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4 years ago

How do particles tend to move in solids? Please explain your answer

Chemistry

2 answers:

AlexFokin [52]4 years ago

6 0

They vibrate abour fixed points.

Since particles have charges that attract each other it stays intact.

Musya8 [376]4 years ago

6 0

Answer: Option (d) is the correct answer.

Explanation:

Since, it is known that in solids strong intermolecular forces of attraction exists because of which particles are much closer to each other. Hence, they have definite shape and volume.

Particles of a solid are unable to move from their initial position unless an external force is applied to them. So, when no external force is applied then particles of a solid tend to vibrate at their fixed points.

Hence, we can conclude that particles tend to move in solids as they vibrate about fixed points.

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3 years ago

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Phosphorus-32 has a half-life of 14.3 days. how many grams of phosphorus-32 remain after 71.5 days if you start with 4.00 grams?

almond37 [142]

Answer : 0.125 g

Explanation : If you are calculating the half life of P-32 which has half life of 14.3 days and you want to calculate how many grams are remaining after 71.3 days if yo are starting with 4 g?

starting you can calculate the number of half life P-32 undergoes first,

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now, to calculate the remaining mass,

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3 years ago

Petunia needs 66.48 grams of potassium hydroxide (KOH) to run a reaction in class. How many moles of potassium hydroxide does sh

Kaylis [27]

Answer:

She needs 1.19 moles of potassium hydroxide.

Explanation:

Being the molar mass of the elements:

K= 39 g/mole
O= 16 g/mole
H= 1 g/mole

then the molar mass of potassium hydroxide is:

KOH= 39 g/mole + 16 g/mole + 1 g/mole= 56 g/mole

Being the mass of one mole of a substance, which can be an element or a compound, you can apply the following rule of three: if 56 g of KOH are present in 1 mole, 66.48 g of KOH in how many moles of the compound are they?

$moles of KOH=\frac{66.48 grams*1 mole}{56 grams}$

moles of KOH= 1.19

She needs 1.19 moles of potassium hydroxide.

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3 years ago