Match each of the following topical dosage forms with its correct definition.
Question 13 options:
Cream
Lotion
Gel
Ointment

1. Drug mixed in approximately equal proportions of oil and water
2. Contains a higher proportion of oil than water
3. Solution of oil mixed with water
4. Type of emulsion in which the drug is mixed with an alcohol or water base

Answer:

1.44 g/cm^3

Explanation:

The equation for density is d=m/v.

Answer:

First, we need to determine the molar mass of HCl.

The molar mass of HCl = the mass of hydrogen (1.008 g/mol) + the mass of chlorine (35.45 g/mol) = 36.45 g/mol.

Next, we can use Avogadro's number (6.02 x 10^23 molecules/mol) to convert the number of molecules to moles:

6.02 x 10^24 molecules / 6.02 x 10^23 molecules/mol = 10 moles

Finally, we can use the molar mass to convert moles to grams:

10 moles x 36.45 g/mol = 364.5 grams

Therefore, the mass of 6.02 x 10^24 molecules of HCl is 364.5 grams.

Answer:

3 moles

Explanation:

A  substance can dissolve in another when they have thee same type of intermolecular interaction.

The term solubility of a solute refers to the extent to which a solute dissolve in a solvent. We must know that a substance can dissolve in another when they have thee same type of intermolecular interaction.

Thus;

a) Octane (C8H18) mixes well with CCl4 because they are both non polar substances.

b) Methanol (CH3OH) is mixed with water in all ratios because the both are polar substances.

c) NaBr dissolves very poorly in acetone (CH3 ― CO ― CH3) because acetone is only slightly polar.

Learn more about solubility:https://brainly.com/question/8591226

#SPJ1

(option B) Characterized by sharing of electrons is not true for ionic compounds.

Ionic compounds are chemical compounds formed by the transfer of electrons between a metal and a non-metal. They are composed of positively charged ions (cations) and negatively charged ions (anions) that are held together by electrostatic attractions.

Ionic compounds are formed through the transfer of electrons from one atom to another, resulting in the formation of positively charged cations and negatively charged anions. These oppositely charged ions are held together by strong electrostatic forces of attraction, forming a crystalline lattice structure.

Learn about Ionic compounds here https://brainly.com/question/1332431

#SPJ1

The total kilojoules in two tablespoons is  836.8 kJ.

To determine the total kilojoules in two tablespoons of a substance, we need to know the specific substance and its energy content per tablespoon. Different substances have different energy values, so without this information, it is not possible to provide an accurate calculation.

The energy content of food or substances is typically measured in kilocalories (kcal) or kilojoules (kJ). 1 kilocalorie is equal to 4.184 kilojoules. The energy content of a substance is often listed on food labels or in nutritional databases.

For example, if we have the energy content of a substance as 100 kilocalories (kcal) per tablespoon, we can convert it to kilojoules by multiplying it by 4.184:

100 kcal * 4.184 kJ/kcal = 418.4 kJ

So, if we have two tablespoons of this substance, the total energy would be:

418.4 kJ/tablespoon * 2 tablespoons = 836.8 kJ

It's important to note that the energy content of a substance can vary depending on its composition, density, and other factors. Therefore, it is always recommended to refer to reliable sources such as food labels, nutritional databases, or consult a qualified professional to obtain accurate information regarding the energy content of specific substances.

For more such information on: kilojoules

https://brainly.com/question/29497478

#SPJ8

Answer: .39 Moles would be needed.

Explanation: The mole-to-mole ratio of Copper (ll) chloride to Al is 3/2. We can tell by looking at the coefficients of the reactants. Al has a coefficient of 2 and CuCl2 has a coefficient of 3. The ratio of CuCl2 to Al is 3:2 or 3/2. We multiply this ratio by the number of moles of Al which .26 to find how much we need of CuCl2. Now figure out how many moles of AlCl3 you would produce from .26 moles of Al.

The statement they are properties associated with a common source to a high degree of certainty is TRUE about individual characteristics of evidence (Option C).

The expression empirical evidence is used to denote any testable source of information that can be considered scientifically testable which can be obtained by applying the scientific method and has an important grade of certainty.

