Avogadro's number represents the number of units in a mole. What is this value?

Answer:

this is good question I am thankful to you

Answer:

The range of the data is 11 hours

Explanation:

edge 2022, trust

Answer: heat

Explanation: if solid ice is heated it becomes in liquid  and then to  gaseous steam.

Answer:

Matter is any substance that has mass and takes up space. Any physical object consists of matter. It doesn't matter whether it's an atom, element, compound, or mixture. It's all matter. (Not a pun, i promise ツ)

However, unlike some believe, not everything you encounter in the world is matter. Matter can be converted into energy, which has neither mass nor volume. So, light, sound, and heat are not matter. Most objects have both matter and some form of energy, so the distinction can be tricky. For example, a candle flame certainly emits energy (light and heat), but it also contains gasses and soot, so it is still matter. The building blocks of matter are called "atoms" and "molecules." They, too, are matter. The matter we can detect normally is called "baryonic" matter. However, there is another type of matter out there, which can't be directly detected. But its influence can. It's called dark matter.

Attached below is a picture of examples of matter.

Key words and phrases:

matter, heat, light, dark matter, baryonic matter, sound, energy, mass, volume, space, physical

Hope this helps! Brainliest would be much appreciated! Have a great day! :)

Answer:

there is 60.7625 grams of magnesium

Answer:

Explanation:

1 mol of magnesium = 25 grams (correct this with the periodic table you were given.

2.5 mols = x grams

1/2.5 = 24/x                   Cross Multiply.

x = 2.5 * 24

x = 60 grams                Remember to correct the 24 with the mass given with your periodic table.

Answer:

chemical energy is your correct answer mark me brainly

Answer:

The nervous system receives and interprets sensory information from the eyes and signals the muscles of the eyes to perform the response.

Explanation:

"The involuntary response of pupils dilating and contracting in response to light involves nerves sending impulses to and from the eyes' light receptors, which in turn tell the muscles in the iris to contract or expand." - Study Island

The moles of oxygen required to completely react with 1-mole acetylene is 2.5 mol.

The moles of reactant and product in a chemical reaction to the whole number ratio is given by the stoichiometric coefficient of the balanced chemical equation.

The balanced chemical equation for the reaction is :

[tex]\rm 2\;C_2H_2\;+\;5\;O_2\;\to\;4\;CO_2\;+\;2\;H_2O[/tex]

From the balanced chemical equation, the 2 moles of acetylene react with 5 moles of oxygen.

The moles of oxygen react with 1 mole of acetylene are:

[tex]\rm 2\;mol\;C_H_2=5\;mol\;O_2\\\\1\;mol\;C_2H_2=\dfrac{5}{2}\;\times\;1\;mol\;O_2\\\\ 1\;mol\;C_2H_2=2.5\;mol\;O_2[/tex]

The moles of oxygen required to completely react with 1-mole acetylene is 2.5 mol.

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Answer:

Water has polar O-H bonds. The negative O atoms attract the positive H atoms in nearby molecules, leading to the unusually strong type of dipole-dipole force called a hydrogen bond.

Explanation:

Answer:

D

Explanation:

Because I carbon atom and 1 hydrogen atom plus 2

Oxygen atoms are needed

Answer:

Lipids are organic molecules characterized by large areas that contain many nonpolar carbon-carbon and carbon-hydrogen bonds, making them hydrophobic.

Recommendations in accidental contact >> First Aid Measures; chemical name >> Identification: possible dangers >> Hazards Id.; incompatibility >> handling; PPE >> Exposure Controls.

Chemical hazards are different types of chemical substances capable of causing harm to human health.

The First-Aid Measures are a series of recommendations on how to minimize the effects caused by accidental exposure to a given chemical hazard.

Personal protective equipment (PPE) is a type of specially designed equipment that protects an employer against safety risks during work.

Learn more about chemical hazards here:

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Answer:

According to Newton's first law of motion, it is the natural tendency of all moving objects to continue in motion in the same direction that they are moving ... unless some form of unbalanced force acts upon the object to deviate its motion from its straight-line path. Moving objects will tend to naturally travel in straight lines; an unbalanced force is only required to cause it to turn. Thus, the presence of an unbalanced force is required for objects to move in circles.

Explanation:

Answer:

              166 g of Zinc

Explanation:

First calculate moles of Gold.

Moles = Mass / M.Mass

Moles = 500 g / 196.96 g/mol

Moles = 2.54 mol

Secondly, calculate mass of Zinc using moles of Gold.

Mass = Moles × M.Mass

Mass = 2.54 mol × 65.36 g/mol

Mass = 166 g of Zinc

The first thing you should do when there is a fire in the laboratory is to alert people.

OSHA is an abbreviation for occupational safety and health administration.

The Occupational Safety and Health Administration (OSHA) is an agency of the federal government that is saddled with the following responsibilities:

According to the Occupational Safety and Health Administration (OSHA), the first thing a worker or student should do when there is a fire in the laboratory is to alert people.

Read more on fire hazards here: https://brainly.com/question/17199752

The reaction has [tex]\Delta G[/tex] value of -296 kJ/mol, and the reaction is spontaneous. Hence, option A is correct.

The value of [tex]\Delta G[/tex] for the reaction is the change in the free energy. The [tex]\Delta G[/tex] for the reaction is calculated as:

[tex]\Delta G=\Delta H-T\Delta S[/tex]

The given reaction is:
[tex]\rm 2\;SO_2\;+\;O_2\;\to\;2\;SO_3[/tex]

The change in enthalpy and entropy is given by the difference in product and reactant.

