chemist's found that a complex reaction occurred in three steps. the first step takes 2.5140 * 10^2s to complete, the second step takes 1.40 * 10^-1s, and and the third step takes 7.397 * 10^1s. what is the total amount of time elapsed during the reaction?​

Answer:

I. Concrete sidewalks

Explanation:

One of the factor that affects the infiltration of water into the surface of the soil is the use of concrete sidewalks.

Concrete is impermeable and non - porous media

When concrete pavements are used, water will not be able to move into the ground. They run on the surface and collects into nearby streams and water bodies.

Mass of Oxygen : 8.0 g

Given

1.51 x 10²³ molecules of Oxygen(O₂)

Required

Mass of Oxygen

Solution

1 mol = 6.02 x 10²³ particles(molecules, atoms, ions)

Can be formulated :

N = n x No

n = moles

No = Avogadro's number

Find moles of Oxygen :

n = N/No

n = 1.51 x 10²³ / 6.02 x 10²³

n = 0.251

Mass of Oxygen :

mass = mol x MW O₂

mass = 0.251 x 32 g/mol

mass = 8.032≈ 8.0 g

0.0113 mol Ba(ClO₃)₂

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structures

Step 1: Define

3.45 g Ba(ClO₃)₂

Step 2: Identify Conversions

Molar Mass of Ba - 137.33 g/mol

Molar Mass of Cl - 35.45 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of Ba(ClO₃)₂ - 137.33 + 2(35.45) + 6(16.00) = 304.33 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

0.011336 mol Ba(ClO₃)₂ ≈ 0.0113 mol Ba(ClO₃)₂

4. describe three ways carbon dioxide was removed from the Earth's atmosphere.

Answer: Forests: Photosynthisis helps clear carbon dioxide naturally, Soils naturally store carbon, but agricultural soils are running a big deficit due to intensive use. Because agricultural land is so expansive, Bio-energy with Carbon Capture and Storage (BECCS) is another way to use photosynthesis to combat climate change. However, it is far more complicated than planting trees or managing soils — and it doesn’t always work for the climate.

5. Explain why there is now 21% Oxygen in the Earth's atomosphere compaired to little or no Oxygen in the Earth's atmosphere 4.5 billion years ago.

Answer: cientists believe that the Earth was formed about 4.5 billion years ago. Its early atmosphere was probably formed from the gases given out by volcanoes. It is believed that there was intense volcanic activity for the first billion years of the Earth's existence.The early atmosphere was probably mostly carbon dioxide, with little or no oxygen. There were smaller proportions of water vapour, ammonia and methane. As the Earth cooled down, most of the water vapour condensed and formed the oceans.

Sorry its soooo long TwT

Answer:b

Explanation:

don’t listen to the guy in the comments

The element contains 15 protons (atomic number), 15 electrons, and 16 neutrons (mass number minus atomic number).

The atomic number for any component exists as the number of protons in its atomic nuclei. In a neutral atom, the number of electrons exists exactly as the number of protons. The atomic mass (mass number) exists as the totality of the protons and neutrons in the nucleus. The mass number can change due to the particular that the number of neutrons can vary. Isotopes exists called for their mass numbers.

So, this element contains 15 protons (atomic number), 15 electrons, and 16 neutrons (mass number minus atomic number).

This isotope exists phosphorus - 31, which contains atomic number 15.

Therefore, the correct answer is option B. 15 protons, 16 neutrons, and 15 electrons.

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Hi there,

My answer would be False.

Please mark

Thanks

The statement is false that if one person reacts to something in a certain way, that means ALL people will react to the same situation in the same way (Johnny gets stung by a bee, now he kills every bee he sees).

According to this question, if one person reacts to something in a certain way, that means ALL people will react to the same situation in the same way.

An example then states that Johnny gets stung by a bee and begins to kill every bee he sees.

This statement is false because when Johnny gets stung by a bee, everyone should react to the situation the same way Johny Johnny did.

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Answer: A mixture is when two or more substances combine physically together. However, in water, two hydrogen atoms combine with one oxygen atom chemically, forming a new substance that has properties different from hydrogen alone or oxygen alone. Therefore, water is not a mixture; it is a compound and it is pure. A Orange juice contains particles of solid (pulp) as well as liquid; it is not chemically pure. B Because its composition is not uniform throughout, orange juice is a heterogeneous mixture. A Aluminum oxide is a single, chemically pure compound. A Selenium is one of the known elements.

Hope this helps :)

Answer:

60000J

Explanation:

Given parameters:

Mass of car  = 1200kg

Speed  = 10m/s

Unknown:

Kinetic energy  = ?

