Help please I promise this time I will mark whoever answers correctly first please​

Answer:

B  

Explanation:

Answer:

answers

B

Explanation:

Explicaciónexplicacaca

they don't have any relationship between them

Explanation:

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Answer:

The answer is A

Explanation:

the order 5,1,3,4,2

Answer:

Question 1: What material do you think can be a cheaper and better alternative to kerosene?

Answer: Generic lamp oil can be used to replace kerosene in lamps. The cheaper lamp oil burns cleaner and has less odor than the more expensive kerosene.

Question 2:

Correct answer is the last option

Hope this helps!

Answer:

First shell is lower

Explanation:

The electron has to absorb energy to excite and go to higher energy levels/ shells and should release energy to go to lower energy levels/ shells. This means higher the shell , more energy is required and vice versa

Answer is: the partial pressure of the hydrogen 500 mmHg.

p(total) = 523.8 mmHg.

p(water) = 23.8 mmHg.

p(total) = m(water) + p(hydrogen).

p(hydrogen) = p(total) - p(water)..

p(hydrogen) = 523.8 mmHg - 23.8 mmHg.

p(hydrogen) = 500 mmHg.

mmHg or millimeter of mercury is a manometric unit of pressure.

Answer: 17.7 feet, Its rounded up since the six repeats.

Answer:

In the presence of UV light, ethane will react with bromine in a substitution reaction. UV light is the condition under which the reaction will occur so it is written above the arrow in the chemical equation. As the reaction proceeds, the intensity of the re-brown colour of the bromine water decreases.

Answer:

here ya go

Explanation:

combining bromine and ethane leads to a brown gas or liquid which is made of the elements. it is a gas at room temperature and does not affect human beings. there are many uses for bromine compounds but they are mainly used for the manufacturing of chlorine, fire retadants, water purification, graphy chemicals and pharmaceutcals. it is a naturally occurring element that can be found in animals such as sharks since they produce their own.

Answer:

Atoms are the smallest particle that make up living both living and non living things, they are made up of subatomic particles; protons, neutrons and electrons. Of these the electrons protons and neutrons are in the nucleus and the protons electrons orbit around the nucleus. Of the subatomic particles, the electrons have the largest smallest mass and are negatively charged, the neutrons (negative charge) (no charge) and protons (positively charged) both have a relative mass of 1. Atoms contain an equal number of protons and neutrons electrons, so carry no overall charge. An element is a substance made up of only two one type of atom. Elements can be found in the Periodic table of elements, they usually have two numbers next to the chemical symbol, the larger number is generally the atomic mass number, which represents the number of neutrons and the number of protons. The smaller number is the relative atomic mass atomic number which represents the number of electrons or neutrons protons. In order to calculate the number of neutrons, you minus the atomic number from the relative atomic mass.

Answer:

Salt molecules block water molecules from packing together when temperature is lowered. It then prevents them from becoming ice. More water molecules leave the solid phase than the ones entering the solid phase. Freezing point depression occurs when the freezing point of the liquid is lowered by addition of solute.

Explanation:

Answer:When salt is dissolved in fresh water, the density of the water increases because the mass of the water increases.

Explanation:

The chemicals found at the crime scene although not mentioned must be Sodium zincate.

Discussion:

An interesting demonstration to show plating and alloys is the conversion of copper coins to silver look-alike coins.

A 'copper' coin when dipped into a solution of sodium zincate in contact with zinc. The coin is plated with zinc and appears silver in colour.

This is a common chemistry classroom trick.

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Answer: 3-nitropyridine

Explanation:

Answer:

The energy of atomic orbitals increases as the principal quantum number, n, increases. In any atom with two or more electrons, the repulsion between the electrons makes energies of subshells with different values of I differ so that the energy of the orbitals increases within a shell in the order s< p <d<f. Figure 1 depicts how these two trends in increasing energy relate. The 1s orbital at the bottom of the diagram is the orbital with electrons of lowest energy. The energy increases as we move up to the 2s and then 2p, 3s, and 3p orbitals, showing that the increasing n value has more influence on energy than the increasing I value for small atoms. However, this pattern does not hold for larger atoms. The 3d orbital is higher in energy than the 4s orbital. Such overlaps continue to occur frequently as we move up the chart.

