Which of the following describes a covalent bond?
-It is the sharing of electrons between atoms with an electronegativity difference ABOVE 1.7.
or
-It is the sharing of electrons between atoms with an electronegativty BELOW 1.7.

Answer:

\(\huge\boxed{\sf 9812.16\ L\ of\ air}\)

Explanation:

Given that,

A person breathes 6.814 L of air in a minute.

1 minute = 6.814 L

= 1 × 24 × 60 (24 hours in a day; 60 minutes in an hour)

= 1440 minutes

1 minute = 6.814 L of air

1440 minutes = 6.814 L × 1440

1 day = 9812.16 L of air

\(\rule[225]{225}{2}\)

Answer:

True if by rifting you mean continental rift. If not idk.

Answer:

Following are the solution to this equation:

Explanation:

In the given-question, an attachment file of the choices was missing, which can be attached in the question and its solution can be defined as follows:

In the given question "Option (iii)" is correct, which is defined in the attachment file.

When 2,2,3-trimethylcyclohexanone reacts with hydroxylamine it will produce the 2,2,3-trimethylcyclohexanoxime.

The given question is incomplete, the complete question is:

A 10.0 L tank at 28.6 C is filled with 5.67 g of sulfur tetrafluoride gas and 4.66 g of carbon monoxide gas. You can assume both gases behave as ideal gases under these conditions. Calculate the total pressure in the tank. Round each of your answers to 3 significant digits.

Answer:

The correct answer is 0.541 atm.

Explanation:

Based on the given information, 5.67 grams of sulfur tetrafluoride gas and 4.66 grams of CO gas is filled in the tank having the capacity of 10 liters at 28.6 degree C or 273 + 28.6 = 301.6 K. The no. of moles can be determined by using the formula, n = weight/molecular mass.  

The moles of sulfur tetrafluoride = 5.67 grams / 108 gram per mole (The molecular mass of SF4 is 108 g/mol)

= 0.0525 moles

Similarly the moles of CO = 4.66 grams / 28 gram per mole (The molecular mass of CO is 28 g/mol)

= 0.166 moles

The sum of the moles = 0.0525 + 0.166 = 0.2185 moles

The total pressure can be calculated by using the formula,  

P = nRT/V

Here n is 0.2185 moles, R is 0.0821 L.atm/mol.K, T is 301.6 K and V is 10 Liters. Now putting the values we get,  

P = 0.2185 moles * 0.0821 L.atm/mol.K * 301.6 K / 10 L

P = 0.541 atm

To determine the answer, we need to calculate the standard free energy change of the reaction using the equation ΔG° = -234.55 kJ/mol.

Enthalpy is a thermodynamic property of a system that expresses the heat energy involved in a process, as well as the work that may be done at a constant pressure. It is represented by the symbol "H" and is usually measured in units of Joules or Calories.

Enthalpy change (ΔH) is often used to describe the difference between the enthalpy of the reactants and the products in a chemical reaction. It can be either positive endothermic or negative exothermic, depending on whether heat is absorbed or released during the reaction.

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Sedimentation, filtration, and coagulation are the treatments that will help remove contaminants from minerals or from the pipes carrying water from a source.

Sedimentation is a process in which suspended particles settle out of water. It is one of the most basic techniques for removing particles from water. As particles settle, they become trapped in the bottom of a container or settle to the ground in an outdoor setting

Filtration is a method of removing particles from a fluid. It is a physical or chemical separation method that separates solids from fluids (liquids or gases) by adding a medium through which only the fluid can pass.

Coagulation is the process of using chemicals to remove contaminants from water. By creating a chemical reaction, coagulation destabilizes particles and causes them to clump together. This helps to remove the contaminants from the water.

Disinfection is the process of eliminating or destroying pathogens that cause infection. Disinfection eliminates harmful microorganisms by destroying or inactivating them. The disinfectant is a chemical or physical agent that is used to destroy or inactivate harmful microorganisms.

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The chemical formula for the ionic compound formed by Hg₂²⁺ and CO₃²⁻ is Hg₂²⁺  + CO₃²⁻  ⇄ HgCO₃

A chemical formula can be defined as the expression that states the number and type of atoms present in a molecule of a substance.

When a cation and anion combine to form a compound, there will be transfer of electron form one ion to another creating ionic bond in molecule formed.

