Sand particles have density equal to 0.70 g/mL. A teacher ordered a 22 kg bag of sand from the scientific supply company. Sand plus air (as ordered) takes up 1.3 times as much volume as the sand particles alone. What is the volume in cubic feet (ft3) of sand plus air that the teacher ordered?

I need so much help with Dimensional Analysis aaaa

pH = -log[H3O+] = -log(8.26 x 10^-5) = 4.083 (three decimal places because the concentration had three sig figs)

The refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

To calculate the kilowatt-hours (kWh) of electric energy used by the refrigerator in 30 days, we need to multiply the power rating by the total running time.

Given:

Power rating of the refrigerator = 500 W

Running time per day = 12 hours

Number of days = 30

First, we need to convert the power rating from watts to kilowatts:

Power rating = 500 W / 1000 = 0.5 kW

Next, we calculate the total energy used in kilowatt-hours (kWh) over the 30-day period:

Energy used = Power rating × Running time × Number of days

Energy used = 0.5 kW × 12 hours/day × 30 days

Energy used = 180 kWh

Therefore, the refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

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Slime can be made without glue or activator with shampoo by mixing shampoo and cornstartch in a bowl.  If desired, colour the two parts cornflour to one part water mixture using food colouring. Without glue or borax, this mixture might result in a slimy, goopy texture.

Two parts of  cornflour to one part water, then add food colouring if desired. This mixture has the ability to produce a slimy, sticky texture without glue or borax. You can make slime without glue, borax, or cornflour by mixing cornflour and water. Use 2 parts cornflour with 1 part water to produce the mixture, and you may also add food colouring if you like. The resulting slurry feels sticky and slimy and may be shaped and moulded like conventional slime. This type of slime is also entirely safe to use because it has no harmful chemicals. You may adjust the consistency of the slime by adding more or less water or cornflour, as desired.

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Answer:

Gabriella is slowing down at the same rate that Kendall is speeding up, and Franklin is not accelerating.

Gabriella is slowing down at the same rate that Kendall is speeding up, and Franklin is not accelerating. Hence option B is correct.

Acceleration is defined as the speed at which an object's velocity changes over time. The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is accelerating. Acceleration can be expressed as

Acceleration = Displacement / Time

Velocity is defined as the pace at which an item changes position while moving in one direction, as seen from a certain point of view and as measured by a specific unit of time. Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is travelling along a path.

Thus, Gabriella is slowing down at the same rate that Kendall is speeding up, and Franklin is not accelerating. Hence option B is correct.

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Glycerol is an alcohol having three hydroxyl groups (OH-) and is a part of the triglyceride, which are stored in the human body as a reserve of energy. The general formula for glycerol is C3H8O3.

In general, a fatty acid has a long hydrocarbon chain that is nonpolar, and it has a carboxyl (-COOH) group that is polar. A fatty acid with six carbon atoms is known as hexanoic acid.

The combination of glycerol and fatty acids is accomplished by a chemical reaction known as esterification or dehydration synthesis.

In this reaction, the hydroxyl group (-OH) of glycerol interacts with the carboxyl group (-COOH) of fatty acid to form an ester bond (C-O-C) and water (H2O) molecule. The chemical reaction can be illustrated as follows:

To draw the molecule of glycerol and a fatty acid with 6 carbon atoms and to show how the two combine by dehydration synthesis:

1. Draw a molecule of glycerol, which has three hydroxyl groups (OH-).

2. Draw a molecule of hexanoic acid, which has six carbon atoms and one carboxyl group (-COOH)

3. Illustrate the combination of glycerol and hexanoic acid by showing the interaction of hydroxyl group of glycerol with the carboxyl group of hexanoic acid.

4. Show the formation of an ester bond (C-O-C) and water molecule (H2O) through the esterification or dehydration synthesis process.

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The mole fraction of potassium permanganate (KMnO4) in the solution is 0.00806.

