Answer:
It determines the number of molecules
Answer:
it means there are 3 hydrogen atoms in the compound.
Is cobalt magnetic? pls help
Answer:
no it is not
Explanation:
What is the charge of a beta particle?
Answer:
Beta particles have a charge of minus 1.
Explanation:
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Answer:
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Explanation:
Beta particles have a mass which is half of one thousandth of the mass of a proton and carry either a single negative (electron) or positive (positron) charge. As they have a small mass and can be released with high energy, they can reach relativistic speeds (close to the speed of light)
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For your 13th answer in #4, what is the other name for this particle?
Answer:
The First layer is the troposphere. The troposphere is what we live in. It creates weather for us. Second layer is the Stratosphere. You will find the ozone layer in it. The ozone layer helps protect us from ultraviolet radiation (UV) from the sun. In fact, the ozone layer absorbs most of the UV radiation the sun sends to us. Life as we know it wouldn't be possible without this layer of protection. Third layer is Mesosphere. The Mesosphere is very important for earth's protection. The mesosphere burns up most meteors and asteroids before they are able to reach the earth's surface. Fourth layer is Thermosphere. The Thermosphere absorbs the sun radiation making it very hot.
Explanation: I don't know if you include this one but the fifth layer is the Exosphere. Although the exosphere is the most distance layer of earth's atmosphere it is the layer that is the planet's first line of defense against the sun's rays. It is also the first layer to come into contact and protect the earth from meteors, asteroids, and cosmic rays.
Answer:
Explanation:
The really interesting characteristic of the atmosphere is that each layer has a different temperature range. That is truly incredible when you list them.
The first layer is the troposphere. It is the layer closest to the earth's surface. It is 12 km high and goes from 15oC to - 56oC
The next layer is the Stratosphere. It is 38 km above the Troposphere and the temperature goes from -56 to -2.5
The third layer is Mesosphere. It is 40 km above the Stratosphere and the temperature goes from -2.5 to -86.5
The next layer is the Thermosphere. It is 710 km above the Mesosphere. It goes from - 86.5 to 1200o C So this goes from - 100 roughly to + 1200. That is a massive distance. It speaks wonders of how balanced this planet really is.
The final layer is the Exosphere. It goes up to 3000 km. The temperature is consistently at 1200oC
What I don't understand is how you get the layers from a 13 answer of something. What is the first name of the particle? That would seem to have nothing to do with this answer. Please explain because this was a good deal of work that might be for nothing. Mind you the answer is very interesting.
A solution is
Question 6 options:
a homogeneous mixture.
a compound.
chemically separable.
a heterogeneous mixture.
Answer:
the first one. a homogeneous mixture.
Explanation:
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A student calculates the density of an unknown metal sample to be 8.25 g/cm3
Which set of data from the student's notebook correctly calculates the density of her unknown metal sample?
A
Mass = 165.2 g, Volume = 21.2 cm3
В.
Mass = 198.0 g. Volume = 24.0 cm3
С
Mass = 82.5 g. Volume = 11.0 cm3
D.
Mass = 202.5 g. Volume = 25.0 cm3
Answer:
the answer is b
Explanation:
mass=198 divided by volume 24 gives you 8.25
Which covalent bond is the most polar?
a) S-O
b) C=0
c) Se-F
d) H-O
e) O=O
what happens when a covalent bond vs. an ionic bond is formed?
Explanation:
Ionic bonds form when a nonmetal and a metal exchange electrons, while covalent bonds form when electrons are shared between two nonmetals. ... A covalent bond involves a pair of electrons being shared between atoms. Atoms form covalent bonds in order to reach a more stable state.
Which electron are the valence electrons of the atom?
A. The electrons that have lost their charge
B. The electrons closest to the nucleus
C. The electrons that have entered the nucleus
D. The electrons farthest away from the nucleus
Answer:
D.