Thus, the change in free energy is given as:

[tex]\Delta G=(\Delta H_{product}-\Delta H_{reactant})-T(\Delta S_{product}-\Delta S_{reactant})\\\\\Delta G=(2(\Delta H_{SO_3})-(2(\Delta H_{SO_2})\;+\;\Delta S_{O_2}))-T((2(\Delta S_{SO_3})-(2(\Delta S_{SO_2}))[/tex]

Substituting the values in the above equation at a temperature of 300 K.

[tex]\Delta G=(2(-396)-(2(-297)\;+\;(0)))-300\;(2(130.58)-(2(191.50)+(205)))\\\Delta G=(-792-(-1386))-300\;(261.16+588)\\\Delta G=-296\; \rm kJ/mol[/tex]

The negative value of [tex]\Delta G[/tex] represents the reaction to be spontaneous.

Thus, the reaction has [tex]\Delta G[/tex] value of -296 kJ/mol, and the reaction is spontaneous. Hence, option A is correct.

Learn more about free energy, here:

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Answer:

When falling. Such as dropping an item, or tripping over a banana peel!

Explanation:

Gravitational potential energy is the energy stored in an object as the result of its vertical position or height. The energy is stored as the result of the gravitational attraction of the Earth for the object.

Explanation:

hope this helps you

Answer:

A.

Explanation:

got it correct on edge.

Answer:

the first geological time period of the Paleozoic Era

Explanation:

Answer:a movement of positive or negative electric particles (such as electrons) accompanied by such observable effects as the production of heat, of a magnetic field, or of chemical transformations — compare alternating current, direct current, displacement current.

Explanation:

The chemical characteristics or reactivity of a chemical element is highly (mostly) dependent on the: number of valence electrons in its outermost shell.

A chemical characteristic can be defined as the properties of a chemical element or compound that is mainly observable and measurable during a chemical reaction such as reactivity.

A valence electron can be defined as the number of electrons that are present in the outermost shell of an atom of a chemical element.

In Chemistry, the number of valence electrons (valency) is a property that is typically used to determine the chemical characteristics or reactivity of all chemical elements.  

In conclusion, the chemical characteristics or reactivity of a chemical element is highly (mostly) dependent on the number of valence electrons in its outermost shell.

Read more on electrons here: https://brainly.com/question/377844

Explanation:

Molar mass of

B

=

10.81

g

⋅

m

o

l

−

1

. If there are 36 odd grams of

B

, there are approx.

7

2

×

N

A

boron atoms, where

N

A

is Avogadro's number.

Explanation:

35.76

⋅

g

10.81

⋅

g

⋅

m

o

l

−

1

×

6.022

×

10

23

m

o

l

−

1

=

?

?

Answer link

MAT

Nov 15, 2015

1.991

×

10

24

Explanation:

Molar mass of B = 10.81g/mol

So, 1 mole of B = 10.81g

and 1 mole =

N

A

=

6.023

×

10

23

By combining,

10.81g of B =

6.023

×

10

23

atoms of B

thus,

35.76g of B =

6.023

×

10

23

10.81

×

35.76

35.76g of B =

1.991

×

10

24

48.176 × 10¹⁷ atoms of boron are present in 8.0 × 10⁻⁶ moles of boron.

Avogadro's number is the number of particles in one mole of substance. 6.022 × 10²³ is known as Avogadro's constant / Avogadro's number.

Avogadro's number = 6.022 × 10²³

How to find the number of atoms ?

Number of atoms = Number of moles  × Avogadro's Number

                             = 8.0 × 10⁻⁶ × 6.022 × 10²³

                             = 48.176 × 10¹⁷ atoms of boron

Thus, from the above conclusion we can say that 48.176 × 10¹⁷ atoms of boron are present in 8.0 × 10⁻⁶ moles of boron.

Learn more about the Avogadro's Number here: brainly.com/question/859564

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The number of molecules in given amount of water is 10.8396 x 10 by the 23 power.

Answer:

I believe the answer is the last one answer D: Neutral elements

Explanation:

Ionic bonds are formed through the exchange of valence electrons between atoms, typically a metal and a nonmetal. ... Ionic compounds are typically neutral. Ionic compounds generally form between elements that are metals and elements that are nonmetals.

Hope this helps please mark brainliest :)

Answer:

i got a new padlit

Explanation:

Answer:

Conditioning two or three times will insure that the concentration of titrant is not changed by a stray drop of water.

Explanation:

"Check the tip of the buret for an air bubble. To remove an air bubble, whack the side of the buret tip while solution is flowing".

Answer:

Hydrogen is placed in group one (non-metals) because hydrogen is not a metal. It is a highly reactive gas. It has the lowest atomic mass, and belongs with the gases in group one.  

Explanation:

Answer: B or C

Explanation: The question does not include the variable or steps Brian is using so either one could be correct. It has to be the one that he is controlling though. This is because a control group is used to rule out any alternate explanations. Therefore the answer should be the one that he is trying to test out.

Answer:

Big bang theory

Explanation:

Our universe began with an explosion of space itself - the Big Bang. Starting from extremely high density and temperature, space expanded, the universe cooled, and the simplest elements formed. Gravity gradually drew matter together to form the first stars and the first galaxies.

Answer:

The Big Bang

Explanation:

The Big Bang was the moment 13.8 billion years ago when the universe began as a tiny, dense, fireball that exploded. Most astronomers use the Big Bang theory to explain how the universe began.