based on their lewis dot diagram, which of the following elements is a metal

Answer:

None of the above!

Explanation:

Answer:

1) Measure initial masses of the crucible and cover with and without the hydrate.

2) Use a Bunsen burner to heat and dry the hydrate, repeating until the mass no longer decreases.

3) Measure the final masses of the crucible, cover, and anhydrous salt.

4) Compute differences in masses to find the reactants and products.

5) Use stoichiometry to convert these masses to moles.

6) Use the numbers of moles to compute the mole ratio.

7) Use the mole ratio to write the hydrate’s formula.

Explanation:

A hydrate is any substance that contains water of crystallization. The water of crystallization constitutes part of the mass of the substance. When heated to constant mass, the substance looses its water of crystallization and becomes anhydrous.

The mass of the anhydrous substance is now obtained by weighing again  and subtracted from that of the hydrated substance. The masses are converted to moles using stoichiometry  and the moles are then used to obtain the formula of the hydrate.

Answer: answers in order from top to bottom

2

3

4

1

6

5

7

Explanation: right on edg

The concentration of hydrogen ion of a sample of vinegar : 1.514 x 10⁻⁷

pH is the degree of acidity of a solution that depends on the concentration of H⁺ ions. The greater the value the more acidic the solution and the smaller the pH.

So that the two quantities between pH and [H⁺] are inversely proportional because they are associated with negative values.

A solution whose value is different by n has a difference in the concentration of H⁺ ion of 10ⁿ.

pH = - log [H⁺]

pH of a sample vinegar = 6.82

The concentration of hydrogen ion :

[tex]\tt 6.82=-log[H^+]\\\\(H^+]=10^{-6.82}=1.514\times 10^{-7}[/tex]

Answer:299,800,000

Explain: The speed of light is 3.00x108m/s and in mph is 6.708 x 108.

Answer:

0.5kg

Explanation:

Given parameters:

Speed of the object  = 12m/s

Kinetic energy  = 36J

Unknown:

Mass of the object  = ?

Solution:

Kinetic energy is the energy due to the motion of a body. It is mathematically expressed as;

     K.E = [tex]\frac{1}{2}[/tex] m v²  

 Insert the parameters and solve;

    36  =  [tex]\frac{1}{2}[/tex] x m x 12²

     36  = 72m

       m  = 0.5kg

He will arrive at the second city on time

Using the formula for calculating speed expressed as:

Distance = Speed * time

Given the following parameters

Speed = 65km/hr

Time = 3 hours (from noon to 3PM)

Get the distance covered by Isaiah;

Distance = 65 * 3

Distance = 195km > 186km

Since the distance covered by Isaiah is greater than the distance from one city to another city, hence he will arrive at the second city on time

What is Speed?

The speed at which an object's location changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined. Since speed simply has a direction and no magnitude, it is a scalar quantity.

Therefore,

186km at 3:00 the speed limit is 65km/h

He will arrive at the second city on time

Using the formula for calculating speed expressed as:

Distance = Speed * time

Given the following parameters

Speed = 65km/hr

Time = 3 hours (from noon to 3PM)

Get the distance covered by Isaiah;

Distance = 65 * 3

Distance = 195km > 186km

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The number of hydrogen atoms in a 90.0g sample of camphor C₁₀H₁₆O is 5.68 X 10²⁴.

The mass of 1 mole of a chemical is indicated by its molar mass. It provides you with the amount of grams per mole of a substance, to put it another way.

Given,

Mass of sample of camphor (C₁₀H₁₆O), m = 90.0g

To find: No. of hydrogen atom in given sample.

Molecular mass of camphor is:

M = 152 g/mol

Moles of camphor,

n = m/M

n = 90/152 = 0.59

1 mole of camphor contains 16 moles of Hydrogen

so, 0.59 moles of camphor contains 9.44 moles of hydrogen

1 mole of any substance contain 6.022 X 10²³ no. of atoms/molecule

So, no. of atoms in 9.44 moles of hydrogen is

N = 6.022 X 10²³ X 9.44

N = 56.84 X  10²³

N = 5.68 X 10²⁴

Hence, The number of hydrogen atoms in a 90.0g sample of camphor C₁₀H₁₆O is 5.68 X 10²⁴.

