choose the statement below that is false. question 2 options: a) a weak acid solution consists of mostly non ionized acid molecules. b) nonelectrolyte solutions do not conduct electricity. c) strong electrolytes completely dissociate into ions in water. d) a strong acid solution consists of only partially ionized acid molecules. e) a molecular compound does not ionize in solution.

How close the magnets are together and which direction the poles are pointed to

The equilibrium constant expression for the following reaction in the forward direction the reverse reaction is not at equilibrium, and the forward reaction must occur to establish equilibrium.

\(Kc = \[\frac{[CO]^{2}[H2O]^{4}}{[CH4]^{2}[O2]^{3}}\]\)

At equilibrium, the forward and backward reaction rates are equal, and no net change occurs in the concentrations of the reactants and products in the reaction mixture. The reaction quotient (Qc) is used to determine whether a reaction is at equilibrium or not when compared to the equilibrium constant (Kc) value. If Qc = Kc, then the reaction is at equilibrium. If Qc is greater than Kc,

the forward reaction is not at equilibrium, and the reverse reaction must occur to establish equilibrium. If Qc is less than Kc, the reverse reaction is not at equilibrium, and the forward reaction must occur to establish equilibrium.

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Answer:

S2H8

Explanation:

Although it might not occur possibly, we can write the formula for disulphur octahydride

We have two elements here, sulphur and hydrogen

The multiplicity of the sulphur is di while that of the hydrogen is octa

So the formula we are looking at here is S2H8

The density of 55.3 lbs/ft³ is 0.884 g/mL.

To convert density from pounds per cubic foot (lbs/ft³) to grams per milliliter (g/mL), we can use the following conversion factors:

1 pound = 453.59237 grams

1 foot = 30.48 centimeters (cm)

1 inch = 2.54 centimeters (cm)

1 milliliter (mL) = 1 cubic centimeter (cm³)

First, we convert pounds to grams:

55.3 lbs = 55.3 lbs * 453.59237 g/lb = 25050.364 grams

Next, we convert cubic feet to milliliters:

1 ft³ = (30.48 cm)³ = 28316.8466 cm³

1 cm³ = 1 mL

Finally, we calculate the density in g/mL:

Density = (25050.364 g) / (28316.8466 mL) ≈ 0.884 g/mL

Therefore, the density of 55.3 lbs/ft³ is approximately 0.884 g/mL.

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It is necessary to provide cooling for the reaction mixture to prevent sulfuric acid from boiling. Enthalpy is -227 kJ. Heat is also emitted into the environment, and hence exothermic.

Any facility that produces sulfuric acid through the contact process of burning elemental sulphur, alkylation acid, hydrogen sulphide, organic sulphides and mercaptans, or acid sludge is referred to as a sulfuric acid plant.

The boiler's flue gas is piped into a catalytic reaction vessel. The catalyst converts extra oxygen from combustion air into SO3 in order to oxidise SO2. A condensing tower receives catalytic converter exhaust gases.

The production of fertilisers, pigments, dyes, medicines, explosives, detergents, inorganic salts, and acids, as well as petroleum refining and metallurgical operations, all utilise varied amounts of acid.

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Answer:

Intermolecular bonds

Explanation:

Physical separation is known to break intermolecular bonds. Intermolecular bonds are the bonds between molecules of a substance.

These attractive forces between molecules determines the intermolecular interactions.

Chemical changes takes place between the intramolecular bonds. Intramolecular bonds are found between atoms of a substance. These bonds are the ones that forms new compounds when a product results in a chemical reaction.

Physical separation deals with intermolecular forces of attraction between compounds.

The first wave appear after 320 seconds and after the arrival of P wave

We can use the formula TD = d × t / 100 km

TD = d × t / 100 km

= ( 4000 km × 8 s ) / 100 km

= 32000 km /s / 100 km

= 320 seconds

The first s-wave will arrived in 320 seconds after the arrival of the first p-wave

The earliest waves to reach a seismograph are known as P waves, or primary waves. The fastest seismic waves, known as P waves, can pass through solid, liquid, or gas. On the medium they travel through, they leave a trail of compressions and rarefactions

The second waves to arrive during an earthquake are called S waves, or secondary waves. They can only pass through solids and are substantially slower than P waves

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Answer:

1.666

≈ 1.67 g/cm³

Explanation:

Mass = 200g

Length = 6cm

Width = 4cm

Height = 5cm

Density = Mass/ Volume

Volume = length×width×height

\(V = 6 \times4 \times 5 \\ = 120\)

Density =

\( \frac{200}{120} = 1.6\)

Answer:

6

Explanation:

\(n_1\) = Final energy level = 2

\(R_H\) = Rydberg constant = \(10967758.3\ \text{m}^{-1}\)

\(\lambda\) = Wavelength = 410 nm

From the Rydberg formula we have

\(\dfrac{1}{\lambda}=R_H(\dfrac{1}{n_1^2}-\dfrac{1}{n_2^2})\\\Rightarrow n_2=(\dfrac{1}{n_1^2}-\dfrac{1}{\lambda R_H})^{-\dfrac{1}{2}}\\\Rightarrow n_2=(\dfrac{1}{2^2}-\dfrac{1}{410\times 10^{-9}\times 10967758.3})^{-\dfrac{1}{2}}\\\Rightarrow n_2=\pm6.01\approx 6\)

The initial energy level is 6.

Out of given data, all data is close to actual value, so all are precise but only first data is very much close to actual value so it is accurate.

When measuring data, precision and accuracy are two crucial considerations. Both precision and accuracy indicate how closely a measurement comes to the real value.

But accuracy also indicates how closely a measurement resembles a known or recognized value, while precision indicates how repeatable a measurement is, even if it is far from the acceptable value. Out of given data, all data is close to actual value, so all are precise but only first data is very much close to actual value so it is accurate.

Therefore, out of given data, all data is close to actual value, so all are precise but only first data is very much close to actual value so it is accurate.

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Answer:

filtration and chromatography

Explanation:

I hope this will help you :-)

Answer: Cellulose

Explanation:

Cellulose is a polymer made with repeated glucose units bonded together by beta-linkages. Humans and many animals lack an enzyme to break the beta-linkages, so they do not digest cellulose. Certain animals, such as termites can digest cellulose, because bacteria possessing the enzyme are present in their gut.

To make a 50.0 mL solution of 1.7 M sodium carbonate (Na₂CO3), we need to determine the mass of Na₂CO3 required.

To calculate the mass of Na₂CO3 needed, we can use the formula:

Mass = Concentration x Volume x Molar Mass

First, we convert the given volume from milliliters to liters:

Volume = 50.0 mL = 50.0/1000 L = 0.05 L

Next, we substitute the given concentration and volume values into the formula:

Mass = 1.7 M x 0.05 L x Molar Mass of Na₂CO3

The molar mass of Na₂CO3 can be calculated by adding the atomic masses of sodium (Na), carbon (C), and three oxygen (O) atoms:

Molar Mass of Na₂CO3 = (2 x Atomic Mass of Na) + Atomic Mass of C + (3 x Atomic Mass of O)

After obtaining the molar mass value, we can substitute it into the formula and perform the calculation to determine the mass of Na₂CO3 required to make the 50.0 mL solution of 1.7 M sodium carbonate.

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Answer:

The total energy reaction would be -698 kJ/mol.

Explanation:

The formula to calculate the enthalpy change of a reaction is the following:

Let's calculate the bond energy for each reactant:

- CH4: As we have 4 bonds of H - C, the bond energy is 4 x 412 kJ/mol = 1648 kJ/mol.

- O2: As we have 1 bond of O = O, but we have 2 moles of O2, we just multiply the bond energy of O = O by two: 2 x 496 kJ/mol = 992 kJ/mol.

Now, let's calculate the bond energy for each product:

- CO2: As we have 2 bonds of C - O (O - C - O), the bond energy would be 2 x 743 kJ/mol = 1486 kJ/mol.

