Calculate the molecular mass of the element

They give:H=1,AI=27,S=32,0=16,Cu=64,P=31,Mg=24,N=14,Na=23

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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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:

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:

Answer:

The answer is A

Explanation:

the order 5,1,3,4,2

Answer:

electrical forces between particles, as given by coulombs law.

Explanation:

Properties of a substance such as vapor pressure and surface tension depend on electrical forces between particles, as given by Coulomb's law.

The vapor pressure refers to how easily a liquid converts to gas while surface tension is the force that makes a liquid surface act as a stretched elastic skin.

Both vapor pressure and surface tension has a lot to do with the degree of polarity in a molecule. Usually, polar molecules have a low vapor pressure and high surface tension due to a high electrical forces between particles, as given by Coulomb's law.

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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

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Answer: 3-nitropyridine

Explanation:

Answer:

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

Explanation:

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.

Answer:

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

Answer:

This happens because a metal is less reactive than carbon and it can be extracted from its oxides by heating with carbon. The carbon displaces metal from the compound and removes the oxygen from the oxide.

    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:

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:

B  

Explanation:

Answer:

answers

B

Explanation:

Explicaciónexplicacaca

Actuating mechanism is the dry-chemical fixed application method which

introduces a concentration of agent into a closed area.

The actuating mechanism is commonly used in piping systems and

involves the transport of a control member in automatic or remote control

systems.

The closed system makes manual navigation very difficult which is why the

actuating mechanism in automatic systems are usually used to make it less

tedious and accurate.

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they don't have any relationship between them

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

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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:

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

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:

8 moles of Fe2O3

Explanation:

You can use the mole ratio give. For every 3 O2 you produce 2 Fe2O3. With this you can find the number of moles. 12 O2 multiplied by the ratio 2/3 gives you 8 moles

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:

20cm^2

Explanation:

Here, Density= Mass/ Volume

=100/5

= 20 cm^2

Explanation:

eggsus8d8ruttuririiryrey

Answer:

To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight

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:

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