Hòa tan hoàn toàn 1,93 gam hỗn hợp 2 kim loại Fe và Al vào dd HCl dư, sau phản ứng thu được m gam muối và 1,456 lít khí H2 ở đktc. Giá trị của m là:

Answers

Answer 1

Answer:

Sorry pal! Didn't understand your language.  

:(

Explanation:


Related Questions

The nucleus’ pull on its electrons, taking into account any attractions weakened by shielding is called the:

Answers

Answer:

It's called the shielding effect

Explanation:

It describes the decrease in attraction between an electron and the nucleus in any atom with more than one electron shell. (I hope this helps)

The attraction pull of the nucleus on its electron weakened by the shielding of the inner shell electron is called the shielding effect.

What is the shielding effect?

The shielding effect is the valence electrons are shielded from the attraction toward the nucleus of an atom. The shielding effect is the resistance offered by the inner shell electrons to the attraction of the valence electrons toward the nucleus.

This effect increases down the group in the periodic table as the atomic radii also increase and remains the same in the period. This effect is generated by the electrons present in the middle of the nucleus and valence electrons act as shields that repel those outer electrons.

Therefore, the effective nuclear charge acting on the valence electrons decreases. More shielding effect causes less electronegativity of an atom. The shielding effect describes how easily the electron can be removed from the atom making it more reactive.

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What are the factors affecting chemical reaction??? 4 points. ​

Answers

Answer:

Surface areaTemperature Concentration Amount of catalyst used

Is chlorine a substance or a mixture

Answers

Answer:

its a substance

Explanation:

convert 1 bromopropane to bromoethane.​

Answers

Answer:

The Dehydrohaogenation of 1-bromo propane with alcoholic KOH gives propene which on again hydrohalogenation with HBr gives 2-bromo propane due to Markonikove's rule for addition.

Explanation:

Someone pls help me I will make you brain

Answers

Answer:

A

Explanation:

I talked about it in Economic Geography and Earth Science, I rememBer this

How much heat is needed to raise the temperature of 100g of an iron from 25°C to
110°C?
(The specific heat of iron is 0.45 J/g∙°C).

Answers

Answer:

382.5J

Explanation:

Use the formula:

E = mcΔθ or Q = mcΔT

m = 100g

c = 0.45 J/g°C

ΔT or Δθ = 110 - 25 = 85°

Sub in the values:

E = 100 × 0.45 × 85

= 382.5J

Use the following image to answer the following questions. A student was performing an experiment using two identical cups made of styrofoam. The student had Cup A holding water at 90℃ and Cup B holding water at 20℃. The student then put an Aluminum Bar into each cup that was touching the water. As time passed, the student noticed that the temperature of the water in Cup A and Cup B began to change. Question:
A. Predict what will happen to the temperature of the water in Cup A and Cup B after 1 hour has passed.
B. Explain and give evidence for what type of heat transfer is occurring between the 2 cups.

Whoever answers my question gets brainliest

Answers

Answer:

The water will eventually become the same temature (A)

I need help pleaseeee

Answers

I believe its rocket 3 because the mass is bigger causing it to slow down when launched vs how it would launch if it weighed lighter please mark me brainliest hope it helps

pleasssse help!

According to the ideal gas law, which will occupy a larger volume - 100 g of helium or 100 g of oxygen, if both are at the same temperature and pressure.​

Answers

Answer:

Helium

Explanation:

The pressure of He gas would be greater than that of O2 gas

When baking soda and vinegar react bubbles are produced. What mostly occurred?

Answers

Answer:

a chemical reaction

Explanation:

Answer:

When vinegar comes in contact with baking soda, a cascade of two chemical reactions takes place. The result is carbon dioxide gas—a product of the reactions—bubbling up in a water solution. The bubbles create the fizz and sizzling sound.Baking soda is bicarbonate (NaHCO3) and vinegar is acetic acid (HCH3COO). One of the products this reaction creates is carbon dioxide, which makes the bubbles. When the baking soda meets the vinegar, there is a chemical reaction as carbon dioxide gas is created and fills the balloon causing it to inflate.

Hope you have an amazing day!

2. DEFINE CHEMICAL BOND IN YOUR OWN WORDS.

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Answer:

chemical bond are bonds that are strong lasing between chemicals and irons and morecles

Inside the box is a list of endangered animals in the Philippines. Group the animals in three ways and make a diagram of your groupings in the space below.

