Please help me I don’t understand this much ://

Answer:

B. They are clones of the parent plant

Explanation:

Answer:

contamination

Explanation:

From the fact that oxygen is in group 16 and carbon is in group 14, the structure of CO2 must be O=C=O. In methane, there is no bond between any of the hydrogen atoms. The structure of H2O2 is H–O–O–H.

Carbon is in group 14 hence it has four valence electrons and oxygen is in group 16 hence it has six valence electrons. This implies that each oxygen atom will share four electrons with carbon in a covalent bond to form the structure O=C=O.

In CH4, we know that carbon is tetravalent so it forms for bonds. Therefore, there is no bond between hydrogen atoms so it bonds with each hydrogen atom; hydrogen only forms one bond.

In H2O2, there is the peroxide ion that has the structure O-O. Hence, the correct structure of H2O2 is H–O–O–H.

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Answer:

clock it'll luck is be FL KS Fb it to KS go out to if go off to kg HR to kg to if he do well all

Answer:

This is the answer.

Explanation:

Answer:

The correct answer is D hydrogen and chlorine need to be balanced there's an equal amount of magnesium on each side. I just took the test and got the correct answer.

Explanation:

Answer:

Explanation:

1mol NaOH---->40

0.01mol NaOH------>x

X=40×0.01=0.4

Answer:

C + O2 ⇒ CO2

mole of O2: 18.6/32=0.58125= mole of CO2

⇒ gram of CO2: 0.58125*(12+32)=25.575

Explanation:

Answer:

Equal

Explanation:

Nitric Acid is a strong acid and therefore completely disassociates.

[tex]\\ \sf\longmapsto Density=\dfrac{Mass}{Volume}[/tex]

[tex]\\ \sf\longmapsto Density=\dfrac{400}{112}[/tex]

[tex]\\ \sf\longmapsto Density=3.57g/mL[/tex]

Household cleaners like bleach are solutions, they help us to make our houses clean. Beverages such as fizzy drinks, mineral water and tea are solutions. 3.. In hydroponics, the roots of plants are immersed in solutions containing dissolved mineral salts

Answer: #20

Explanation:

if the sun got dimmer then plants would that need a high tempature would not be able to grow it would also be very cold

The emission lines of an element is characteristics of the element and can be thought of like a fingerprint for elements. Emission spectra is used to identify the elements.

The electromagnetic radiation spectrum produced when an electron changes from a high energy state to a lower energy state is known as the emission spectrum of a chemical element or chemical compound.

The energy difference between the two states is equal to the photon energy of the emitted photon. Each atom contains a large number of potential electron transitions, and each transition has a distinct energy difference.

An emission spectrum is made up of a variety of transitions that result in various radiated wavelengths. The emission spectra of each element is distinct. Therefore, option d is correct.

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Answer:

có trong vietjack nè má, vô coi đi

Explanation:

https://khoahoc.vietjack.com/question/7374/thuy-phan-hoan-toan-62-5-gam-dung-dich-saccarozo-17-1-trongmoi-truong-axit

Answer:

The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same.

Explanation:

Answer:

hexagon

Explanation:

Answer:

um how is this a question? is there no info on how many protons neutrons electrons and what elements are in the compound. how do you find out a compound if you don't know what the elements in it are

[tex]\\ \sf\longmapsto 9.63\times 10^{-2}m=9.63\times 10^{-2}\times 10^{-9}m=0.0963\times 10^{-9}m=0.0963nm[/tex]

[tex]\\ \sf\longmapsto 6.02\times 10^3ks=6.03\times 10^6s[/tex]

[tex]\\ \sf\longmapsto 8.9\times 10^8\mu g=8.9\times 10^4cg[/tex]

[tex]\\ \sf\longmapsto 4.12\times 10^{-4}Mg=4.12\times 10^{-1}g=0.412g[/tex]

[tex]\\ \sf\longmapsto 7.33\times 10^{-2}Tl=7.33\times 10dL=73.3dL[/tex]

[tex]\\ \sf\longmapsto 0.73kL=0.73(1000)L=730L[/tex]

[tex]\\ \sf\longmapsto 5.93cm^3=0.00000593m^3[/tex]

[tex]⇒9.63 \times {10}^{ - 2} m = 9.63 \times {10}^{ - 2} \times {10}^{9} = 9.63 \times {10}^{ 7} nm \\ [/tex]

[tex]⇒6.02 \times {10}^{3} ks = 6.02 \times {10}^{3} \times {10}^{3} = 6.02 \times {10}^{6} s \\ [/tex]

[tex]⇒8.9 \times {10}^{8} \mu g = 8.9 \times {10}^{8} \times {10}^{ - 4} = 8.9 \times {10}^{4}cg \\ [/tex]

[tex]⇒4.12 \times {10}^{ - 4} mg = 4.12 \times {10}^{ - 4} \times {10}^{3} = 4.12 \times {10}^{ - 1}g \\ [/tex]

[tex]⇒7.33 \times {10}^{ - 2} TL = 7.33 \times {10}^{ - 2} \times {10}^{13} = 7.33 \times {10}^{ 11} dL\\ [/tex]

[tex]⇒0.73kL = 0.73 \times {10}^{3} = 730L[/tex]

[tex]⇒5.93cm {}^{3} = 5.93 \times 10 {}^{6} = 5.93 \times 10 {}^{6}m {}^{3} \\ [/tex]

[tex]⇒498.82cg = 498.82 \: \times 10 = 4988.2 \: cg \\ [/tex]

Answer:

4.40 X 8.0 =35.2

Explanation:

multiply it

Answer:

My answer is d. hope this'll help

Answer:There are two main exceptions to electron configuration: chromium and copper. See below

Explanation:

These two elements are exceptions because it is easier for them to remove a 4s electron and bring it to the 3d subshell, which will give them a half filled or completely filled subshell, creating more stability.

Answer:

[tex]51y6. \times { \times }^{2} [/tex]

Answer:This is a very interesting question. I think of it like this. You have a piece off ice floating in the water. Let's say a portion off. It is submerged. No. If this the portion off the sub marched portion has a volume be, it means that the buoyant force will be times the density off water times G. Now this will be equal to the point force, which is equal to the weight off the ice block. Now, once I this ice turns into water, it will still have the same rate. But now its density will be equal to that of water. So it's wait will be saying mass times G. Now you can cancel T on mass is equal to three times rope. Now, this week is this volume and if you notice, row is also the density of water, which means this mass of water contains will help this volume. It means once the ice becomes water, it perfectly fits into this volume, which means the water level's stays exactly the same. It's almost magical, but what happens if there isn't a butt in a bubble? You can think off it in a slightly mathematical way, If you have an air bubble in on Ice Cube, it's total density. Its average density will be less than the density off ice, but an easier way to think about it is like this. You have a piece off ice, which has in a bubble in it on dhe, obviously that it's water here and now. Once the ice melt, the amount of water displaced will be. The volume of the water displaced will equal the weight off the ice. So the what? The water in the ice, if it's exactly in this volume, so it must still be the same. But the answer will be different if you have a great off sandal. If you have a grain of sand, let's say somewhere over here the total density off the ice cube will be larger. The average density on once the ice melt the sand simply false down, which means this ice this piece off ice was further down than it for the lower in the water than it would have been if it was simply made off ice. So to make up for that, when the ice melts, the amount off the volume off the water will be less than the amount of water displaced, so the level of water will decrease if it were if there were a grain of sand in the ice, so you would expect that the water level would tries if, uh, in the case off the air bubble. But it's the identity of baby. It is so small that it simply doesn't count.

Explanation:

At the atomic level, electrons absorb a particular wavelength of energy and move from a lower to a higher energy level.

In the absorption spectrum, energy is absorbed causing a specie to move from a lower to a higher energy level. This is shown in the diagram attached to this answer.

At the atomic level, electrons absorb a particular wavelength of energy and move from a lower to a higher energy level.

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Answer:

that's true

Explanation:

Beautiful vases, figurines, and plate are a kind of mixture called colloid.

A colloid comprises of the dispersion of one substance in another. Therefore in a colloid there must be;

These beautiful vases, figurines, and plate  are made of ceramics. In ceramics, composite materials and fibers are dispersed in a polymer matrix. Hence these beautiful vases, figurines, and plate are made of colloids.

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#1

Subtract no of electrons from no of protons

Ion A has -2 charge

#2

No of protons=6

No of electrons=6

Answer:

Accuracy is the degree of closeness to true value.

Precision is the degree to which an instrument or process will repeat the same value.

Hope it helps....

Answer:

Accuracy and precision are alike only in the fact that they both refer to the quality of measurement, but they are very different indicators of measurement. Accuracy is the degree of closeness to true value. Precision is the degree to which an instrument or process will repeat the same value

Answer:

The acid is Nitric Acid and the metal zinc

Explanation:

Answer:

1). True

2).True

3).false

4).true

5).true

Answer:

The elements according to the decreasing atomic radius are arranged as-

K, Ca, Sc, Ga, Ge, As, Br, Kr

An atomic radius is half the distance between adjacent atoms of the same element in a molecule. It is a measure of the size of the element’s atoms, which is typically the mean distance from the nucleus centre to the boundary of its surrounding shells of the electrons.

An atom gets larger as the number of electronic shells increase; therefore the radius of atoms increases as you go down a certain group in the periodic table of elements. The atomic radius decreases on moving from left to right across a period.

Thus the elements according to the decreasing atomic radius are arranged as -

K, Ca, Sc, Ga, Ge, As, Br, Kr

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