tính chất hoá học của Cu

Answers

Answer 1

Answer:

các oxit đồng khi nó tiếp xúc với không khí. nó phản ứng đặc biệt với oxy trong không khí (không phải hơi ẩm), và tạo ra nấm mốc


Related Questions

the valency of both Oxygen and magnesium is 2 give reason

Answers

Answer:

the valency of an element is its combining capacity that is the number of electrons it requires to lose, gain or share in order to become neutral.

[ An element can become neutral if it completes it's octet. That is if an element has 8 electrons in it'd outermost shell then it is considered neutral ]

The valence of Magnesium is 2 because it requires to lose 2 electrons to become neutral.

whereas, the valence of Oxygen is 2 because it needs to gain 2 electrons to become stable.

Hence they both have the same valence.

One may say that oxygen's valence is -2 while that of Magnesium is + 2. It's meaning is still the same but "-" sign indicates that oxygen will be gaining electrons in the process of becoming stable.

Which of these is a chemical property of a substance?

Answers

Answer:

A chemical property is a characteristic of a substance that may be observed when it participates in a chemical reaction. Examples of chemical properties include flammability, toxicity, chemical stability, and heat of combustion

P +2 Fe +1 N+1 S+6 Mg +2

Answers

Answer:

= P + 2eF + N + S + 6gM + 2

Explanation:

Multiply: 1 . N = N

= P + 2eF + N + 1 . S + 6gM + 2

Multiply: 1 . S = S

= P + 2eF + N + S + 6gM + 2

Hope This Helps!

help please i am confused
It is pholem or phloem​

Answers

Answer:

phloem I believe

Explanation:

dictionary

Which of these is correct please help

Answers

Answer:

NH4+

Explanation:

NH4+ is the acid and NH3 is the base, so NH4+ is the stronger acid.

A free-moving neutron is absorbed by the nucleus of an atom. This can
cause:
A. the protons in the nucleus to begin to search for more protons.
B. the atom to become unstable and rip apart.
C. the bonds in the nucleus to become stronger and release heat.
O D. the atom to absorb more neutrons to balance the protons.

Answers

Answer:

the atom to become unstable and rip apart.

Explanation:

We define radioactivity as the spontaneous disintegration of atoms. It could occur naturally or artificially.

Artificial radioactivity occurs either by the process of nuclear fusion (combination of two light nuclei) or nuclear fission(bombarding of a heavy nucleus with a small particle such as a neutron).

When a heavy nucleus is bombarded with a neutron, the nucleus becomes unstable and rips apart producing a daughter nucleus/nuclei and more neutrons hence the process continues. This is otherwise called a chain reaction.

How many Hydrogen (H) Atoms are in Methylene?​

Answers

Answer:

FOUR HYDROGEN ATOMS

Explanation:

Two C atoms, four H atoms, and two O atoms can also be arranged to form a methyl formate, which is used in manufacturing, as an insecticide, and for quick-drying finishes. Methyl formate molecules have one of the oxygen atoms between the two carbon atoms, differing from the arrangement in acetic acid molecules.

The Methylene group has 2 hydrogen. -CH2

Who discovered how gravity affects objects on Earth quizlet?

Answers

Answer:

Gravity, Isaac Newton discover

What is the definition of a Brønsted-Lowry base? O A. A Brønsted-Lowry base transfers a proton to something else. OB. A Brønsted-Lowry base accepts a proton from something else. C. A Brønsted-Lowry base donates an electron pair to something else. O D. A Brønsted-Lowry base accepts a hydroxide ion from something else.​

Answers

Answer:

the answer is option B it is a proton acceptor

Using the idea of Dobereiner's triads, what conclusion could have been made about magnesium,
had beryllium and calcium already been discovered?

Answers

Answer:

Explanation: Using the idea of Dobereiner's triads, what conclusion could have been made about magnesium,

had beryllium and calcium already been discovered?

The diagram shows three isotopes. What element is represented?

hydrogen

helium

lithium

Answers

Answer:

The diagram shows three isotopes. What element is represented?

A. hydrogen

B. helium

C. lithium

A. hydrogen

A. Is The Correct Answer

Why Don't Birds Get Electrocuted When They Land on Electric Wires?

Answers

Answer:

Birds are able to sit on electrical power lines because the electrical current essentially ignores the bird's presence and continues to travel through the wire instead of through the bird's body. A bird's body is not a good conductor of electricity.

hope i helped

______ exhibits the highest
intermolecular forces of the states of matter.

A. Solid

B. Liquid

C. Gas

D. Vacuum

Answers

I would say A) solid

Describe how you would find out whether copper(ii) oxide was a catalyst for the decomposition of hydrogen peroxide solution. You need to show not only that it speeds the reaction up, but that it is chemically unchanged at the end.​

Answers

Answer:

ds

Explanation:

sds

The structure of copper is described as a lattice of positive ions in a 'sea of electrons'.
Which statements are correct?
1 Copper has a high melting point because of the strong electrostatic attraction
between the positive ions and the 'sea of electrons'.
2 Copper is malleable because the layers of atoms in the lattice can slide over each
other.
3 Copper atoms can be oxidised to form copper ions by losing electrons.
A
1, 2 and 3
B
1 and 2 only
с
1 and 3 only
D 2 and 3 only

Answers

Answer:

A

Explanation:

Metal atoms are held together by metallic bonds. The metallic bonds are composed of a lattice of positive ions in a 'sea of electrons'.

The metal atoms are held together by strong electrostatic attraction between the positive ions and the 'sea of electrons' leading to high melting point of metals including copper.

Similarly, when a metal undergoes stress, the layers of the metal roll over each other but the lattice remains in place. Hence for metals such as Copper, layers of atoms in the lattice can slide over each other thereby making the metal malleable.

Metals oxidize by electron loss. Since Copper is metal, it can also be oxidized to form copper ions by loosing electrons.

helpe pls I will mark brainlest​

Answers

Answer:

What is the question needing to be answered?

Explanation:

Usually with a scientific hypothesis, you ask the question in an if, then statement. For example: If it rains outside, then the ground will be wet. It's kind of like a cause and effect statement.

At a distance of more than three feet from gun to target, there will generally not be signs of gunpowder on the target.
True
False

Answers

The answer to your question is true
True At a distance of more than three feet from gun to target, there will generally not be signs of gunpowder on the target

While a balloon is being filled, if the temperature of the air in the balloon increases, what happens to it’s volume?

Answers

When heating up, the balloon slowly rises and flies up in the air again. Explanation: The volume of the balloon decreases by the low temperature, because the gas inside is cooled down. When heated up, the pressure in the balloon rises, the balloon expands, and will reach to its original shape.

Believe it!!

Pls follow me.

why do scientists classify living things? ( I need 4 reasons why) thank you take care x​

Answers

Answer:

1. To be able to easily name organisms

2. To ease communication among scientists

3. To give knowledge about the broad variety of organisms

4. To make the study of organisms easier

How is the mass of 1 mole of an element determined? O A. It is equal to the atomic mass times Avogadro's number. O B. It is the same as the element's atomic mass, but in grams. O c. It is equal to the atomic number times Avogadro's number. O D. It is the same as the element's atomic number, but in grams.​

Answers

Answer:

Avogadro's number is the number of particles in one mole of anything. In this context, it is the number of atoms in one mole of an element. It's easy to find the mass of a single atom using Avogadro's number. Simply divide the relative atomic mass of the element by Avogadro's number to get the answer in grams.

Answer:

D. It is the same as the element's atomic mass, but in grams.

Explanation:

other answer didn't give the actual option lol


Write the correct IUPAC name for each of the following structures (3 marks per
structure, 1 mark deduction per error):

Answers

Answer:

Methyl group

Explanation:

From the diagram shown, we can see that the family group CH3 is attached to the structure.

This is simply called a methyl group because it is derived from me than and written that way to show the direct bonding between carbon and the 3 hydrogen atoms.

when carbon is heated in a limited supply of oxygen, a gas is obtained.
1 .what is the name of this gas​

Answers

Answer:

carbon monoxide

I think its correct but I am not sure

Answer: when carbon is heated in air carbon dioxide is formed, so is incomplete combustion which results in carbon monoxide.

Explanation: but when carbon dioxide reacts with more oxygen carbon monoxide is formed i guess.

I AM A BIT SURE BUT HOPE THIS HELPSSSS!!!!

HELP ITS DUE SOON PLEASEE

Identify the type of chemical reaction for each of the following:

SnO2(aq) + 2H2(g) → Sn(s) + 2H2O(g)

AgNO3(aq) + KI(aq) → AgI(s) + KNO3(aq)

2Fe(s) + 3Br2(l) → 2FeBr3(s)

3H2SO4(aq) + 2Fe(s) → Fe2(SO4)3(aq) + 3H2(g)

2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(g)

4Al(s) + 3O2(g) → 2Al2O3(s)

2KI(l) → 2K(s) + I2(s)  

3CaCl2(aq) + 2Na3PO4(aq) → Ca3(PO4)2(s) + 6NaCl(aq)

The options are:
Single replacement
Double replacement
Decomposition
Formation
Hydrocarbon combustion

Answers

Answer:

SnO2(aq) + 2H2(g) → Sn(s) + 2H2O(g) - Redox reaction

AgNO3(aq) + KI(aq) → AgI(s) + KNO3(aq) - double replacement reaction

2Fe(s) + 3Br2(l) → 2FeBr3(s) - Formation

3H2SO4(aq) + 2Fe(s) → Fe2(SO4)3(aq) + 3H2(g) - Single replacement

2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(g) - Hydrocarbon combustion

4Al(s) + 3O2(g) → 2Al2O3(s) - Formation

2KI(l) → 2K(s) + I2(s) - Decomposition

3CaCl2(aq) + 2Na3PO4(aq) → Ca3(PO4)2(s) + 6NaCl(aq) - Double replacement

Explanation:

In an oxidation - reduction reaction, the oxidation number of the species involved in the reaction changes from left to right. One specie is oxidized while the other is reduced. E.g in SnO2(aq) + 2H2(g) → Sn(s) + 2H2O(g) - Sn^2+ was reduced while H2 was oxidized.

For a single replacement reaction, one specie is replaced in the reaction e.g H^+ is replaced by Fe^2+ in the reaction, 3H2SO4(aq) + 2Fe(s) → Fe2(SO4)3(aq) + 3H2(g) .

In a double replacement reaction, the ions on the reactant side exchange partners at the product side e.g 3CaCl2(aq) + 2Na3PO4(aq) → Ca3(PO4)2(s) + 6NaCl(aq)

In a formation reaction, two reactants combine to form a product. E.g 2Fe(s) + 3Br2(l) → 2FeBr3(s)

In a decomposition reaction, a compound breaks down to yield its components e.g 2KI(l) → 2K(s) + I2(s)

Hydrocarbon combustion refers to the reaction of a hydrocarbon compound with oxygen e.g 2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(g)

Based on the Lewis/electron dot representation
of the two atoms, predict the ratio of metal
cationic (+) atom to nonmetal anionic (-) atom in
the compound.
.Ca.
.P.
A. 1:1
B. 3:2
C. 2:1
D. 3:1

Can someone plz tell me how to do this.

Answers

Answer:

B or C think so

To begin the experiment, Xavier washed his hands and put on safety goggles. He then measured 120 milliliters of tap water, 2.5 milliliters of baking soda, and 2.5 milliliters of citric acid. The initial temperature of the water was 23.5°C.


Next Xavier added the baking soda and citric acid to the water. The mixture immediately began to bubble vigorously, which lasted for about 30 seconds. The new temperature of the mixture was 17.7°C.

Is a chemical reaction taking place during Xavier’s experiment? How do you know?



WILL GIVE BRAINLIEST!!!!!!!!!!!!!!!

Answers

Answer:

Yes a chemical reaction is taking place.

Explanation:

There is a change in temperature along with bubbling. All signs of a chemical reaction.

Yes a chemical reaction is taking place. Temperature changes are signs of chemical reactions. Bubbling also shows chemical reactions as new substances are being created.

What is the product of the unbalanced equation below?
Al(s) + Br2(g) →
The Periodic Table
O A. Al(s) + Br2(g)
B. AlBr(s)
C. Al2Br3(s)
O D. AlBr3(s)

Answers

Answer:

D

Explanation:

The answer is D. I'm not sure that it is a solid. I don't think it is a ppte, which is the only way it can be a true solid. It is ionic if the reaction is taking place in water and there is someway to start the reaction. Be that as it may, the internal balace numbers of the chemical produced is the only possible answer. The balanced eq;uatioon is

2Al + 3Br2 ==> 2AlBr3

Under which conditions do
metamorphic rocks form during regional metamorphism?

Answers

Answer:

Under regional metamorphism, metamorphic rocks are formed as a result of transformation of large areas of previously existing rocks under the influence of a large amount of heat and pressure which are created by tectonic forces.

Explanation:

Metamorphism is the phenomenon in the formation of metamorphic rocks whereby rocks are changed by heat and pressure. Now, during this process called metamorphism, rocks are bound to change either physically and chemically into a new rock. Now, there are two types of metamorphism namely;

Contact metamorphism and regional metamorphism.

We are concerned with regional metamorphism and it is defined as metamorphic rocks formed as a result of transformation of large areas of previously existing rocks under the influence of a large amount of heat and pressure which are created by tectonic forces.

What happen when:
a. Magnesium Burns in oxygen.
b. Calcium carbonate is heated.
c. Hydrogen reacts with nitrogen at necessary condition.
d. potassium hydroxide reacts with nitric acid.
e. Carbon dioxide is treated with limewater.
Please help me to do this problem.​

Answers

a. Magnesium Burns in oxygen.

--⟩it produces light bright enough to blind you temporarily.

b. Calcium carbonate is heated.

--⟩ form calcium oxide and evolve carbon dioxide gas.

c. Hydrogen reacts with nitrogen at necessary condition.

----⟩some of the hydrogen and nitrogen will react to form ammonia.

d. potassium hydroxide reacts with nitric acid.

---⟩When potassium reacts with nitric acid then, potassium displace hydrogen from its solution and becomes colorless liquid.

e. Carbon dioxide is treated with limewater.

---⟩to form a white precipitate (appears milky) of calcium carbonate, CaCO 3.

Hope it is helpful to you

- Write equations for (a) the decomposition of carbon monoxide-
co_to produce carbon--and oxygen gas and (b) the synthesis reaction for the formation of carbon monoxide from carbon and Oxygen.

Answers

Explanation:

here's the answer to your question about

The plasma membrane is made up of a double layer of

Answers

Answer: yes

Explanation:

bilayer of lipids, oily substances found in all cells

lipids
According to the accepted current theory, known as the fluid mosaic model, the plasma membrane is composed of a double layer (bilayer) of lipids, oily substances found in all cells (see Figure 1).
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what do you mean by social customs and tradition? class eight quesrions Simply this rational expression.URGENT! PICTURE INCLUDED Karl listens to his colleague giving an overview of the store's new leave policy. What behavior can Carl show to show that he cares about what his colleague says? a) click with his finger on his knees b) confirm what is being said with the person next to him c) summarize what he heard at the end of the overview to his colleague d) say yes, ok repeatedly WILL MARK BRAINLIEST IF CORRECT8. Mis amigos y yo ___ los videojuegos todos los fines de semana. *a: estamosb : estmosc : jugamosd : juegamos7. Mi hermana ___ una carta a su novio. *a : practicob : practicac : escribod : escribe6. Paula, Guillermo, y yo ___ en las montaas. *a : montanb : esquiamosc : esquiad : voy4. Leanna y Martn ___ ingls. *a : correb : correnc : hablad : hablan C={X:X is even number X less than n equal to 7} PLEASE HELP AND EXPLAIN!! Find the sum of the geometric sequence. 1, 1/2, 1/4, 1/8, 1/16. Due to the seriousness of the crime, state legislation mandates transferring legal jurisdiction over the most serious and experienced juvenile offenders to the adult court for criminal prosecution. This process is known as: How did you solve 43? I need explanation Ill give brainliest communication is always aa. oneb. two c.threed.four During the performance of the simple staining procedure, you failed to heat fix your E-coli smear preparation. Upon microscopic examination , how would you expect this slide to differ from the correctly prepared slides ? PLEaseeee HELP MEEE I beg pleaseee I think I got this wrong please correct me. Place the steps shown below in the correct order.2.3.1.5.42.1.3.4.504.1.3.5.21.3.4.5.22.4.3.1.5 A small group of mice are released on an island without mice but with abundant food for mice and no predators. After the population size stabilizes for several years, a hurricane drastically reduces it. We can now say that:________.A) the biotic potential of the population has been reduced. B) its new population size is a result of density-dependent regulation. C) its new population size is a result of density-independent regulation. D) it can now act as a sink metapopulation. should there be limits onthe time teens spend online ? Can someone help me with this?-2(10 + x) = 4 radius is 21 5/8 incercepted by 5Pi/6? What is arc lenght? a family block of Chocolate is made up of 6o small squaresmanica eats 10 square John eats 9 Squares and holly eats5 squares what is the fraction of the block of chocolateis left Question 19 of 30How does the distance over which the strong nuclear force acts compare tothe distance over which the other fundamental forces act?O A. The distance is the same as the weak nuclear force and less thangravitational and electrostatic forces.B. The distance is the same as the weak nuclear, gravitational, andelectrostatic forces.O c. The distance is larger than the weak nuclear force but less thangravitational and electrostatic forces.D. The distance is smaller than the gravitational force but later thanweak nuclear and electrostatic forces. A man bought a goldfish in a pet shop. Upon returning home, he put the goldfish in a bowl of recently boiled water that had been cooled quickly. A few minutes later the fish was found dead. Explain what happened to the fish