Pls help me I don’t understand it’s for my science class.

Plz check if correct and tell me wether each is element or compound

Answer:

There is this property called CATENATION which is basically the tendency of the atoms to bind to eachother. It is the MOST in the carbon after that silicon.

So the answer should Carbon atoms bond together to form groups of compounds.

Answer:

D

Explanation:

correct on edge 2021 :)

The movement of the electrons from sphere A to sphere B is shown as the charging method. Thus option D is correct.

An electron is a negatively charged subatomic particle and can either be free or bound to the nucleus and it exists in a spherical shell. of the various radii that represent the energy levels. The movement of the electron from sphere one to sphere two is represented by the image.

Find out more information about the charging method.

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Answer:

C ,,,,,,,,,-;:--::-'

Mass of the water : 2.23 g

Heat

Q = m.c.Δt

m= mass, g

c = heat capacity, for water : 4.18 J/g° C.

ΔT = temperature

Q= 140 J

Δt = 75 - 60 = 15

mass of the water :

[tex]\tt m=\dfrac{Q}{c.\Delta T}=\dfrac{140}{4.18\times 15}=2.23~g[/tex]

Answer:

About 90 percent of water in the atmosphere is produced by evaporation from water bodies, while the other 10 percent comes from transpiration from plants. There is always water in the atmosphere.✌️

Answer:

The charge would be +1

Explanation:

Protons have a positive charge while electrons have a negative charge. Therefore, it's simple subtraction. In every case, subtract the number of electrons from the number of protons.

13 - 12 = 1

Therefore the charge is +1

Here's one more example:

If the element chromium (Cr) has 24 protons and 28 electrons, what is its charge? Remember that protons have a positive charge and electrons have a negative charge.

24 - 28 = -4

Charge = -4

It would be written as followed when associating charge with a specific element: [tex]Cr^{-4}[/tex]

If an element has a neutral charge, that means the number of protons and neutrons are the same. If you look at the periodic table of elements, all of the elements listed have a neutral charge. The 0 isn't showed in the corner because it isn't necessary.

Bonus Information:

This isn't related to your question, but I've come across confusions when it comes to particles. Remember that protons (+) and electrons (-) are the only particles that have a charge, therefore, as it says in it's name, neutrons are neutral or have no charge. Neutrons do not contribute to charge, but they do contribute to the mass of an atom. So the number of protons added to the number of neutrons equate to the mass of an atom. Electrons have mass, but it's so miniscule and insignificant that it doesn't even contribute to the overall mass of the atom, so don't count those.

Remember:

C = p - e

M = p + n

C = atomic charge, M = atomic mass, p =protons, n = neutrons, e = electrons

I hope this helps!

Answer:

12 grams

Explanation:

96g=0 years

48g=250 years

24g=500 years

12g=750 years

Answer:

No

Explanation:

WHAT

Answer:

no.............

Answer:

I believe the Answer is B, as time is not dependent on growth, but growth is dependent on time.

Explanation:

Answer: They are both processes that physically change a substance.

Explanation:

To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. The correct option is option A.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit. Atoms can make many different molecules, just like letters can make many different words.

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.

Therefore, the correct option is option A that is Atoms can make many different molecules, just like letters can make many different words.

To know more about atom, here:

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Answer:

Sugar can be obtained by evaporation.

Filtering wont work because sugar is soluble in water thus will mix to form one layer.

Heat released : 79086 J

Condenses :

1. phase change (gas - liquid) : heat of vaporization (ΔH vap for water = 2260 J/g)

2. cools from 100 - 10 : (Q=m.cΔT)

1. Q=m.ΔH vap

[tex]\tt Q=30\times 2260=67800~J[/tex]

2. Q=mc.ΔT(c water = 4.18 J/g C)

[tex]\tt Q=30\times 4.18\times (100-10)\\\\Q=11286~J[/tex]

Q tot = 67800 + 11286 = 79086 J

The speed : 2222.2 cm/s

Velocity has magnitude and direction  

Can be formulated :

v= velocity, m/s

d=distance=m

t=time,s

convert from km/h to cm/s :

Answer:

[tex]0.8696\ \text{J/g}^{\circ}\text{C}[/tex]

Explanation:

[tex]m_m[/tex] = Mass of metal = 19 g

[tex]c_m[/tex] = Specific heat of the metal

[tex]\Delta T_m[/tex] = Temperature difference of the metal = [tex]99-23=76^{\circ}\text{C}[/tex]

V = Volume of water = 150 mL = [tex]150\ \text{cm}^3[/tex]

[tex]\rho[/tex] = Density of water = [tex]1\ \text{g/cm}^3[/tex]

[tex]c_w[/tex] = Specific heat of the water = 4.186 J/g°C

[tex]\Delta T_w[/tex] = Temperature difference of the water = [tex]23-21=2^{\circ}\text{C}[/tex]

Mass of water

[tex]m_w= \rho V\\\Rightarrow m_w=1\times 150\\\Rightarrow m_w=150\ \text{g}[/tex]

Heat lost will be equal to the heat gained so we get

[tex]m_mc_m\Delta T_m=m_wc_w\Delta T_w\\\Rightarrow c_m=\dfrac{m_wc_w\Delta T_w}{m_m\Delta T_m}\\\Rightarrow c_m=\dfrac{150\times 4.186\times 2}{19\times 76}\\\Rightarrow c_m=0.8696\ \text{J/g}^{\circ}\text{C}[/tex]

The specific heat of the metal is [tex]0.8696\ \text{J/g}^{\circ}\text{C}[/tex].

Answer:

Light receptors within the eye transmit messages to the brain, which produces the familiar sensations of color. Newton observed that color is not inherent in objects. Rather, the surface of an object reflects some colors and absorbs all the others. We perceive only the reflected colors.

Answer:it is convection

Answer:

Explanation:

The amount of force can be found by using the formula

[tex]f = \frac{w}{d} \\ [/tex]

w is the workdone

d is the distance

From the question we have

[tex]f = \frac{15000}{5} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

Explain that as the water evaporates, water molecules go into the air. The water molecules that evaporate become a gas called water vapor. Only the water evaporates, leaving the sodium and chloride ions behind. The sodium and chloride ions attract each other and re- form salt crystals.

Hope this helps!! :D

Answer:

In physics and chemistry, ionization energy or ionisation energy, is the minimum amount of energy required to remove the most loosely bound electron of an isolated neutral gaseous atom or molecule.

I hoped this helped :D

Explanation:

Compound name:

Bromine chloride

Bond type:

Covalent Bond

Reasoning for Bond type:

Formed between nonmetal and nonmetal atoms

Br (Bromine) is a nonmetal. Also, known as a liquid.

Cl (Chlorine) is a nonmetal. Also, know as a gas.

Use this website for more element information:

https://ptable.com/#Properties

An information does the activity series of metals give us that it compares how reactive the metals are. Therefore, option B is correct.

Metals are lustrous, opaque elements that conduct heat and electricity well. Most metals are malleable and ductile, and they are denser than the other elements.

The term "metal" is thought to have originated during the hippie movement, when "heavy" meant serious or deep. Metal music is defined by several elements, including heavily distorted guitar riffs and chords, powerful drumming, extra low-range bass notes, and aggressive or throaty vocals.

Thus, An information does the activity series of metals give us that it compares how reactive the metals are, option B is correct.

To learn more about the metals, follow the link;

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Answer:

It compares how reactive the metals are.

Explanation:

just did it

Answer:

A,

Explanation:

A renewable energy resources can be renewed meaning it will not run out.

Answer:I think its B

Explanation:

Answer:

B

Explanation:

it is B becuse my teacher told me it is

Answer:

I NEED HELP TOO

Answer:

2.14 x 10²⁴ formula units

Explanation:

Given parameters:

Number of moles of NaCl  = 3.55moles

Unknown:

Formula units of NaCl  = ?

Solution:

A mole of substance contains the avogadro's number of particles. The number of particles could be protons, atoms, neutrons, formula units etc.

  1 mole of substance  = 6.02 x 10²³ formula units

   3.55 mole of NaCl  = 3.55 x 6.02 x 10²³

                                    = 2.14 x 10²⁴ formula units