17.Which of the following is the correct formula for the compound formed from the elements beryllium and oxygen?Select one:a. BeOb. Be2O2c. BeO3d. Be4O8

ANSWER

STEP-BY-STEP EXPLANATION:

You are given the below expression from the question provided

The words in this excerpt which support the idea that the husband was very devoted to his wife is "the husband knew it was wrong".

An excerpt is described as a short extract from a film, broadcast, or piece of music or writing.

From the excerpt above, we can conclude that the husband was devoted to his wife by digging up the roots of the tree for his wife even when he knew it was wrong to do do and so he broke a hole in the floor of the Sky-World, and was shocked to find empty space underneath.

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If we given a compound such as K₂SO₄, this compound would be named as such that the metal comes first, followed by the anion or non-metal and lastly roman numeral of the valence number.

So in naming this compound, we would go as

Potassium tetraoxosulphate (VI)

Where potassium is the metal, tetraoxosulphate is the anion and lastly the roman number of the valence electron.

Another example would would be MgCl₂

The name of this compound is magnesium chloride.

In this compound, the metal is named first as well, followed by the non-metal. The roman numeral of the valence electron is not written here because the value is 1 and we don't need to write it.

Another example of the above is CaBr

This compound is calcium bromide

The metal is named first and then the non-metal. The roman numeral of the valence number is not written becaue it is also 1.

Lastly example would be NaNO₃

This compound is named as sodium trioxonitrite(v)

The metal is also named first, followed by the anion and lastly the roman numeral of the valence number.

From the explanation above, the answer to this question is The Metal

The best way for Jonas to make sure the pot roast is safely prepared is Freeze the pot roast until he is ready to prepare it Friday night

Pot roast is the browned meat cooked with the vegetable in a covered pot

So according to the given data while grocery shopping on a Sunday afternoon, jonas sees a pot roast that has been marked down the pot roast has an expiration date set for Tuesday, but Jonas wants to host dinner for friends on Friday night then the best way for Jonas to make sure the pot roast is safely prepared is Freeze the pot roast until he is ready to prepare it Friday night because he wants to host dinner for friends on Friday night then he bought earlier then it would be spoiled because is is a meat that's why the correct option is C bought the pot roast and freeze it until Friday night and when he want then make it

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Using the ions, the formulas and give the names for 5 possible ionic compounds involving these ions are :

1) Rubidium hydride - RbH

2) Iron(II)chloride - FeCl₂

3) Aluminum chloride - AlCl₃

4) Rubidium oxide - Rb₂O

5) Iron(II)oxide - FeO

1) Rubidium hydride - RbH

In Rubidium hydride : Rubidium forms Rb⁺ ion. hydrogen form H⁻ ion. they combined and form ionic compound. The one positive charge on rubidium neutralizes the one negative on hydrogen.

2)  Iron(II)chloride - FeCl₂

In iron(II)chloride :  iron form Fe⁺² and Chlorine form Cl⁻ ion. +2 charge are neutralizes by the two chlorine negative ion.

3) Aluminum chloride - AlCl₃

In this Aluminum form Al³⁺  and chlorine forms Cl⁻ and form ionic compound, Aluminum chloride.

4) Rubidium oxide - Rb₂O

In Rubidium oxide : Rubidium for Rb⁺ and oxygen form O²⁻.

5) Iron(II)oxide - FeO

In the ionic compound iron(II)oxide : Iron forms Fe²⁺ ion and oxygen forms O²⁻ ion.

Thus, Using the ions, the formulas and give the names for 5 possible ionic compounds involving these ions are :

1) Rubidium hydride - RbH

2) Iron(II)chloride - FeCl₂

3) Aluminum chloride - AlCl₃

4) Rubidium oxide - Rb₂O

5) Iron(II)oxide - FeO

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The uncertainty in the velocity of the car is 7.85×10⁻³¹

Velocity is the directional speed of an object n motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time

Here given data is

Mass of automobiles = 2190 lb = 993.26kg

Speed of car = v = 85.5 mph = 38.2 m/s

Uncertainty in the position of car = Δx =  5 f = 1.52m

the uncertainty in the velocity of the car is determined by heinsberg uncertainty principle

ΔPΔx ≥ h/4π

mΔvΔx ≥ h/4π

Δv ≥ h/4π×mΔx

Δv ≥ 6.626×10⁻³⁴/4π× 993.26kg× 1.52m

Δv ≥ 7.85×10⁻³¹

The uncertainty in the velocity of the car is 7.85×10⁻³¹

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The first step is to use the molecular weight of HCl to convert 145g to moles of HCl (mw=36.458g/mol):

Now, use the ratio of the coefficients of MnCl2 to HCl, to find how many moles of MnCl2 are produced with this amount of HCl:

Use the molecular weight of MnCl2 to convert the amount of moles produced to grams:

124.9g of MnCl2 are produced.