Explanation:
The valence electrons are located in the outermost shell.
Which of the following scenarios would not prompt the cell to start dividing
Answer:
what r the options??????
Do electrons have psrticle nature or wave nature?
Explanation:
they have wave nature
its correct answer
How do water currents transfer heat different part of the ocean?
Answer:
Energy in the ocean and the atmosphere
Explanation:
Hope this helps!
*
What part does uplift play in the rock cycle?
A. It pulls rocks deep into Earth.
B. It pushes rocks up towards Earth's surface.
C. It breaks rocks into sediment.
D.It decreases pressure on buried rocks.
Answer:
Sometimes forces act to pull sections of the Earth's crust apart. At other times they are forced together. All this movement can cause rocks that were once underground to be brought up to the Earth's surface. This process is called uplift.
Explanation:
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Determine the number of grams in each of the quantities
1.39.0 x 1024 molecules Cl2
Mass of Cl₂ : 164.01 g
Further explanationA mole is a number of particles(atoms, molecules, ions) in a substance
This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles
Can be formulated :
N = n x No
N = number of particles
n = mol
No = 6.02.10²³ = Avogadro's number
mol Cl₂ :
[tex]\tt n=\dfrac{N}{No}\\\\n=\dfrac{1.39.10^{24}}{6.02.10^{23}}\\\\n=2.31[/tex]
mass Cl₂(MW=71 g/mol) :
[tex]\tt mass=mol\times MW\\\\mass=2.31\times 71=164.01[/tex]
Answer:
hui
Explanation:
Explain the bond between Mg2C12 and also what type of bond will it be ionic or covalent?
How are light bulbs made
Answer:
Explanation: The air inside the bulb is taken out and replaced with a gaseous mixture of argon and nitrogen which help ensure a longer-life for the filament. The bulb will be tested to make sure they're up to the job.
Why is a synthetic gemstone (made by humans) not considered a mineral?
Answer:simce it’s manmade, it doesn’t have all the elements it needed if it was natural. It’s basically synthetic or artificial
Explanation:
Cannot be chemically broken down into simpler substances
An element is the simplest form of matter that has a unique set of properties. Elements cannot be broken down into a simpler substance. Likewise, one element cannot be chemically converted into a different element.
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Answer:
element
Explanation:
Because
which element has chemical properties that are most similar to potassium?
a. calcium
b. cesium
c. nitrogen
d. sulfur
Answer:
CESIUM
Explanation:
Potassium is one of the alkali metals. The alkali metals are the elements that make up Group 1 (IA) of the periodic table. The periodic table is a chart that shows how chemical elements are related to one another. The alkali metals also include lithium, sodium, rubidium, cesium, and francium.
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The element which contains similar chemical properties as of Potassium would be:
B). Cesium
'Potassium' is described as the element that is 'soft and waxy in appearance' with the symbol K and atomic number 19 and "Cesium' is also soft in nature and it possesses a goldy finish.
The similarity between the chemical properties of 'Potassium' and 'Cesium' include:
Both are the components of the group of alkali metals. Both of them are highly responsive metals. 'Potassium' and 'Cesium,' both are soft in texture.Thus, option B is the correct answer.
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Answer:
Option 2
Explanation:
How many molecules of SrCrO4 are in a sample of SrCrO4 0.556 moles?
Answer:
[tex]3.35*10^{23}\ SrCrO_4\ molecules[/tex]
Explanation:
[tex]We\ are\ given\ that,\\No.\ of\ moles\ of\ SrCrO_4=0.556\\Hence,\\As\ we\ know\ that,\\No.\ of\ particles=Avagadro's\ Constant*No.\ of\ moles\\We\ already\ know\ that\ Avagadro's\ Constant=6.022*10^{23}\\Here,\\No.\ of\ SrCrO_4\ molecules= 6.022*10^{23}*0.556\\Hence,\\No.\ of\ SrCrO_4\ molecules=3.348*10^{23} molecules\ \approx 3.35*10^{23}\ SrCrO_4\ molecules[/tex]
Mercury is an element that forms during _____
Answer:
forms of mercury
Explanation:
Answer:
Explanation:
Mercury is an element and a metal that is found in air, water, and soil.Mercury rarely occurs uncombined in nature, but can be found as droplets in cinnabar (mercury sulfide) ores. China and Kyrgyzstan are the main producers of mercury. The metal is obtained by heating cinnabar in a current of air and condensing the vapour.
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New colors produced when any two of the primary colors of pigment are mixed; red, green, and blue
Answer:
A simulated example of additive color mixing. Additive primaries act as sources of light. The primaries red, green, and blue combine pairwise to produce the additive secondaries cyan, magenta, and yellow. Combining all three primaries (center) produces white.
when all of the primary colors are mixed it makes black
Explanation:
The sum of the atomic masses of all the atoms in a compound is called the
What is the force of attraction between two atoms that are combined?
a. chemical bond
b. atomic bond
c. physical property
d. magnetic bond
Answer:
a
Explanation
Chemical bond refers to the forces holding atoms together to form molecules and solids. This force is of an electric nature, and the attraction between electrons of one atom to the nucleus of another atom contributes to what is known as chemical bonds.
A clear, pure liquid sample is brought into the lab and exposed to an electrical current. Different gases are
produced on each of the electrodes. The sample is -
a. an element
b. an alloy
c. a compound
d. a polymer
The sample here is a compound. The correct option is c.
What is a compound?A chemical compound is a substance made up of many identical molecules that contain atoms from more than one chemical element and are held together by chemical bonds.
A molecule made up of only one element's atoms is thus not a compound.
The anode undergoes oxidation, while the cathode undergoes reduction. The species being oxidized provides the electrons.
An electrode in an electrochemical cell is referred to as an anode or a cathode depending on the direction of electron flow.
The electrode reacts with the electrolyte at the anode, producing electrons.
These electrons build up at the anode. Meanwhile, another chemical reaction occurs at the cathode, allowing that electrode to accept electrons.
Thus, the correct option is c.
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What is the name for the compound formed between nitrogen and magnesium. (show your work)
Answer:
the compound formed between nitrogen and magnesium is Magnesium Nitride
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{calcium nuclear charge 20+}
{calcium atomic mass 40amu}
1) determine the number of charged particles in the nucleus of calcium atom then deduce the number of electrons
{given the relative charge of a proton =1+\m 1 nucleon = 1amu}
2) determine its mass number A
3) determine the competition of this calcium atom
Answer:
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Explanation:
Calcium has an atomic number of 20 and an atomic mass of 40
The mass number of an isotope is the sum of the number of protons and neutrons in the atomic nucleus. The atomic number is the number of protons. The calcium-40 isotope has a mass number of 40 , and an atomic number of 20 , therefore it has 20 protons.
Reaction type
Li + N2
Li3N
Answer:
Combination or synthesis
Explanation:
The given reaction is:
6Li + N₂ → 2 Li₃N
This reaction is a synthesis or combination reaction. 6 moles of Li combines with nitrogen gas to produce 2 moles of Li₃N.
In a synthesis reaction, two substances combines together to give singular product. The formation of compounds from the union of the constituent elements falls into this category of reaction.What type of energy uses turbines
with huge blades that spin when
the wind blows to generate
electricity?
Answer:
The answer is : D. Wind energy
Question 9 of 10
Which of the following is the best definition of a chemical change?
A. A change in a substance where a phase change occurs
B. A change in a substance where one or more new substances form
C. A change in a substance where no new substance forms
O D. A change in a substance where energy is conserved
SUBMIT
th
Answer:
B
Explanation:
a chemical change is where two chemicals come in to create a new chemical
Answer:
A change in a substance with no new substances being formed
Explanation:
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