The chemical formula for the ionic compound formed by Hg₂²⁺ and CO₃²⁻ is determined as follows;

Hg₂²⁺  + CO₃²⁻  ⇄ HgCO₃

Thus, the chemical formula for the ionic formed by the ions will have have electron transfer from one ion to another.

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Answer:

12.5 moles H2SO4

Explanation:

Calculate the amount, in moles, of 2.5 L of a 5.0 M sulfuric acid, H2SO4.

5.0 M means 5 moles per liter.

so in 2.5 L we have

5.0 X 2.25 = 12.5 moles H2SO4

Answer:

the answer should be d I'm pretty sure.

The human population grew from 1 billion in the year 1800 to approximately 7.8 billion in the year 2021.

In the year 1800, the estimated global human population was around 1 billion. Over the next two centuries, significant advancements in technology, medicine, agriculture, and improved living conditions contributed to a rapid increase in population.

The growth rate of the human population began to accelerate in the 20th century. By the year 1927, the global population reached 2 billion. It took just 33 years for the population to double, reaching 4 billion in 1960. The population continued to grow at an unprecedented rate, with 6 billion people on Earth by the year 1999. As of 2021, the estimated global population stands at approximately 7.8 billion.

This remarkable growth in population can be attributed to several factors, including advancements in healthcare leading to reduced infant mortality rates, improved access to education and contraception, increased agricultural productivity, and overall socio-economic development.

It's important to note that population growth has not been uniform across all regions. Different countries and regions have experienced varying rates of population growth due to factors such as fertility rates, mortality rates, migration patterns, and government policies.

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Answer:

2.25 mol

Explanation:

45 g HF x (1 mole HF/ 20.01 g)

20.01 comes from adding the molar mass of H and the molar mass of F

Answer:

Heat absorbed = mS△T

51 = ( 8.2/1000)Kg ×S (11.5)

51×1000= 8.2 (11.5)S

S = 51000/94.3

S = 540.8 J/kg K

Answer: 0.374 mol CO2

Explanation:

We can calculate the number of moles of CO, n, required to produce the specified quantity of heat. This is done by dividing the required released heat, q, by the enthalpy of formation per unit mole of the substance, \({\Delta H}{2\ mol\ CO}\), based on the chemical equation, such that:

\($$We have the following values for the variables:\displaystyle q = -147\ kJ \\\displaystyle \Delta H = -787\ kJ\)

\($$We proceed with the solution:\begin{align} \displaystyle n &= \frac{q}{ \frac{\Delta H}{2\ mol\ CO}}\\ &= \frac{-147\ kJ}{\frac{-787\ kJ}{2\ mol\ CO}}\\ &\approx \boxed{\mathbf{ 0.374\ mol}} \end{align}\)

Therefore, 0.374 mol of CO2 must be reacted in order to produce 147 kJ of energy?

The reaction time decreases as the temperature increases of the reaction mixture increases.

A sample record of results is:

An increase in temperature leads to an increase in reaction rate or a decrease in reaction time.

The increase in temperature provides more thermal energy to the reactant molecules, which leads to an increase in the average kinetic energy of the molecules. As a result, more reactant molecules have sufficient energy to overcome the activation energy barrier and undergo successful collisions, leading to an increased reaction rate.

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Answer:

Noble gases are a  set of elements in the periodic table because they don't naturally bond with other elements. *Examples ...Helium; Neon; Radon; Xenon; Argon etc

Explanation:

theyre noble gases.

Answer:

Dinitrogen pentoxide

Explanation:

There are approximately 2.8939 x\(10^2^4\) carbon atoms in 0.37 mol of procaine.  The molecular formula of procaine (C₁₃H₂₀N₂₀₂), one can see that there are 13 carbon atoms (C13) in one molecule of procaine.

Avogadro's number (6.022 x \(10^2^3\)) represents the number of particles (atoms, molecules, or formula units) in one mole of a substance

The number of molecules of procaine in 0.37 mol:

Number of molecules = 0.37 mol x (6.022 x\(10^2^3\) molecules/mol)

Number of carbon atoms = Number of molecules x 13 carbon atoms/molecule

Number of molecules = 0.37 mol x (6.022 x \(10^2^3\)molecules/mol)

= 2.22614 x \(10^2^3\)molecules

Number of carbon atoms = 2.22614 x \(10^2^3\) molecules x 13 carbon atoms/molecule

= 2.8939 x \(10^2^4\)carbon atoms

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Since HCl is a strong acid, it completely dissociates in water. Therefore, the concentration of H⁺ in the solution is equal to the initial concentration of HCl, [H⁺] = 0.250 mol/L. Therefore, the pH of the solution can be:

pH = -log(0.250) = 0.602. Therefore, the pH of the solution resulting from the mixture of HCl and NH₂ is approximately 0.602, which is closest to option (A) 5.079.

pH is a measurement of the acidity or basicity of a solution. It is the negative logarithm of the concentration of hydrogen ions in the solution. A pH value of 7 is considered neutral, while values below 7 are acidic, and above 7 are basic.