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Answer:

Compare your two units. The two units must measure the same thing.

For example, in the problem "convert 2 inches into centimeters," both inches and centimeters measure length. If your units measure two different things (like length and weight), you can't convert between them.

or

Look up the conversion. Before you can do the math, you need to know how much larger one unit is than the other.If the conversion you find has many decimal places, round to the nearest significant digit. If you don't know what a significant digit is, round to the second or third digit.

For example, if you need to convert 2 inches to centimeters, you need to know that 1 inch = 2.54 centimeters.

Explanation:

Hope this will help

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Answer: it will increase the strong nuclear force in the nucleus

Explanation: Labster

Answer : It will increase the strong nuclear force in the nucleus ( C )

Given that the strong nuclear force affects the particles that are close to each other addition of two neutrons and two protons, will cause an increase in the strong nuclear force found in the nucleus . this is because a Nucleus with two ( 2 ) protons exhibits attractive nuclear force and a repulsive coulomb force. and since the nuclear force does not depend on the charge, the addition of two neutrons the attractive nuclear force will increase

Hence we can conclude that addition of two neutrons to our nucleus with two protons will increase the strong nuclear force in the nucleus.

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Answer:

The interference is 8

Explanation:

This article aims to find that [tex]Ca^{2+}[/tex] occupancy of a site on the extracellular side of the CRAC channel ordinarily potentiates its [tex]Ca^{2+}[/tex] as well as [tex]Na^{+}[/tex] currents, and [tex]Ca^{2+}[/tex] dissociation from this site is responsible for the inactivation of its [tex]Na^{+}[/tex] current.

The most extensively studied of the store-operated ion channels, which are widely expressed and crucial to many vital biological processes, is the [tex]Ca^{2+}[/tex]  release-activated [tex]Ca^{2+}[/tex] (CRAC) channel. But little is known about the CRAC channel's molecular makeup or how intracellular or extracellular messengers control it.

It becomes more permeable to monovalent cations with a higher current when extracellular divalent cations are absent, however this monovalent cation current quickly deactivates due to an unidentified mechanism.

Here, it was found that [tex]Ca^{2+}[/tex] occupancy of a site on the extracellular side of the CRAC channel ordinarily potentiates both its [tex]Ca^{2+}[/tex] and [tex]Na^{+}[/tex] currents. [tex]Ca^{2+}[/tex] dissociation from this site, however, results in the inactivation of the channel's [tex]Na^{+}[/tex] current. This [tex]Ca^{2+}[/tex]-dependent potentiation is required for the normal functioning of CRAC channels.

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Answer: 200000 J

Explanation:

Formula for kinetic energy: Ek=1/2 *mv^2

m=1000 kg. v=20.0m/s

Ek=1/2 *1000*20^2

Ek=500*400

Ek=200000 J

J=joules

Answer:the answer is c , location Y

The location at which the marble have maximum kinetic energy is location Y.

Conservation of energy states that total energy of the system doen not change else the one form of energy is converted into another form within the system.

In the given diagram it is mention that potential energy of marble is highest at the location W as potential energy is directly proportional to the height. But when the marble rolls down it attains the kinetic energy and potential energy decreases.

According to the law of conservation at point Y potential energy is minimum, so that kinetic energy becomes maximum at this point.

Hence at location Y marble have maximum kinetic energy.

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Answer: The middle hydrogen is surrounded by 4 electrons, the middle hydrogen is bonded to 2 elements, and there are too many electrons in the final structure are correct.

Explanation: I just did this question and got the correct answers.

The incomplete points about the structure H—H-O: is that the middle hydrogen is surrounded by 4 electrons, the middle hydrogen is bonded to 2 elements, and there are too many electrons in the final structure are correct.

