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4 years ago

What is spectrophotometry? How can this be useful in identifying drugs?

Chemistry

1 answer:

liq [111]4 years ago

7 0

Answer:

What is spectrophotometry? It is an analytic method that it use substances light absorbance property

How can this be useful in identifying drugs? It possible compare spectra and identify problem substance

Explanation:

The way substances absorb light is unique and because of that it is possible to use spectrophotometry for substances identifying. the model spectra are measured in ideal conditions, so, it is difficult ensure the same conditions and to achieve identical spectra.

I hope I have been helpful

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If you examined the human body on a chemical composition basis, which of the following combinations of elements would be most co

Harlamova29_29 [7]

Answer:

Explanation:

<u>Roughly 96% of mass of human body is made up of four elements which are oxygen, carbon, nitrogen and hydrogen.</u>

Oxygen and hydrogen are predominantly found in the water, which makes up about 60% of body's weight. Carbon is synonymous with the life. The central role of carbon is due to fact that it has four bonding sites which allow for building of long and complex chains of the molecules. Moreover, these carbon bonds can be formed and also be broken with amount of energy which makes life alive. Nitrogen is found in organic molecules, including amino acids which make up the proteins, and nucleic acids which make up the DNA.

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4 years ago

Infectious agents vary in their size and shape. Which infectious agent tends to be the smallest?

Anika [276]

Answer:

prions

Explanation:

They are the smallest infectious agent.

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3 years ago

Acid mine drainage results from acidic water formed belowground that makes its way to the surface; the acidic water is formed as

Marizza181 [45]

Answer:

El drenaje ácido de la mina resulta del agua ácida formada bajo tierra que llega a la superficie; el agua ácida se forma como resultado de la inundación de minas abandonadas donde el agua subterránea reacciona con un tipo de roca, pirita, que libera iones de hierro e hidrógenob) reacciona con dióxido de azufre y dióxido de nitrógeno para formar ácidos sulfúrico y nítricoc) se descarga los productos químicos utilizados en la minería procesada) impregna una capa de piedra caliza que reduce el pHe) reacciona con cobre y aluminio para formar roca de pirita e iones de hidrógeno

Explanation:

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3 years ago

How many moles are in 89 grams of KCI

Pani-rosa [81]

Answer:

The number of moles in 89 grams of KCl is approximately 1.193 moles

Explanation:

A mole of an element or compound, is the quantity of the element or compound that contains 6.022 × 10²³ molecules of the element or compound, such that the molar mass of one mole is dependent on the mass of each molecule of the element or compound that make up the 6.022 × 10²³ particles

The given parameters are;

The mass of the KCl = 89 grams

The Molar mass, MW, of potassium, K = 39.1 g/mole

The Molar mass, MW, of chlorine, Cl = 35.5 g/mole

Therefore, given that KCl, has one K and one Cl, per mole, we have;

The Molar mass, MW, of potassium chloride, KCl = (39.1 + 35.5) g/mole = 74.6 g/mole

$The \ number \ of \ moles, n=\dfrac{Mass}{Molar \ mass, MW}$

Therefore, the number of moles of KCl in 89 g, 'n' is given as follows;

n = (89 g)/(74.6 g/mole) ≈ 1.193 moles

The number of moles in 89 grams of KCl, n ≈ 1.193 moles.

8 0

4 years ago

Read 2 more answers

How many grams of a 5.5% solution can be prepared from 25 kg KCl

AnnZ [28]

Answer:

The percentage concentration of any solution is most commonly expressed as mass percent:

Mass % of any component of the solution =

(Mass of the component in the solution / Total mass of the solution) x 100

Other methods are:

Volume percentage:

Volume % of a component =

(Volume of the component/Total volume of the solution) x 100

Mass by volume percentage:

It is the mass of solute dissolved in 100 mL of the solution.

i.e. Mass by Volume percentage =

(Mass of solute in grams/Volume of solution in mL) x 100

Here's a point to be kept in mind :

Whenever we say mass or volume of the solution, you need to add the respective masses and volumes of ALL the components of the solution. Do NOT commit the error of taking the mass or volume of only the solute or solvent in the denominators of the above expressions.

The concentration of a solution is most of the time expressed as the number of moles of solute present in 1 Liter of the solution (also called molarity )

(There are also other ways to express concentration. Please follow this link. )

EXAMPLE:

(a) If 25 moles of NaCl are present in 100 L of a solution wherein H2O is the solvent, then the concentration of the solution is

100

0.25

mol⋅L

−

(b) What is the molarity of a solution prepared by dissolving 15.0 g of sodium hydroxide in enough water to make a total of 225 mL of solution?

Solution

Calculate the number of moles of solute present.

Moles of NaOH = 15.0 g NaOH ×

mol NaOH

40.00

g NaOH

= 0.375 mol NaOH

Calculate the number of litres of solution present.

Volume = 225 mL ×

1000

= 0.225 L soln

Divide the number of moles of solute by the number of litres of solution.

Molarity =

0.375

mol

0.225

= 1.67 mol/L

Explanation:

7 0

4 years ago