Metals are not acidic or alkaline, as acidity and alkalinity are properties of solutions rather than the metals themselves. However, when metals react with acidic or alkaline solutions, they can produce ions that can affect the pH of the solution.

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Solid potassium (K) conducts an electric current, whereas solid potassium iodide (KI) does not because solid potassium has a delocalized sea of electrons and KI has its cations and anions.

Positively charged potassium and negatively charged iodine combine to form the straightforward inorganic ionic chemical potassium iodide. It is solid at room temperature and resembles sodium chloride or table salt in terms of crystalline structure.

The major uses of potassium iodide are to treat hyperthyroidism and as a dietary supplement for those who are iodine deficient. Additionally, it is utilized as an expectorant to treat asthma and other long-term respiratory disorders, as well as to shield the thyroid gland from radiation.

When potassium iodide is dissolved in water, it splits into cations and anions, enabling free electron movement across the solution. It does not conduct electricity when it is in a dry crystal state, though, like other ionic compounds.

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Answer:

8.54g

Explanation:

we know that: n=m/Mm

where:

rearrange for m: m= n x Mm

m= 0.0490mol x 174.259g/mol

m= 8.54g

Answer:

where are the following organisms

Hello. You forgot to say that this question is about the possibility of using some type of product that prevents cut apples from becoming darker.

Answer and Explanation:

1. The problem with this activity is "What can you put on an apple slice to keep it from turning brown?" The problem in a scientific experiment is the element that provides a question about what is being observed.

2. Hypotheses are assumptions made about what was observed, in addition, hypotheses can answer the question shown in the problem. In the case of apples, the hypotheses can be: "Lemon juice is the most efficient product in delaying the blackening of cut apples." "Water is inefficient in preventing blackened cut apples." "Milk accelerates the blackness of cut apples."

3. The dependent viable is one that needs to be influenced by another element to bring about a result. In the case of the experiment with apples, the dependent variable is the blackening rate of the apple slices.

4. The independent variable, on the other hand, refers to the element that does not need any influence to cause a result, on the contrary, this variable acts on the dependent variable, influencing it. In the case of this experiment, the independent variable is the types of liquid tested to delay the blackening of cut apples.

5. Lemon was the most efficient liquid. Probably this efficiency is related to the lemon's ability to decrease the strength of antioxidants, due to its very low pH.

Answer:

3

Explanation:

PH = -Log [H+]

PH = -Log [1 × 10^-3]

PH = -Log [10^-3]

Log (10) = 1

PH = -(-3) Log (10)

PH = 3 × 1

PH = 3

Answer:

\( \boxed{8.9 \: g /cm^3}\)

Explanation:

Given:

Mass of sample= 39.2 g

Volume occupied= 4.4 cm³

To find:

Density=?

Solution:

Formula to be used,

\(\sf Density = \frac{mass}{volume} \)

\(\sf Density = \cancel{ \frac{39.2}{4.4} } = 8.9 \bar{0} \bar{9} \: g /cm^3\)

The rounder figure answer upto tenths place can be written as 8.9 g/cm³

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The volume of the gold plates in cm₃ is 2.513274 cm₃

Volume is the space occupied by a three-dimensional object“”

Volume = {mass} {density}

Given that the thickness or height of medallion, h = 2 mm = 0.2 cm

Diameter of the medallion, d = 4 cm

Radius of medallion, r = d/2 = 2 cm⁻³

The thickness of the gold plating, x = 1 μm = 10⁻⁴ cm

The density of gold = 19.3 g cm

Now we know that the shape of a medallion is cylindrical.

Hence, the volume of the medallion before platting,

Vbefore = π.r2.h = π.(2)2.0.2 = 2.513274 cm₃

Therefore, the volume of the gold-plated is 2.513274 cm₃.

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35.453 amu is the correct answer