Answer:

The electrons are most likely to be found in An orbital

Answer:

Acelera las reacciones químicas.

Se requieren en cantidades mínimas.

Son muy específicos en su acción.

Se ven afectados por la temperatura.

Se ven afectados por el pH.

Algunos catalizan reacciones reversibles.

Algunos requieren coenzimas.

Son inhibidos por inhibidores.

Explanation:

H2O is composed of two hydrogen atoms and one oxygen atom. The central oxygen atom is sp3 hybridized.

H2O is composed of two hydrogen atoms and one oxygen atom. The oxygen atom is bonded to the two hydrogen atoms at a dihedral angle of 104°. There are two lone pairs on the oxygen atom. The molecule has a bent geometry.

The structure of H2O is shown in the image attached to this answer. The central oxygen atom is sp3 hybridized and the shape of the molecule is based on a tetrahedron owing to its electron pair geometry.

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Answer:

159.6

Explanation:

Due to the law of conservation of mass, mass is neither created nor destroyed in a chemical reaction. Hence, the mass of the product is the equivalent of the mass of the sum of the reactants.

Answer:

A +1 Ion of Lithium

Explanation:

Lithium has the atomic number of 3, therefore it has 3 protons

An electron has a negative charge, so losing an electron gives an atom a positive charge.

Answer:

Positive 1 ion of lithium

Explanation:

hope this helps!

Answer:

ionic bond is the type of bond formed from electrostatic attraction between oppositely charged ion in a chemical compound

Answer:

capable of being hammered out thin, as certain metals; malleable.

Explanation:

Answer:

the water in the mountains will take longer to boil, because of the higher atmospheric pressu

Answer:

20cm^2

Explanation:

Here, Density= Mass/ Volume

=100/5

= 20 cm^2

Answer:

Ammonium chloride (a chemical compound) is an inorganic compound with the formula NH₄Cl and a white crystalline salt that is highly soluble in water. Solutions of ammonium chloride are mildly acidic. In its naturally occurring mineralogic form, it is known as sal ammoniac.

    This is not exactly a answer you can use but this is some information that you can use to find out the answer.

    You can usually confirm the charge associate degree particle unremarkably has by the element's position on the periodic table: The alkali metals (the IA elements) lose one negatron to create a ion with a 1+ charge. The alkaline-earth metal metals (IIA elements) lose 2 electrons to create a 2+ ion.

    Nonmetals type negative ions (anions). A range 7|chemical element|element|gas} atom should gain 3 electrons to possess an equivalent number of electrons as AN atom of the subsequent gas, neon. Thus, a gas atom can type AN ion with 3 additional electrons than protons and a charge of 3−.

Answer: DNA sequencing methods employ chain termination nucleotides. Furthermore, if two chain-terminating nucleotides are employed in the same well, determining which strand is ended by which dideoxynucleotide will be impossible.

(its my own words, but i did search it to get this answer, hope it helps!)

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Answer:

Ionic Compound

Explanation:

1) NaBr

2) CaCl2

3) MgS

4) AlO

5) Li3P

6) Cs3N

7) KI

8) BaF2

9) RbNO2

10) BaO

11) Potassium oxide

12) Magnesium iodide

13) Aluminum chloride

14) Calcium bromide

15) Sodium nitride

16) Lithium fluoride

17) Barium phosphide

18) Dicesium sulfide

19) Strontium fluoride

20) Sodium chloride

Hope this helps!!

Answer:

Unlike isopropanol, hydrogen peroxide is not a type of alcohol. You might recognize its chemical formula, H2O2, as being similar to that of water (H2O). The difference is that hydrogen peroxide has two oxygen atoms instead of one. That one extra oxygen atom makes it a strong oxidizer.