Why is the half-life of a radioisotope important for radioactive dating?
A. The half-life forms a type of clock used to calculate time passed.
B. The half-life of a radioisotope tells how long ago the element was
formed.
C. The age of an object is equal to the radioisotope with the longest
half-life in it.
D. The half-life gives the period over which the radioisotope doesn't
change.

Answer:

(1) It does not suffer from spectral interference, which occurs in flame emission spectroscopy.

(2) By atomic absorption technique, traces of one element can easily be determined in presence of high concentration of other elements.

The technique makes use of the atomic absorption spectrum of a sample in order to assess the concentration of specific analytes within it. It requires standards with known analyte content to establish the relation between the measured absorbance and the analyte concentration and relies therefore on the Beer–Lambert law.

Answer:

https://swartzbiotechnologylab.sites.stanford.edu/research

Explanation:

Alkyl chlorides and alkyl bromides are typically transformed into alkyl fluorides in the organic reaction known as the Swarts Reaction.

Frederick Jean Edmond Swarts first reported this procedure in 1892. Heating the alkyl chloride or alkyl bromide in the presence of heavy metal fluorides like AGF, Hg2F2, CoF2, or SbF3 causes this reaction.

Swartz process can be used to modify work for bacteria. Bacterial biofilms are collections of microorganisms where the cells are immersed in an extracellular polymeric matrix that the bacteria have self-produced.

In contrast to planktonic bacteria, which are in a state of free movement in a bulk solution, this situation is very different.

Applications:

Therefore, Alkyl chlorides and alkyl bromides are typically transformed into alkyl fluorides in the organic reaction known as the Swarts Reaction.

To learn more about the Swartz process, refer to the link:

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Answer:

8.76 ml³

Explanation:

volume = mass ÷ density

Answer:

density=mass/volume

=1.95/5 = 0.39 g(mL)-¹

Answer:

H

hydrogen have different properties

Reactants - The substance which participate in a chemical reaction are called reactants.

[tex] \rm \: Example - H_2 \: , \: O_2[/tex]

Product - The substance which are formed by chemical reaction between the reactants are called product.

[tex]\rm \: Example - H_2 O[/tex]

Explanation:

reactant is a substance that is present at

the start of a chemical reaction.

product is a substance

that is present at the end of a chemical

reaction.

Acrylonitrile and ethyl acetate will be collected together since they both have the same boiling point.

The method of distillation highly depends on the difference between the boiling points of the Acrylonitrile and ethyl acetate.

Since they have the same boiling point, the two substances turn into vapor at the same temperature and are collected simultaneously.

Hence separation is not achieved by distillation.

Learn more: https://brainly.com/question/15946045

Answer:

They would boil at the same rate. Basically meaning, that they would both be finished distilling at the same time.

Explanation:

This is what I put (this is for you to revise and it has not been graded yet DO NOT CHEAT with this answer just take in the info and revise it)

Answer:

A

Explanation:

hot to cold; jus took the quiz;)

Answer:

One cubic centimeter is equal to one milliliter. Cubic centimeter is used interchangeably with millimeter. Centimeter belongs in the CGS unit system (centimeter-gram-second system) while liter belongs in the SI (Système International d'Unités)  unit system. These two are equal.

Explanation:

Answer:

Viewed simply, electrons are arranged in shells around an atom's nucleus. Electrons closest to the nucleus will have the lowest energy. Electrons further away from the nucleus will have higher energy.

Answer:

Electrons are placed in the lower energy level first and when this is completely filled, we move on to the second energy level and so on. The way the electrons are arranged in an atom is called the atom's electronic structure or electronic configuration. The maximum number of electrons that the first shell can contain is 2.

Explanation:

The mass of CO₂ in grams without exponential notation and with the appropriate metric prefix is 31.6 Eg.  

First, let's calculate the amount of mass in grams of 31.6 billion metric tons.

Knowing that 1 metric ton is equal to 1000 kg, 31.6 billion metric tons is:

[tex]m = \frac{1000 kg}{1 \: metric \: ton}*\frac{1000 g}{1 kg}*31.6 \cdot 10^{12} \: metric \: ton = 3.16 \cdot 10^{19} g[/tex]              

The metric prefix that is close to the above result is exa (E), which is equal to 10¹⁸.

Therefore, the mass of CO₂ in grams without exponential notation and with the appropriate metric prefix is 31.6 Eg (exa-gram).  

To learn more about metric prefixes go here: https://brainly.com/question/20712978?referrer=searchResults

I hope it helps you!

Answer:

38.0644 cm^2

Explanation:

The names of ion are:

[tex]Selenate = SeO_4^{2-}\\Selenide = Se^{-2}\\Hydroselenide = HSe^-\\Hydrogenselenite = HSeO_3^-\\[/tex]

Explanation:

[tex]Sulfate = SO_4^{2-}\\Sulfite = SO_3^{2-}\\Sulfide = S^{-2}\\Hydrosulfide = HS^-\\Hydrogensulfite = HSO_3^-\\[/tex]

According to the question, selenium also forms compounds analogous to sulfur so the name of the given ions of selenium will be in analogy to that of the sulfur compound.

[tex]Selenate = SeO_4^{2-}\\Selenide = Se^{-2}\\Hydroselenide = HSe^-\\Hydrogenselenite = HSeO_3^-\\[/tex]

Learn more about sulfur and selenium here

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Answer:

Without new antibiotics, common infections and minor injuries could become life-threatening and major surgeries and chemotherapy impossible because the treatments we have been using for years are no longer effective.

Answer:

if you want to find average speed so u need to use this formula

Average speed = [tex]\frac{Total Displacement}{Total Time}[/tex]

Answer:

19.278049929737628457607385688801

Explanation:

Volume = L * W * H

Volume = 17.78 * 9.21 * 4.45 = 728.70441

Density = Mass / Volume

Mass = 14,048

14,048 / 728.70441 = 19.278049929737628457607385688801

Density = 19.278049929737628457607385688801

Explanation:

So density = mass/volume

Using this formula we'll solve the question.

mass = 14,048g/1000 = 14.048 kg

volume = 17.78/100 x 9.21/100 x 4.45/100

volume = 0.3143 m³

density = 14.048 kg/ 0.3143 m³

density = 44.69 kg/m³

round off to = 44.7 kg/m³

Answer:

Lidocain là cơ bản.

Tôi hy vọng câu trả lời của tôi là hữu ích cho bạn.

Explanation:

physicist Robert Boyle

Answer: Boyle

Explanation: Educere Answer

Answer:

I believe the answer your looking for is out of A or B

Explanation:

Option B because if the heat increases its essentially causing the concentration to increase by replacing the weak bonds with stronger ones

In increasing the temperature of a system that includes a reaction in the forward direction that is exothermic, the concentration rises as weak bonds are replaced by stronger ones.

The average kinetic energy of the atoms or molecules in a system is measured by temperature. No heat is transmitted between two objects in thermal equilibrium, according to the zeroth law of thermodynamics.

In conclusion, as the temperature of the system rises, the concentration rises as weak bonds are replaced by stronger ones.

Read more about Temperature

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Answer:

m=dxv

= 10.5 x 965 = 10132.5 rounded off to 10100 g

Explanation:

Answer:

Sulphuric acid is the on

Explanation:

think so

Answer:

Compazine belongs to a class of drugs called Antiemetic Agents; Antipsychotics, Phenothiazine.