Complete the following equations by correctly matching the appropriate product.

Answers

Answer 1

Answer:

Answer: $_(82)^(206)\textrm {Pb}$

Explanation:

Alpha decay: In this process, alpha particles is emitted when a heavier nuclei decays into lighter nuclei. The alpha particle released has a charge of +2 units.

The general alpha decay reaction is given as:

$_Z^A\textrm{X}\rightarrow _(Z-2)^(A-4)\textrm{Y}+_2^4\alpha$

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

Thus the balanced reaction is :

$_(84)^(210)\textrm{Po}\rightarrow _(82)^(206)\textrm{Pb}+_2^4\alpha$

Answer 2

Answer: the first equation we are emitting an alpha particle so we take the top number and decrease it by 4 from 210 to 206 and the bottom number by 2 from 84 to 82. so that would match with Pb-206 (the 206 is the top number)

the second equation the 218 will drop to 214 and the 84 to 82 leaving us with Pb-214

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When dynamite explodes, it releases a large amount of light and heat. This is an example of _____.

slow combustion
rapid combustion
an exothermic reaction
an endothermic reaction
a chemical change
a physical change

Answers

Answer

Rapid Combustion

Explanation:

An explosion is a combustion and a quick reaction, That makes it rapid

Based on atomicity , how molecules are categorized

Answers

Answer:

On the basis of atomicity, molecules can be classified as : Monoatomic-composed of 1 atom e.g. He, Ne, Ar (all noble gases are monoatomic) Diatomic-composed of 2 atoms e.g. H2 , N2 , O. Triatomic-composed of 3 atoms e.g. O

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Which of the following is TRUE about ideal gas particles?A.They move in random directions.
B.They are very large.
C.They have high intermolecular forces.
D.They have inelastic collisions.
E.They always move in straight lines.

Answers

Answer:

The answer is A.

Explanation:

Gasparticlesdonothaveafixedpositionorvolumesotheymoveinrandomspeedanddirections.

(CorrectmeifIamwrong)

What SI unit would best be used to express the height of your classroom ceiling ?

Answers

Since height is a basic physical property of length, the height of a classroom ceiling is expressed in meters, or meters, or meters.

What is physical property of length?

There are some physical characteristics of matter, such as length, mass, volume, weight, and so forth, that are dependent on the amount or size of the substance.

As the size or amount of the matter changes, so do these qualities of matter and their values.

A quality of matter that is unrelated to a change in its chemical makeup is called a physical property.

Density, color, hardness, melting and boiling points, and electrical conductivity are a few common examples of physical qualities.

The physical characteristics include color, phase, odor, and boiling point. Reactivity with oxygen is not a physical quality because it depends on the chemical makeup of the thing.

Therefore, meter is used to express the height of your classroom ceiling.

Learn more about length here:

brainly.com/question/1319287

#SPJ2

Feet would be the best unit to use. Yards would work as well though.
Hope that helps!

Which is a pure substance?
soda
gasoline
salt water
carbon dioxide

Answers

Answer: Carbon dioxide is a pure substance.

Explanation: A pure substance is defined when a substance has a single type of molecule. If more than 1 type of molecule is present in a substance, then it is considered as a mixture.

Soda is basically a mixture of water and carbon dioxide. More than 1 type of molecule is present.

Gasoline is a mixture of may gases. More than 1 type of molecule is present.

Salt water contains salt and water molecules, hence it is considered as a mixture.

Carbon dioxide has only 1 type of molecule which is $CO_2$ molecules. Hence, it is a pure substance.

Answer:

Carbon dioxide

Explanation:

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products? a) The product is doubled. b) The product is half the mass of the reactants. c) The mass is the same. d) The mass changes depending on the reaction.

Answers

Answer:

c) The mass is the same

Explanation:

According to the Law of Conservation of Mass, the total mass of the reactants in a chemical reaction is always equal to the total mass of the products formed. This means that the total mass of the reactants and the total mass of the products will always be the same.