Therefore, with this data, we can see that the empirical evidence is obtained by using the scientific method and it can be used to prove any situation in a police case.

Learn more about empirical evidence here:

https://brainly.com/question/1669295

#SPJ1

The speed of the proton would be 1/2000th that of the electron for their corresponding wavelengths to be equal.

The de Broglie wavelength of a particle is given by:

λ = h/p

If the wavelengths of a proton and an electron are equal, their momenta must also be equal, since h is a constant.

The momentum of a particle is given by:

p = MV

Thus: MV proton = MV electron

          Vp = Ve x (Me/Mp)

Given that a proton is approximately 2000 times heavier than an electron, we can substitute the mass ratio into the equation to get:

Vp = Vp x (1/2000)

This tells us that the speed of the proton would be 1/2000th that of the electron for their corresponding wavelengths to be equal.

More on the speed of atomic particles can be found here: https://brainly.com/question/15315577

#SPJ1

The volume in liters of 5.75 moles of CO₂ at standard temperature and pressure (STP) is 128.88L.

The volume of a given gas at STP can be calculated using the following formula;

PV = nRT

Where;

According to this question, 5.75 moles of CO₂ at standard temperature and pressure (STP). The volume of this gas can be calculated as follows;

At STP, the following applies;

1 × V = 5.75 × 0.0821 × 273

V = 128.88L

Therefore, 128.88L is the volume of the gas.

Learn more about volume at: https://brainly.com/question/12357202

#SPJ1

The phosphoric acid solution has a molarity of 0.3067 M.

The most common measure for expressing solution concentration is molarity (M), which is calculated by dividing the solute's mass in moles by the volume of the solution in litres: litres of solution/moles of solute equals M.

The term "molarity" (M) refers to the quantity of solute in moles per litre of solution. A clean 1-L volumetric flask should be halfway filled with distilled or deionized water to create a 1 M solution. Slowly add 1 formula weight of the chemical to the flask. Let the compound to completely dissolve, gently turning the flask as needed.

To know more about molarity visit:-

https://brainly.com/question/8732513

#SPJ1

1. The rms speed of O₂ molecules at 427 K is 576.9 m/s

2. The rms speed of He atoms at 427 K is 1631.7 m/s

The rms speed of the various elements can be obtained as follow:

1. For O₂ molecules

rms speed = √(3RT / μ)

rms speed of O₂ molecules = √(3 × 8.314 × 427 / 0.032)

rms speed of O₂ molecules = 576.9 m/s

2. For He atoms

rms speed = √(3RT / μ)

rms speed of He atoms = √(3 × 8.314 × 427 / 0.004)

rms speed of He atoms = 1631.7 m/s

Learn more about rms speed:

https://brainly.com/question/4413278

#SPJ1

Atomic m. Element Atomic no. Symbol

1.0079u Hydrogen 1 H

4.0026u Helium 2 He

6.941u Lithium 3 Li

★ Atomic number : The number of protons in one atom of an element is known as atomic number.

The symbol for every chemical element that has an atomic number less than 5 and atomic mass greater than 8.3 u are hydrogen H, helium He, lithium Li and atomic masses 1,4 and 6.94 respectively in the periodic table.

A periodic table is an arrangement of the elements in which they are classified on the basis of the number of electrons, neutrons, and protons present in their nucleus and shell of them.

Hydrogen has one electron in it and atomic mass is also one, helium comes in the second number with 4 amu and lithium comes in the third number containing 6.94 mass with it.

Therefore, hydrogen H, helium He, lithium Li and atomic masses 1,4 and 6.94 respectively in the periodic table contain symbols for every chemical element that has an atomic number less than 5 and atomic mass greater than 8.3 u are hydrogen H.

learn more about the periodic table, here:

https://brainly.com/question/16923845

#SPJ2

At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

For more such questions on equilibrium, click on:

https://brainly.com/question/517289

#SPJ8

Answer:

9.10% dextrose

Explanation:

To find the mass percent, you need to use the following equation:

                               mass (g) of solute
Mass Percent  =  ---------------------------------  x  100%
                              mass (g) of solution

You can plug the given values into the equation and solve to find the mass percent of dextrose. But first, you need to calculate the mass of the solution.