The mole fraction of potassium permanganate in the given solution can be determined using the formula for mole fraction which is:
Mole fraction = Number of moles of solute/ Total number of moles in the solution
To find the mole fraction, we first need to find the number of moles of potassium permanganate (KMnO4) in the solution.
We can use the formula for calculating the number of moles as shown
Number of moles of solute = mass of solute/molar mass of solute
The molar mass of potassium permanganate (KMnO4) is calculated as follows
Molar mass of KMnO4 = (1 x Atomic mass of K) + (1 x Atomic mass of Mn) + (4 x Atomic mass of O)= (1 x 39.1 g/mol) + (1 x 54.9 g/mol) + (4 x 16.0 g/mol)= 39.1 + 54.9 + 64.0= 158.0 g/mol

Now, we can calculate the number of moles of potassium permanganate in the solution as follows
Number of moles of KMnO4 = Mass of KMnO4 / Molar mass of KMnO4
Mass of KMnO4 = 7.1 g
Molar mass of KMnO4 = 158.0 g/mol
Number of moles of KMnO4 = 7.1 g / 158.0 g/mol= 0.04493 mol
Next, we need to find the total number of moles in the solution.
The total number of moles is the sum of the number of moles of potassium permanganate (KMnO4) and the number of moles of water (H2O).
Number of moles of water (H2O) = mass of water / molar mass of water
The mass of water is 100.0 g, and the molar mass of water is 18.0 g/mol.
Number of moles of water = 100.0 g / 18.0 g/mol= 5.5556 mol
Now, we can find the mole fraction of potassium permanganate (KMnO4) as follows:
Mole fraction of KMnO4 = Number of moles of KMnO4 / Total number of moles in the solution= 0.04493 mol / (0.04493 mol + 5.5556 mol)= 0.00806 (rounded to five decimal places)Therefore, the mole fraction of potassium permanganate (KMnO4) in the given solution is 0.00806.

Thus, the mole fraction of potassium permanganate (KMnO4) in the solution is 0.00806 .

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LiCl

because Li loses 1 electron ==> Li+

and Cl gains 1 electron ==> Cl-

Li+ Cl-

we use the criss cross rule

===> LiCl

The arrangement of the gases in terms of  deviations from ideal behavior is; chlorine > fluorine > oxygen > Nitrogen.

We know that gases tend to follow the idea gas law. The gases that have ideal behavior tend to show this behavior at high temperatures and low pressure such that the interactions between the gas molecules could be regarded as non existent.

Now; we know that the greater the molar mass of the gas, the greater the gas tends to depart from ideal behavior. As such we would tend to arrange the gases in order of decreasing molar mass.

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The mass of nitrogen gas that participated in the chemical reaction is 1.54g

HOW TO CALCULATE MASS OF AN ELEMENT:

According to this question, a chemist determines by measurements that 0.0550 moles of nitrogen gas (N2) participate in a chemical reaction.

= 28.02g/mol

Hence, the mass of the nitrogen gas that participated in the chemical reaction is calculated as follows:

Therefore, the mass of nitrogen gas that participated in the chemical reaction is 1.54g

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The predicted intermediate that can directly supply the carbon skeleton for the synthesis of a five-carbon amino acid, is a-ketoglutarate. Correct answer: letter D.

This is because a-ketoglutarate is an intermediate of the Krebs cycle, and as such can directly supply the carbon skeleton for the synthesis of a five-carbon amino acid.

Five-carbon amino acids are essential for the synthesis of proteins in the body. a-Ketoglutarate is a key intermediate in the Krebs cycle that can directly supply the carbon skeleton for the synthesis of a five-carbon amino acid.

This makes a-ketoglutarate an important molecule for the synthesis of proteins in the body.

Which intermediate would you predict may directly supply the carbon skeleton for synthesis of a five-carbon amino acid?

Group of answer choices:

A) succinate

B) malate

C) cotrate

D) a-ketoglutarate

E) isocitrate

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Explanation:

I think the notation used to represent beta is B

Answer:

\(\frac{0}{-1} \beta\)

Explanation:

A beta particle, also called beta ray or beta radiation (symbol β), is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay. There are two forms of beta decay, β− decay and β+ decay, which produce electrons and positrons respectively.[2]

Beta particles with an energy of 0.5 MeV have a range of about one metre in air; the distance is dependent on the particle energy.

Beta particles are a type of ionizing radiation and for radiation protection purposes are regarded as being more ionising than gamma rays, but less ionising than alpha particles. The higher the ionising effect, the greater the damage to living tissue, but also the lower the penetrating power of the radiation.

~Wikipedia

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Answer:

Need more information.

Explanation:

I believe you either left out info or explained the question confusingly.

Answer:

electrical in among us is kinda sus

Explanation:

Answer:

The calculated mass of one atom of oxygen-18  is approximately  2.99×10⁻²³ grams

Explanation:

The given mass of an oxygen-18 atom = 18.0042 amu

The definition of the atomic mass unit is the mass equivalent to the mass of one twelfth the atomic mass of one atom of carbon-12. The atomic mass unit is used to express the mass of an isotope of an element

1 amu = 1.66 × 10⁻²⁴ grams

Therefore;

18.0042 amu = 18.0042 ×  1.66 × 10⁻²⁴ grams ≈ 2.99×10⁻²³ grams

The calculated mass of one atom of oxygen-18 ≈ 2.99×10⁻²³ grams

The atomic mass unit can be taken as the mass in grams of one mole of the substance

Therefore, the mass of one mole of the oxygen 18 atom = 18.0042 g

chemical properties and same number of shell

Explanation:

elements in the same group have the same number of eletrons in their outermost shell and hence have the same chemical properties

The given statement "Carbon in the ocean originates from the atmosphere" is true because Carbon is one of the most vital elements on Earth and is involved in various biogeochemical cycles, including the carbon cycle.

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The correct question would be as

Carbon in the ocean originates from the atmosphere. Please select the best answer from the choices provided. True or False

A. 3 Mg + 2 AlCl3 --> 3 MgCl2 + 2 Al would not occur as written due to the Activity Series of Metals

The Activity Series of Metals is a list of metals in order of decreasing reactivity. The most reactive metals are at the top of the list and the least reactive metals are at the bottom. The metal that is considered the least active in the Activity Series of Metals is gold. Gold is a very unreactive metal, meaning that it does not easily form compounds with other elements or react with other substances. This is why gold is often used in jewelry and other decorative items, as it does not tarnish or corrode easily. Other metals that are considered to be relatively unreactive and are also located towards the bottom of the activity series include platinum and silver.

It is worth noting that the activity series of metals is not a definitive and absolute list. It is based on a specific set of conditions, such as the presence of a certain solvent or the concentration of certain ions, and the activity of the metals may change in different environments.

Additionally, the activity series can be useful to predict the outcome of displacement reactions, in which a more active metal can displace a less active metal from a compound. For example, zinc, a more active metal than copper, can displace copper ions from a copper sulfate solution to form zinc sulfate and copper metal.

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Answer:

36g

Explanation:

Given parameters:

Mass of H₂  = 4g

Unknown:

Mass of water produced  = ?

Solution:

The reactants in this experiment are hydrogen and oxygen gas. The product formed will be water, H₂O.

 Now write the reaction equation first;

                   2H₂  + O₂  →  2H₂O

Find the number of moles of Hydrogen gas;

         Number of moles  = \(\frac{mass}{molar mass}\)  

  Molar mass of H₂  = 2(1) = 2g/mol

        Number of moles  = \(\frac{4}{2}\)   = 2moles

From the balanced reaction equation;

             2 moles of H₂ will produce 2 moles of H₂O

So, mass of H₂O produced;

        Mass of H₂O = number of moles x molar mass

   Molar mass of H₂O  = 2(1) + 16  = 18g/mol

    Mass of H₂O  = 2 x 18 = 36g

We can see from the calculations that the use of 4g of hydrogen produces 36 g of water.

We know that water is produced from the equation;

2H2(g) + O2(g) ----> 2H2O(g)

Number of moles of hydrogen = 4 g/2 g/mol = 2 moles of hydrogen

From the reaction equation, we can see that 2 moles of hydrogen yields 2 moles of water.

Hence, If we use 4g  of hydrogen, we end up with 2 moles of water.

Mass of water = 2 * 18 g/mol = 36 g

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Answer:

Number 4

Explanation:

There are more in the line

The grams of 0.119 g of magnesium nitride was used up in the reaction.

To solve this problem, we need to use the ideal gas law PV = nRT where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

First, we need to convert the volume of ammonia from liters to m³ is 13.0 L = 0.0130 m³. Next, we can rearrange the ideal gas law to solve for the number of moles n = PV/RT where R = 0.08206 L·atm/(mol·K) is the gas constant.

