What’s the molecule for Snl2 formula?

The correct answer is C. ΔHθf

We define the standard enthalpy of formation as the enthalpy change when one mole of a substance is formed from its elements under standard conditions. The standard conditions are 1 atm pressure, 273 K temperature and 1 M concentration.

The standard enthalpy of formation is denoted using the symbol ΔHθf.

Hence, ΔHθf is the enthalpy change when 1 mole of a substance is formed from its elements under standard conditions.

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Answer:

d

Explanation:

Answer:

higher than 59 c because dipole- dipole interactions in iodine monocholoride are stronger than dispersion forces in bromine

The boiling point is the temperature at which the pressure of the liquid is equal to the vapor pressure. The b.p of iodine monochloride will be higher than 59 °C because dipole-dipole interactions are stronger. Thus, option C is correct.

A dipole-dipole interaction is the type of electrostatic attractive force that exists between the positive and the negative side of the polar molecule. They are strong interactions between polar molecules.

The Iodine monochloride (ICl) has a higher boiling point as compared to bromine as the former is a polar molecule with a dipole-dipole bond. The bromine shows the dispersion forces that are the weakest forces.

The polar molecules have differences in their electronegativities that make them have strong dipole interactions. As a result, will need higher temperatures to break bonds.

Therefore, option C. ICl will need a higher boiling temperature than bromine due to the presence of strong dipole forces.

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Answer:

RAM

[tex]RAM = (mass \: of \: ^{28} Si \: \times \%abundance) + (mass \: of \: ^{30} Si \: \times \%abundance) \\ RAM = (28 \times 90\%) + (30 \times 10\%) \\ RAM = 25.2 + 3 \\ RAM = 28.2[/tex]

Answer:

Pi to 5 decimals is 3.14159-

Brainlist pls!

P.S. It's a repeating number, but you can just put a (-), so that you don't have to type the whole thing out.

Answer:

sorry raaz report mat kerna

points collect kr rehe hai

Explanation:

kind of ion formed (anion or cation) and the size of the ionic charge. ... O-‐2 oxide. S-‐2 sulfide. N-‐3 nitride. P-‐3 phosphide. Table 3.1. Common, simple anions. It is critically important that you distinguish between ...

Ions and Ionic Compounds – Introductory Chemistry – 1st Canadian Edition - BC Open Textbooks

opentextbc.ca › chapter › ions-and-ionic-...

The formula Na 2Cl 2 also has balanced charges, but the convention is to use the lowest ratio of ions, which ... For the ionic compound between magnesium cations (Mg 2+) and oxide anions (O 2−), again we need only ...

[PDF] Tutorial 2 FORMULAS, PERCENTAGE COMPOSITION, AND THE MOLE FORMULAS: A chemical formula shows the elemental composition of a sub

www.eiu.edu › eiuchem › forms › t...

Ba2+ barium. HSO3. – hydrogen sulfite. MnO4. – permanganate. Al3+ aluminum. SO4. 2– sulfate. NO2. – nitrite. Sn2+ tin(II). HSO4. – hydrogen sulfate. NO3. – nitrate. Sn4+ tin(IV). S2O3. 2– thiosulfate. OH– hydroxide.

Symbols and Charges for Monoatomic Ions

www.edu.xunta.es › portal › Nomenclature

Cs+ cesium ion O2- oxide. Be2+ beryllium ion S2- sulfide. Mg2+ magnesium ion Se2- ... one K+ and one Cl¯ are required. The resulting formula is KCl. Example 3: Write the formula from the following name: barium

Barium chloride salts has a 3 to 2 ratio of cations to anions. thus option C is correct.

Barium Chloride an inorganic salt which is composed up of barium cations (Ba2+) and chloride anions (Cl–), otherwise named as  Barium Muriate or Barium dichloride.

It is a white solid , water-soluble, hygroscopic and gives a slight yellow-green color to a flame,  extensively used in the industry mainly The sulfate is used in white paints where as Barium chloride is poisonous in nature.

It is soluble in water which dissociate into barium cations and chloride anions in its dissolved state, However, the solubility of this compound in water is temperature-dependent.

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Answer:

No observable change, unless dry hydrogen Chloride reacted in presence of a peroxide (ROOR)

Answer:

There are two aluminum ions and three sulfate ions; or two aluminum, three sulfur, and twelve oxygen atoms.

Explanation:

In 5 molecules of Al₂( SO₄ ) there are 20 oxygen atoms are present. In  one molecule of aluminum sulphate there are 4 oxygen atoms present and in 5 molecules of  Al₂( SO₄ )  20 oxygen atoms present.

According to the environment, the word may or may not include ions that meet this requirement. A molecule is a collection of two or more atoms bound together by the attractive forces known as chemical bonds.

There are three different kinds of molecules: atom-sized molecules, element-sized molecules, and compound-sized molecules.

A molecule is the smallest unit of any material that is composed of one or more elements and is capable of existing independently while maintaining all the substance's physical and chemical characteristics. Further atom division occurs within molecules.

Thus, In 5 molecules of Al₂( SO₄ ) there are 20 oxygen atoms are present.

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Answer:

Nobel Gases will have a full p valance shell aswell as a s subshell

Explanation:

The type of reaction of Fe2O3 + 2SiO2 → Fe2Si2O7 would be that it is a synthesis reaction. It is a type of chemical reaction in which two or more simple substances combine to form a more complex product.

Answer:

The type of reaction of Fe2O3 + 2SiO2 → Fe2Si2O7 would be that it is a synthesis reaction. It is a type of chemical reaction in which two or more simple substances combine to form a more complex product. Hope this answers the question. 