Solution:

The kinetic energy is given as:

   Kinetic energy  = [tex]\frac{1}{2}[/tex]  m v²  

Now insert the parameters and solve;

   m is the mass

    v is the velocity  

 Kinetic energy  =  [tex]\frac{1}{2}[/tex] x 1200 x 10²   = 60000J

Answer:

The temperature of the water in both beakers will decrease

Explanation:

Answer:

I believe it's C. "There will be no transfer of heat from the nickel to the water in the glass."

Explanation:

there won't be any transfer of heat from the nickel to the water in the glass because both the nickel and the glass of water are at the same temperature.

Answer:

100 moles of KMnO₄ contain 602.2 × 10²³ formula units.

Explanation:

Given data:

Number of moles of KMnO₄ = 100 mol

Number of formula units = ?

Solution:

The given problem will be solved through Avogadro number.

1 mole contain = 6.022 × 10²³ formula units

100 mol  × 6.022 × 10²³ formula units / 1 mol

602.2 × 10²³ formula units

Thus, 100 moles of KMnO₄ contain 602.2 × 10²³ formula units.

Answer:

The atomic mass of each element is listed below the symbol of the element in the periodic table: Cu =

63.55 amu, Hg = 200.59 amu, S = 32.07 amu, and He = 4.00 amu. The mass of Avogadro’s number of atoms

is the atomic mass expressed in grams. Therefore, 6.02 × 1023 a

Explanation:

Answer:

calcium chloride and silver nitrate

Explanation:

A precipitate is often formed in a double replacement reaction when the reaction yields an insoluble product.

Consider the reaction between calcium chloride and silver nitrate;

CaCl2(aq) + 2AgNO3(aq) -------->2AgCl(s) + Ca(NO3)2(aq)

AgCl is insoluble in water, hence the reaction leads to the formation of a precipitate.

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Answer:

For instance equation C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but PhC2H5 + O2 = PhOH + CO2 + H2O will; Compound states [like (s) (aq) or (g)] are not required. If you do not know what products are enter reagents only and click 'Balance'. In many cases a complete equation will be suggested.

Explanation:

Answer:

relating to the periodic table of the elements or the pattern of chemical properties that underlies it.

Explanation:

Answer:

Periodic refers to properties that repeat at certain intervals. Explanation: The elements on the periodic table repeat at intervals called periods.

Explanation:

Answer:

A. Rarefaction

Explanation:

Answer:

Combustion

---

Answer:

This is not a redox reaction. It is an example of combustion.

Explanation:

Answer:

lithosphere

Explanation:

Earth's interior layers are ordered by density. The densest layer is the solid metal inner core, the mantle is of intermediate density, and the least dense layer is the lithosphere, particularly the continental lithosphere.

The crust is the layer of the earth with the lowest density.

The crust is the rock layer that is the lightest and most buoyant on Earth. 41% of the Earth's surface is covered by continental crust, with a quarter of that covered by ocean floor. The thickness of the continental crust is 20 to 80 kilometers. Four billion years of Earth's history are stored in its rocks.

The crust is the outermost layer of the Earth, and it is only about 5-70 km deep. The mantle is the layer beneath the crust, which is about 2,900 km thick and has a thickness that varies. The core is divided into two sections: the inner core, which is solid, and the outer core, which is liquid. The Earth's surface is made up of several plates, which are continuously changing due to forces within the Earth.

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Answer:

Number of protons = 82

Explanation:

Given data:

Atomic number of Pb = 82

Mass number of Pb-207 = 207

Number of protons = ?

Solution:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

Atomic number of Pb = number of protons or electrons

82 = number of protons or electrons

Mass number = Number of protons + number of neutron

207 = 82 + number of neutron

Number of neutrons = 207 - 82

Number of neutrons = 125

Answer:

F

Explanation:

nonmetal doesn't conduct, is shiny and silver and is solid. Hope this helps :)

Answer:

The answer is Sodium chloride.

Na is sodium and Cl is chlorine.

Answer:

combustion reaction

Explanation:

combustion reactions have the end products H20 and C02

The molar mass of a substance is the mass in grams of one mole of that substance. This mass is given by the atomic weight of the chemical unit that makes up that substance in atomic mass units....

hope that helps

so i think that it is false  because base on the statement above si the decision is yours just read it thanx

Answer:

yes it was a one in four chance

Explanation:

Answer:

F

Cl

Br

I

Explanation:

Br=11.81...

Cl=12.96...

F=17.42...

Iodine=10.45

Answer:

B. is your correct answer

Explanation: