Chất được chia làm bao nhiêu loại? Lấy ví dụ cho từng loại.

Answers

Answer 1
Chất được chia làm hai loại là đơn chất và hợp chất.
Đơn chất: Cu, Cu2+,...
Hợp chất: CuO, CuCl2,...

Related Questions

Question 7 of 10
How much energy is required to melt 2 kg of aluminum? Use the table below
and this equation: Q- mLfusion
Substance
Latent Heat
Fusion
(melting)
(kJ/kg)
Melting
Point
(°C)
Latent Heat
Vaporization
(boiling) (kJ/kg)
Boiling
Point
("C)
Aluminum
400
660
1100
2450
Copper
207
1083
4730
2566
Gold
628
1063
1720
2808
Helium
5.2
-270
21
-269
Lead
245
327
871
1751
Mercury
11.4
-39
295
357
Water
335
0
2258
100
A. 2200 kJ
B. 800 kJ
C. 1600 kJ
D. 1100 kJ

Answers

Answer:

NO 2200! 800 proprobably

Explanation:

just did wrong

Answer:

800 kJ

Explanation:

A cart accelerating slower when mass was increased.
1st Law - 3rd Law

Answers

Answer:

Newton's second law

Explanation:

It is mentioning acceleration and mass

Newton's second law's equation = F = m*a

Hope u understood

Please mark brainliest

Thank You

can someone please explain core and valence electrons in periods for me please​

Answers

Answer:

The electrons of an atom are typically divided into two categories: valence and core electrons. Valence electrons occupy the outermost shell or highest energy level of an atom while core electrons are those occupying the innermost shell or lowest energy levels

Explanation:

i hope u get it :))

Please select the word from the list that best fits the definition
Flow of blood from the heart to the body tissues and back to the heart

Artery
Vein
Capillary
Systemic Circulation
Pulmonary Circulation

Answers

Answer:

Systemic Circulation

Explanation:

Answer:

Systemic Circuit

Systemic circulation carries oxygenated blood from the left ventricle, through the arteries, to the capillaries in the tissues of the body. From the tissue capillaries, the deoxygenated blood returns through a system of veins to the right atrium of the heart.

Explanation:

I hope it's helpful for you ☺️

State with reasons, whether sulphur dioxide is acting as an oxidizing agent or a reducing agent in each of the following reactions:

•2H2S(g) + SO2(g) -> 2H2O(l) + 3S(s)

•SO2(g) +H2O(l) +NaClO(aq) -> NaCl(aq) + H2SO4(aq)

Answers

Answer:

A) oxidizing agent is SO2

B) NaClO is the oxidizing agent

Explanation:

A) This is a redox reaction in which oxidation and reduction occur simultaneously.

Thus, in 2H2S(g) + SO2(g) -> 2H2O(l) + 3S(s);

H2S is reduced as follows;

H2S → S + 2H+ + 2e−

We can see that SO2 has been reduced while H2S gets oxidized since it has changed state from - 2 to 0 . Thus sulphur dioxide is the oxidizing agent.

B) SO2(g) + H2O(l) + NaClO(aq) -> NaCl(aq) + H2SO4(aq)

In this, SO2 undergoes oxidation and NaClO is the oxidizing agent

Es para hoy, ayuda por favor

Answers

En que necesitas ayuda para hoy ?

Answer: it)s not letting me download it edit it a d re send it

Explanation:

-. You have 100 grams of methane. How many moles do you have?

Answers

Answer:

6.25mol

Explanation:

Using the following formula;

Mole = mass ÷ molar mass

According to this question, there are 100 grams of methane (CH4)

Molar Mass of methane (CH4) = 12 + 1(4)

= 12 + 4

= 16g/mol

mole = 100/16

mole = 6.25moles

Therefore, there are 6.25moles of methane in 100g

What are most likely the values of the quantum numbers I and mI for an
electron in a 3p orbital?

A. I = 1, 2, 3; mI = -1/2, + 1/2
B. I = 3; mI = -1/2, + 1/2
C. I = 0, 1, 2, 3; mI = -1, 0, 1
D. I = 1; mI = -1, 0, 1

Answers

Answer:

I think its D

Not too sure

The quantum numbers denote the position of an electron in the orbital. The angular momentum quantum number (l) and magnetic quantum number (ml) of the 3p orbital is I = 1; mI = -1, 0, 1. Thus, option D is correct.

What are quantum numbers?

The quantum numbers are conserved quantities used to describe the energy and the position of the electron in the atomic orbital. The azimuthal, principal, magnetic, and spin are the four quantum numbers.

The angular momentum quantum number (l) represents the orbital shape and depends on the principal quantum number, n. The magnetic quantum number (ml) represents the orientation.

If an electron is in a 3p orbital then,

n = 3

l = 1

ml = -1, 0, 1

Therefore, option D. 3p orbital contains I = 1; mI = -1, 0, 1.

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What is the biggest earthquake danger to the people inside a building ?

Answers

Answer:

Most of the hazards to people come from man-made structures themselves and the shaking they receive from the earthquake. The real dangers to people are being crushed in a collapsing building, drowning in a flood caused by a broken dam or levee, getting buried under a landslide, or being burned in a fire.

Hope this helps :> <3

Which reaction occurs at the cathode of a galvanic cell that has an aluminum electrode in an electrolyte with aluminum ions and copper electrode in an electrolyte with copper ions ? The reduction potential for the reduction of Cu^ 2+ = 0.34 The reduction potential for the reduction of AP^ 3+ =-1.68V.

Answers

Answer:

[tex]{ \bf{Cu {}^{2 + } + 2e \: → \: Cu }}[/tex]

The reaction that occurs at the cathode of a given galvanic cell is:

Cu²⁺  + 2e⁻  → Cu

What is Galvanic Cell?

A galvanic cell can be defined as an electrochemical cell that converts the chemical energy of spontaneous redox reactions into electrical energy. The galvanic cell makes use of chemical reactions to generate electrical energy.

A galvanic cell consists of two half-cells and a salt bridge. Each half-cell further contains an electrode dipped into an electrolyte. When both electrodes are dipped in the same electrolyte, then there is no need for a salt bridge.

At the anode, an oxidation reaction occurs at this electrode. At the cathode, reduction occurs at this electrode. The anode has a negative potential with respect to the solution while the cathode has a positive potential with respect to the solution.

As in the question, the reduction of Cu²⁺ has a positive reduction potential. Therefore, the reduction of the copper will occur at the cathode.

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Use the periodic table to determine the electron configuration for aluminum (AI) and arsenic (As) in
noble-gas notation
AL
o [Ar]3s23p!
lo (He]2s22p63s23p!
0 [Ne]3s23p!
0 [Ne]3s23p2
DONE

Answers

Answer:

Aluminum; [Ne]3s²3p¹

Arsenic; [Ar]3d¹⁰4s²4p³

Explanation:

Aluminum

From the periodic table, we have that aluminum, Al, is located in period 3, and group 3A of the periodic table

Therefore, the noble gas that comes before aluminum in the periodic table is neon Ne

The electronic configuration of aluminum is 1s²2s²2p⁶3s²3p¹

The electronic configuration of neon is 1s²2s²2p⁶

Therefore, the electronic configuration of aluminum in noble gas notation (Ne) is therefore;

[Ne]3s²3p¹

Arsenic

Arsenic is located after argon, Ar on the periodic table

The electronic configuration of arsenic is 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p³

The electronic configuration of argon is 1s²2s²2p⁶3s²3p⁶

The electronic configuration of arsenic in noble gas notation (Ar) is given as follows;

[Ar]3d¹⁰4s²4p³

los metales se oxidan

Answers

Los metales no se oxidan

Which of the following would DECREASE the rate of a reaction?

1. add a catalyst
2. increase the concentration
3. increase the volume
4. increase the pressure

Answers

Answer: increasing volume

Explanation: adding a catalyst would increase reaction time and increasing  INCREASING concentration definently makes reaction time alot faster increasing pressure actually makes it more concentrated, so no it is not

3 Cu + 8HNO3 → 3 Cu(NO3)2 + 2 NO + 4 H2O
In the above equation, how many grams of water can be made when 15.9 moles of HNO3 are consumed?

Answers

Answer:

45673

Explanation:

ionic bonds show which characteristics that arent seen in covalent bonds

Answers

Ionic bonds are when one atom is a metal and the other is a nonmetal. One atom has a high electronegativity value while the other value is relatively low. Electrons are transferred in ionic bonds.

In a covalent bond atoms are equal or similar in electronegativity values and both of the atoms are also non metals. Electrons are shared in covalent bonds.

Which compound is a hydrocarbon?


C 2 H 6


H 2 O


CO 2


C 6 H 12 O 6

Answers

Answer:

C2H6 OR C6H12O6 THE ANSWER

Explanation:

C2H6

!!!!!!!!!!

because it has both hydrogen and carbon as given in the word "Hydro-carbon"

rank the intermolecular forces from weakest to strongest. Dipole-induced dipole, London dispersion, hydrogen bond, dipole-dipole

Answers

Answer:

London dispersion,hydrogen bond, dipole-dipole,dipole-induced dipole.

Explanation:

London dispersion < hydrogen bond < dipole-dipole < dipole-induced dipole.

What are intermolecular forces?

Intermolecular forces are the forces which mediate an interaction between molecules, including forces of attraction or repulsion which act between molecules and other types of neighbouring particles.

The London dispersion force is a temporary attractive force that occurs when the electrons in two adjacent atoms make atoms form temporary dipoles.

A hydrogen bond is an intermolecular force that occurs with a special type of dipole-dipole attraction.

Dipole-dipole forces are the forces between the positive side of one polar molecule and the negative side of another polar molecule.

A dipole-induced dipole attraction is a weak attraction that occurs when a polar molecule produces a dipole in an atom or in a nonpolar molecule by arranging of electrons in the nonpolar species.

Hence intermolecular forces from weakest to strongest are:

London dispersion < hydrogen bond < dipole-dipole < dipole-induced dipole.

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Need organic chemistry 11th grade

for practice and 1 question is enough :)

Answers

Answer:

ok all you need is a little study

Explanation:

organic chemistry isn't something to worry about is something that is a very simple concept if you understand what you're doing so a little bit of studying will help you go through it and you really don't this is not the topics that you will really understand if you just go through it as once so there is no need to worry about organic chemistry it is very simple concept just learning you are a you are close just learn all those simple aspects alkane etc it's very easy

Which statement is true for most autotrophic organisms?
A. They carry on extracellular digestion of nutrients before they ingest them.
B. They synthesize organic molecules from inorganic molecules.
C. They obtain organic molecules from heterotrophic organisms.
O O
D. They require no external energy source.

Answers

omg yees

eExplanation:

HCl + Fe?ra gì hihihihi

Answers

Answer:

fecl2+ h2

Explanation:

CH3COOH
a. What is hydrated water?
1
b. How sodium hydrogen carbonate blow up
cake?
2
c. Explain the cause of saying that the reaction no. (ii) is a
hydrolysis reaction.
3
d.) Is the reaction no. (i) said a redox reaction and a
substitution reaction simultaneously? Analyze with
equations.
4​

Answers

Answer:

the water which are very healthy is known as hydrated water

(7) need help asappp plss

Answers

Answer:

See explanation

Explanation:

The cold drink chiller is a cold substance which is inserted into a bottle of drink which contains warm liquid particles at a particular temperature.

Once the drink chiller is inserted, the liquid molecules around the drink chiller become cooler, denser and sink away from the drink chiller. Other warmer, less dense molecules of the liquid drink now replaces them around the drink chiller.

A convection current is thus set up for as long as the drink chiller is working.

What characterizes an Arrhenius acid-base reaction?
O A. It forms a conjugate pair.
O B. It forms a salt and water.
O C. It forms hydrogen gas.
OD. It forms a buffer in water.

Answers

An Arrhenius acid-base reaction forms a salt and water.

Arrhenius acid base reaction forms a salt and water.

Hence, option (B) is correct answer.

What is Arrhenius acid-base reaction ?

Arrhenius acid-base reaction is Arrhenius acid + Arrhenius Base means water + salt. When Arrhenius acid reacts with Arrhenius base it produce water and salt as product. This is known as neutralization reaction.

Thus, from the above conclusion we can say that Arrhenius acid base reaction forms a salt and water.

Hence, option (B) is correct answer.

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The osmotic pressure of a solution formed by dissolving 0.231 g of the protein in 150 mL of water at 298 K is found to be 2.054 torr.

Answers

Answer:

13924g/mol is the molar mass of the protein

Explanation:

What is the molar mass of the protein.

The osmotic pressure of a solution, π, is defined as:

π = c*R*T

Where π is osmotic pressure = 2.054torr* (1atm/760torr) = 2.70x10⁻³atm

c is molar concentration of the protein,

R is gas constant = 0.082atmL/molK

And T is absolute temperature = 298K

Solving the molar concentration:

c = π / RT

c = 2.70x10⁻³atm / 0.082atmL/molK*298K

c = 1.106x10⁻⁴ moles protein / L

The moles of protein in 150mL = 0.150L:

0150L * (1.106x10⁻⁴ moles protein / L) = 1.659x10⁻⁵ moles protein

The molar mass is the ratio of mass and moles:

0.231g / 1.659x10⁻⁵ moles protein =

13924g/mol is the molar mass of the protein

How would the equilibrium of the reaction below be affected if the temperature decreased?​

Answers

Answer:

A. More O2, SO2, and SO3 would be produced.

Explanation:

The half-reaction at the cathode in an electrochemical cell is given below. What other half-reaction would most likely occur at the anode to produce a spontaneous reaction?

Ni^2(aq)+2e-=Ni(s)

A. Cu(s)=Cu^2+(aq)+2e-
B. Zn(s)=Zn^2+(aq)+2e-
C. Mg^2+(aq)+2e-=Mg(s)
D. Ni(s)=Ni^2+(aq)+2e-

Answers

The half-reaction is Zn → Zn⁺² + 2e⁻ which is most likely occur at the anode to produce a spontaneous reaction.

Hence, option (B) is correct answer.

What is Spontaneous Reaction ?

A reaction which occurs without the intervention of outside is called Spontaneous reaction.  The reaction is Spontaneous when the Δ G < 0 and [tex]E^{\circ}_{\text{cell}}[/tex] > 0.

What is Cathode and Anode ?

Cathode where the reduction occurs. Anode where the oxidation take place.

Cathode: Ni⁺² + 2e⁻ → Ni

Anode: Zn → Zn⁺² + 2e⁻

______________________

Zn + Ni⁺² → Zn⁺²  + Ni

The above reaction is spontaneous reaction.

Thus, from the above conclusion we can say that half-reaction is Zn → Zn⁺² + 2e⁻ which is most likely occur at the anode to produce a spontaneous reaction.

Hence, option (B) is correct answer.

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What is the perimeter of a polygon 8cm 6cm, 4cm, 6cm

Answers

Answer:

24cm

Explanation:

The perimeter of a polygon is obtained by the sum of the length of each side of the figure.

The polygon of the problem has four sides with the following measurements:

8cm, 6cm, 4cm and 6cm.

That means the perimeter of this shape is:

8cm + 6cm + 4cm + 6cm =

24cm

7. You have 1.5x1024 atoms of iron. How many moles do you have?

Answers

Answer:

2.49moles

Explanation:

To calculate the number of moles (n), of iron (Fe) in 1.5 × 10²⁴ atoms, we divide the number of atoms by Avogadro's number (6.02 × 10²³).

That is, n = N ÷ nA

Where;

n = number of moles (mol)

N = number of atoms

nA = Avogadro's constant

n = 1.5 × 10²⁴ ÷ 6.02 × 10²³

n = 1.5/6.02 × 10(²⁴ - ²³)

n = 0.249 × 10¹

n = 2.49moles

Which of the following equations is balanced?
(options in photo)

Answers

Answer:

Option (B)

Explanation:

Na2SO4 (aq) + CaCl2 (aq) → CaSO4 (s) + 2 NaCl (aq)

How many atoms of phosphorus are in 7.00 mol of copper(II) phosphate?

Answers

Answer: The number of phosphorus atoms in given amount of copper(II) phosphate is [tex]8.431\times 10^{24}[/tex]

Explanation:

We are given:

Moles of copper(II) phosphate [tex]Cu_3(PO_4)_2[/tex] = 7.00 mol

1 mole of copper(II) phosphate contains 3 moles of copper, 2 moles of phosphorus and 8 moles of oxygen atoms

Moles of phosphorus in copper(II) phosphate = [tex](2\times 7.00mol[/tex]

According to the mole concept:

1 mole of a compound contains [tex]6.022\times 10^{23}[/tex] number of particles

So, 7.00 moles of copper(II) phosphate will contain = [tex](2\times 7\times 6.022\times 10^{23}=8.431\times 10^{24}[/tex] number of phosphorus atoms.

Hence, the number of phosphorus atoms in given amount of copper(II) phosphate is [tex]8.431\times 10^{24}[/tex]

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what is discourse marker In computing earnings per share for a simple capital structure, if the preferred stock is cumulative, the amount that should be deducted as an adjustment to the numerator (earnings) is the:________a. preferred dividends in arrears.b. preferred dividends in arrears times (one minus the income tax rate).c. annual preferred dividend times (one minus the income tax rate).d. none of these. Which of the following acids has a basicity of 2?1 pointethanoic acidhydrochloric acidnitric acidsulphuric acid Find the recursive formula -80, 20, -5 MONTGOMERY INC.Comparative Balance SheetsDecember 31, 2018 and 20172018 2017 Assets Cash $ 38,200 $ 38,700 Accounts receivable, net 10,800 13,400 Inventory 96,800 77,500 Total current assets 145,800 129,600 Equipment 53,600 45,800 Accum. depreciationEquipment (24,200 ) (16,900 )Total assets $ 175,200 $ 158,500 Liabilities and Equity Accounts payable $ 25,700 $ 28,100 Salaries payable 400 500 Total current liabilities 26,100 28,600 Equity Common stock, no par value 129,300 119,000 Retained earnings 19,800 10,900 Total liabilities and equity $ 175,200 $ 158,500 MONTGOMERY INC.Income StatementFor Year Ended December 31, 2018Sales $ 40,300 Cost of goods sold (16,700 )Gross profit 23,600 Operating expenses Depreciation expense $ 7,300 Other expenses 5,000 Total operating expense 12,300 Income before taxes 11,300 Income tax expense 2,400 Net income $ 8,900 Additional InformationNo dividends are declared or paid in 2018.Issued additional stock for $10,300 cash in 2018.Purchased equipment for cash in 2018; no equipment was sold in 2018.1. Use the above financial statements and additional information to prepare a statement of cash flows for the year ended December 31, 2018, using the indirect method. (Amounts to be deducted should be indicated by a minus sign.) Describe the three massive volumes of Indian History. Math.........I need Judson, reaching for his boots, stepped fairly upon the acorn, his foot slid from under him and his head struck the massive table as he fell. Several minutes later he began to regain his senses. Alecs strong arm was supporting his as he lay on the porch and a kindly voice was saying: Twarnt much of a fall, Mr. Webb. You arent cut none; jest knocked out for a minute. Here, take this; itll pull you together. A small glass was pressed to his lips. Dazed and half-conscious, he drank.Explain how Judsons desire to revenge caused his death. Tr li cu hi v sao dng phng vn hay anket A JIT system uses kanban cards to authorize movement of incoming parts. In one portion of the system, a work center uses an average of 110 parts per hour while running. The manager has assigned an inefficiency factor of .20 to the center. Standard containers are designed to hold 4 dozen parts each. The cycle time for parts containers is about 110 minutes. How many containers are needed? who made king hostage for several hours in france? help pleasee ill mark you as the brainliest if you answer less than 10 mins Express the graph in slope-intercept form. When an older child make a younger child shake with fear, what is he or she called? What is the inverse of the function f(x) = one-quarterx 12? please help me 10 points. the atom as a wholedoesnt carry any electric charge. Its called a ____________ _________. Helppppp pleaseeeeFill in the blank by entering just a number for your answer. [tex]\int _{2.2}^{+\infty \:}\frac{10.648}{x^2}[/tex] Arrange the events in the correct chronological order.The French establish a furtrade in Canada.Christopher Columbus setsout on his first voyage.The Muscovy Company isestablished.The Spanish establish theirfirst settlement in NorthAmerica