Mass (solute): 25.0 g

Mass (solution): 250.0 g + 25.0 g = 275 g

                                25.0 grams
Mass Percent  =  ------------------------  x  100%
                                 275 grams

Mass Percent  =  0.0909 x 100%

Mass Percent  =  9.10%

A solution of dextrose contains 25.0 g solute in 250.0 g water. 9.10% is the percentage by mass of dextrose in this solution.

A component's concentration in a combination or compound can be expressed as a mass percent, also known as a weight percent. It shows how much of the total mass of the solution or mixture is made up of the solute's (component's) mass. In chemistry, mass percent is frequently employed and stated as a percentage.

Mass Percent  =     mass (g) of solute/       mass (g) of solution x  100%

Mass (solute): 25.0 g

Mass (solution): 250.0 g + 25.0 g = 275 g

Mass Percent  =25.0 grams /    275 grams x  100%

Mass Percent  =  0.0909 x 100%

Mass Percent  =  9.10%

To know more about percentage by mass, here:

https://brainly.com/question/31309409

#SPJ7

A 5.00 g sample of hydrated barium chloride BaCl\(_2\).nH\(_2\)O is heated to drive off the water after heating 4.26 g of anhydrous barium chloride BaCl\(_2\) remains 2 is the  value of n in the hydrate formula  BaCl\(_2\).2H\(_2\)O.

An inorganic substance with both the formula BaCl\(_2\) is barium chloride. It is among the most popular barium salts that dissolve in water. Like the majority of those other water-soluble barium salts, it burns with a yellow-green hue and is a white powder. It is also extremely poisonous.

Moreover, it is hygroscopic, changing to the colorless crystals with a salty aftertaste known as BaCl\(_2\).nH\(_2\)O dihydrate. In the laboratory as well as industry, it is only sometimes used. 

BaCl\(_2\).nH\(_2\)O + heat \(\rightarrow\) BaCl\(_2\) + nH\(_2\)O

Mass of BaCl\(_2\).nH\(_2\)O before heating= 5.00 grams

Mass of anhydrous BaCl\(_2\) after heating = 4.26 grams.

mass of nH2O= 5.00 grams –4.26 grams = 0.74 grams

Moles of BaCl\(_2\) = 4.26/208=0.02048mol

Moles of H\(_2\)O =0.74/18=0.040111mol

For BaCl\(_2\)  = 0.02048/0.02048=1

For H\(_2\)O =0.04111/0.02048 = 2

the formula is BaCl\(_2\).2H\(_2\)O

Therefore, 2 is the  value of n in the hydrate formula BaCl\(_2\).2H\(_2\)O.

To learn more about barium chloride, here:

https://brainly.com/question/15296925

#SPJ1

Answer:

B. Poor conductor.

Explanation:

It cannot be A, as only 1 metal is not solid at room temp.

It cannot be C, as most metals are ductile.

It cannot be D, as most metals are malleable.

This leaves B, which is not true about metals, as a lot are very good conductors.

Answer:

The correct answer is 0.373 M.

Explanation:

The reaction will be,

H3PO4 (aq) + 3KOH (aq) ⇔ 3H2O (l) + K3PO4 (aq)

Based on the given information, the molarity of the solution KOH is 0.100 M, the volume of the solution given is 112 ml or 0.112 L.

The molarity of the solution with respect to KOH is,

M = Moles/Volume of Solution (liters)

Moles of solute = Molarity * Volume of solution

Moles = 0.100 M * 0.112 L

= 0.0112 moles

From the reaction it is clear that 3 moles of KOH needed 1 mole of H3PO4, thus, 0.0112 moles of KOH will require,

1/3 * 0.0112 = 0.00373 moles of H3PO4

The volume of the H3PO4 solution is 10 ml or 0.01 L.

The molarity of the solution will be,

M = Moles/ Volume of Solution (liters)

M = 0.00373/0.01 = 0.373 M

Thus, the concentration of the solution is 0.373 M.

The concentration of the H3PO4 would be 0.37 M

Going by the balanced equation of the reaction:

\(3KOH + H_3PO_4 ---> 3H_2O + K_3PO_4\)

The mole ratio of KOH to H3PO4 is 3:1.

Using the equation: CaVa/CbVb = 1/3

What we are looking for is Ca:

Ca = CbVb/3Va

              = 0.1 x 112/3 x 10

                 = 0.37 M

More or calculations involving neutralization reactions can be found here: https://brainly.com/question/7305038?referrer=searchResults

Answer:

The main difference is that neutrons are neutral while protons are positive.

Explanation:

Neutrons have nor charge and protons have a positive charge. Hope this helps!

Answer:

Protons: Determine the element

Neutrons: Is for the Average atomic mass or AMU for short.

Explanation:

Answer:

See below.

Explanation:

The atomic number of lead (Pb) is 82, which means it has 82 electrons. The electronic configuration of lead is

1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² 6p²

The orbital diagram for the valence electrons of lead (Pb) is

↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓

s s p p p p d d

2 1 6 2 6 2 10 10

|||||||||

1 2 3 4 5 6 7 8

The notation ↑↓ represents a pair of electrons with opposite spins.

To determine if lead (Pb) is diamagnetic or paramagnetic, we need to look at whether there are any unpaired electrons. Based on the orbital diagram, we can see that all the electrons in the valence shell are paired, meaning that lead (Pb) is diamagnetic.

Answer:

Increased

Explanation:

The partial pressure of H₂, given that the vapor pressure of water is 17.5 torr and total pressure of the gases is 750 torr, is 732.5 torr

The partial pressure of dry gas is given by the following formula:

Total pressure = Partial pressure of dry gas + pressure of wet gas

From the question given above, the following data were obtained as follow:

The partial pressure of H₂ gas can be obtained as follow:

Total pressure = Partial pressure of dry gas + pressure of wet gas

750 = Partial pressure of H₂ + 17.5

Collect like terms

Partial pressure of H₂ = 750 - 17.5

Partial pressure of H₂ = 732.5 torr

Thus, we can conclude that the partial pressure of H₂ is 732.5 torr

Learn more about partial pressure:

https://brainly.com/question/15577259

#SPJ1

The daughter isotope (a decay product)of O-15 = N-15(Nitrogen 15)

Radioactivity is the process of unstable isotopes to stable isotopes by decay, by emitting certain particles,  

O-15 emits positron particles ₁e⁰, so the atomic number decreases by 1, the mass number is the same

Reaction

 \(\tt _8^{15}O\Rightarrow _7^{15}N+_1^0e\)

The mass number of the daughter isotope = 15, atomic number = 7

If we look at the periodic system, the element with atomic number 7 is Nitrogen (N)

If 100.0 moles of H₂ and 40.0 moles of O₂, react to produce water, H₂ one is the limiting reactant.

When a chemical reaction is complete, the limiting reagent—also known as the limiting reactant or limiting agent—is the reactant that has been completely consumed. Since the reaction cannot proceed without this reagent, the amount of product that can be produced is constrained. Excess reagents or excess reactants are any reagents that are present in amounts greater than those necessary to cause a reaction with the limiting reagent.

Since the amount of product produced when the limiting reagent interacts entirely is defined as the theoretical yield, the limiting reagent must be identified in order to calculate the percentage yield of a reaction.

The limiting reactant is H₂ because it is the reactant that controls the amount of product produced. When 100 moles of H₂ and 40 moles of O₂ react, all of the H₂ will have been consumed, but there will still be O₂ left over. This means that the reaction was limited by the H₂ and that is the limiting reactant. The solution can be determined by using the following equation:

n(H₂) = 100.0 moles

n(O₂) = 40.0 moles

n(H₂) / (n(O₂) / 2) = ratio of H₂ to O₂

100.0 moles / (40.0 moles / 2) = 5.0

Since the ratio of H₂ to O₂ is 5.0, this indicates that there is more H₂ than O₂ and therefore H₂ is the limiting reactant in the reaction.

To know more about moles, visit:

https://brainly.com/question/20486415

#SPJ1

Step 1 - Finding the stoichiometry of the reaction

The given reaction is:

To find the stoichiometry of the reaction in moles, we just have to "read" the bigger numbers that come before the formulas of the substances:

1 mole of C5H12 reacts with 8 moles of O2 thus producing 5 moles of CO2 and 6 moles of H2O

Since the exercise is specifically asking us about the relation between C5H12 and CO2, we can simplify this statement to:

1 mole of C5H12 produces 5 moles of CO2

Step 2 - Converting this relation to a relation in grams

To convert moles to grams, we just need to multiply the number of moles by the molar mass of the substance.

Since the exercise is giving us the mass of C5H12, it would be interesting to convert its number of moles to mass (its molar mass is 72 g/mol):

We can now rewrite the statement in step 1 as:

72g of C5H12 produce 5 moles of CO2

Step 3 - Finding how many moles of CO2 will be formed

To find the moles of CO2 that will be formed, we can set the following proportion:

Step 4 - Converting moles to volume

The molar volume of a gas in STP conditions (standard pressure and volume) is 22.4 L/mol, which means that each mole of gas occupies 1 L. Since we have formed 1.07 moles of CO2, we have:

The volume of CO2 that would be formed is thus 23.96L.

Explanation:

Charge flow occurs in solution by ions carrying positive or negative charges. Oxidation always occurs at the Anode and Reduction always at the Cathode. Electron flow through the metal is from the anode to the cathode.

Explanation:

For a Galvanic - Voltaic Cell, electron flow is from the anode to the cathode. The following diagram gives reactions at electrodes and direction

Answer:

7

Explanation:

The pH of water is 7.

 pH is the convenient scale for expressing the level of acidity or alkalinity of aqueous solutions.

An acidic solution has a pH value less than 7.

As pH decreases, the acidity of solutions increases.

Neutral solutions have a pH of 7.

An alkaline solutions has a pH greater than 7 and the level of alkalinity increases as the pH increases.

  Water has a pH of 7 because the concentration of hydrogen and hydroxyl ion is equal.

Explanation:

The relationship between units of length, mass, and volume can be described by the following formulas:

Length x Width x Height = Volume

For example, if a box has dimensions of 2 meters x 3 meters x 4 meters, the volume of the box is 24 cubic meters (2 x 3 x 4 = 24).

Volume x Density = Mass

For example, if a box has a volume of 24 cubic meters and a density of 500 kg/m^3, the mass of the box is 12,000 kilograms (24 x 500 = 12,000).

Mass / Volume = Density

For example, if a box has a mass of 12,000 kilograms and a volume of 24 cubic meters, the density of the box is 500 kg/m^3 (12,000 / 24 = 500).

These formulas demonstrate the relationships between units of length, mass, and volume. Length and width are used to calculate the volume of an object, mass and volume are used to calculate density, and volume and density are used to calculate mass.

Most biologically significant elements have low atomic masses and adhere to the octet rule.This rule states that an atom would be most secure when it has eight electrons in its outer, or valence, shell.

The hypothesis that main-group elements typically bind in a way that each atom gets eight electrons within its valence shell, providing it the same electrical configuration as just a noble gas, is reflected in the octet rule, a chemical rule of thumb.

Hydrogen, beryllium, and boron do not contain enough electrons to form an octet.In hydrogen, there is just one valence electron, and it has just one place where it can bond to another atom.

to know more about biologically visit:

https://brainly.com/question/28584322

#SPJ1

Convex lenses refract light inward toward a focal point. Light rays progress through the edges of a convex lens and are bent most.

convex lenses are across in the middle. Rays of light that pass through the lens are conducted closer together (they converge). A convex lens is a meet lens. When parallel rays of light pass through a convex lens the refracted rays cross at one point called the principal focus.

. A convex lens is a connecting lens. When parallel rays of light pass through a convex lens the refracted rays merge at one point called the principal focus.

So we can conclude that Convex Lens. Concave Lens; It is known as a converging lens as light rays, when passed through this lens, tends to bend towards each other. It is known as a Convex Lens

Learn more about Convex Lens here: https://brainly.com/question/28039799

#SPJ1