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3 years ago

What is the difference between an element and a compound?

Chemistry

2 answers:

dsp733 years ago

8 0

D. Would be the correct answer :)

sashaice [31]3 years ago

6 0

D.
im not completely sure but i did the process of elimination. it’s not B because an element is one type of atom. it’s not A because both elements and compounds are pure substances. and it’s not C because it’s not in mixed composition

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In the nucleus you will find most of the __________ of an atom.

SashulF [63]

D) protons and neutrons

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3 years ago

Read 2 more answers

Be sure to answer all parts. an aqueous solution of a strong base has a ph of 10. 220 at 25°c. calculate the concentration of th

tia_tia [17]

An aqueous solution of a strong base has a pH of 10. 220 at 25°C then concentration of the base if the base is

(a) LiOH = 1.66× $10^{-4}$ M

(b) $Ba(OH)_{2$ = 3.32× $10^{-4}$ M

Calculation ,

For calculation of concentration of the LiOH and $Ba(OH)_{2$ first we have to calculate pOH of the solution.

pH + pOH = 14

pOH = 14 - pOH = 14 - 10.22 = 3.78

pOH = -㏒ [ $OH^{-}$ ]

[ $OH^{-}$ ] = $10^{-pH}$ = $10^{-3.78}$ = 1.66× $10^{-4}$

So , concentration of the base LiOH = 1.66× $10^{-4}$

So , concentration of the base $Ba(OH)_{2$ = 1.66× $10^{-4}$ ×2 = 3.32× $10^{-4}$

To learn more about strong base please click here

brainly.com/question/16749233

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2 years ago

A chemical reaction needs to occur at a certain temperature, but one liquid is coming from a reactor at a much hotter temperatur

BlackZzzverrR [31]

The medium that might be used to cool the hot liquid coming from a reactor is : ( C ) Heat exchanger

<h3>Function of the heat exchanger</h3>

Heat exchanger is used for the transfer of heat between liquids to be used in a chemical reaction, It can be used for both Cooling and heating to achieve the desired temperature.

The liquid coming from a reactor which posses a very high temperature will be passed through the heat exchanger so that its temperature will attain the required temperature for the experiment.

Hence we can conclude that The medium that might be used to cool the hot liquid coming from a reactor is Heat exchanger.

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3 years ago

Need the answer please

WARRIOR [948]

I think A, I might be wrong though sorry

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3 years ago

It is widely known that fossil fuels pollute the environment and cause harmful effects. Why then are fossil fuels still being wi

stich3 [128]

Fossil fuels are still being widely used because of the fact that the demand for alternative fuels cannot be met by current manufacturers.