A manufacturer selected a metal to use in producing a lightweight button for clothing. A metal that has a density of 2.71 g/cm3 was selected. Which of the metals was selected?

Answer:

D. 1, 2, and 3

Explanation:

2Al+6HCl ->2AlCl3+3H2      .nAl=m/M=13,5/27=0,5(mol) =>nH2=0,5.3/2=0,75(mol)....VH2=n.22,4=0,75.22,4=16,8(lít)...

Answer:

the 3rd option is the answer

Answer:

A metal oxide with formula K2O. Potassium oxide (K2O) is an ionic compound of potassium and oxygen. It is a base. This pale yellow solid is the simplest oxide of potassium.

Explanation:

Ionic liquids offer numerous advantages over conventional organic solvents for carrying out organic reactions, Malhotra notes. "In many cases, product recovery is easier, catalysts can be recycled, and the ionic liquids can be reused," he says. "In addition, their thermodynamic and kinetic behavior is different.

Answer:

I,II and III

Explanation:

Hope this helps :)

Answer:

l and III is the answer.

hope it hepls

Answer:

Comparison of whole genome sequences provides a highly detailed view of how organisms are related to each other at the genetic level.

Explanation:

am not sure

Explanation:

1T

2T

3T

4F

5F

6F

7F

8T

9T

10T

Answer:

remain at rest

Explanation:

Answer:

Here use this to help you

Explanation:

The atomic number of fluorine is 9.

The charge number of an atomic nucleus is known as the atomic number or nuclear charge number of a chemical element. It will be is equal to the proton number of every atom of that element, for ordinary nuclei. Atomic number helps to getting information of elements with the aid of periodic table.

Atomic number = count of proton

It is known that the atomic number of fluorine is 9 . therefore, the answer will be atomic number.

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Answer:

Cl2 does not have any charge

Explanation:

But when it is present in its ionic form then chlorine have -1 charge on it. But charge on chlorine varies from -1 to +7

Answer:

Calcium has 20 protons 26 neutrons and 20 electrons.

argon has 18 protons

22 neutrons and 18 electrons

Bromine has 35 protons 44 neutrons and 35 electonrs

Explanation:

good luck with your homework hope I helped

Answer:

The only one I know is NaC2HO4.

There is Sodium, Carbon, Hydrogen and Oxygen.

1 atom in sodium, 2 atoms in carbon, 1 atom in hydrogen and 4 atoms in oxygen completeting the total of 8 atoms in this element.

The elements are the simplest chemical forms and they cannot be broken down through chemical reactions. There are many elements in the given formulas.

The elements are defined as those substances whose atoms all have the same number of protons. The elements are considered as the building blocks of matter. Each element has an atomic number and a symbol.

Each atom is regarded as an element. The elements create bonds to form molecules. The isotopes are the elements with the same atomic number but different mass numbers.

NaC₂HO₄  - 'N' , 'C', 'H','O'

H₂F₅BLi - 'H','F','B','Li'

He₂PSO₄ - 'He', 'P','S','O'

He₂O₄PH - 'He', 'O','P','H'

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Answer:

When the volume decreases, the pressure increases. This shows that the pressure of a gas is inversely proportional to its volume. This is shown by the following equation - which is often called Boyle's law. ... It means that for a gas at a constant temperature, pressure × volume is also constant.

Explanation:

may i have the brainlyest

Answer:

When the volume decreases, the pressure increases. This shows that the pressure of a gas is inversely proportional to its volume. ... It means that for a gas at a constant temperature, pressure × volume is also constant.

Explanation:

Answer:

3.5 meters per second

Explanation:

10.5 divided by 3 equals 3.5

Answer:

Wave is a disturbance or energy that propagate through medium from one point to other point

So basically it is a flowing energy that flows into the medium and hence medium particles start oscillating about their mean position to and fro.

This motion of medium particles or this to and fro motion is about their mean position and this will always be cyclic or periodic motion

This means the disturbance or energy continuously flow through the medium such that it will change the position of medium particle and this will be cyclic in order

For an example

y(x,t) = Asin(kx - ωt + φ)

So here above equation of wave is a travelling wave in which displacement of medium particle from its mean position is given by "y"

Now we can see that this disturbance depends upon the sine function and it will repeat its same position after every 2 pi time interval as it is cyclic function for this value

Due to this phenomenon of repetition of its same position we can say that it is disturbance of wave is cyclic.

Explanation:

Answer:

I think its electromagnetic spectrum

Answer:

Radiant energy is energy that travels in waves and can travel through space. The sun gives off radiant energy and is important here on earth for many natural processes to occur. The electromagnetic spectrum is the range of all forms of radiant energy from gamma rays to radio waves.

Explanation:

Explanation:

The water molecule has a tiny negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms due to the unequal sharing of electrons.

Answer:

Savory. Savory taste is caused by amino acids. It's commonly brought on by aspartic acid or glutamic acid. Occasionally, savory is also called “umami” or “meaty.”

Explanation:

Hope this helps.

Answer:

Sulphur

Explanation:

Sulphur evolves the elastics of rubber, therein by heating it to make it...Hot.

Answer:

two oxygen atoms on the left side of the arrow

When Stephen Hawking was diagnosed with ALS at age 21, he knew he had little time left. But he also knew he wanted to do so much more first. With these circumstances, he learned the importance of carpe diem .

Answer:

see explanation

Explanation:

number of moles = mass ÷ relative formula mass

e.g.

Calculate the number of moles of carbon dioxide molecules in 22 g of CO2.

Ar (relative atomic mass) of C = 12, Ar of O = 16

Mr (relative formula mass) of carbon dioxide = 12 + 16 + 16 = 44

number of moles = 22 ÷ 44 = 0.5 mol

Explanation:

a) blue litmus paper turns red when u add acid in it .

b) red litmus paper , when an alkali dissolves in water it produce hydroxide ions

which cause it to become a alkaline

Answer: It has to be stratosphere because This region of the atmosphere is called the stratosphere. It is present in stratosphere According to NASA earth have 6 atmospheric layers..the layer just above the earth is troposphere and above this layer is the stratosphere.

Explanation:

Answer:

Copper is a metal made up of copper atoms closely packed together. As a result, the electrons can move freely through the metal. For this reason, they are known as free electrons. They are also known as conduction electrons because they help copper be a good conductor of heat and electricity.

Explanation: