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Answer:

HI

H₂O

H₃O⁺

I⁻

Explanation:

Bronsted-Lowry acids are chemicals that can donate protons, and Bronsted-Lowry bases are chemicals that can accept them. Conjugate bases and acids are the resulting effect of losing or gaining a proton in the form of H⁺.

Answer: A planet from a rain forest would not survive in a desert home, for the fact they depend on water and as these live from water, without it, this leads to dehydration and with loss of water with plants, nothing is able to survive when it comes to a rain forest plant being in a desert home. Another reason is the high trees and leaves that are providing the plants enough sunlight or shade to grow, it guarantees to help keep the temperature normal. Being in a deserted area would mean that there would be a temperature change, something the plant is not used to. Without that needed shade and avoiding the scorching sun, they will die out from how different the temperature is, and how hot it is.

Explanation: I hope this helped you.

okay, the answer should be simple and easy, plants from a rainforest would not survive in a desert because the plants in the rainforest do get water, sunlight and air whereas the plants in the desert have Sunlight which is very hot. so if a plant in the rainforest was transferred to the desert it will hard to survive and it will eventually die because they will not get water that will be needed and the plant can get sunburns with the too hot temperature.

Answer:

6 that will be the answer

Answer:

Aluminum oxide (Al₂O₃)

Explanation:

The standard heat (or enthalpy) of formation of a compound, is the amount of change in the enthalpy that takes place when 1 mole of the compound is produced from the elements it contains whereby the compounds and elements in the reaction are in their standard states

The standard state of an element, is the state in which the element is in the most stable form at a pressure of 1 bar

Therefore, the heat of formation of hydrogen, H₂, oxygen, O₂, and potassium, (K), will have a heat of formation of zero, while Al₂O₃ which is made of aluminum and oxygen in combining to form a compound in proportions which are different from their initial standard states will have a heat of formation not equal to zero

Answer:

[tex]V_{CuCl_2 }= 43.6mL[/tex]

Explanation:

Hello there!

In this case, according to this titration problem, it is possible to note there is a 1:3 mole ratio of CuFeS2 to CuCl2; it means that we can use the following equation:

[tex]3*n_{CuFeS_2}=n_{CuCl_2 }[/tex]

Thus, by introducing the mass and molar mass of the former and the volume and concentration of the latter, we write:

[tex]3*0.20gCuFeS_2*\frac{1mol}{183.51g} =V_{CuCl_2 }*0.075\frac{mol}{L} \\\\V_{CuCl_2 }=\frac{0.00327mol}{0.075mol/L}*\frac{1000mL}{1L} \\\\V_{CuCl_2 }= 43.6mL[/tex]

Regards!

Answer:

false

Explanation:

Inertia is the resistance of any physical object to any change in its velocity, so it can't move by itself. Only by a different entity.

Answer: False

Explanation: In order to understand this, you need to understand what inertia means. In short, inertia is a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.

Answer:

See Explanation

Explanation:

In discussing the reason why Et₃SiCl is more easily hydrolysed than Et₃CCl, we must remember that the electronegativity difference between silicon and chlorine is much higher than the electronegativity difference between carbon and chlorine.

As a result of this, the Si-Cl bond in Et₃SiCl is more polar and hence susceptible to attack by water than the C-Cl bond in Et₃CCl.

Also, it is postulated that the presence of vacant d orbitals on silicon assists hydrolysis in Et₃SiCl. Such vacant orbitals are absent in carbon hence Et₃CCl does not undergo hydrolysis.

The reaction scheme is shown in the image attached to this answer.

Answer:

The bond formed between 2 or more elements by sharing of electrons is called covalent bond

Answer:

A solution with a pOH of 4.3 has a [H+] of 2*10⁻¹⁰ M.

Explanation:

The pOH (or potential OH) is a measure of the basicity or alkalinity of a solution.

pOH indicates the concentration of hydroxyl ions [OH-] present in a solution. It is defined as the negative logarithm of the activity of hydroxide ions. That is, the concentration of OH- ions:

pOH= -log [OH-]

On the other hand, pH is also a measure of the basicity or alkalinity of a solution. POH is an indicator that is related to pH by:

pOH + pH= 14

So, if the solution has a pOH equal to 4.3, the pH is calculated by:

4.3 + pH= 14

pH= 14 - 4.3

pH= 9.7

The pH is defined as the logarithm of the concentration of H+ ions, with the sign changed:

pH= -log [H+]

So, in this case:

9.7= - log[H+]

Solving

[H+]= 2*10⁻¹⁰ M

A solution with a pOH of 4.3 has a [H+] of 2*10⁻¹⁰ M.

Answer:

4, 3, 1, 12

It balances now

Answer:

pH = 14

Explanation:

pOH = -log[OH-] = -log1,0 = 0

pH + pOH = 14

pH = 14 - pOH = 14 - 0 = 14

Answer:

Explanation:

hope it helps

Answer:

this is your answer.....

Answer:

the answer is 4=Be 9 =F 16=S 17 = CL

Explanation:

atomic no 4 = beryllium (Be)

" " 9 = fluorine (F)

16 = sulfur (S)

17 = chlorine (CL)

The atomic number of Beryllium is 4, the atomic number of fluorine is 9,  atomic number of sulfur is 16 and the atomic number of chlorine is 17.

The atomic number is defined as the number of protons in the nucleus of an atom or the number of electrons revolving around the nucleus in orbits or shell.

So we can conclude that he atomic number of Beryllium is 4, the atomic number of fluorine is 9,  atomic number of sulfur is 16 and the atomic number of chlorine is 17.

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Answer:

5.1 x 10^-3 M

Explanation:

Find number of moles of KOH used

.050 M /L  * .017 L = .00085 moles of KOH

  from the reaction equation, this will react with 1/2 as many moles of Ca 2+

     or   .000425 moles of Ca    <===== in .084 Liter of water

.000425 moles / .084 liter  = .00505 M   =~ 5.1 x 10^-3 M

Answer:

See Explanation

Explanation:

Evaporation is an endothermic process, an endothermic process is one in which energy is absorbed from the surrounding thereby making the system to be at a lower temperature compared to the environment.

Being an exothermic process, molecules take away energy from the liquid surface as they escape from the liquid surface hence, evaporation causes the temperature of the water to be decreased below room temperature.

The rate of evaporation and cooling depends on the surface area of liquid. The liquid in the wide and shallow container has a greater rate of cooling because it has a greater surface area than the liquid in the narrow and deep container.

Answer:

Exothermic reaction

Explanation:

An exothermic process releases heat, causing the temperature of the immediate surroundings to rise

The potential energy diagram for a reaction starts at 180 kJ and ends at 300 kJ. the type of reaction does the diagram best represent exothermic reaction.

An exothermic reaction would be one in which heat energy is emitted. Exo stands for "evolve out." The term "thermos" refers to a container that holds heat. The term "exothermic" refers to a process in which heat is produced. In general, an exothermic reaction is one in which heat is released as a byproduct.

Therefore, the reaction diagram will represent exothermic reaction.

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This statement is true.

Answer:

true

Explanation:

because solids have strong intermolecular force of attraction so they have definite shape and volume and cannot flow

Coal is extracted by mining.

Once coal has been extracted, it can be used directly  for heating and industrial processes or to fuel power plants for electricity.

Benefits are:

Coal energy is an affordable energy source because of the coal's stable price compared to other fuel sources.

Coal is easy to burn.

Coal produces high energy upon combustion.

Coal energy is inexpensive.

Answer:

the major difference between electricity and magnetism is it presence of magnetism and electricity give you present in a static charge of magnetism president is only felt when they are moving charge as a result of electricity

Explanation:

The location of fossils in rock layers provides evidence of Earth's past landscapes. ... Scientists use a technique called radiocarbon dating to find out the age of the fossils. Once they know the age of the fossil in the rock, they also know that rock itself is about the same age!

Answer:

20 x (6.022 x 10^23) atoms in 20 moles of Calcium.

Explanation:

A mole contains 6.022 x 10^23 atoms, which is also known as Avogadro's number, and this number is same for each element. So, there are 20 x (6.022 x 10^23) atoms in 20 moles of Calcium.

The number of atoms are there in 20 moles of calcium is 120.4 × 10²³.

Avogadro's number is the number which is equal to the number of atoms of any substance that are present in one mole of that substance, and it is equal to 6.022 × 10²³.

Given moles of calcium = 20 moles

So, number of atoms in given moles of calcium will be calculated as:
No. of Ca in 20 mol = 20mol × 6.022 × 10²³ atoms/mol = 120.4 × 10²³ atoms

Hence required atoms of calcium is 120.4 × 10²³.

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Answer:

k = [F2]² [PO]² / [P2] [F2O]²

Explanation:

In a chemical equilibrium, the equilibrium constant expression is written as the ratio between the molar concentration of the products over the molar concentration of the reactants. Each species powered to its reaction coefficient. For the equilibrium:

P2(g) + 2F2O(g) ⇄ 2PO(g) + 2F2(g)

The equilibrium constant, k, is:

k = [F2]² [PO]² / [P2] [F2O]²

Answer:

Option 1

Explanation:

p can hold upto 6 e-.

It would be easy if it gains 2e-, instead of losing 4e-, to be stable.

It gains 2e, and gets a charge of - 2e.

It forms O (2-)

Answer:

107 g

Explanation:

need to divide by avogadro’s number

The mass of a substance is a weight that can be given by the moles. In the sample 107.27 gms of ammonia is present. Thus, option D is correct.

Mass or the weight of the substance can be given by the molar mass and the moles of the substance.

We know,

6.02214076 × 10²³ molecules = 1 mole of NH₃

So, 3.80 x 10²⁴ molecules = 6.31 moles

If 1 mole = 17 gm ammonia

Then, 6.31 moles = 6.31 × 17 = 107 gms

Therefore, option D. 107 gms is the mass of ammonia.

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Explanation:

the tip of a growing plant contains special rapidly diving cells called apical meristem ,these cells are responsible for increase in the length of the plant . if we cut out these cells ,length growth of the plant will be stunned as these cells are not present anyplace else.