An atom contains 5 protons, 6 neutrons, and 6 electrons. What is the mass
number of this atom? *

The main/most important factor that differentiates methanol, ethanol, and isopropanol from each other is the the number of the carbon atoms in the molecule.

1) The methanol : The molecular formula for the compound methanol is  CH₃OH. It contains number of the carbon atom is one.

2) The ethanol : The molecular formula for the compound ethanol is C₂H₆O. It contains the number of the carbon atoms is two.

3) The isopropanol : The molecular formula for the compound isopropanol is C₃H₈O. It contains the number of the carbon atom is 3.

Thus, it is clear that the main difference in these three compound is the difference in the number of the carbon atoms.

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Answer:

Explanations:

Here,we want to get the new pressure of the gas

To get this, we have to use the gas law that relates volume and pressure

This is the Boyle's law and it can be represented as follows:

Where 1 represents the initial values and 2 represents the final values

We have to convert the volumes to the same scale

We have to convert the liters to ml by multiplying by 1000

We have this as 1.42 * 1000 = 1420 mL

The values are:

Initial

Pressure = 21.31 kPa

Volume = 342.41 mL

Final

Pressure =?

Volume = 1420 mL

We substitute the values as follows:

Answer:

A scientific question to be asked is; What is the average speed of the toy car?

Explanation:

A scientific question is a question which is well defined, the values in the question can be measured, and the inputs and outputs related to the question are controllable

The parameters measured in the experiment are;

The time elapsed during the movement of the car, Δt

The distance the car moves, d

From the obtained measurements, the value can be calculated is the average speed of the toy car as follows;

\(The \ average \ speed \ of \ the \ toy \ car, \ v_{avg} = \dfrac{d}{\Delta t}\)

Therefore, a scientific question to be asked that will be answered by doing the experiment is; What is the average speed of the toy car?

Answer:

Sample Response: How can we change the speed of a toy car on a racetrack to describe the car’s motion?

What did you include in your question? Check all that apply.

a focus on describing the toy car’s motion

a suggestion for a way to change the car’s motion

room for observations and an opportunity to look at motion objective

Explanation:

The group number of the element whose electron configuration is shown in the image would be group 5.

The group that an element would belong to on the periodic table is determined by the number of valence electrons in the atoms of the element.

In other words, for neutral atoms, the valence electron equals the main group that its element would belong.

In the diagram, the nucleus of the atom is shown by the innermost circle. The rings surrounding the nucleus are the shells. The first shell is only able to have a maximum of 2 electrons while subsequent shells can take up to 8.

This means that the outermost shell, otherwise known as the valence shell of the atom has a total of 5 electrons. Hence, the group that the element whose atom is shown by the electron configuration would be group 5.

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Answer:

False

Explanation:

A series circuit is one that is all connected

Answer:

Element

Explanation:

It's C4 so there are four carbons.

Hope this helped! :))

If a bacterial culture produces 60.0 mL of methane gas at 700.0 mm Hg, the volume that would be produced at 760.0 mm Hg is this: 55.3 ml.

To calculate the volume of methane gas that would be produced at 700.0 mm Hg, we would apply Boyle's law. According to this law, P1V1 = P2V2

So, P1 = 700.0 mm Hg

V1 = 60.0 mL

P2 = 760.0 mm Hg

V2 = ?

So, when we plug in the numbers, we will have the following:

700.0 mm Hg × 60.0 mL = 760.0 mm Hg × V2

= 42,000 =760 V2

V2 = 42,000/760

= 55.26 approximately 55.3 ml.

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The correct answer is 19

5= 4(x+1)

=20=x+1

⇒x=19

The relationship between a reaction's products and reactants with regard to a certain unit is expressed by the equilibrium constant, K. This article introduces the mathematics needed to determine the partial pressure equilibrium constant as well as how to formulate expressions for equilibrium constants.

When the states of matter of the products and reactions are all the same, the reaction is said to be homogenous (the word "homo" means "same"). The solvent typically controls the reaction's overall state of matter.

When one or more of the reaction's states are distinct, the reaction is said to be heterogeneous (the Greek word "heteros" means "different").

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To determine the electronic configuration of the Co(II) center found in vitamin B12, please follow these steps:

1. Identify the atomic number of cobalt (Co): The atomic number of cobalt is 27, which means it has 27 electrons in its neutral state.

2. Write the electronic configuration of the neutral cobalt atom: The electronic configuration of cobalt is [Ar] 4s2 3d7, where [Ar] represents the electron configuration of the argon core.

3. Determine the charge of the Co(II) ion: Since it is a Co(II) ion, it has lost 2 electrons and now has 25 electrons.

4. Write the electronic configuration of the Co(II) ion: To account for the loss of 2 electrons, remove them from the outermost shell. The new configuration is [Ar] 4s0 3d7 or simply [Ar] 3d7.

In conclusion, the electronic configuration of the Co(II) center found in vitamin B12 is [Ar] 3d7.

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The pH after 25.0 mL of NaOH has been added would be approximately 8.20.

pH (potential of Hydrogen) is a measure of the acidity or alkalinity of a solution. It is measured on a logarithmic scale from 0 to 14, with 7 being neutral. A pH below 7 is considered acidic, while a pH above 7 is considered basic or alkaline. The lower the pH, the more acidic the solution is. The higher the pH, the more basic or alkaline the solution is. A pH of 0 is the most acidic and a pH of 14 is the most basic or alkaline. pH is important in many different fields, such as biology, chemistry, and medicine. It is used to measure the acidity of water, soil, and other substances, and is also used to monitor water quality.

This is equal to 0.0025 moles of HCl, which is equal to 0.00025 moles of HC2H3O2. The pH of the solution can then be calculated using the Henderson-Hasselbalch equation:  pH = pKa + log (base/acid)

pH = 4.76 + log(0.0025/0.00025)

pH = 8.20

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Answer:

C. a blue solid dissolving in a water and changing the water to a blue colour

Explanation:

Answer:

Since we're trying to find heat energy (Q) needed, we're going to use the formula for Q.

Q = (mass) x (specific heat capacity) x (change in temperature)

The mass of water is 5g here

The specific heat capacity of water is 4.18J/g (memorize the value since not many questions actually tell you the specific heat capacity)

The temperature change of water is 75 - 50 = so 25 degrees celsius

Now just plug them into the equation:

Q = (5g) x (4.18) x (25)

Q = 522.5 J (if you need this in kJ you have to divide the value by a 1000 or just move the decimal place to the left 3 times)

Therefore you need 522.5J or 0.5225 kJ of heat energy to raise the temperature of 5g of water from 50c to 75c

Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$

Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$

The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.

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In order to calculate the average bond energy of the O−H bond, we need to consider the energy changes involved in breaking the bonds in H2 and O2 and the energy change in forming the bonds in H2O.

The reaction involves breaking two H−H bonds and one O=O bond in the reactants, and forming four O−H bonds in the product. The energy change (ΔH) for the reaction is -571 kJ. Given that the bond energy of H−H is 435 kJ and the bond energy of O=O is 498 kJ, we can calculate the total energy change in breaking the bonds in the reactants:

Energy change = 2 × (bond energy of H−H) + (bond energy of O=O)

                 = 2 × 435 kJ + 498 kJ

                 = 1368 kJ

Since the reaction is exothermic (ΔH < 0), the energy released in forming the bonds in the products will be equal to the magnitude of the energy change: Energy change in forming bonds = 571 kJ Now, we can calculate the average bond energy of the O−H bond:

Average bond energy of O−H = (Energy change in forming bonds) / (Number of O−H bonds formed)

                                         = 571 kJ / 4

                                          ≈ 142.75 kJ

Therefore, the average bond energy of the O−H bond is approximately 142.75 kJ.

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The empirical formula of cyclobutane is C2H4, indicating that it consists of 2 carbon atoms and 4 hydrogen atoms. The empirical formula represents the simplest whole-number ratio of atoms in a compound and provides valuable information about its composition.

To determine the empirical formula of cyclobutane, we need to find the simplest ratio of carbon (C) and hydrogen (H) atoms present in the compound.

Given that cyclobutane consists of 4 carbon atoms and 8 hydrogen atoms, we can divide both numbers by their greatest common divisor to obtain the simplest ratio.

Dividing 4 by 4 gives us 1, and dividing 8 by 4 gives us 2. Therefore, the simplest ratio of carbon to hydrogen atoms in cyclobutane is 1:2.

Thus, the empirical formula of cyclobutane is C2H4, indicating that it contains 2 carbon atoms and 4 hydrogen atoms.

The empirical formula of cyclobutane is C2H4, indicating that it consists of 2 carbon atoms and 4 hydrogen atoms. The empirical formula represents the simplest whole-number ratio of atoms in a compound and provides valuable information about its composition.

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Explanation: 5 km is equal to 50,000,000 because 1 is equal to 10,000,000

I hope I helped

The carbonyl stretching frequency in the infrared spectrum depends on the nature of the carbonyl group and the adjacent functional groups or substituents. Based on this, we can rank the given molecules in terms of their carbonyl stretching frequency, from highest to lowest:

2,4-cyclohexadienone > 2-cyclohexenone > cyclohexenone > cyclohexanone

In general, a carbonyl group adjacent to an electron-withdrawing group will have a higher stretching frequency compared to a carbonyl group adjacent to an electron-donating group.

In 2,4-cyclohexadienone, the two carbonyl groups are conjugated with each other and with the double bonds in the ring, resulting in a very high carbonyl stretching frequency. In 2-cyclohexenone, the carbonyl group is conjugated with the double bond in the ring, resulting in a slightly lower stretching frequency.

In cyclohexenone, the carbonyl group is adjacent to a single double bond in the ring, resulting in a lower stretching frequency compared to 2-cyclohexenone. In cyclohexanone, the carbonyl group is not conjugated with any other functional group, resulting in the lowest carbonyl stretching frequency among the given molecules.

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A spontaneous process is a process that takes place without a continuous input of energy from an external source.

This means that the process occurs naturally without any external force or energy driving it. It is not a process that requires continual input of energy from an external source, nor is it a process which has an unpredictable outcome. Additionally, it is not a process that takes place so slowly as to be capable of changing direction in response to an infinitesimally small change in conditions. The defining characteristic of a spontaneous process is its ability to occur naturally without any external energy input. This means that once initiated, it proceeds on its own without needing additional energy to sustain it. Unlike processes requiring continuous energy input, spontaneous processes often move towards a state of equilibrium or lower energy state.

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Answer: The theoretical yield of alum is 12.09 g

Explanation:

Molarity is calculated by using the equation:

\(\text{Molarity}=\frac{\text{Moles}}{\text{Volume}}\) ......(1)

We are given:  

Molarity of sulfuric acid = 9.9 M

Volume of solution = 8.3 mL = 0.0083 L (Conversion factor: 1 L = 1000 mL)

Putting values in equation 1, we get:

\(\text{Moles of sulfuric acid}=(9.9mol/L\times 0.0083L)=0.08217mol\)

The given chemical equation follows:

\(2Al+2KOH+4H_2SO_4+22H_2O\rightarrow 3H_2+2KAl(SO_4)_2.12H_2O\)

By the stoichiometry of the reaction:

4 moles of sulfuric acid produces 2 moles of alum

So, 0.08217 moles of sulfuric acid will produce = \(\frac{2}{4}\times 0.08217=0.0411mol\) of alum

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\) ......(2)

Molar mass of alum = 294.24 g/mol

Plugging values in equation 2:

\(\text{Mass of alum}=(0.0411mol\times 294.24g/mol)=12.09g\)

Hence, the theoretical yield of alum is 12.09 g

from google, so I think the answer to that question is the second one

Answer: This is a link to all of the awsers

https://pshs.psd202.org/documents/ssafe/1552416190.pdf

Explanation:

The volume of the container is approximately 24.5 L. To calculate the volume of the container, we can use the ideal gas law.

The ideal gas law, which states:

PV = nRT

where:

P = pressure of the gas

V = volume of the gas

n = number of moles of the gas

R = gas constant

T = temperature of the gas in kelvin

First, we need to convert the temperature from Celsius to Kelvin by adding 273.15:

T = 25°C + 273.15 = 298.15 K

Next, we can substitute the given values into the ideal gas law:

PV = nRT

V = (nRT) / P

We are given that n = 1.0 mol, R is a constant (0.0821 L·atm/K·mol), T = 298.15 K, and P = 101.352 kPa.

So, we can substitute these values and solve for V:

V = (nRT) / P

V = (1.0 mol * 0.0821 L·atm/K·mol * 298.15 K) / (101.352 kPa)

V = 24.5 L

Therefore, the volume of the container is approximately 24.5 L.

