predict whether each of the following molecules is polar or nonpolar. drag the appropriate items to their respective bins.

The expression 7.0x\(10^7\) ÷ 2.0x\(10^4\) can be expressed in proper scientific notation as 3.5x10^3.

To express the division 7.0x\(10^7\) ÷ 2.0x\(10^4\) in proper scientific notation, we need to perform the division and adjust the result to the appropriate format.

Dividing the numbers, we get:

7.0x\(10^7\) ÷ 2.0x\(10^4\)= 3.5x\(10^{(7-4)\)= 3.5x\(10^3\)

The result of the division is 3.5, and we adjust the exponent by subtracting the exponent of the divisor from the exponent of the dividend (7 - 4 = 3).

Therefore, the proper scientific notation representation of the division 7.0x\(10^7\) ÷ 2.0x\(10^4\) is 3.5x\(10^3\).

Scientific notation is a way to express numbers using a coefficient (in this case, 3.5) multiplied by a power of 10 (in this case, 10^3). It allows for more concise representation of very large or very small numbers.

In this case, the division resulted in a number that is smaller than the dividend and has a positive exponent, indicating a smaller magnitude compared to the original numbers. The coefficient represents the significant digits of the result, while the power of 10 represents the scale or magnitude of the number.

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Answer:

I can tell you some ways in which the reaction of Nitrogen and Hydrogen could be changed to alter the equilibrium.

Changing the pressure: If the pressure is increased, there will be more collisions between the molecules and this will increase the rate of the forward reaction. As a result, the equilibrium will shift to the left, leading to a decrease in the number of molecules of NH3.

Changing the temperature: If the temperature is increased, the kinetic energy of the molecules will increase, leading to more collisions between the molecules. This will increase the rate of the forward reaction and shift the equilibrium to the left.

To model these changes in a simulation, you could use the temperature slider to increase or decrease the temperature of the mixture and observe the changes in the equilibrium. You could also use the pressure slider to increase or decrease the pressure of the mixture and observe the changes in the equilibrium. Additionally, you can use the pause button to observe the number of particles at any point in time.

Answer:

0.31 mole

Explanation:

The following data were obtained from the question:

Mass of SF6 = 45.0 g

Number of mole of SF6 =..?

Next, we shall determine the molar mass of SF6.

This can be obtained as follow:

Molar mass of SF6 = 32 + (19×6)

Molar mass of SF6 = 32 + 114

Molar mass of SF6 = 146 g/mol

Finally, we shall determine the number of mole in 45 g of SF6 as follow:

Molar mass of SF6 = 146 g/mol

Mass of SF6 = 45.0 g

Number of mole of SF6 =..?

Number of mole = mass /Molar mass

Number of mole of SF6 = 45 /146

Number of mole of SF6 = 0.31 mol

Therefore, 0.31 mol is present in 45 g of SF6.

The empirical formula of any ionic compound can be determined by balancing the charges on the ions to form a neutral compound.

Here are four binary ionic compounds that could be formed from the given ions:

These are just a few examples of binary ionic compounds that could be formed from the given ions.

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Answer:

Filtration

Explanation:

Metal carbonate is insoluble, it is possible to filter off the unreacted substances leaving the desired salt solution

When there is an increase in an activity, like sales or manufacturing, the overall amount of an expense, known as a fixed expense, does not change.

Thus, Normal definitions typically include the phrase within a relevant or appropriate range of activity since a change is likely to take place at fixed expense either an exceptionally high or low volume or expense.

Of course, the rent will probably need to adjust if sales quadruple or fall to 20% of the average level. However, as the extreme circumstances are outside of the relevant range for short-term analysis, the current rent of $2,000 is regarded as a fixed expense.)

The following are some instances of costs that are probably set within a fair range of retail sales, The yearly pay for the shop manager.

Thus, When there is an increase in an activity, like sales or manufacturing, the overall amount of an expense, known as a fixed expense, does not change.