For better understanding let's explain the Lewis structure

From the above we can therefore say that the answer The incomplete points about the structure H—H-O: is that the middle hydrogen is surrounded by 4 electrons, the middle hydrogen is bonded to 2 elements, and there are too many electrons in the final structure, is correct.

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Answer: number of electron in respective sub shell or orbital

Explanation:

In an electron configuration, the superscripts (written as numbers above the orbital symbols) represent the number of electrons present in each orbital. They indicate the distribution of electrons among different energy levels and sublevels within an atom.

Superscripts are characters or numbers that are positioned slightly above the normal line of text. They are typically smaller in size and are used to indicate various types of information or formatting in written text.

The superscripts are determined based on the rules of filling electron orbitals, such as the Pauli exclusion principle and Hund's rule. These rules govern the arrangement of electrons in the orbitals according to their energy levels and sublevels.

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Answer:

The thermal energy of an object is the energy contained in the motion and vibration of its molecules. Thermal energy is measured through temperature.

Answer:

A noble gas, reactive

Explanation:
I'm just too based

Answer:

Nonmetal

Explanation:

A substance in the chart is a nonmetal because nonmetals are not water soluble, they are poor conductors of heat and electricity and they do not have high melting points like metals.

Answer:

the answer is the last option yzxw

Explanation:

ph is stronger the lower

Answer:

D: Y → Z → X → W

Explanation:

on edge2021! hope this helps!!~ ー( ´ ▽ ` )ﾉ

Answer:

Cobalt lose 3 electrons and donate 12 electrons.

Explanation:

In the periodic table,cobalt has nine electrons .It has lost 3 electrons,so it is only six left.Once it forms the complex,each ammonia donates a pair of electrons.

The activity series of metals reflect the stability of metals are "the metals highest on the list are the least stable."

The organization of metals in a declining sequence of respective reactivities is referred to as the "activity series," also described as the "reactivity series" of metals.

Materials having the qualities of being bright, hard, fusible, malleable, ductile, etc. were known as metals.

The activity series of metals reflect the stability of metals are "the metals highest on the list are the least stable."

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Answer: The intermolecular forces increase with increasing polarization of bonds. Boiling point increases with molecular weight, and with surface area. The three major types of intermolecular interactions are dipole–dipole interactions, London dispersion forces (these two are often referred to collectively as van der Waals forces), and hydrogen bonds. Intermolecular forces are much weaker than the intramolecular forces of attraction but are important because they determine the physical properties of molecules like their boiling point, melting point, density, and enthalpies of fusion and vaporization.In order from strongest to weakest, the intermolecular forces given in the answer choices are: ion-dipole, hydrogen bonding, dipole-dipole, and Van der Waals forces. Ionic bonding is stronger than any of the given intermolecular forces, but is itself NOT an intermolecular force.

Hope this helps.. Stay safe and have a Merry Christmas!!!!!!!!!! :D

Answer:

A

Explanation:

edge 2020

Answer:

Explanation:

a)

Average speed is total distance over change in time.

So

total distance=(200+150)

=350

total time=(3+0.5+1.5)

=5

350 km/5 hours

70km/hour

Therefore:

70 km/h is the average speed

b)

total distance=(200+150)

=350

total time=(3+1.5)

=4.5

350/4.5

=approx. 77.77 km/hour

Therefore:

77.77/hour is the average speed

Don't know if you round but uh yeah

Answer:]

Conduction is the transfer of energy from one molecule to another by direct contact. This transfer occurs when molecules hit against each other, similar to a game of pool where one moving ball strikes another, causing the second to move.

Explanation:

Answer:

A-bone cell, bone cell C-bone tissue, bone cell bone tissue, femur, skeleton, dog B-dog.

Explanation:

It is ordered from the smallest unit (tissue microstructure) to a tissue or organ that are considered macrotisular structures.

Answer:

dioxide hexachloride

Answer:

2 option

Explanation:

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