What are the characteristics of a substance in the liquid state?
2 answers:
Answer: <span>Made up of particles packed relatively close together, having an indefinite shape but a definite volume
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Start by thinking about how you know a liquid works. For example, think about water. Water you can pour into a cup and it takes the shape of that cup. Pour into a bowl and it takes the shape of the bowl. That means it, unlike a solid, doesn't have a definite shape/has an indefinite shape. You can rule out the first choice.
Also notice that water must have a definite volume. You can't have more water in the cup one second, and less the next second. The volume/space it takes up remains the same. This is unlike a gas, which can spread out or be compressed. That means you can eliminate the last two choices, making B the correct answer.
Chemically speaking, the particles of liquids are close together, but not packed tightly as in a solid (see picture). The electrons and protons make up the atom, but are microscopic. </span><span>
</span>
------
Start by thinking about how you know a liquid works. For example, think about water. Water you can pour into a cup and it takes the shape of that cup. Pour into a bowl and it takes the shape of the bowl. That means it, unlike a solid, doesn't have a definite shape/has an indefinite shape. You can rule out the first choice.
Also notice that water must have a definite volume. You can't have more water in the cup one second, and less the next second. The volume/space it takes up remains the same. This is unlike a gas, which can spread out or be compressed. That means you can eliminate the last two choices, making B the correct answer.
Chemically speaking, the particles of liquids are close together, but not packed tightly as in a solid (see picture). The electrons and protons make up the atom, but are microscopic. </span><span>
</span>
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Answer:
pH ≅ 4.80
Explanation:
Given that:
the volume of HN₃ = 25 mL = 0.025 L
Molarity of HN₃ = 0.150 M
number of moles of HN₃ = 0.025 × 0.150
number of moles of HN₃ = 0.00375 mol
Molarity of NaOH = 0.150 M
the volume of NaOH = 13.3 mL = 0.0133
number of moles of NaOH = 0.0133× 0.150
number of moles of NaOH = 0.001995 mol
The chemical equation for the reaction of this process can be written as:
1 mole of hydrazoic acid react with 1 mole of hydroxide to give nitride ion and water
thus the new number of moles of HN₃ = 0.00375 - 0.001995 = 0.001755 mol
Total volume used in the reaction = 0.025 + 0.0133 = 0.0383 L
Concentration of =
= 0.0458 M
Concentration of =
= 0.0521 M
GIven that :
Ka =
Thus; it's pKa = 4.72
pH ≅ 4.80