Plugging in the values, we get

n = (1.00 atm)(0.0130 m³)/(0.08206 L·atm/(mol·K))(23°C + 273.15)

= 0.00708 mol

Now, we need to use the balanced chemical equation to relate the number of moles of ammonia to the number of moles of magnesium nitride.

From the equation, we can see that 6 moles of ammonia react with 1 mole of magnesium nitride. Therefore, the number of moles of magnesium nitride used up in the reaction is mass

= 0.00118 mol × 100.95 g/mol

= 0.119 g

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The chemical species ranked in increasing order of solubility in an aqueous solution are:

1. Insoluble solid species (precipitate)

2. Slightly soluble species

3. Moderately soluble species

4. Highly soluble species

When a chemical species is dissolved in water to form an aqueous solution, its solubility determines the amount that can be dissolved. Solubility is typically expressed in terms of grams of solute dissolved per liter of solvent. Based on solubility, we can rank the chemical species in increasing order:

1. Insoluble solid species (precipitate): These species have very low solubility and form a solid precipitate when added to water. They do not readily dissolve in water and tend to settle at the bottom of the container. Examples include many metal sulfides, carbonates, and hydroxides.

2. Slightly soluble species: These species have low solubility and dissolve to a limited extent in water. They form a relatively small concentration of solute in the solution. Examples include calcium sulfate (CaSO4) and silver chloride (AgCl).

3. Moderately soluble species: These species have a moderate solubility and dissolve to a significant extent in water. They form a relatively higher concentration of solute in the solution compared to slightly soluble species. Examples include sodium carbonate (Na2CO3) and potassium iodide (KI).

4. Highly soluble species: These species have high solubility and readily dissolve in water, forming a relatively high concentration of solute in the solution. Examples include sodium chloride (NaCl) and glucose (C6H12O6).

The solubility of a species depends on various factors such as temperature, pressure, and the nature of the solute and solvent. It is important to note that solubility is a relative measure and can vary depending on the conditions.

Solubility is a crucial property in various chemical processes, including dissolution, precipitation, and extraction. Understanding the solubility of different species helps in designing and optimizing processes such as crystallization, separation, and purification. Factors that affect solubility, such as temperature and pressure, play a significant role in industrial applications. Additionally, the concept of solubility is fundamental in fields like analytical chemistry, where it is used for quantitative analysis and determining the concentration of species in solutions.

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Answer: 2,090J

The equation to find the specific heat is determined by the equation q = mcΔT, where q = total heat, m=mass, c = specific heat, and ∆T change in temperature.

Recall that the specific heat capacity for water is 4.18J/gºC

So, plug this along with your specific values into the equation.

q = 100g * (4.18J/gºC) * (20.0ºC-15.0ºC)
q = 2090J

To obtain the final chemical equation, we need to combine the given intermediate equations in a way that cancels out the common compounds and species.

The intermediate equations are:

P4O6(s) → P4(s) + 3O2(g)

P4(s) + 5O2(g) → P4O10(s)

To combine these equations, we can multiply equation 1 by 2 to balance the number of moles of P4:

2P4O6(s) → 2P4(s) + 6O2(g)

Now, we can add equation 2 to the modified equation 1 to cancel out the common compounds (P4 and O2) and obtain the final balanced chemical equation:

2P4O6(s) + P4(s) + 5O2(g) → 2P4(s) + 6O2(g) + P4O10(s)

Simplifying the equation, we have:

2P4O6(s) + P4(s) + 5O2(g) → 2P4O10(s)

Therefore, the final chemical equation from the given intermediate equations is:

2P4O6(s) + P4(s) + 5O2(g) → 2P4O10(s)

The final balanced chemical equation from the following intermediate chemical equations is 2P4O6(s) + P4(s) + 5O2(g) → 2P4O10(s).

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In sharp contrast to elimination reactions, addition reactions are generally favored at low temperature, because enthalpy term is more likely to be negative at such temperatures.

An addition reaction is an organic reaction occur when two or more molecules combine to form a larger molecule without the loss of any atoms present in reactant. Addition reaction is favored at low temperature.

Elimination reaction is a type of organic reaction where many atoms either in groups or pairs are removed from a molecule. Elimination reaction is favored at high temperature.

Thus from the above conclusion we can say that In sharp contrast to elimination reactions, addition reactions are generally favored at low temperature, because enthalpy term is more likely to be negative at such temperatures.

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Answer:

radiation

Explanation: