How do you convert L to mL

Answers

Answer 1

Answer:

Answer:1 Liter (L) is equal to 1000 milliliters (mL). To convert liters to mL, multiply the liter value by 1000. For example, to convert 2 liters to mL, multiply 2 by 1000, that makes 2000 mL is 2 L.

Explanation:

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A covalent bond in which electrons are shared unequally isa. polar.
b. a double bond.
c. ionic.
d. polyatomic.

Answers

Covalentbonds = sharing of electrons between two atoms of the same elements or elementsclose to each other on the periodic table. Usually they are metals sometimesnon-metals. In polar bonds electrons areshared unequally. Non polar bonds share electrons equally.

Final answer:

A covalent bond where electrons are shared unequally is known as a polar bond. This unequal sharing occurs due to differences in electronegativity between the two atoms involved in the bond.

Explanation:

A covalent bond in which electrons are shared unequally is defined as a polar bond. This corresponds to option a) polar. This occurs because one atom is more electronegative and pulls the shared electron pair towards its nucleus making the bond polar, having a partial positive and partial negative end. Option b) a double bond, refers to a covalent bond where two pairs of electrons are shared between atoms. Option c) ionic refers to a bond where electrons are completely transferred from one atom to another and option d) polyatomic refers to a molecule that consists of more than two atoms.

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Which physical change is endothermic?(1) CO2(s)-->CO2(g) (3) CO2(g)-->CO2(l)
(2) CO2(l)-->CO2(s) (4) CO2(g)-->CO2(s)

Answers

Answer: The correct option is 1.

Explanation:Endothermic reactions are the reactions in which heat is provided to break down the reactant molecules.

In option 1:

The stronger intermolecular forces between the particles in solid molecule are broken down to convert into gaseous form. Hence, some energy in the form of heat is provided to move them far apart. Therefore, it is considered as an endothermic reaction.

In option 2, 3 and 4:

All the other processes involves the formation of bonds and thus there is no need to provide any energy.

The physical change that is endothermic is $\boxed{\left( 1 \right){\text{ C}}{{\text{O}}_{\text{2}}}\left( s \right) \to {\text{C}}{{\text{O}}_{\text{2}}}\left( g \right)}$ .

Further explanation:

Changes are of two types:

(A) Physical changes:

It is the process in which the physical properties of the system are affected. These changes can also be reversed by physical methods. In these kinds of changes, the molecular composition of the substance remains the same. These are reversible in nature and no new substances are formed. For example, boiling of water, chopping of wood, melting of wax are physical changes.

(B) Chemical changes:

In this change, new substances are formed by the chemical combination of the previous substances. The chemical properties of substance changes when it undergoes a chemical change. These are irreversible in nature. For example, fermentation of grapes, burning of wood, rusting of iron are chemical changes.

Endothermic reactions are those in which more energy needs to be supplied to the system than that released by it.

Exothermic reactions are those in which more energy is released by the system than that supplied to it.

(1) ${\text{C}}{{\text{O}}_{\text{2}}}\left( s \right) \to {\text{C}}{{\text{O}}_{\text{2}}}\left( g \right)$

In this reaction, solid carbon dioxide is converted into gaseous carbon dioxide. The strong intermolecular force of attraction in solid needs to be broken down and energy is supplied for this purpose. Hence this is an endothermic process.

(2) ${\text{C}}{{\text{O}}_{\text{2}}}\left( l \right) \to {\text{C}}{{\text{O}}_{\text{2}}}\left( s \right)$

In this reaction, liquid carbon dioxide is converted into solid carbon dioxide. The intermolecular forces in liquid molecules are weaker than that present in solid molecules and are broken down easily so energy is released during the process. Hence this is an exothermic process.

(3) ${\text{C}}{{\text{O}}_{\text{2}}}\left( g \right) \to {\text{C}}{{\text{O}}_{\text{2}}}\left( l \right)$

In this reaction, gaseous carbon dioxide is converted into liquid carbon dioxide. The intermolecular forces in gas molecules are weaker than that present in liquid molecules and are broken down easily so energy is released during the process. Hence this is an exothermic process.

(4) ${\text{C}}{{\text{O}}_{\text{2}}}\left( g \right) \to {\text{C}}{{\text{O}}_{\text{2}}}\left( s \right)$

In this reaction, gaseous carbon dioxide is converted into solid carbon dioxide. The intermolecular forces in gas molecules are weaker than that present in solid molecules and are broken down easily so energy is released during the process. Hence this is an exothermic process.

Learn more:

1. Which of these is an extensive property? brainly.com/question/1398514

2. Which of the phase changes is an exothermic change? brainly.com/question/1875234

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Physical and chemical changes

Keywords: physical change, chemical change, CO2, endothermic, exothermic, solid, liquid, gaseous, intermolecular forces, strong, weaker.

Exactly 1/16 of a given amount of protactinium-234 remains after 26.76 hours. What is the half life of protactinium-234?

Answers

This is a problem involving half-lives. We can solve this problem by using the equation as shown: A=Aoe^-(ln2/t)T where A is the final amount (1gram *assumed), Ao is the initial amount (16g *assumed), t is the half-life *required) and lastly T time elapsed (26.76h). Plug in the values in the equation and you should get 6.69 hours.

What was the main reason the Federalists wantedto replace the Articles of Confederation?
(1) The president did not have the power to veto
legislation.
(2) The legislative branch enacted an unfair tax
program.
(3) The Supreme Court refused to pay
Revolutionary War debts.
(4) The national government was too weak to
solve the nation’s problems.

Answers

Answer : Option 4) The national government was too weak tosolve the nation’s problems.

Explanation : The main reason for the Federalists wanted to replace the Articles of Confederation because they believed that the structure the Articles which were laid out did not provided enough power for the federal government to effectively solve the nation's problems. It projected the image of the federal government being weak for solving nation's problem.

The national government was too weak to solve the nation's problems.

The Articles of Confederation were only meant to be temporary, like a stand in, until a better document, eventually known as the constitution, could be created.

Carbon-14 has a half-life of 5715 years. If a 2.00g sample of Carbon-14 has decayed for 17145 years, how much of the sample remains?

Answers

The sample should have .25 g left. I did it and got the answer
N=0.25g

what are the three particles of an atom

Answers

They are protons, neutrons and electrons.

They are proton nuetrons and electrons

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