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The concertation of oxygen is 0.0086  M while the concentration of nitrogen is  0.032 M

From the ideal gas law, we have

P V = n RT

Let us take it that the volume that the gas occupies is 1 L

Mole fraction of N₂ = 0.78

Mole fraction of O₂ = 0.21

Mole fraction of noble gases = 0.01

We have to keep in mid that air is mere a mixture of the gases mentioned above

1 atm . 1L = n * 0.082L.atm/mol.K * 298K

n = 1 L.atm / 0.082L.atm/mol.K * 298K → 0.0409 moles

We know that;

N₂ moles / Total moles =0.78 * 0.0409 mol = 0.032 moles N₂

O₂ moles / Total moles = 0.21 * 0.0409 mol = 0.0086 moles O₂

Concentration of N₂  = 0.032 moles/ 1 L = 0.032 M

Concentration of O₂ = 0.0086 moles/ 1 L = 0.0086  M

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Missing parts;

Use the ideal gas law to calculate the concentrations of nitrogen and oxygen present in air at a pressure of 1.0 atm and a temperature of 298 K. Assume that nitrogen comprises 78% of air by volume and that oxygen comprises 21%. Express your answers using two significant figures separated by a comma.

Answer:

The image appears to have some words cropped out. Nonetheless, "receptor" would seem to be the most appropriate term here.

It is TRUE that when we add salt to a pot of boiling water or sugar to a pitcher of iced tea, we expect that the solute will completely dissolve.

What is Solubility?

The concentration of the saturated solution is the solubility of a solute. The amount of solute that may dissolve in the solvent at a particular temperature is known as a saturated solution. If the solute has completely dissolved in the solvent, the mixture is said to be an unsaturated solution.

When a solute dissolves in water, the vapor pressure of the solvent decreases and because of this boiling point increases and freezing point decreases.

Therefore, the solute (salt or sugar) will dissolve completely in (solvent) boiling water.

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Answer: 380 J. Please mark

Explanation:

An error during DNA replication would create a gene mutation.

During DNA replication, the genetic information in a cell is copied to make new DNA molecules. However, mistakes can occur during this process, leading to changes in the DNA sequence, which can result in a mutation. Mutations can also be caused by exposure to environmental factors, such as radiation or chemicals, which can damage the DNA molecule directly or affect the cellular processes involved in DNA replication.

Mutations can have a variety of effects on the organism, ranging from no effect to causing serious health problems or even death. Gene mutations can also be inherited from a parent, which can result in genetic disorders or predisposition to certain diseases. Therefore, it is important to understand the mechanisms of gene mutations and their potential impacts on organisms.

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Answer:

The physical and human forces that work in combination to form and transform the world, for example, erosion, the water cycle, migration or urbanisation. Geographical processes can operate within and between places.

The chemical formula for copper(II) sulfate is CuSO4.

Copper(II) sulfate is a chemical compound that is made up of copper, sulfur, and oxygen. It has the chemical formula CuSO4 and is commonly referred to as "blue vitriol" or "bluestone." Copper(II) sulfate can be prepared by reacting copper oxide or copper metal with sulfuric acid. It is a blue-colored crystalline solid that dissolves easily in water.

Copper(II) sulfate has many uses in industry and can be used as a fungicide, herbicide, pesticide, and in the manufacture of other chemicals. It is also commonly used in schools and laboratories as a reagent in chemical reactions and experiments.

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Answer:Frogs breathe through gills underwater to get oxygen and when frogs are adults they breathe through their lungs to get oxygen.

Explanation:

The boiling point of liquid octane when the external pressure is 0.727 atm is 388.9 K.

What do you mean by boiling point?

Boiling point is the temperature at which the vapor pressure of a liquid equals the external pressure acting on the surface of the liquid, and the liquid starts to boil and transform into a gas. At the boiling point, the molecules in the liquid gain enough kinetic energy to overcome the intermolecular forces holding them together, and they escape from the surface of the liquid as gas molecules. The boiling point of a substance is a physical property that is influenced by the strength of the intermolecular forces, as well as external factors such as pressure and atmospheric conditions. The boiling point can be used to identify and characterize different substances.

We can use the Clausius-Clapeyron equation to solve this problem:

ln(P2/P1) = (-ΔHvap/R) x (1/T2 - 1/T1)

where P1 and T1 are the normal boiling point conditions (1 atm and 399 K), P2 is the external pressure (0.727 atm), ΔHvap is the molar heat of vaporization (36.5 kJ/mol), R is the gas constant (8.31 J/mol·K), and we need to solve for T2.

First, let's convert the molar heat of vaporization to J/mol:

ΔHvap = 36.5 kJ/mol = 36,500 J/mol

Now we can plug in the values and solve for T2:

ln(0.727/1) = (-36,500/R) x (1/T2 - 1/399)

ln(0.727) = (-36,500/8.31) x (1/T2 - 1/399)

-0.3176 = -4396.4 x (1/T2 - 0.0025)

1/T2 - 0.0025 = 0.0000723

1/T2 = 0.0025723

T2 = 388.9 K

Therefore, the boiling point of liquid octane when the external pressure is 0.727 atm is 388.9 K.

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The given question is incomplete, the complete question is:

A chemist adds 200.0 ml of a 0.52M barium chlorate (Ba(CIO3)2) solution to a reaction flask. Calculate the mass in grams of barium chlorate the chemist has added to the flask. Round your answer to significant digits.

Answer:

The correct answer is 32 grams.

Explanation:

Based on the given solution, the molarity of barium chlorate solution given is 0.52 M, this shows that the solution will comprise 0.52 moles in 1 L or 1000 ml of the solution.  

Therefore, in 200 ml, it will comprise 0.52/1000 × 200 moles of Ba(ClO₃)₂,  

= 0.52/1000 × 200 = 0.104 moles

The molecular mass of Ba(ClO₃)₂ is 304.23 gram per mole

So, the mass of Ba(ClO₃)₂ in 0.104 moles will be,  

= 304.23 g/mol × 0.104

= 31.639 grams or 32 grams.  

Answer:

to hold it when the experiment is being done to show changes taking place during the process.

A piece of ice cube is placed on the watch glass which cover a reaction system is to determine the progress of the reaction. The ice cube melts over the watch glass indicating the phase change of the reactant.

Phase change of a substance is the change in phase or state of it. For example solid to liquid called melting and solid to gas called sublimation similarly, liquid to gas called vaporization.

Solids or liquids when heated to their meting point or boiling point the solids melts and the liquids vaporize.  

In an experiments of heating solid crystals in a hot water bath is an example of sublimation. If we cover the crystal pot by a watch glass and place an ice cube over the watch glass, we can observe the ice starts melting.

When the solid crystals starts to sublime and to vaporize , the heat over the watch glass make the ice changes to water. Therefore, the ice cube on the top of watch glass indicate the phase changes.

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The type of movement that occurs in the plate movement listed above include the following:

These are gigantic pieces of the Earth's crust and uppermost mantle and are made up of oceanic crust and continental crust.

A convergent boundary as the name implies occurs when lithospheric plates are moving towards one another.

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The instantaneous rate of reaction at 17 minutes is approximately -0.178 mol dm⁻³

To find the instantaneous rate of reaction at 17 minutes, we can use the concept of differential calculus and estimate the slope of the tangent line at t=17 on the graph of rate versus time.

To do this, we can use the formula for the slope of a line

slope = (change in y) / (change in x)

In this case, the "y" values are the rates of reaction and the "x" values are the times. We want to find the slope at t=17, so we can choose two points that are very close to t=17, such as t=15 and t=20. Then, we can use these values to estimate the slope at t=17

slope = (rate at 20 min - rate at 15 min) / (20 min - 15 min)

slope = (0.135 - 0.223) / (20 - 15)

slope = -0.178

This slope represents the instantaneous rate of reaction at t=17. However, since it has a negative value, it means that the rate of reaction is decreasing at t=17.

Therefore, the instantaneous rate of reaction at 17 minutes is approximately -0.178 mol dm⁻³

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Biotechnology is the use of living organisms or other biological systems in the manufacture of drugs or other products or for environmental management, as in waste recycling: includes the use of bioreactors in manufacturing, microorganisms to degrade oil slicks or organic waste, genetically engineered bacteria to produce human hormones, and monoclonal antibodies to identify antigens.

Biotech offers the possibility of improving human health, the environment, and agriculture while creating more sustainable modes of production.

The new volume of the gas sample is approximately 3.6 L.

According to the ideal gas law, PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the gas constant, and T is temperature in Kelvin. If pressure is constant, we can use the formula V1/T1 = V2/T2 to find the new volume of the gas sample.

V1/T1 = V2/T2

V2 = (V1 x T2)/T1

V2 = (3 L x 300 K) / 250 K

V2 = 3.6 L

Therefore, the new volume of the gas sample is approximately 3.6 L. As the temperature of the gas sample increased from 250 K to 300 K, the volume increased proportionally since pressure was held constant.

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The IUPAC name for the compound shown is 3-ethyl-2,2-dimethylpentane.

International Union of Pure and Applied Chemistry is referred to as IUPAC. The terminology for naming organic compounds has been provided by IUPAC. The root name, prefix, and suffix are the three components that make up an IUPAC name.

There are five carbon atoms in the longest chain. Consequently, pent is the structure's root name. Choose the longest chain where the substituents are represented by the fewest numbers.

On the longest chain, three substituents are present. It consists of one ethyl group and two methyl groups. One ethyl group and two methyl groups are substituted at C-2 and C-3, respectively. Therefore, 3-ethyl-2,2-dimethyl will be the prefix. Alkane makes up the functional group. Therefore, the suffix is ane.

This ends up naming the compound as 3-ethyl-2,2-dimethylpentane.

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Answer: 1 M \(BeCl_2\) > 1 M KCl = 2 M \(CH_3CH_2CH_2OH\) > 1 M \(C_12H_{22}O_{11}\)

Explanation:

\(\pi =iCRT\)

\(\pi\) = osmotic pressure = ?

i = vant hoff factor

C= concentration in Molarity  

R= solution constant

T= temperature

a) 1 M \(BeCl_2\)

i = 3

\(BeCl_2\rightarrow Be^{2+}+2Cl^-\)

Thus Concentration of ions = \(3\times 1M=3M\)

b) 1 M KCl

i = 2

\(KCl\rightarrow K^{+}+Cl^-\)

Thus Concentration of ions = \(2\times 1M=2M\)

c) 2 M \(CH_3CH_2CH_2OH\)

i = 1 ( as it doesnot dissociate)

Thus Concentration of ions = \(1\times 2M=2M\)

d) 1 M \(C_12H_{22}O_{11}\)

i = 1  ( as it doesnot dissociate)

Thus Concentration of ions = \(1\times 1M=1M\)

Thus order from highest to lowest osmotic pressure is:

1 M \(BeCl_2\) > 1 M KCl = 2 M \(CH_3CH_2CH_2OH\) > 1 M \(C_12H_{22}O_{11}\)

between cold hot so i guess regular

Answer:

374oC

critical temperature (oC)

Tubes containing water at several temperatures. Note that at or above 374oC (the critical temperature for water), only water vapor exists in the tube.

I hope this helps

Answer:

Meaning, Advantages & Disadvantages of - Osmosis, Multiflash Distillatiob

Explanation:

Advantages - It assists equalising concentration of solute on two sides of membrane. Reverse Osmosis is used for efficient water softening, it is easy to maintain.

Disadvantages - It needs a lot of energy. A lot of pressure is required for deionisation. Water acidity level increases, as minerals get deionised.

Advantages - Its Cost efficient , distillation uses waste heat. It has High gain output ratio. Quality of feedwater is less significant, compared to reverse osmosis.

Disadvantages - It has high operating cost in case of waste heat unavailability. High temperature imply high corrosion & scale formation.

The mass in grams of 4.60 x 10^23 atoms is approximately 9.17 g.

To find the mass in grams of 4.60 x 10^23 atoms, we need to consider the molar mass and Avogadro's number. Avogadro's number (6.022 x 10^23) represents the number of atoms or molecules in one mole of a substance.

First, we need to determine the molar mass of the substance in question. Let's assume we are dealing with a specific element, such as carbon (C), which has a molar mass of approximately 12.01 g/mol.

To calculate the mass in grams, we can use the following formula:

Mass (in grams) = (Number of atoms / Avogadro's number) x Molar mass

Substituting the given values:

Mass (in grams) = (4.60 x 10^23 atoms / 6.022 x 10^23) x 12.01 g/mol

Calculating the expression:

Mass (in grams) = (0.763 mol) x 12.01 g/mol

Mass (in grams) = 9.17 g

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Answer:

The volume is decreasing at a rate of 30 cm³/min.

Explanation:

From the question given above, pressure (P) and volume (V) are related by the following equation

PV = C

C => constant

If we make P the subject of the above, we shall have:

P = C/V

From the equation above (i.e P = C/V),

We can say that P is inversely proportional to V. This implies that as P is increasing, V will be decreasing and also, as P is decreasing, V will be increasing.

Considering the question given above, the pressure (P) is increasing at a rate of 30 kPa/min. Therefore, the volume will be decreasing at a rate of 30 cm³/min.