Esters are formed from the reaction of an alcohol and a carboxylic acid. Identify the alcohol and carboxylic acid combination necessary to make each pictured ester.

Answer: 1.  C. polar covalent: electrons shared between silicon and sulfur but attracted more to the sulfur

2. B)  [tex]NH_3[/tex]

3. B) Fluorine

Explanation:

1. A polar covalent bond is defined as the bond which is formed when there is a difference of electronegativities between the atoms.

Electronegativity difference = electronegativity of sulphur- electronegativity of silicon = 2.5 -1.8 = 0.7

Thus as electronegativity difference is less than 1.7 , the cond is polar covalent and as electronegativity of sulphur is more , the electrons will be more towards sulphur.

2. A molecular compound is usually composed of two or more nonmetal elements. Example: [tex]NH_3[/tex]

Ionic compound is formed by the transfer of electrons from metals to non metals. Example: [tex]Mg_3N_2[/tex] , [tex]AlCl_3[/tex] and [tex]LiBr[/tex]

3.  For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Here K is having an oxidation state of +1 and as the compound formed is KZ, the oxidation state of non metallic element Z should be -1. Thus the element Z is flourine which exists as diatomic gas [tex]F_2[/tex]

Answer:

One could be What kind of insulator do you use in the winter?

Explanation:

The mass of lithium metal that is used in lithium batteries is 6.17 grams,  this can be calculated by using number of moles formula.

It is defined as the ratio between mass and molar mass.

It is given by:

Number of moles = mass / Molar mass

What information do we have?

Number of moles= 0.89 moles

Molar mass of Lithium metal= 6.941 g/mol

To find:

Mass of Lithium metal=?

On substituting the values

n= m/M

0.89 = m/ 6.941

m= 0.89*6.941

m= 6.177 grams

Thus, the mass of lithium metal is 6.177 grams.

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Answer:

answer of this question is option. 3. compound 1 is ionic ,and 2 is molecular

Compound 1 is ionic and compound 2 is molecular. The correct option is 3) Compound 1 is ionic, and compound 2 is molecular

From the question,

We are to classify the compounds according to the information provided in the table

First,

We will list the properties of ionic and molecular compounds

Properties of ionic compounds

Properties of molecular compounds

In the given table,

Compound 1 has high melting and boiling points, and it is a good electrical conductor. Therefore, compound 1 is ionic

Compound 2 has low melting and boiling points, and it is a poor electrical conductor. Therefore, compound 2 is molecular

Hence, Compound 1 is ionic and compound 2 is molecular. The correct option is 3) Compound 1 is ionic, and compound 2 is molecular

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Answer:

See explanation and image attached

Explanation:

Now, we have chosen the alkene 1-propene in our example.

In the first reaction of  1-propene  with HBr, the reaction proceeds by ionic mechanism leading to the formation of 2-bromo propane.

In the second reaction of  1-propene  with the bromine molecule, the first step is the formation of the brominium cation which is a cyclic intermidiate followed by the addition of Br^- yielding the 1,2- dibromopropane product

Heat needed to raise the temperature : Q = 3432 J

Given

c = The specific heat capacity = 2.20 J/g-K

m = mass = 5 g

Δt = Temperature difference = 75-36 =39 °C=312 K

Required

Heat needed

Solution

Heat can be formulated

Q = m.c.Δt

Input the values :

Q = 5 g x 2.2 J/g-K x 312 K

Q = 3432 J

Answer:

B. It becomes plutonium-239.

Explanation:

When uranium  - 238 absorbs a neutron, it creates and becomes plutonium - 239 atom.

 This is a nuclear fission process in which a radioactive nucleus is bombarded with a neutron:

  ²³⁸₉₂U    +     ¹₀n   →      ²³⁹₉₂Pu

The plutonium produced is not stable and it immediately disintegrates further.

Answer:

B.) It becomes plutonium-239

Explanation:

I got it correct on founders edtell

Answer:

5 its just what i do

Explanation:

Answer: As a consequence, chemical equations must be balanced, meaning that the number and kinds of atoms must be the same on both sides of the reaction arrow. The numbers placed in front of formulas to balance equations are called coefficients, and they multiply all the atoms in a formula.

Answer:

9717.246 J

Explanation:

From the question given above, the following data were obtained:

Mass (m) of water = 40.5 g

Initial temperature (T₁) = 15.6 °C

Final temperature (T₂) = 73 °C

Specific heat capacity (C) of water = 4.18 J/gºC

Heat (Q) =.?

Next, we shall determine the change in the temperature of water. This can be obtained as follow:

Initial temperature (T₁) = 15.6 °C

Final temperature (T₂) = 73 °C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = 73 – 15.6

ΔT = 57.4 °C

Finally, we shall determine the heat energy required. This can be obtained as follow:

Mass (m) of water = 40.5 g

Specific heat capacity (C) of water = 4.18 J/gºC

Change in temperature (ΔT) = 57.4 °C

Heat (Q) =.?

