Determine the molecular formula for a compound that has a molecular mass of 52.0 g/mole
and and is composed of 92.31% carbon and 7.69% hydrogen.

Answer:

18.015

Explanation:

Using the periodic table of the elements to find atomic weights, we find that hydrogen has an atomic weight of 1, and oxygen's is 16. In order to calculate the molecular weight of one water molecule, we add the contributions from each atom; that is, 2(1) + 1(16) = 18 grams/mole.

Answer:

It would be the Mantle,I believe

Total electrons in fluorine (F): 9. Valence electrons in fluorine (F):7.

The element fluorine (F) is located in the periodic table in Group 17, also known as Group VIIA or the halogens. Fluorine has an atomic number of 9, indicating that it contains 9 electrons in its neutral state.

To determine the total number of electrons in a neutral atom of fluorine, we refer to its atomic number, which corresponds to the number of protons and electrons in an atom. Thus, fluorine has a total of 9 electrons.

Valence electrons are the electrons in the outermost energy level, also known as the valence shell, of an atom. For fluorine, the valence electrons are found in the second energy level, specifically in the 2p orbital. Since the second energy level can accommodate a maximum of 8 electrons, fluorine has 7 valence electrons.

Valence electrons play a crucial role in chemical bonding and determining the reactivity of an element. In the case of fluorine, its 7 valence electrons make it highly reactive, as it only needs one additional electron to achieve a stable, full outer electron configuration of 8 electrons. This strong desire to gain an electron makes fluorine one of the most electronegative elements on the periodic table.

In summary, a neutral atom of fluorine (F) has a total of 9 electrons, with 7 of them being valence electrons located in the 2p orbital.

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If you're attempting to synthesize 2 benzyl pentanoic acid from acetoacetic ester, keep in mind that you can do so fairly quickly by following these simplified instructions:

From its pungent free scent to its solid state at temperatures ranging from 118 120°C, acetoacetic ester (better known as ethyl acetoacetate) offers significant value for those working within organic synthesis.

As one of many potent ketones utilized by researchers around the globe its unique properties make it ideal for building complex molecules essential for modern medicine and more.

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Answer:

A decrease in temperature decreases the number of collisions between molecules . The reaction rate will  decrease

Explanation:

When dissolved in water, most Group 1 metal salts can be described as strong electrolytes.

When Group 1 metal salts are dissolved in water, they can be described as strong electrolytes. This is because Group 1 metals, such as lithium (Li), sodium (Na), potassium (K), and so on, readily lose their outermost valence electron to form positive ions (cations). These cations then dissociate completely in water, separating from the anions to which they were originally bonded.

The dissociation of Group 1 metal salts in water results in the formation of positively charged metal ions and negatively charged non-metal ions (anions). These ions are free to move and conduct electric current, making the solution a good conductor of electricity. The complete dissociation of Group 1 metal salts in water and the presence of freely moving ions make them strong electrolytes.

Strong electrolytes are substances that ionize completely or almost completely in solution, producing a high concentration of ions. This is in contrast to weak electrolytes, which only partially ionize and produce a lower concentration of ions.

In summary, when Group 1 metal salts are dissolved in water, they form strong electrolytes due to their ability to dissociate completely into ions, leading to a high concentration of freely moving ions in the solution, thus enabling efficient electrical conductivity.

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147.05 g/mol

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Step 1: Define

CuClO₃

Step 2: Find MM

Molar Mass of Cu - 63.55 g/mol

Molar Mass of Cl - 35.45 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of CuClO₃ - 63.55 + 35.45 + 3(16.00) = 147.05 g/mol

The measure of angle x in the right triangle is appromximately 18.3 degrees.

The figure in the image is a right triangle as one of its interior angle is at 90 degrees.

Angle x = ?

Opposite to angle x = 11

Hypotenuse = 35

To solve for the missing angle (x), we use the trigonometric ratio.

Note that: sine = opposite / hypotenuse

Hence:

sin( x ) = opposite / hypotenuse

Plug in the given values:

sin( x ) = 11/35

Take the sine inverse:

x = sin⁻¹( 11/35 )

x = 18.3°

Therefore, angle x measure 18.3 degrees.

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Answer:

\([H^+]=1x10^{-7}M\)

Explanation:

Hello.

In this case, since the reaction between sodium hydroxide and hydrochloric acid has a 1:1 mole ratio between them:

\(NaOH+HCl\rightarrow NaCl+H_2O\)

In order to compute the hydronium H⁺ concentration in the mixed volumes of the given solutions we first compute the moles of each reactant:

\(n_{NaOH}=0.750L*0.10mol/L=0.075mol\\\\n_{HCl}=0.250L*0.30mol/L=0.075mol\)

As seen, since those amounts are the same, we infer all the acid and base are consumed so the pH is 7 because a neutral salt is produced, and the corresponding H⁺ concentration is:

\([H^+]=10^{-pH}=10^{-7}=1x10^{-7}M\)

Best regards!

Acetic acid only partially ionizes in water as it is a weak acid.

Weak Acids are the acids that do not completely dissociate into their constituent ions when dissolved in solutions.

When dissolved in water, an equilibrium is established between the concentration of the weak acid and its constituent ions.

Acetic acid, also known as ethanoic acid, is a weak acid with the chemical formula CH₃COOH. It is known to be the active component of vinegar.

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Answer:

c. pH=-log[H+]

Explanation:

pH=-log10[H+]

Answer:

1.34 * 10^-7 M

Explanation:

The Ksp of lead II chromate is 1.8 x 10^-14

So, we have that;

PbCrO4(s) -----> Pb^2+(aq) + CrO4^2-(aq)

                             s                  s

Where s = molar concentration of Pb^2+(aq) and  CrO4^2-(aq)

and;

[Pb^2+] = [CrO4^2-]

This implies that Ksp = s^2

s = √Ksp

s = √1.8 x 10^-14

s = 1.34 * 10^-7 M

Based on the description of the potential energy diagram provided, the diagram made by the student appears to be correct.

The potential energy diagram represents the energy changes that occur during a chemical reaction. In an endothermic reaction, the products have higher potential energy than the reactants, meaning energy is absorbed from the surroundings.

The curve line on the graph indicates the energy changes throughout the reaction pathway. It starts at a higher level, representing the initial potential energy of the reactants. As the reaction progresses, the potential energy decreases, indicating the formation of products with lower potential energy.

The broken horizontal line from point X on the y-axis to the point where the curve begins represents the activation energy (Ea) of the reaction. Activation energy is the energy barrier that must be overcome for the reactants to convert into products.

Point X on the y-axis indicates the potential energy of the reactants at the start of the reaction, and the broken line shows the energy required to initiate the reaction.

The broken horizontal line from point Y on the y-axis to the point where the curve ends represents the potential energy of the products. Point Y represents the potential energy of the products at the end of the reaction.

Overall, the student's diagram correctly represents an endothermic reaction, showing the potential energy changes, the activation energy, and the final potential energy of the products. The curve line starts at a higher level (representing the higher potential energy of the reactants) and ends at a slightly lower level (representing the lower potential energy of the products).

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The best description of the relationship between population size, carrying capacity, and limiting factors is: "The size of a population usually stays near its carrying capacity due to limiting factors."

Carrying capacity refers to the maximum number of individuals that a particular environment can sustainably support. It represents the limit to which a population can grow given the available resources, such as food, water, and habitat. Limiting factors, on the other hand, are the factors that restrict population growth by reducing birth rates, increasing death rates, or limiting access to resources.As a population approaches its carrying capacity, limiting factors come into play and regulate the population size. These limiting factors can include competition for resources, predation, disease, availability of suitable habitat, and other environmental factors. They act as checks on population growth, preventing it from exceeding the carrying capacity of the ecosystem.

Therefore, the size of a population usually stays near its carrying capacity because the limiting factors ensure that the population does not exceed the available resources and ecological limits of the environment. If the population surpasses the carrying capacity, the limiting factors will intensify, causing a decline in resources and an increase in mortality rates, which ultimately brings the population back towards the carrying capacity.It's important to note that the relationship between population size, carrying capacity, and limiting factors is dynamic and can vary depending on various ecological and environmental factors.

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Answer:

m = 49.8 g

Explanation:

Hello there!

In this case, for this calorimetry processes we can define the involved heat in terms of mass, specific heat and temperature as shown below:

\(Q=mC\Delta T\)

Thus, given the heat, final and initial temperature and specific heat of water (4.184), the mass of water can be computed as shown below:

\(m=\frac{Q}{C\Delta T}\\\\m=\frac{12500J}{4.184\frac{J}{g\°C}(75\°C-15.0\°C)} \\\\m=49.8g\)

Best regards!

Answer:

137 g

Explanation:

Since1 L=103  mLyou can say that your sample must contain 550.0mL solution⋅1.50 moles KI103mL solution=0.825 moles KITo convert the number of moles of potassium iodide to grams, use the molar mass of the compound.0.825moles KI⋅166.003 g1mole KI=137 g−−−−−

The percent yield is 86.1%.

The percent yield is a measure of the efficiency of a chemical reaction and is calculated by comparing the actual yield of a reaction to the theoretical yield that could be obtained based on stoichiometry. The percent yield is expressed as a percentage and is calculated using the following formula:

Percent yield = (Actual yield ÷ Theoretical yield) x 100%

We can see;

Number of moles of octane = 3.05 * 10^1/114 g/mol

= 0.27 moles

Then  from the reaction equation;

2 moles of octane produces 16 moles of CO2

0.27 moles of octane would produce 0.27 * 16/2

= 2.16 moles

Theoretical yield of the product =  2.16 moles * 44 g/mol

= 95 g

Thus we have that;

% yield = 8.179 * 10^1 g/95 g * 100/1

= 86.1%

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Answer:

\(\boxed {\boxed {\sf 2.76 \ mol}}\)

Explanation:

Molarity is found by dividing the moles of solute by liters of solution.

\(molarity = \frac {moles}{liters}\)

We know the molarity is 1.2 M (mol\liter) and there are 2.3 liters of solution. Substitute the known values into the formula.

\(1.2 \ mol/liter= \frac {x}{2.3 \ liters}\)

Since we are solving for x, we must isolate the variable. It is being divided by 2.3 and the inverse of division is multiplication. Multiply both sides by 2.3 liters.

\(2.3 \ liters *1.2 \ mol/liter= \frac {x}{2.3 \ liters}* 2.3 \ liters\\2.3 *1.2 \ mol= x\\2.76 \ mol =x\)

In a solution with a molarity of 1.2 and 2.3 liters of solution, there are 2.76 moles.

The reversible production of carbon dioxide and hydrogen gas as a result of a reaction between steam and carbon monoxide. The chemical formula for a balanced reaction is CO (g) + H2O (g) CO2 (g) + H2(g).

Carbon dioxide (CO2) and hydrogen gas are created when carbon monoxide (CO) and water mix (H2O). The process is reversible and every molecule in the balanced equation has a coefficient of 1.

Significant amounts of carbon are released into the atmosphere as a result of the burning of fossil fuels, changing land use, and the production of concrete with limestone.

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Answer:

see explanations

Explanation:

a. The central atom bonded to four substituent atoms and having no lone pair.

This is an AX₄ geometry => tetrahedron

b. The central atom bonded to three substituent atoms and having one lone pair.

This is an AX₃E geometry => pyramidal

c. The central atom bonded to two substituent atoms ảnd having

one lone pair.

This is an AX₂E geometry => bent angular

d. The central atom bonded to two substituent atoms and having no lone pair.

This is an AX₂ geometry => linear

_______________________________

Based upon the VSEPR Theory there are 6 parent geometry configurations and associated derived geometries.

Parent geometries  => Derivatives => Examples

For graphic images of each geometry do an internet search for 'molecular geometry'.

Answer: 48.60g of Mg is equivalent

Explanation:

i hope this helhelps

Answer: kg= 0.37

Explanation:

Use the molality formula.

M= m/kg

The rate constant of the second-order reaction is 0.111 M^-1 min^-1.

The given data represents a second-order reaction where the rate of the reaction is proportional to the square of the concentration of A.

The integrated form of the second-order reaction is:

1/[A]t = kt + 1/[A]0

where [A]t and [A]0 are the concentrations of reactant A at time t and time zero, respectively, k is the rate constant.

We can use the given information to calculate the rate constant (k) of the reaction for the given half-life (t1/2) of 3.15 minutes:

t1/2 = (1 / k[A]0)

Using the percentage decrease in concentration and the given initial concentration, we can calculate the concentration of A at time t:

[A]t = [A]0 - 0.30[A]0 = 0.57126 M

Substituting the given values, we get:

3.15 min = (1 / k)(0.0818 M) / (0.0818 M - 0.57126 M)

Simplifying the equation above, we can solve for k:

k = 0.111 M^-1 min^-1

Therefore, the rate constant of the second-order reaction is 0.111 M^-1 min^-1.

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KEtotal = 5.60 × \(10^{-21}\)/molecule × 6.022 × 10^23 molecules/mol = 3.37 × \(10^{3}\) J/mol (rounded to two significant figures)

What is Room Temperature?

Room temperature is a comfortable range of temperatures that is generally considered to be between 68°F (20°C) and 77°F (25°C). It is the temperature range typically found in indoor spaces such as homes, offices, and public buildings where people tend to spend their time.

A) To convert from mph to m/s, we can use the conversion factor 1 mph = 0.44704 m/s. So the average speed of N2 molecules in m/s is:

1040 mph × 0.44704 m/s per mph = 465.6 m/s (rounded to one decimal place)

B) The kinetic energy of a molecule can be calculated using the formula:

KE = (1/2) × m × \(v^{2}\)

where KE is the kinetic energy, m is the mass of the molecule, and v is the velocity (speed) of the molecule. The mass of an N2 molecule is about 28 atomic mass units, which is equivalent to 4.65 ×\(10^{-26}\)kg. So the kinetic energy of an N2 molecule moving at 465.6 m/s is:

KE = (1/2) × 4.65 × \(10^{-26}\) kg × (465.6 m/s)^2 = 5.60 × \(10^{-21}\) J (rounded to two significant figures)

C) The total kinetic energy of 1 mol of N2 molecules can be found by multiplying the kinetic energy of a single molecule by the Avogadro constant (6.022 × \(10^{23}\) molecules/mol):

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One benefit of asexual reproduction is that it is efficient and fast because one organism is involved. ⇒ True

Binary fission is the process of splitting into two identical organisms.⇒ True

The term reproduction is defined as the production of offsprings. There are two types of reproduction. 1. Sexual reproduction 2. Asexual reproduction.

Budding involves a hydra budding an identical right off themselves.⇒ False

Sexual reproduction involves the uniting of gametes. ⇒ True

Sperm and egg cells have 20 chromosomes.⇒ False

One benefit of sexual reproduction is genetic diversity.⇒ True

Genetic variety can exist in a population of grasshoppers due to asexual reproduction.⇒ False

Thus, One benefit of asexual reproduction is that it is efficient and fast because one organism is involved. ⇒ True

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Answer:

A. it allows results to be reviewed and reproduced by other scientists.

How temperature and air pressure play a role in creating wind.

Gases move from high-pressure areas to low-pressure areas. And the bigger the difference between the pressures, the faster the air will move from the high to the low pressure. That rush of air is the wind we experience.

hope it helps.

Aliyyah.

Winds are created by the change in temperature gradient which results in the difference in pressure causes the circulation of air from high pressure area to low pressure area that is called winds.

Wind is the circulation or passage of air from one region to the other over a pressure gradient. The pressure gradient is resulting from the uneven heating of the atmosphere.

According to Gay- Lussac's  law, the pressure of a gas is directly proportional to the temperature of the region. Thus as the temperature over an area increases pressure also increases.

The heat radiated from the sun is unevenly distributed in the earth atmosphere results in difference in pressure also. To balance this pressure difference, the air from high pressure region passes to low pressure region creating the winds.

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