123.33mol/L

The formula for calculating the molarity of a solution is expressed as:

Given the following parameters

• Moles, of sucrose (solute) = 0.148 moles

• Litres ,of solution = 0.0012L

Substitute the given parameters into the formula;

Therefore the molarity of this solution is 123.33mol/L.

The final or new concentration of a solution that was diluted to 300mL is 1.25M.

The final concentration or molarity of a solution can be calculated using the following formula;

CaVa = CbVb

Where;

According to this question, 2.5 M solution has an initial volume of 150.0 mL. The solution is diluted to a final volume of 300.0 mL. The final concentration can be calculated as follows:

2.5 × 150 = Cb × 300

375 = 300Cb

Cb = 1.25M

Therefore, the 1.25M is the new concentration of the solution.

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The answer is 6.5x10^5

Coefficient = 6.5

Exponent = 5

The mass of aluminum used if 0.1 moles of aluminum chloride is produced by aluminum chloride reaction is 13.33 g.

given that :

number of moles of aluminum chloride = 0.1 moles

The balanced chemical reaction as:

2Al  +    3Cl₂    ----->   2AlCl₃

2 moles of moles of AlCl₃ produced by 2 moles of Al

therefor 0.1 moles of AlCl₃ produced by 0.1 moles of Al

number of moles of Al = 0.1 mol

Mass of Al = number of moles × molar mass

                 = 0.1 × 133.34 g/ mol

                  = 13.33 g

Thus, The mass of aluminum used if 0.1 moles of aluminum chloride is produced by aluminum chloride reaction is 13.33 g.

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Explanation:

To balance the equation, we need to have the same number of atoms of each element on both sides of the equation.

So in this case:

4KCIO3 → 3KCIO4 + KCI

where:

reactants:

K - 4

Cl - 4

O - 12

Products:

K - 4

Cl - 4

O - 12

Potassium chloride is KCl and potassium chlorate is KClO3. The balanced reaction equation tells us that:

4 mol of KClO3 produces 1 mol of KCl, we know it because of the equation:

4 KCIO3 → 3 KCIO4 + 1 KCI

So we can do a rule of 3 to find out the quantity in moles produced when we have 3.90 moles of KClO3:

4 mol KClO3 --- 1 mol KCl

3.9 moles KClO3 --- x

4x = 1*3.9

x = 3.9/4

x = 0.975 moles

Answer: 4 KCIO3 → 3 KCIO4 + KCI and 0.975 moles.

Firstly what you need to know is that metallic bonds form in metallic substances. The elements that form these bonds are found on the left of the periodic table. So the metallic bonds form when the charge when the charge is spread over a wide distance when comparing to the size of the atom. These bonds occur between metals like zinc, and since they are in a form of solids, their atoms are tightly packed together.

The formation of metallic bonds occur because the metals exchange electrons, this electron exchange occur in different spatial directions.

Step 1

It is known that a value of "x" % (m/m) means:

"x" grams in 100 grams of solution

-------------

Step 2

Information provided:

3.9 % (m/m) of NaCl solution

-------------

Step 3

Procedure:

According to step 1, it is known that:

3.9 % (m/m) => 3.9 g NaCl in 100 g

--

Now,

3.9 g NaCl ------------ 100 g of solution

7.20 NaCl ------------- X

X = 7.20 NaCl x 100 g of solution/3.9 g NaCl

X = 184.61 g = 180 g approx.

Answer: 180 g of solution

In a chemical reaction, there is a lot of energy involved, both being added for the reaction to occur and also being released, but for a reaction to take place, we need the so-called Activation Energy, which is the minimum amount of energy required for the compounds to react. Letter D is correct

Amine:

Amines are molecules that contain carbon-nitrogen bonds. The nitrogen atom in an amine has a lone pair of electrons and three bonds to other atoms, either carbon or hydrogen.

Functional group: NH2-R primary amine; NH-R secondary amine; N-R tertiary amine.

CH3CH2NH2 is the only one true. This is ethylamine

CH3CH2OH: OH- alcohol group

CH3CH2COOH: -COOH the functional group is a carboxyl group from a carboxylic acid.

CH3CH2SH: SH- this functional group is referred to as either a thiol group or a sulfhydryl group.

Answer: CH3CH2NH2 is an amine

Answer:

Explanation:

Sodium oxide is an inorganic compound that has sodium and oxygen as its constituent

Majorly, its applications include in the ceramic industry and also aerounautical applications (for making light weight parts of air crafts)

So what exact properties of this oxide conform these properties?

The property here is that it is insoluble in water and other aqueous solutions

Furthermore, due to its ionic conductivity property, it finds use in applications like in the making of fuel cells.

According to the given solubility diagram, the solubility of potassium chlorate in water at 70°C is 30g/100g of water.

It means that if at 70°C there are 30g of this salt, the solution is saturated.

The correct answer is the last choice, saturated.

The molar mass for copper sulfate (CuSO₄), given that the atomic mass of sulfur (S) is 32.065, and the atomic mass of oxygen (O) is 15.999 amu, is 159.607 g/mol

The molar mass of a compound is the sum of the individual atomic masses of the various elements that makes up the compound.

With the above information, we can obtain the molar mass for copper sulfate (CuSO₄) as follow:

Molar mass of CuSO₄ = 63.546 + 32.065 + (4 × 15.999)

Molar mass of CuSO₄ = 63.546 + 32.065 + 63.996

Molar mass of CuSO₄ = 159.607 g/mol

Thus, we can conclude that the molar mass for copper sulfate (CuSO₄) is 159.607 g/mol

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Answer: 159.607 g/mol

Explanation:

Answer:

• Formula: ,Co,, Name: ,Cobalt,.

• Formula: ,C,, Name: ,Carbon,.

• Formula: ,Fe,, Name:, Iron,.

• Formula: ,Au,, Name: ,Gold,.

• Formula: ,KCl,, Name: ,Potassium chloride,.

• Formula: ,CS2,, Name: ,Carbon disulfide,.

• Formula: ,Si,, Name: ,Silicon,.

Explanation:

• Co is an element.

• Carbon is an element.

• Iron is an element.

• Au is an element.

• KCl is a compound with K and Cl. The name has the positive part first (Potassium) and the second part has the name of the negative part (chloride).

• CS2 is a compound with C and 2 S. The name has the number of each element, carbon is 1 so it is just Carbon, and there are 2 sulfurs (disulfide).

• Silicon is an element.

Example of each of the following mixtures and state whether it is a homogeneous or heterogeneous mixture

A mixture of a solid and a liquid -  Dirt and water [mud] (Heterogenous - mud can settle down at the bottom and leaving the mixture with much less mud at the top of the container than at the bottom)

A mixture of two gases - Smoke and fog [smog] (Heterogenous - Smog often carries around a lot of different particles other than just smoke and fog. These are not the same particles as another smog cloud a few miles over)

A mixture of two liquids - Milk and chocolate syrup [chocolate milk] (Heterogenous - The chocolate syrup can settle at the bottom leaving different amounts on both top and bottom of the mixture.)

A mixture of two solids - Copper and Zinc [brass] (Homogenous - Brass is always copper + zinc, though the ratios can vary greatly. If it were heterogenous we would see variety in things such as color, which we don't)

Mixture is the compound made up of two or more chemical component which are not chemically linked called as mixture

Here mixture of solid and liquid is dirt and water means water is the liquid whereas dirt is the solid and mixture of two gases are smoke and fog this two are gases that's why it is called mixture of gases and mixture of two liquid are milk and chocolate syrup because they are syrup that's why they are mixture of two liquid and mixture of two solid are copper and zinc copper is also the solid and zinc is also the solid that's why it is the mixture of two solid

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Explanation:

Mixtures can be homogeneous or heterogeneous.

Homogeneous mixtures have a distinct phase. Heterogeneous mixtures have two or more distinct phases.

A solution is a homogeneous mixture between two or more substances. The process used to obtain this mixture is called dissolution.

A solution is always formed by the solute and the solvent.

Answer: both

ANSWER

The volume of the gas is V2 is 38.1 liters

EXPLANATION

Given that;

To find the final volume of the balloon, follow the steps below

Step 1; Write the general gas law equation

Step 2; Convert the temperature to kelvin

Step 3; Substitute the given that into the formula given

Hence, the volume of the gas is V2 is 38.1 liters

Answer

Nuclear fusion and nuclear fission are different types of reactions that release energy due to the presence of high-powered atomic bonds between particles found within a nucleus.

In fission, an atom is split into two or more smaller, lighter atoms. Fusion, in contrast, occurs when two or more smaller atoms fuse together, creating a larger, heavier atom.

Fission reaction does not normally occur in nature.But fusion occurs in stars, such as the sun.

Fission produces many highly radioactive particles.Few radioactive particles are produced by the fusion reaction, but if a fission "trigger" is used, radioactive particles will result from that.

A critical mass of the substance and high-speed neutrons are required in fission. In contrast, a high density, high-temperature environment is required in a fusion reaction.

In a fission reaction, it takes little energy to split two atoms. Extremely high energy is required to bring two or more protons close enough that nuclear forces overcome their electrostatic repulsion in a fusion reaction.

In terms of released energy, the energy released by fission is a million times greater than that released in chemical reactions; but lower than the energy released by nuclear fusion. On the other hand, the energy released by fusion is three to four times greater than the energy released by fission.

One class of nuclear weapons is a fission bomb, also known as an atomic bomb or atom bomb. One class of nuclear weapons is the hydrogen bomb, which uses a fission reaction to "trigger" a fusion reaction.

In terms of energy production, fission is used in nuclear power plants.While fusion is an experimental technology for producing power.

Finally, Uranium is the primary fuel used in nuclear power plants.Hydrogen isotopes (Deuterium and Tritium) are the primary fuel used in experimental fusion power plants.

We have the compound Ec3H3O5. I assume that the compound Ec is an unknown compound, but we are given the molar mass of the compound Ec.

The molar mass of the molecule will be equal to the sum of the masses of each element multiplied by the number of times that it is repeated in the molecule, to make it clearer we can make the following table:

The molar mass of the molecule will be equal to 146.39g/mol, therefore the moles in 28.87 grams will be:

In 28.87g of Ec3H3O5 there are 0.20molEc3H3O5

Answer

The solute is more volatile when compared to the solvent.

Explanation

From the diagram, the solute is more volatile when compared to the solvent. This is because a volatile solute (i.e., a solute that has a vapor pressure of its own) will contribute to the vapor pressure above a solution in which it is dissolved.

Hence, the correct option is: The solute is more volatile when compared to the solvent.

Answer

979.94 grams

Explanation

Given:

Volume of solution = 2 L

Molarity = 5 M

What to find:

The mass in grams of H3PO4 present in the solution.

Step-by-step solution:

The first step is to calculate the moles of H3PO4 present using the molarity formula below:

Put the values of the given parameters into the formula to get the moles:

The moles of H3PO4 present in the solution = 10 mol.

Therefore, the mass present can be determined using the mole formula:

From the periodic table, the molar mass of H3PO4 can be known as 97.994 g/mol.

So putting moles = 10 mol and molar mass = 97.994 g/mol, then the mass is:

Therefore, the mass in grams of H3PO4 present in the solution = 979.94 grams.

In order to find the number of moles of O2 in this reaction we need to set up the properly balanced equation, which the question already gave us:

2 HgO -> 2 Hg + O2

From this equation we see that the molar ratio between HgO and O2 is 2:1, which means that for every 2 moles of HgO reacting we will end up having 1 mol of O2 as product, now what if we have 3.4 moles of HgO:

2 HgO = 1 O2

3.4 HgO = x O2

x = 1.7 moles of O2

ANSWER

EXPLANATION

Given that;

The volume is 91mL

Let x represent the volume in microliter

Recall, that 1mL is equivalent to 1000 microliters

Hence, the answer is 91000 microliters