It has an pH of less than 7
- It has a sour aftertaste(though one shouldn't try it)
- It increases the
concentration of water.
- It reacts with Metals to liberate Hydrogen Gas.
- It gives out
- It turns blue litmus to red.
Only Yogurt displays one of these properties ie. sour taste, therefore it is the only material having characteristic of acid.
Bittery taste and slippery touch are characteristics of bases.
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Explanation:
Concentration ;
The reaction see a change in pressure per second. By the ideal gas law, this quantity would correspond to a change in concentration,
of
where the ideal gas constant .
By definition,
Therefore, for this particular reaction
Answer:
Explanation:
Firstly, we have to find the Molecular mass of potassium oxide ():
atomic mass: 39 u
atomic mass: 16 u
molecular mass:
This means that in 1 mole of there are
and we need to find how many moles there are in
:
1 mole of -----
of
-----
of
This is the quantity of moles in 73.9 g of potassium oxide
Now we can calculate the number of atoms in 73.9 g of potassium oxide by the following relation:
Where:
is the number of atoms in 73.9g of potassium oxide
is the Avogadro's number, which is determined by the number of particles (or atoms) in a mole.
Then:
This is the quantity of atoms in 73.9g of potassium oxide