What is Protein coat

Answer:1) 9,5 грамм

2) 1,8 л вроде

Explanation:

1) H2+F2=2HF

n(H2)=1 моль. n(F2)=1моль

M(H2)=1г/моль. М(F2)= 19г/моль

0,5:1=х:19.

2) H2S+2NaOH=2H2O+Na2S

M(H2S)= 34г/моль. М(NaOH) =40г/моль

5,6:80=х:34. m(H2S)= 2,38г.

n(H2S)= 2,38:34≈0,08

V=Vm•n= 22,4 • 0,08=1,8

Answer:

0.04567

Explanation:

Answer:

1.An initial observation is the measurement that you take before you start any process that might cause a change. When you compare your subsequent observations with the initial one, you will see whether any change has taken place, and you will be able to measure the change.

Explanation:

D ko po alam yung iba

Answer:

3 2 4 5 1

Explanation:

The position of an element on the periodic table depends on its chemical properties.

The periodic table is an arrangement of elements in groups an periods. The elements in the same group are chemically similar while the elements that are in the same period only have the same number of shells.

The question is  incomplete as the required charts are not shown. However, the position of an element on the periodic table depends on its chemical properties.

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Answer:

a series of reactions in which particles from one reaction trigger the next reaction

Explanation:

cause thats a chain

Answer:

Explanation:

There are 6 32S atoms and 2 36S atoms

Their respective contributions to the average aomic mass is (6*32)=192, and (2*36)=72.  Added together, this makes 264 total.  Divide by the total number of atoms, 8.  (264/8) = 33.00

The weighted atomic mass of these S atoms is 33.00 amu (atomic mass units)

because of its milk-like appearance. ... Since the dissociation of this small amount of dissolved magnesium hydroxide is complete, magnesium hydroxide is considered a strong electrolyte. Its low solubility makes it a weak base.

Answer:

Question 1:

• In A, the main carbon has four bonds [two double bonds ] i.e; (=C=) hence it cannot allow any incoming electron. This makes it thermodynamically stable because it's reactivity carbon is fully bonded.

In B, the main carbon has only three bonds i.e;

(=C–) hence it will allow only one pair of incoming electrons hence reaction taking place.

Question 2:

Note: Any halo-alkane or alkyl-halide such as methyl iodide, methyl chloride, ethyl bromide are reagents used to add alkyl groups to amide molecules.

• So, Methyl Iodide will not react with C because C lacks an amide or nitrile group. To add an alkyl group to C, we shall use potassium hydroxide and any alcohol in presence of dry ether at room temperature.

• Methyl Iodide will react with D because D has an amide group which is electron efficient hence reaction will take place so easily.

Question 3

Note: Nucleophiles are electron donating molecules.

Electrophiles are electron recipients.

• F will react with nucleophiles because F has a carbonyl group i.e; (–HC=O ) which is an electron recipient. But this occurs after the oxygen atom reacting with an hydroxide to form an oxide.

E will not react, because the main carbon has a double bond which are nucleophiles.

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Answer:

(a) (i) All the elements of a group have similar chemical properties because they have the same no. of valence electrons in their outermost shell. (ii) All the elements of a period have different chemical properties because they have different no. of valence electrons in their atoms.

Recall f=ma

f = 2 x 2 = 4N

The amount of force is 4N

Answer: 0.337 mol Ca

Explanation: 13.5 g Ca ÷ (40.1 g/mol Ca) =

Answer:

13.5/40+0.3375

Explanation:

Answer:

A IS DISPLACEMENT

B IS VOLUME

C IS DENSITY

D IS MASS

Answer: 28. A

26. E

23. C

Explanation:

Only know a couple sorry

Answer:

a potential energy decreases, kinetic energy does not change b potential energy decreases, kinetic energy decreases c potential energy increases, kinetic energy does not change d potential energy decreases, kinetic energy increases e potential energy does not change, kinetic energy decreases f potential energy increases, kinetic energy decreases g potential energy increases, kinetic energy increases h potential energy does not change, kinetic energy increases

Explanation:

Answer:

This is true. Each element has a specific number of protons in the nucleus. This also means the electrons of that usually element are the same.

Explanation:

The given statement exists true. The number of protons in each element varies. The number of protons in the nuclei of any one of an element's atoms is the element's atomic number. The mass number of an atom is the sum of the protons and neutrons in the atom.

The atomic number of an atom refers to how many protons it contains (Z). This number is crucial because it is exclusive to the atoms of a particular element. Every element has a different number of protons in its atoms, but every element has the same number of protons in all of its atoms.

Atoms with a specific number of protons in their nuclei—known as the atomic number—are what make up a chemical element. The number of neutrons in an element's atoms can vary; atoms with different numbers of neutrons are referred to as the element's different isotopes.

Every element contains a different number of protons. The atomic number of an element is the total number of protons in all of its atoms. An atom's mass number is calculated by adding its protons and neutrons.

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It's called "competition"

Answer:

c = λ f

c is the speed of light, λ the wavelength in meters, and f equals the frequency in cycles per second.

Explanation:

Answer:

carbon dioxide gas

Explanation:

carbon dioxide gas is an element which forms and oxide that is a reactant in photosynthesis.

Answer:

Carbon dioxide

Explanation:

Explanation:

Assuming that pressure is equal to

1 atm

, boiling water at its boiling point implies providing it with enough heat to turn it from liquid at

100

∘

C

to vapor at

100

∘

C

.

The amount of heat needed to allow one mole of water to undergo this phase change is called the enthalpy chnge of vaporization,

Δ

H

vap .For water at

100

∘

C

, the enthalpy change of vaporization is equal to

Δ

H

vap

40.66 kJ/mol

1.003

3.441

2 O

first

third

Answer:

At 22°N, a low-velocity zone is exposed at depths of 20–200 km beneath the Manila Accretionary Prism, which could be the boundary between subduction in the south and collision in the north

Answer:

tae nimo par and thankyou

Explanation:

i hope its help

Answer:

A. 4s subshell.

B. An element with the valence electron configuration 2s² 2p⁵ would form a monatomic ion with a charge of -1.

In order to form this ion, the element will gain 1 electron into the 2p subshell

A) The element with 4s² configuration form a monatomic ion with a charge of  +2 and the element will lose electrons from the 4s subshell.

B) The element with 2s²2p⁴ configuration form a monatomic ion with a charge of  -2 and the element will gain electrons into the 2p subshell.

Valence electrons are the electrons occupying the outermost shell of an atom while the electrons in the inner shell are called core electrons. Lewis structures are helpful to determine the number of valence electrons and knowing the types of bonds.

Valence electrons are filled in different shells and these electrons are caused interaction between atoms and lead to the formation of chemical bonds.

Only electrons present in the outermost shell can contribute to the formation of a chemical bond or a molecule and decide the reactivity of the element.

The element with a 4s² configuration forms a monatomic ion as it loses both electrons present in the 4s subshell.  This will lead to a charge of  +2 on the element and the element from a monoatomic ion with +2 charge.

The element with 2s²2p⁴ configuration will accept two electrons into the 2p subshell. So that it can get the nearest noble gas configuration and it will form a monoatomic ion with -2 charge.

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Answer:

Explanation:

The only way to know for sure if a chemical reaction has occurred is to identity that a new compound has been formed. There are signs

we can look for that help to determine if a chemical reaction has occurred. One sign of a chemical reaction is the formation of a gas

observed as bubbling, flezing, or foaming.

Some chemical reactions, like the burning of wood, result in the production of heat or light energy.

A change in temperature either an increase or decrease, can indicate that a chemical reaction has occurred.

The formation of a precipitate is another sign of a chemical reaction. A

precipitate is a solid substance that separates from a solution.

A change in color such as we see in the rusting of a bike chain, is the final sign that a chemical reaction has occurred. If one or more of these signs is

presnt, a chemical reaction has occurred

Answer:

(C) Should Be The Answer

Explanation:

Answer:

Here's a pretty short answer :D

Explanation:

Solids have definite volume and shape, liquids have definite volume but take the shape of their containers unlike solids. Gases don't have definite shape or volume, and plasma is somewhat gas because its particles are far apart from each other - but - gases are electrically neutral while plasma has a charge.

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Hope this helped! :3