Explanation:

Answer: B. Whole continents can move

Explanation:

Answer:the answer is b Whole Contenints can move

Explanation:took the test and got it right

Dehydration can lead to a loss of strength and stamina. It's a main cause of heat exhaustion. You should be able to reverse dehydration at this stage by drinking more fluids. If dehydration is ongoing (chronic), it can affect your kidney function and increase the risk of kidney stones.

[I copied this from the internet, but hope this helps!]

Answer:

oxygen and Hydrogen

Explanation:

Oxygen and Hydrogen causes rusting on metals after combining with moisture

Answer:

20.7g/mol

Explanation:

Answer:

The Bond would Be ionic

Explanation:

Thier electronegativites are way to differnt so Sulfur would steal from Sodium

Answer:

A. Kinetic energy

Explanation:

Kinetic energy is stored in the bonds between atoms.

Answer:

Explanation:

Sn(WC)2

if it is tungsten carbide this should be correct but there are many versions of carbide

Sn(MC2)2

could also be possible

the 2 next to MC should be a subscript

Answer:Newton's law also states that the strength of gravity between any two objects depends on two factors: the masses of the objects and the distance between them.

Objects with greater mass have a stronger force of gravity between them. ...

Objects that are closer together have a stronger force of gravity between them.

Explanation:

hope it helps

Answer:

masses

Explanation:

Answer:

2FeBr₃   +    3Na₂S  →   Fe₂S₃  +  6NaBr

Explanation:

The expression to be balanced is given as:

        FeBr₃   +    Na₂S  →   Fe₂S₃  +  NaBr

To balanced this chemical equation, we can use a simple mathematical approach.

Simply use the alphabets a, b, c and d to represent the numbers that will make the equation balanced;

        aFeBr₃   +    bNa₂S  →   cFe₂S₃  +  dNaBr

Conserving Fe;

                   a  = 2c

Conserving Br;

                    3a  = d

Conserving Na;

                    2b = d

Conserving S;

                    b = 3c

Let a  = 1,      b  = [tex]\frac{3}{2}[/tex]

      c  = [tex]\frac{1}{2}[/tex]      d = 3

 Multiply through by 2 to get whole number ratios;

        a  = 2, b  = 3 , c = 1 and d = 6

          2FeBr₃   +    3Na₂S  →   Fe₂S₃  +  6NaBr

Answer:

C

Explanation:

The statement which is true about non-metal elements is as follows:

Thus, the correct option for this question is C.

Non-metals may be defined as those chemical elements that significantly lack the attributes of metals. They generally range from colorless gases to shiny and high melting point solids. Some examples of non-metals include boron, carbon, nitrogen, etc.

Non-metals are not stronger than metals because the arrangement of bonds in metals is highly compacted. Non-metals are very frequently utilized in the manufacture of computers, laptops, and other electronic devices along with metals. But most of the time non-metals are cheaper to synthesize.

Therefore, non-metal elements are sometimes cheaper to make is a statement that is true about non-metal elements. Thus, the correct option for this question is C.

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The weather phenomenon that most likely causes periodic cold is:

This is caused by the:

In the Southern United States, there is a weather phenomenon which occurs when there is only a periodic occasion of severe cold. This happens because of what is called La Nina that occurs as a result of the movement of the jet stream.

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The question is incomplete, the complete question is;

Dr. Murray's science class recently read about an experiment that had surprising results. They decided to perform the experiment in their class, but they used more advanced methods. Their results

must be completely different, but they are more reliable.

could be the same as before, or they could be completely different.

must be the same as the recorded results, but they are more reliable.

could be the same as the recorded results, or they must be inconclusive.

Answer:

could be the same as before, or they could be completely different.

Explanation:

Now we know that in carrying out a scientific research, there is such a thing as replication.

Replication means that other scientists in other places carry out the same experiments previously done and expect to obtain the same results as the first time the experiment was done.

However, this is not a case of replication because a different and more advanced method was used in the experiment. Once the methodology of the experiment has been changed, then the results could be the same or different. Hence the answer above.

Answer:

Explanation:

i hope it helps :)

Answer:

1s2 2s2 2p6 3s2 3p4

Explanation:

below

The molarity = 0.04 M

The volume = 6.25 ml

Given

25cm³ of 0.1 M H₂SO₄

1.06g Na₂CO₃ in  250cm³ of solution

Required

the molarity and the volume of Na₂CO₃

Solution

Molarity of  Na₂CO₃ :

[tex]\tt \dfrac{1.06/106~mol}{0.25~L}=0.04~M[/tex]

Reaction

H₂SO₄ + Na₂CO₃ ⇒Na₂SO₄ + H₂O + CO₂

mol H₂SO₄ = 25 x 0.1 = 0.25 mlmol= 2.5 x 10⁻⁴ moles of  Na₂CO₃

The volume of solution used :

[tex]\tt V=\dfrac{n}{M}=\dfrac{2.5.10^{-4}}{0.04}=6.25.10^{-3}~L=6.25~ml[/tex]

Answer:

a. Are made of more than one cell.

Explanation:

I majored in Chemistry

Answer:

a. Are made of more than one cell.

Explanation:

Explanation:

as alcohol evaporates at much faster rate compared with water due to its lower boiling temperature (82 compared to 100 degree Celsius), it is able to carry away more heat from the skin. this means for a given amount of time much more alcohol evaporates than water.

hope it helps you

Answer:

I would say B

Explanation:

If I'm wrong I apologize, have a good day

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[tex] \blue{The \: correct \: answer \: is \: (C).}[/tex]

Answer:

Trends on the Periodic Table have a vertical component and a horizontal component. Vertical trend: as more “shells” are added to the electron cloud, it expands. Horizontal trend: if atoms have the same number of “shells”, atoms with more protons will draw the electron cloud in tighter.

Explanation: