PLSSSS HELP WILL GIVE BRAINLIEST!!!!!!!!!

Answer:

A) Hyrdrochloric Acid

Explanation:

This is because binary acids are molecular compounds in which hydrogen is combined with a non-metal element. Hydrochloric acid has hydrogen present in it's compound, therefore identifying it as the only binary acid amongst the answer choices.

Answer:

Boron B

Explanation:

According to the periodic table, Boron is the element with atomic mass of approximately 11 [i.e 10.81]

To calculate Neutrons

Neutrons = Mass number - Protons

Number of protons in Boron is same as atomic number which is 5

Thus, N = 11 - 5 = 6

Answer:

D- They use the exchange rate to convert one's Country's currency to another's

Explanation:

Answer:

their mobile electrons

Answer:

B

Explanation:

because mass of an electron is 1/2000.

The statement about the mass of an electron which is correct is: B. The mass of an electron is less than the mass of the proton.

An atom refers to a smallest, indivisible unit that comprises the matter that forms all chemical elements. Therefore, atoms are typically considered as the fundamental building blocks of matter which determines the structure of a chemical element.

Basically, an atom consists of three (3) distinct particles and these include;  

Electrons are the subatomic particles of a chemical element that are negatively charged with a magnitude of -1.

On the other hand, protons can be defined as the subatomic particles of a chemical element that are positively charged.

All of these subatomic particles of a chemical element has a mass. However, the mass of an electron is significantly less than the mass of proton, as a result of its extremely small size.

In conclusion, the mass of an electron is approximately 2000 times smaller than that of a proton and as such contributes almost nothing to the total mass of an atom.

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Answer: c. Shared equally between two atoms

Electrons are shared equally because the atoms have the same electronegativity.

Answer:

b. A hydrogen sulfide molecule has lone pairs of electrons

Explanation:

The presence of lone pairs indictates that the molecule will be polar unless its molecular geometry is linear or square planar. In the case of H2S, its shape is bent due to the lone pair and it is a slightly polar molecule.

Answer:

someone already answered but i think it's 132.0 mol too

Answer:

4.76 mol / L

Explanation:

The process that takes place is:

Assuming we have 1 L of the solution, we would have 2.38 moles of Sc₂(C₂O₄)₃.

We then convert 2.38 moles of Sc₂(C₂O₄)₃ into moles of Sc⁺³, using the stoichiometric coefficients:

Finally we calculate the concentration of scandium ion (Sc⁺³) in mol/L:

Answer:

CHCl₃

Explanation:

We have the following data:

C = 5.03 g

H = 0.42 g

Cl= 44.5 g

First, we divide each mass by the molar mass (MM) of the chemical element to calculate the moles:

MM(C) = 12 g/mol

moles of C = mass/MM(C) = 5.03 g/(12 g/mol) = 0.42 mol C

MM(H) = 1 g/mol

moles of H = mass/MM(H) = 0.42 g/(1 g/mol) = 0.42 mol H

MM(Cl) = 35.4 g/mol

moles of Cl = mass/MM(Cl) = 44.5 g/(35.4 g/mol) = 1.26 mol Cl

Now, we divide the moles by the smallest number of moles (0.42):

0.42 mol C/0.42 = 1 C

0.42 mol H/0.42 = 1 H

1.26 mol Cl/0.42 = 3 Cl

Thus, the C:H:Cl ratio is 1:1:3.

Therefore, the empirical formula is CHCl₃

Answer:

CHCl₃

Explanation:

Answer:

an epicenter is where an earthquake first hit

Answer:

The epicenter

Explanation:

The location below the earth's surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter. ... These are smaller earthquakes that occur afterwards in the same place as the mainshock.

Answer:

hi!

Explanation:

Well, some things I would do is to know the Periodic Table font and back. Know they elements and their class and atomic number and weight. Know how many atoms make up each element and how many protons, neutrons, and elements are in each atom.

Answer:

The change in concentration of H+ ions is -9.99×10⁻⁵

Explanation:

When pH rises, we talk about neutralization and, there is a decline in proton's concentration.

pH lower than 7 is acid

pH higher than 7 is basic

Protons are neutralized by hydroxides to make water as this:

H₃O⁺   +  OH⁻  ⇄   H₂O

pH = - log [H₃O⁺]

[H₃O⁺] = 10^-pH

In conclussion: [H₃O⁺]₁ = 10⁻⁴ → 1×10⁻⁴

[H₃O⁺]₂ = 10⁻⁷ → 1×10⁻⁷

1×10⁻⁷- 1×10⁻⁴

The change in concentration of H+ ions is -9.99×10⁻⁵

Answer:

Explanation:

Freezing point depression is the phenomena that describes why adding a solute to a solvent results in the lowering of the freezing point of the solvent.  Adding solute to a solvent will essentially dilute the solvent molecules

Answer:

The freezing point decreases

potassium reacts the most vigorously.

Answer:

C. a change in the total mass of the product

Explanation:

A chemical reaction is a reaction that alters the chemical composition of the substances involved. Based on the options in this question, a chemical reaction possess the following features:

- The atoms of the substance called reactants are rearranged into products but the total number of atoms remain the same after the reaction.

- A change in odor occurs as one of the indicators that a chemical reaction has taken place.

- Energy is either absorbed (endothermic) or released (exothermic) in the chemical reaction.

However, one untrue option is that "there is a change in the total mass of the product". The total mass of a chemical reaction does not change i.e. remains the same, before or after the reaction in accordance to the law of conservation of mass.

Answer:

B. A+ B → AB

Explanation:

general form of a synthesis reaction

Answer:

Explanation:

A natural disaster is a major adverse event resulting from natural processes of the Earth; examples include floods, hurricanes, tornadoes, volcanic eruptions, earthquakes, tsunamis, storms, and other geologic processes

Answer:

A natural disaster is a natural, major harmful event resulting from natural processes of the Earth such as floods, earthquakes, or hurricanes, tornadoes, volcanic eruptions, tsunamis, storms, and other geologic processes that causes great damage or loss of life.

Answer:

To extract its derivatives without impurities

Answer:

B)NaOH(s)

Explanation:

Answer:

ΔH = 283kJ/mol

Explanation:

Using Hess's law, the ΔH of a reaction is equal to the sum of ΔH° of products times its coefficient subtracting the sum of ΔH° of reactants times its coefficient. Replacing, for the reaction:

ΔH = 2ΔH°C + 2ΔH°D - (2ΔH°A+ΔH°B)

ΔH = 2*193kJ/mol + 2*-493kJ/mol - (2*-235kJ/mol+ (-413kJ/mol)

yeah it's NaCl, I just looked it up

Answer:

Yes

Explanation:

NaCl is table salt

Also known as sodium chloride

Answer:

Explanation:

Answer:

The correct row is B.

Explanation:

The formation of the magnesium ion, Mg²⁺, comes from the removal of 2 electrons from the valence shell of the magnesium atom. Since the remotion is of electrons, the nucleus of the atom remains the same, so the number of protons and the number of neutrons does not change.

If the number of proton change, then the atom also change, since the identity of an atom is related to the atomic number which is the same to the proton number.          

Now, if the number of neutrons changes, then we would be in the presence of an isotope of the magnesium atom.        

Therefore, the correct row is B.  

I hope it helps you!                            

Answer:

Lithium perchlorate

Explanation:

The compound formed from lithium chloride and oxygen is lithium oxide (Li₂O).

When lithium chloride (LiCl) reacts with oxygen (O₂), they combine to form lithium oxide (Li₂O). In this reaction, each lithium-ion (Li⁺) from lithium chloride combines with an oxygen atom (O) from oxygen gas to form a lithium oxide molecule.

The chemical formula Li₂O indicates that two lithium ions are combined with one oxygen atom in the compound. This is because lithium has a +1 charge, and since there are two lithium ions, their combined charge is +2. Oxygen, on the other hand, has a -2 charge, so one oxygen atom is sufficient to balance the charges and form a neutral compound.

Hence, the name of the compound formed is Li₂O

Learn more about compounds here:

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#SPJ 2

Answer:

d but I may be wrong

Explanation:

Answer: C. The electrode where reduction occurs.

Answer:

nsksbsjensnsjeiejensbsksks

Answer:

A book held high over a desk

Explanation:

Gravitational potential energy, or GPE, is like height energy. The higher up an object is placed, the more GPE it has. Gravitational potential energy is the potential of a certain mass relative to another due to gravity. In this case you have a book held high over a desk and therefore since it's higher up it's going to have more potential energy due to gravity, which is why it has gravitational potential energy. Therefore your answer is "a book held high over a desk".

Answer:

It is an ionic compound that consists of one calcium cation Ca2+ and two chlorine anions. The bivalent calcium metal forms an ionic bond with two chlorine atoms. The formation of cacl2 happens mainly by reacting limestone (CaCo3) with hydrochloric acid (HCl).