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katrin [286]
3 years ago
7

A chemist analyze an unknown liquid .the chemist takes samples from the top ,middle and bottom of the samples .what observations

would allow the chemist to reach the conclusion that the liquid could be a pure substance ?
Chemistry
1 answer:
Annette [7]3 years ago
5 0

Explanation:

The observation that can make the chemist conclude that the liquid is a pure substance is if the unknown liquid composition is the same at every point of sampling.

  • Pure substances are distinct substances.
  • They have a definite composition.
  • All the parts are the same throughout.
  • They cannot easily be separated or broken down into simpler substances by physical means.
  • They have a unique set of physical properties.

Therefore, if his analysis meets any of the criteria for defining a pure substance above, he can conclude that it is one.

Pure substances are elements and compounds.

Learn more:

Pure substances brainly.com/question/1832352

#learnwithBrainly

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A 45 kg box is sitting on a window ledge 2.0 m above the ground. What is the potential energy of the box?
Travka [436]

Answer:

<h3>The answer is 900 J</h3>

Explanation:

The potential energy of a body can be found by using the formula

PE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 10 m/s²

From the question we have

PE = 45 × 10 × 2

We have the final answer as

<h3>900 J</h3>

Hope this helps you

5 0
3 years ago
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Answer:

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A binary ionic compound is known to contain a cation with 51 protons and 48 electrons. The anion contains one-third the number o
7nadin3 [17]

Answer:

SbCl_3

Explanation:

The cation contains 51 protons and 48 electrons. The electrons are only lost not protons, so the element which corresponds to atomic number 51 is the cation which is Antimony (Sb).

Also, the charge on the cation is 51 - 48 = 3

This is because neutral atom contains the same number of electrons as protons.

Given the anion has one-third protons as cation which means thta:

Number of protons in anion = \frac {51}{3}=17

This corresponds to chlorine atom. The electrons are 1 greater than protons means that it has gain 1 electron.

So,

Sb     Cl

3         1

Cross multiply the valency.

So, formula is SbCl_3

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H E L P M E<br><br> complete the sentence
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An atom of sodium has atomic number 11 how many protons are there ?
adoni [48]
An atom of sodium has 11 protons

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