Q = MCΔT

Q = 40.5 × 4.18 × 57.4

Q = 9717.246 J

Thus, the heat energy required is 9717.246 J

Answer:

Explanation:

Two or more compounds are said to be isomers if they have the same molecular formula but different structures.

Isomers that have the same molecular formula but different connectivity are largely regarded as constitutional isomers.

From below, we can see the different constitutional isomers of C2H6O2.

(a)

[tex]\mathbf{CH_3 - O - O - CH_3}[/tex]

(b)

CH₃ - CH₂ - O - O - H  

(c)

   [tex]OH\ \ \ \ \ \ \ \ \ \ \ OH[/tex]

     |                |

 CH₂    --     CH₂

(d)

           OH

            |

CH₃ -- CH

            |

          OH

(e)

[tex]\mathbf{CH_3- O - CH_2-OH}[/tex]

Answer: 0.671614483912211

Explanation: A mole is 6.02214076×1023 (also known as the Avogadro number) I hope this helps!

Answer:

One week.

Explanation:

I would think one month because on weather websites you can see a month of weather. But the closer the day your looking at the prediction will be more accurate.

The most accurate range of data for weather forecasting is: A. one week.

Weather can be defined as the average atmospheric conditions of a particular area (region) over a short period of time.

Some examples of the elements of weather include the following:

In meteorology, the most common forecasted element of weather is temperature (degree of hotness or coldness) and it usually done a weekly basis such as one week.

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Answer:

Change is happening all around us all of the time. Just as chemists have classified elements and compounds, they have also classified types of changes. Changes are classified as either physical or chemical changes. Chemists learn a lot about the nature of matter by studying the changes that matter can undergo. Chemists make a distinction between two different types of changes that they study—physical changes and chemical changes.

Answer:

electron transport 11 is the correct answer

Answer:

Mass = 18.29 g  

Explanation:

Given data:

Mass of beryllium needed = ?

Mass of nitrogen = 18.9 g

Solution:

Chemical equation:

3Be + N₂    →    Be₃N₂

Number of moles of nitrogen:

Number of moles = mass/molar mass

Molar mass of nitrogen = 28 g/mol

Number of moles = 18.9 g/ 28 g/mol

Number of moles = 0.675 mol

Now we will compare the moles of nitrogen and Be.

                       N₂        :       Be        

                        1          :       3

                   0.675       :      3/1×0.675 = 2.03 mol

Mass of Be:

Mass = number of moles × molar mass

Mass = 2.03 mol ×   9.01 g/mol

Mass = 18.29 g  

Answer:

yes because of fluorine has higher electronegativity

Answer:

False

Explanation:

Mixtures are impure substances.

There are two types of mixtures based on the number of coexisting phases.

Homogeneous mixtures have their constituents existing in one single phase. The components are evenly spaced.

Heterogeneous mixtures have their constituents existing in at least two different phases. Therefore, they are unevenly spaced due to the phases present within the mixture.

Answer:

When converting from liters to moles or moles to liters, you will use the equality 1 mole=22.4 L for a gas at STP.

If you have moles and want to convert to (Volume) liters, 1 mole = 22.4 L is the conversion factor that can be used.

The area that any three-dimensional solid occupies is known as its volume. These solids can take the form of a cube, cuboid, cone, cylinder, or sphere. Various forms have various volumes. We have studied the several solids and forms that are specified in three dimensions, such as cubes, cuboids, cylinders, cones, etc., in 3D geometry. We will discover how we can determine the volume for each of these shapes. One mole of any gas have 22.4 L at STP.

1 mole = 22.4 L

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Answer:

1st one

Explanation:

The volume of the gas : V = 13.243 L

Given

n = 0.25 mole

P = 0.5 atm

T = 50 + 273 = 323 K

Required

The volume

Solution

Ideal gas law

PV=nRT

R = gas constant = 0.082 L.atm/mol K

V = nRT/P

Input the value :

V=0.25 x 0.082 x 323 / 0.5

V = 13.243 L

Answer:

0.57 moles (NH4)3PO4 (2 sig. figs.)

Explanation:

To quote, J.R.

"Note:  liquid ammonia (NH3) is actually aqueous ammonium hydroxide (NH4OH) because NH3 + H2O -> NH4OH.

H3PO4(aq) + 3NH4OH(aq) ==> (NH4)3PO4 + 3H2O  

Assuming that H3PO4 is not limiting, i.e. it is present in excess

1.7 mol NH4OH x 1 mole (NH4)3PO4/3 moles NH4OH = 0.567 moles = 0.57 moles (NH4)3PO4 (2 sig. figs.)"

Answer:

0.00182 cm

Explanation:

Area of the aluminum foil = 22.86 cm ×22.86 cm = 522.58 cm^2

Density = mass/area × thickness

Density × area × thickness = mass

Thickness = mass/ Density × area

Thickness = 2.568 g/2.70 g/cm^3 × 522.58 cm^2

Thickness= 0.00182 cm

Answer:

im pretty sure c

Explanation: