cho 13,5g nhôm tác dụng với dd HCl dư.Tính khí H2 (đktc) thu được

Answers

Answer 1

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)...


Related Questions

what kind of chemical processes are used to create these synthetic products

Answers

The series of chemical reactions that are used to change natural resources into synthetic products is called chemical synthesis. To make a "natural" product, the natural resource is not chemically changed as much. One example is a wooden chair.

Aluminium is a natural material that is widely utilised in a variety of sectors and may be converted into a variety of synthetic goods via various chemical processes.

The following are some examples of synthetic compounds created from aluminium and the accompanying chemical processes:

Aluminium Foil: Aluminium foil is a thin, flexible sheet of metal.Aluminium Cans: Aluminium cans used for beverage packaging are created through a process known as can forming. Aluminium alloys are synthetic goods formed by mixing aluminium with additional elements such as copper, zinc, magnesium, or silicon.

Thus, these are only a few examples of synthetic goods generated from aluminium and the chemical processes that produce them.

For more details regarding synthetic goods, visit:

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Your question seems incomplete, the probable complete question is:

What synthetic products are derived from the natural resource aluminum? What kind of chemical processes are used to create these synthetic products?

PLEASE HELP !
How does the chemical structure of ionic liquids make them more flexible for scientists to use and what will most likely be the first industrial application of them?

Answers

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.

Someone pls help me I will make you brain

Answers

Answer:

i guess the answer is..true

the ozone in troposphere protects the earth from ultra violet waves that may cause global warming

the mass number for an atom is numerically equal to which quantity

Answers

Answer:

The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in an atom is its mass number minus its atomic number.

Explanation:

protons

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. For example, the mass number of argon atoms and calcium atoms can both be 40.

De quien es el modelo matemático

Answers

Answer:

si

Explanation:

How many moles in 5.75 x 1024 atoms of copper (Cu)? (9.55 mol)

Answers

Answer:

9.55 moles

Explanation:

How many moles are equivalent to 5.75x1024 atoms of Al? 9.55 moles contain 5.75 x 1024 atoms of Al

why do we need to calibrate equipment​

Answers

Answer:

to be precise in the calculations

Explanation: for example your cell phone has a gps inside it, the gps is responsible for providing direction data like a compass, if the equipment is not calibrated, the gps will not find the correct direction.

what is meant by dative covalent bond​

Answers

A coordinate covalent bond, also known as a dative bond, dipolar bond, or coordinate bond is a kind of two-center, two-electron covalent bond in which the two electrons derive from the same atom. The bonding of metal ions to ligands involves this kind of interaction. This type of interaction is central to Lewis theory.

A HOMOGENEOUS LIQUID THAT CANNOT BE SEPARATED INTO ITS COMPONENTS BY DISTILLATION BUT CAN BE DECOMPOSED BY ELECTROLYSIS IS CLASSIFIED AS A/AN _______________.
ELEMENT
SUBSTANCE
COMPOUND
SOLUTION

Answers

Answer:

ELEMENTS

Explanation:

CUZ AN A

ELEMENT IS A GROUP OF ATOMS THAT CANNOT BE BROKEN DOWN BY ANY CHEMICAL OR PHYSICAL MEAN

Four students each measured the mass of 1.43g sample four times

Answers

Answer:

look up 4 divided by 1.43

the fact that matter is not created or destroyed in any chemical or physical change is called the

Answers

Answer:

Law of Conservation of Mass.

Is that Right?

A 0.8612-g sample of a mixture of NaBr, NaI, and NaNO3 was analyzed by adding AgNO3 and precipitating a 1.0186-g mixture of AgBrand AgI. The precipitate was then heated in a stream of Cl2, convertingit to 0.7125 g of AgCl. Calculate the %w/w NaNO3 in the sample.

Answers

Percentage by weight of the NaNO₃, is given by the ratio of the mass of NaNO₃ to the mass of the sample

The percentage by weight of NaNO₃ in the sample is approximately 30.713 %

Reason:

Given parameters are;

Mass of sample of NaBr, NaI, and NaNO₃ mixture = 0.8612 g

Mass of AgNO₃ and AgI formed = 1.0186

Mass of AgCl formed = 0.7125

Required:

Percentage by weight of NaNO₃ in the sample

Solution:

Let A represent NaBr, let B represent NaI, and let C represent NaNO₃, we have;

Equation 1 A + B + C = 0.8612

The addition of AgNO₃, precipitates 1.0186 g mixture of AgBr and AgI, therefore, we have;

[tex]A \cdot\left(\dfrac{Molar \ mass \ of \ AgBr}{Molar \ mass \ of \ NaBr} \right) + B \cdot \left(\dfrac{Molar \ mass \ of \ AgI}{Molar \ mass \ of \ NaI} \right) = 1.0186[/tex]

Molar mass of AgBr = 187.77 g/mol

Molar mass of NaBr = 102.894 g/mol

Molar mass of AgI = 234.77 g/mol

Molar mass of NaI = 149.89 g/mol

Which gives;

Equation 2 [tex]A \cdot\left(\dfrac{187.77}{102.894} \right) + B \cdot \left(\dfrac{234.77}{149.89} \right) = 1.0186[/tex]

The forming of the precipitate by passing the compounds through a stream of chlorine gives;

[tex]A \cdot\left(\dfrac{Molar \ mass \ of \ AgCl}{Molar \ mass \ of \ NaBr} \right) + B \cdot \left(\dfrac{Molar \ mass \ of \ AgCl}{Molar \ mass \ of \ NaI} \right) = 0.7125[/tex]

Molar mass of AgCl = 143.32 g/mol

Therefore, we get;

Equation 3 [tex]A \cdot\left(\dfrac{143.32}{102.894} \right) + B \cdot \left(\dfrac{143.32}{149.89} \right) = 0.7125[/tex]

Solving equation (2), and (3) gives;

A ≈ 0.3252 g, B ≈ 0.2715 g

Plugging in the values of A, and B in equation (1), gives;

0.3252 + 0.2715 + C = 0.8612

C = 0.8612 - (0.3252 + 0.2715) ≈ 0.2645

The mass of NaNO₃ in the mixture, C ≈ 0.2645

[tex]The \ percent \ by \ weight \ of \ NaNO_3 = \dfrac{0.2645}{0.8612} \times 100 \approx \underline{30.713 \%}[/tex]

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KI + Pb(NO3)2 → Pbl2 + KNO3
This chemical reaction represents the reaction of
potassium iodide (KI) and lead nitrate (Pb(NO3)2) to
form lead iodide (Pbl2) and potassium nitrate (KNO3).
When correctly balanced, the coefficient for lead iodide
will be_________.

Select one:
3
6
2

Answers

Answer:   1

Explanation:

The balanced for the reaction is:

2KI + Pb(NO₃)₂ → Pbl₂ + 2KNO₃

When the equation is balanced, the number of atoms for each element on both the reactant and product sides of the equation are equal. This can be seen below:

      Reactant   Product

K         2                 2

I          2                  2

Pb      1                    1

N       2                   2

O       6                  6

Help me pls I will mark you as brain

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Answer:Infection with a pathogen does not necessarily lead to disease. Infection occurs when viruses, bacteria, or other microbes enter your body and begin to multiply. Disease occurs when the cells in your body are damaged as a result of infection and signs and symptoms of an illness appear.

Explanation:

I believe Epidemology because it is the branch of medicine which deals with the incidence, distribution, and possible control of diseases and other factors relating to health. This relates to finding diseases in places like those.

Can someone help me to write the ionic equation :((

Answers

Answer:

Here use this to help you

Explanation:

How do two hydrogen atoms bond to form a molecule?

1 each hydrogen atom shares an electron to form a covalent bond

2 each hydrogen atom transfers an electron to form an ionic bond

Answers

Answer:

1: each hydrogen atom shares an electron to form a covalent bond

Explanation:

I took the quiz and this was correct!

I need help pleaseee!!!!!!!! Fast

Answers

Answer:

C.) 1700 Pa

Explanation:

300 k - 0.3 m^3 = 17000

Is this statement true or false?

The products of a chemical reaction have the same properties as the reactants.


true

false

Answers

It’s false!

Hope this helps ❤️

Answer:

The answer is B. False

Explanation:

If you have 24.19 moles of nickel, how many atoms do you have?

Answers

Answer:

No idea

Explanation:

I'll tell u how to do it. You multiply by amidagros number. that is how many atoms you have. Your welcome.

a motorcycle travels 95.0 km/hr. how many seconds will it take the motorcycle to cover 2.70*10^3 m?

Answers

Answer:
102.35s

Explanation:
Do we currently have km/hr, yet the question is asking for m/s
To convert, we just multiply (95km/1hr) by (1000m/1km) and (1hr/3600s)
This effectively converts km/hr to m/s
This will give us 26.38m/s
Then we must divide (2.7*10^3m) by 26.38m/s
This cancels out the meters and leaves us with seconds:
2700/26.38 = 102.35 seconds

how many sets of lone pairs are around sulfur in sf4?

Answers

Answer:

One Lone Pair. (I think)

Explanation:

What gas is dissolved into soft drinks such as soda which causes them to bubble when opened? A. Carbon dioxide B. Ethylene C. Hydrogen D. Argon​

Answers

Answer: A, Carbon Dioxide

Explanation:

A. Soda water, like other carbonated beverages, contains carbon dioxide that has dissolved under pressure. When the pressure is released by opening the soda container, the liquid cannot hold as much carbon dioxide, so the excess bubbles out of the solution.

Answer:

A. carbon dioxide

Explanation:

the answer is A

The correct answer is "Greater at 72 °F " hope it helps

Answers

Is this supposed to be a question or did you mean to answer a question?

whats a ring of fire

Answers

fire in a circle

Explanation:

bc

What is the scientific method webquest answers?

Answers

A method of procedure that has characterized natural sciences the 17th century, consisting in systematic observation, measurement, and experiments, and the formulation, testing, and modification of hypotheses.

What does potential and kinetic energy have in common

Answers

The only things that come in mind are they are both forms of energy that have something to do with movement. Kind of a smart alike response but I hope it helps.

I will brainless who can answer this all pleaseeeeej​

Answers

Answer:

False, True, True, False, False, not sure, True, False, True, True

here u go

label the particles, charges, & mass for Elements: 6, 8 & 10?

Answers

Answer:

charges, & mass

Explanation:

Someone pls help me I will make you brain

Answers

Answer:

C. negative global warming

PLEASE HELP!!
Which element in Fe(NO3) is a metal?
O
N
Fe

Answers

Answer:

Explanation:

Most periodic tables have a staircase thick line on their right side. This line separates the metals from the non metals.

O (oxygen) and N (nitrogen) are on the right side of the staircase.

Fe is on the left.

Those elements on the right side of the staircase are non metals.

Those elements on the left of the staircase are metals, so Fe is a metal.

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