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3 years ago

What are the 6 branches of chemistry? With the definition and examples.

Chemistry

1 answer:

netineya [11]3 years ago

5 0

Answer:

Listed below

Explanation:

Analytical chemistry: using quality and quantity observations to identify and measure physical and chemical properties of substances.EXAMPLE: medical diagnosis

Physical chemistry: Combination of physics and chemistry. EXAMPLE:nitric acid eating through wood.

Organic chemistry: Studying of compounds containing carbon in them. EXAMPLE: there are different products that make use of this type of chemistry for example perfumes,gasoline and many more.

Inorganic chemistry: Studies materials without carbon i them. EXAMPLE: Metals AND Gases.

Biochemistry: studies chemical processes occurring in living organisms. EXAMPLE: Human bodies and muscles

Theoretical chemistry: provides explanations to chemical and physical observation. EXAMPLE: Concepts of chemical reactions

HOPE IT HELPED

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During the hot summer days, there is a lot more water in the air. This is due to which change of state?

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Answer:

The answer is B. Evaperation

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Container A holds 717 mL of an ideal gas at 2.80 atm. Container B holds 174 mL of a different ideal gas at 4.30 atm. Container A

horsena [70]

Answer:

3.09 atm

Explanation:

Given that:

Volume of container A = 717 mL

Pressure of container A = 2.80 atm

Volume of container B = 174 mL

Pressure of container B = 4.30 atm

Now, if the valve are being removed and the gases are allowed to mix together; then

The total final pressure can be calculated by using the formula:

$P_f = \dfrac{P_AVA+P_BV_B}{V_A+V_B}$

$P_f = \dfrac{2.80*717+4.30*174}{717+174}$

$P_f = \dfrac{2007.6+748.2}{891}$

$P_f = \dfrac{2755.8}{891}$

$\mathbf{P_f =3.09 \ atm}$

4 0

3 years ago

At 35°C, Kc = 1.6 multiplied by10-5 for the following reaction

Brums [2.3K]

Answer : The equilibrium concentrations of all species $NO,Cl_2\text{ and }NOCl$ are, 0.05 M, 0.043 M and 0.975 M respectively.

Explanation : Given,

Moles of $NO$ = 2 mole

Moles of $Cl_2$ = 1 mole

Volume of solution = 1 L

Initial concentration of $NO$ = 2 M

Initial concentration of $Cl_2$ = 1 M

The given balanced equilibrium reaction is,

$2NO(g)+Cl_2(g)\rightleftharpoons 2NOCl(g)$

Initial conc. 2 M 1 M 0

At eqm. conc. (2-2x) M (1-x) M (2x) M

The expression for equilibrium constant for this reaction will be,

$K_c=\frac{[NOCl]^2}{[NO]^2[Cl_2]}$

The $K_c$ for reverse reaction = $\frac{1}{1.6\times 10^{-5}}$

Now put all the given values in this expression, we get :

$\frac{1}{1.6\times 10^{-5}}=\frac{(2x)^2}{(2-2x)^2\times (1-x)}$

By solving the term 'x', we get :

x = 0.975

Thus, the concentrations of $NO,Cl_2\text{ and }NOCl$ at equilibrium are :

Concentration of $NO$ = (2-2x) M = (2 - 2 × 0.975) M = 0.05 M

Concentration of $Cl_2$ = (1-x) M = 1 - 0.975 = 0.043 M

Concentration of $NOCl$ = x M = 0.975 M

Therefore, the equilibrium concentrations of all species $NO,Cl_2\text{ and }NOCl$ are, 0.05 M, 0.043 M and 0.975 M respectively.

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3 years ago

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tatyana61 [14]

Pure metals possess few important physical and metallic properties, such as melting point, boiling point, density, specific gravity, high malleability, ductility, and heat and electrical conductivity. These properties can be modified and enhanced by alloying it with some other metal or nonmetal, according to the need.

Alloys are made to:

Enhance the hardness of a metal: An alloy is harder than its components. Pure metals are generally soft. The hardness of a metal can be enhanced by alloying it with another metal or nonmetal.

Lower the melting point: Pure metals have a high melting point. The melting point lowers when pure metals are alloyed with other metals or nonmetals. This makes the metals easily fusible. This property is utilized to make useful alloys called solders.

Enhance tensile strength: Alloy formation increases the tensile strength of the parent metal.

Enhance corrosion resistance: Alloys are more resistant to corrosion than pure metals. Metals in pure form are chemically reactive and can be easily corroded by the surrounding atmospheric gases and moisture. Alloying a metal increases the inertness of the metal, which, in turn, increases corrosion resistance.

Modify color: The color of pure metal can be modified by alloying it with other metals or nonmetals containing suitable color pigments.

Provide better castability: One of the most essential requirements of getting good castings is the expansion of the metal on solidification. Pure molten metals undergo contraction on solidification. Metals need to be alloyed to obtain good castings because alloys

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