- H2O: As we have 2 bonds of O - H (O - H - O), and 2 moles of H2O, we multiply the bond energy by the number of bonds, and the number of moles: 2 x 2 x 463 kJ/mol = 1852 kJ/mol.

Finally, we just apply the given formula, like this:

The total energy reaction would be -698 kJ/mol.

Answer:

Bundling up, starting a fire, body warmth, blankets, taking a hot shower/bath.

C4 photosynthesis is more efficient than C3 photosynthesis in tropical climates because it has a unique biochemical pathway that allows it to conserve water better.

This is especially important in hot and dry tropical regions where water is limited.

In C4 plants, the initial step of carbon fixation occurs in mesophyll cells, which are better adapted to handling high light intensities and high temperatures.

The carbon dioxide is then transported to bundle sheath cells, where it is concentrated before undergoing the Calvin cycle.

This concentration step reduces photorespiration and enhances the efficiency of carbon fixation.

Therefore, C4 plants are able to maintain high rates of photosynthesis even in tropical climates.

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An ionic compound that is neither an acid nor a base is classified as a salt. Salts are formed when an acid reacts with a base, resulting in the neutralization of their respective acidic and basic properties.

In this reaction, the acid donates a proton (H+) to the base, forming water, while the remaining ions from the acid and base combine to form the salt. Salts are composed of positively charged cations and negatively charged anions. The cation is derived from a base, while the anion is derived from an acid. However, the resulting salt does not exhibit the characteristic properties of either an acid or a base. It does not donate or accept protons in solution, making it neutral in nature. Salts have a wide range of applications, including as flavor enhancers, preservatives, and components in chemical reactions and industrial processes. They can also be found naturally in minerals and are essential for various biological processes in living organisms. In summary, an ionic compound that is neither an acid nor a base is classified as a salt. It is formed through the neutralization reaction between an acid and a base and does not exhibit acidic or basic properties in solution.

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Answer:

5.45 mL

Explanation:

Archimedes' principle tells us that the volume of water an object displaces when it is submerged is equal to the object's volume.

This means that in order to calculate the object's volume, we can calculate the amount of water it displaced:

Thus the volume of the object is 5.45 mL.

Answer:30 moles of oxygen are required if 12 moles of  are consumed.

Explanation:The given balanced equation is:

From this balanced equation, there is 2:5 mol ratio between  and  .

We are asked to calculate the moles of  required to react with 12 moles of .

It's a mol to mol conversion and the set up for this would be as:

=

So, 30 moles of oxygen are required to react with 12 moles of  .

Answer:

5 moles S x (36.02 g S/mole S) = 180.1 grams of S

Explanation:

The periodic table has mass units for every element that can be correlated with the number of atoms of that element.  The relationship is known as Avogadro's Number.  This number, 6.02x\(10^{23}\) , is nicknamed the mole, which scientists found to be a lot more catchy, and easier to write than  6.02x\(10^{23}\).  The mole is correlated to the atomic mass of that element.  The atomic mass of sulfur, S, is 36.02 AMU, atomic mass units.  But it can also be read as 36.02 grams/mole.

This means that 36.02 grams of S contains 1 mole (6.02x\(10^{23}\)) of S atoms.

This relationship holds for all the elements.  Zinc, Zn, has an atomic mass of 65.38 AMU, so it has a "molar mass" of 65.38 grams/mole.  ^5.38 grams of Zn contains 1 mole of Zn atoms.  

And so on.

5.0 moles of Sulfur would therefore contain:

(5.0 moles S)*(36.02 grams/mole S) = 180.1 grams of S

Note how the units cancel to leaves just grams.  The units are extremely helpful in mole calculations to insure the correct mathematical operation is done.  To find the number of moles in 70 g of S, for example, we would write:

(70g S)/(36.02 grams S/mole S) = 1.94 moles of S.  [Note how the units cancel to leave just moles]

Caustic potash, also known as potassium hydroxide, is a highly alkaline chemical that is widely utilised in a range of industrial and commercial applications.

One of the most common applications for potassium hydroxide solution is the manufacture of soap and other cleaning goods. When potassium hydroxide is combined with fats or oils, it reacts to make soap. Saponification is the name given to this reaction.

The solution of potassium hydroxide is also utilised in the manufacturing of biofuels such as biodiesel. It is used to make biodiesel from vegetable oils and animal fats. The potassium hydroxide functions as a catalyst, assisting in the breakdown of fatty acids in oils and fats, allowing them to be used as fuel.

Furthermore, potassium hydroxide solution is used in the pulp and paper sector to aid in the breakdown of wood fibres in the production of paper.

Potassium hydroxide solution is also employed in the production of a variety of chemicals, including fertilisers, dyes, and pigments. It can also be used to purify water, make electronic components, and perform different scientific operations.

It should be noted that potassium hydroxide is a highly corrosive material that should be handled with caution. Contact with the skin or eyes can result in irritation or chemical burns, and inhaling the fumes can be hazardous. As a result, when working with potassium hydroxide solution, suitable safety precautions must be performed.

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Answer:

B

Explanation:

The set B gives the set of particles that experience stronger attraction because the charges are greater. Therefore, option B is correct.

Electric charge is the physical property of matter. Charges makes to experience a force when placed in an electromagnetic field.

Positive and negative electric charges are the two types of charges commonly transported by charge carriers, protons and electrons. Energy is make up by the movement of charges.

In set B there are +4 and -4 two charges are present so, they give stronger attraction that set A.

Thus, option B is correct.

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The number of molecules in 10.0 gram of NaOH is 15 * 10²².

To solve this question, we need to understand some terms of mole concept,

Mole - It is the amount of substance containing same number of molecules or atoms as there are atoms in 12 gram of carbon-12 isotope.

Molecules - It is group of atoms bonded together, representing the smallest fundamental unit of a chemical compound taking part in chemical reaction.

Molecular weight - The sum of atomic masses of all atoms in molecules.

Avogadro number - It is the number of atoms, ions, electrons, molecules in one mole of substance. It is represented as NA.

NA = 6.0 * 10²³ (approx)

To calculate the number of molecules, we apply the formulae,

no. of molecules = moles * NA

moles = weight / molecular weight

moles = 10.0 / 40

          = 0.25

Substituting this value to calculate number of molecules,

no. of molecules = 0.25 * 6.0 * 10²³

                            = 15 * 10²²

Therefore the number of molecules of in 10.0 g of NaOH is 15 * 10²².

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Answer:

positive ion.

Explanation:

It lost 3 negative charges (the electrons) so the remaining atom would have a positive charge.

Neither the protons nor neutrons are lost or gained in this step, so there are no isotope structures involved.

Answer - Mass = 136.41 gram

Answer:

Because seasons are caused by the changing angles that sunlight strikes the Earth (due to it's tilted axis), a decrease in tilt would mean less extreme seasons. ... However, less tilt would mean less of a change in angle around the orbit and therefore cooler summers and warmer winters.

Answer:

All the items in the mixture will not be picked up by the magnet and therefore, all of them would be left behind

Explanation:

Ferromagnetic materials are materials that can become magnetized and are also readily attracted to a magnet or by a magnetic field. Examples of ferromagnetic materials includes, iron, cobalt, and nickel, and their alloys

Ferromagnetic materials are mainly metals while all materials exhibit some form of magnetism including diamagnetism and paramagnetism, but these are not the type of magnetism seen in everyday life

Therefore, since neither of the tomato sauce mixture, the sugar or the carrots are not ferromagnetic materials none of them will be picked up by the magnet.

Answer:

This is what I put, it hasn't been graded though...

Within the system, the energy is flowing from your hand to the ice cream cone. Energy is also flowing from the surroundings to the ice cream cone unless it's reeeeaally cold in the surroundings in which case why are you even holding an ice cream cone when it's that cold?