Answers

The middle row! Im sure this would be correct! (please mark this brainly)

Ionic bonds form between which two types of elements?​

Answers

Answer:

Ionic bonds usually occur between metal and nonmetal ions. For example, sodium (Na), a metal, and chloride (Cl), a nonmetal, form an ionic bond to make NaCl.

Explanation:

Answer:

metal and nonmetal ions

Explanation:

How do you know where something fits on the electromagnetic spectrum? I currently have the Hz but do I need to convert that into something else?

Answers

Answer:

can oxygen exist as a liquid and solid

Someone pls help me I will make you brain

Answers

Answer:

It is true answer. Ozone = O3

Explain the formation of planets based on our knowledge of the solar system

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Planets form from particles in a disk of gas and dust, colliding and sticking together as they orbit the star. The planets nearest to the star tend to be rockier because the star's wind blows away their gases and because they are made of heavier materials attracted by the star's gravity.

A mixture of neon and argon gases exerts a total pressure of 2.39 atm. The partial pressure of the neon alone is 1.84 atm, What is the partial pressure of the argon?

Answers

Answer:

0.55 atm

Explanation:

According to Dalton's law of partial pressures,

The total pressure is the summation of the partial pressures of individual gases in a sample of non-reactive gases.

Since Neon and Argon are noble gases, they do not react with each other. So we can apply Dalton's partial pressure law.

P total = P Ar + P Ne

2.39 atm = P Ar+ 1.84 atm

P Ar = 2.39 atm - 1.84 atm

       = 0.55 atm

According to the Dalton's law of partial  pressure the partial pressure of the argon is 0.55 atm.

What is pressure?

Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.

There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .

It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.

In this case, pressure of gas argon is obtained by subtracting pressure of gas neon  from the total pressure ,that is 2.39-1.84=0.55 atmosphere.

Thus ,the partial pressure of gas  argon in atmosphere is 0.55 atmosphere.

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How many Atoms are in H2COCH? Need asap pleassseee!

Answers

There is a total of 12, wish you luckkkkkkkk

True or false

9.Circuit breaker is used to protect the user of appliance from an electrical shock.

10.Earthing or Grounding involves attaching to the ground a conductor in one line of the circuit to make that line electrically common with the earth. *​

Answers

Answer:

1. true

2. false

Explanation:

PROMISE PROMISE to make the most of the su in the WORLD CUP and chemica are u doing the meetings with

What is the reaction type
2 Mgl2+ Mn(SO3)2 → 2 MgSO3 + Mnl4

Answers

Answer:

The reaction type is double displacement

what are the important features about earth plates

Answers

Deep ocean trenches, volcanoes, island arcs, submarine mountain ranges, and fault lines are examples of features that can form along plate tectonic boundaries.Because of the plates there are many things that is being made with the plates, but without the plates that makes earthquakes there wouldn't be any mountains,volcanoes, islands, fault lines, etc.For example, the San Andreas Fault couldn't have been made if it weren't for the plates.

Hope this helps! =D

Deep ocean and all of that
Thanks have nice day

help pls now now now

Answers

5- perfume sprayed in the air

6- I'm really sorry but I'm not sure

Cual es el número maximo de electrones en el subnivel 4s

Answers

Answer:

Translated < what is the maximum number of electrons in the sublevel 4s?

answer 32 electrons

why does it smell like burning when i turn my heat on?

Answers

Answer:

your lightbulb is mot likely burnt out

Explanation:

Which of the following has electrons in a d orbital?
Mg
Si
Cr
Са

Answers

Cr.
Cr is the only element listed that is located in the d-block of the periodic table.

Ill give brainlest to the one who answers right.

Answers

the answer would be h2o

Helppppp I need it ASAP

Answers

Question 6
a) B
b) A

Question 7
a) Iron
b) oxygen, water
c) i) Galvanizing
ii) Painting

Potassium and bromine combine to make KBr. What is the name of this compound?

potassium bromine
potassium bromide
bromine potassium
bromine potassiumide

Answers

i believe the answer is potassium bromide

is a skateboard matter or no matter​

Answers

Answer:

it is matter cus everything is made up of matter

Explanation:

Answer: yes

Explanation:

Matter makes up everything

Where is a mid-ocean ridge exposed above sea level?

Question 11 options:

Himalaya Mountains


Mariana Trench


The Big Island of Hawaii


Iceland

Answers

Answer:

ice land should be it

Explanation:

Answer:

Iceland is the answer.

Explanation:

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