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3 years ago

Which of the following do water, rust, and salt have in common?

Chemistry

2 answers:

Cloud [144]3 years ago

6 0

The answer is "elements" :)

professor190 [17]3 years ago

3 0

<u>Answer:</u> The correct answer is Option D.

<u>Explanation:</u>

Atoms are defined as the smallest unit which cannot be further divided.

Mixtures are defined as the solution win which components are mixed in indefinite proportions. Every substance retain their individual chemical properties.

Elements are defined as the substances which are made from only one type of atoms. Example: Sodium (Na), Oxygen (O), etc...

Compounds are defined as the substances which are made from two or more than two types of atoms in a fixed ratio by their mass. For Example: $H_2O,CO_2$ etc..

We are given:

Three substances having chemical formulas of $H_2O,Fe_2O_3\text{ and }NaCl$

All the substances are made from two types of atoms. Thus, they are all considered as compounds.

Hence, the correct answer is Option D.

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your aunt tells you that she gets cold when the temperature falls below 60 degrees. does she mean Celsius or degrees Fahrenheit?

mestny [16]

Fahrenheit. 60 degrees celcius is 140 degrees fahrenheit, which is very hot.

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3 years ago

hat is the pressure of CO(g) in equilibrium with the CO2(g) and O2(g) in the atmosphere at 25 ????C? The partial pressure of O2(

Lubov Fominskaja [6]

Answer:

The partial pressure of CO is 5.54x10⁻⁴⁹atm. You shouldn't worry because it is very low pressure

Explanation:

First, the balanced reaction is:

CO + 1/2O₂ → CO₂

The energies of formation are:

ΔG(CO)=-137.168kJ/mol

ΔG(O₂)=0

ΔG(CO₂)=-394.359kJ/mol

The energy of the reaction is:

$delta-G_{reaction} =delta-G_{CO_{2} } -(delta-G_{CO} +1/2delta-G_{O_{2} } )\\delta-G_{reaction}=-394.359-(-137.168+0)=-257.191kJ/mol$

The expression for calculate the partial pressure of CO is:

$p_{CO} =\frac{p_{CO2} }{p_{O_{2} }^{1/2}*exp^{-\frac{delta-G}{RT} } } \\p_{CO}=\frac{3x10^{-4} }{0.2^{1/2}*exp(-\frac{-257.191*1000}{8.314*298} ) } \\p_{CO}=5.54x10^{-49} atm$

5 0

3 years ago

100 points! Report on an element

Luden [163]

Hydrogen H weight: 81

Non-metal

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period 1 group 1

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3 years ago

Read 2 more answers

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kifflom [539]

Answer:

law of conservation of mass

Explanation:

self explanatory

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3 years ago

What is the BEST definition for friction?

NARA [144]

Hello


                         its me

and alsooo

                                                         the awnser is

number 3 lol

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3 years ago