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Answer:

d = 2.5 g/L

Explanation:

Given data:

Molar mass of gas = 56 g/mol

Density of gas = ?

Temperature = 273.15 K

Pressure = 1 atm

Solution:

Formula:

d = PM/RT

d = 1 atm × 56 g/mol / 0.0821 atm.L/mol.K ×273.15 K

d = 56 atm  g/mol./ 22.42 atm.L/mol

d = 2.5 g/L

The percentage yield of the iron is obtained as 71.4 %.

We know that the stoichiometry of a reaction can help us to be able to find the amount of the substances that have been used in a process. In this case, we have been shown the balanced reaction equation of the reaction in the image that have been attached to the question.

We can see that;

Mass of the iron III oxide = 80 tonnes or 8 * 10^7 g

Mass of iron produced =  40 tonnes of 4 * 10^7 g

Number of moles of iron III oxide reacted = 8 * 10^7 g/160 g/mol

= 5 * 10^5 moles

If 1 mole of iron III oxide produces 2 moles of iron

5 * 10^5 moles of iron III oxide produces;

5 * 10^5 moles * 2 moles/ 1 mole

= 1 * 10^6 moles

Theoretical yield of the iron =   1 * 10^6 moles * 56 g/mol

= 5.6 * 10^7 g

Percent yield = actual yield/Theoretical yield * 100/1

= 4 * 10^7 g/5.6 * 10^7 g * 100/1

= 71.4 %

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The graph shows the distribution of energy in the particles of two gas samples at different temperatures, T1 and T2. A, B, and C represent individual particles.

Most of the gas particles have either very high or very low kinetic energies.Explanation:Here is the graph that describes the energy in particles of two gas samples at different temperatures, T1 and T2:Description of the graph: The x-axis of the graph shows the title Kinetic Energy. The y-axis of the graph shows the title Number of Particles. Two inverted graph curves run close to each other. One of the curves labeled T1 is slightly more spread out than the other labeled T2. A vertical line perpendicular to the x-axis is shown, which is labeled Activation Energy. A point labeled B is shown on the right side of the vertical line. A point labeled A is shown in the lower left side of the vertical line. A particle labeled C is shown in the upper left side of the vertical line.

According to the graph, the activation energy required for the reaction is quite high, and most of the gas particles have either very high or very low kinetic energies. In option A, it is not sure whether Particle B will participate in the reaction or not. Hence, option A is not correct. In option B, it is not sure whether Particle C will participate in the reaction or not. Hence, option B is not correct. In option D, it is not given that at which temperature (T1 or T2) more gas particles participate in the reaction.  Option C is correct because it is given in the graph that most of the gas particles have either very high or very low kinetic energies.

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Answer:

50%, pups haven't solidfur

2. DOMINANT FF IS NOT POSSIBLE

Answer:

Ionic

General Formulas and Concepts:

Chemistry - Compounds

Explanation:

Step 1: Define

MgI₂ - Magnesium Iodide

Step 2: Identify

Mg is an Alkaline Earth Metal

I is a Halogen Gas

Step 3: Confirm

Mg will transfer its 2 electrons to 2 separate I's and will form an Ionic bond.

Avogadro's number

1 mole = 6.02.10²³ particles (atoms, molecules, ions)

\(\tt 1.87\times 10^{24}\div 6.02\times 10^{23}=\boxed{\bold{3.11~moles}}\)

One mole of copper contains 6.02 × 10²³ copper atoms. Therefore, the number of moles that contains 1.87 ×10²⁴ copper atoms is 3.1 moles.

The number of atoms that constitutes one mole of a substance is called Avogadro number. It is equal to  6.02 × 10²³. Thus, one mole of every elements contains Avogadro number of atoms.

Similarly, one mole of a compound contains  6.02 × 10²³ number of molecules. Thus, one mole of carbon dioxide contains these much molecules.

Given the number of atoms of copper = 1.87 ×10²⁴

Then, no.of moles = number of atoms/ Avogadro number.

no.of moles =1.87 ×10²⁴ /6.022 × 10²³  = 3.1 moles.

Therefore, the number of moles of copper that contains 1.87 ×10²⁴ atoms is 3.1

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