if a pharmacist dissolves 1.2 g of a medicinal agent in 60 ml of a cough syrup having a specific gravity of 1.20. w hat is the specific gravity (to 3 decimal places) of the product if the addition of the medicinal agent increases the syrup’s volume by 0.2 ml?

The emission wavelength (nm) of excited atoms are −54.44 eV.

The equation E=hc can be used to determine the emission line's wavelength. The energy difference between the excited state and ground level is indicated here by the symbols E, h, c, and.

An atom's ground state and excited state differ in energy by a factor of 31019 J.

Atoms that resemble hydrogen, i.e. The energy levels for H, He+, Li2+, etc. are provided by:

En=Z2 = 13:61 eVn2. where n is the quantum level and Z is the atomic number.

E2=−22⋅13.61 eV22. =−13.61 eV.

E1=−22⋅13.61 eV12. =−54.44 eV.

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The molar mass of the gas, given that 3.25 g of the gas occupied 2.56 L is 30.66g/mol

To obtain the molar mass of the gas, we shall first obtain the number of mole of the gas. This can be obtained as follow:

PV = nRT

0.95 × 2.56 = n × 0.0821 × 280

Divide both sides by (0.0821 × 280)

n = (0.95 × 2.56) / (0.0821 × 280)

n = 0.106 mole

Haven obtain the mole of the gas, we shall determine the molar mass of the gas as follow:

Molar mass = mass / mole

Molar mass of gas = 3.25 / 0.106

Molar mass of gas = 30.66g/mol

Thus, the molar mass of the gas is 30.66g/mol

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Answer:

i will give you all the answers just in case  pls mark brainlist

Explanation:

1.the placement of the Sun at the center of the solar system

2.stars are not a part of our solar system

3.The improve telescope showed scientists that the solar system contained comets.

4.the placement of the Sun at the center of the solar system

5.stars that form constellations

Answer:27

Explanation:

Took the test

Answer:

30 slices of pie

Explanation:

10 colleges = 30 essays

30 essays= 60 hours of work

60 hours = ( 500*60)

30,000 calories expended = 30 slices of pie

I wouldn't recommend eating that much pie.

Answer:

In shorthand electron configuration, the electron configuration starts with the symbol of the noble gas in the previous period, followed by the additional configuration of the electrons for the given element. For example, aluminum has the atomic number 13, which is the number of protons in the nuclei of its atoms.

Explanation:

Hope this helps.

Sulpher is a substance that is more likely to be soluble in a nonpolar solvent. Thus, option D is correct.

Sulfur is insoluble in universal solvent water, due to the non-polar nature of the sulfur. Sulfur is soluble in non-polar solvents. Its non-polar nature makes the molecule insoluble in water or other polar solvents.

The covalent compounds are less-polar so they are soluble in non-polar solvents. Carbon disulfide is the best non-polar solvent to dissolve sulfur. Sulfur is also soluble in organic non-polar solvents like benzene and toluene.

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Assuming the buffer is composed of equal concentrations of a weak acid and its conjugate base, the pH of the buffer will be around 9.00. To calculate the mass of HCl that can be neutralized before the pH drops below 9.00, we need to use the Henderson-Hasselbalch equation and the acid dissociation constant (Ka) of the weak acid. With this information, we can determine the buffer capacity and the maximum amount of HCl that can be neutralized without significant changes in pH.

Answer: I believe the answer is surface tension :)

Answer:

Matter in compound having chemical bonds while in mixture matter have physical interaction.

Explanation:

We know that element is a substance that is made up of atoms. The atoms of different elements combine to form compound. These are the form of matter that have characteristic properties and having fixed chemical composition. The atoms of different elements are combine to gather through the chemical bond.

For example:

Consider the compound water. It has hydrogen and oxygen. Atoms are bonded together through chemical bond and having fixed proportion. So we can say that their interaction is chemical interaction.

While in mixture different matter combined through the physical interaction.

Atoms of different elements are not chemically bonded together.

For example:

Mixture of sand and water.

Mixture of oil and water.

Answer:follow these steps Identify the given quantity in the problem.

Identify the wanted quantity in the problem.

Establish the unit path from the given quantity to the wanted quantity using equivalents as conversion factors.

Set up the conversion factors to permit cancellation of unwanted units

Explanation:

other things that may helps

Set up each problem by writing down what you need to find with a question mark. Then set it equal to the information that you are given. The problem is solved by multiplying the given data and its units by the appropriate unit factors so that only the desired units are present at the end.

Answer:

I will answer the first one for you: 5.33

Explanation:

You can use dimensional analysis to do conversions in almost any field of math. For the first problem:

\(\frac{16 feet}{} |\frac{1 meter}{3 feet} = about 5.33\)

Answer:

0.065 meters

Explanation:

Answer:

Start by dividing the length value by 1000, so that would be

65 / 1000 = 0.065 meters

The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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Answer:

Cannot, two

Explanation:

The component elements of a compound can only be separated via a chemical reaction that breaks the atomic bonds that bind its molecules. Also, compounds are formed by 2 or more different elements.

The {H⁺} of the solution is 2.238 × 10^(-12) M.

pH is a measure of the acidity or basicity of an aqueous solution. It is defined as the negative logarithm (base 10) of the concentration of hydrogen ions ([H+]) in moles per liter. The pH scale ranges from 0 to 14, where a pH of 7 is neutral. Solutions with a pH less than 7 are acidic, while solutions with a pH greater than 7 are basic (also called alkaline).

The pH of a solution is defined as:

pH = -log[H⁺]

Rearranging the equation, we get:

[H⁺] = 10^(-pH)

Substituting the given value of pH, we get:

[H⁺] = 10^(-11.55)

[H⁺] = 2.238 × 10^(-12) M

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The feeding relationships in an ecosystem complex are all those linking different trophic levels.

The relationships between different trophic levels in a complex ecosystem are based on the connection between discontinuous levels such as for example primary consumers that may also act as secondary or even tertiary consumers.

Therefore, with this data, we can see that relationships between different trophic levels in a complex ecosystem depend on the connection of all organisms in the trophic chains that form the food web.

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Using the idea of the  molar volume of butane gas, we have 2.23 moles of water vapor.

The term reaction equation shows the conversion of reactants to products. First of all, we must get down the reaction equation as follows;

C4H10(g) + 13/2O2(g) ----> 4CO2 (g) + 5H2O(g)

From the balanced reaction equation;

1 mole of  butane gas yields 5 moles of water vapor. Since 1 mole of butane gas occupies 22.4 L. Hence;

22.4 L of butane yields 5 moles of water vapor

10 L of butane gas yields 10 L * 5 moles/22.4 L = 2.23 moles

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Answer:

hi there, are u okay . what do u need help for

Answer:

Animal cells each have a centrosome and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not

Explanation:

A spontaneous reaction is one in which the change in free energy is negative and the standard cell potential is positive.

For a redox reaction to be spontaneous, the electrode potential of the cell must be positive and this depends on the relative electrode potentials of the species involved in the reaction. A metal can not displace a metal above it in the electrochemical series from solution.

Based on this;

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So,

There's an equation that we could use in order to find frequency, and it is the next one:

This equation tells us that the energy of the photon is equal to the product of the Plank constant (h), which is 6.626*10^-34 J.s, and the frequency.

In this problem, we know the value of E and the value of h, so we need to solve for v:

Therefore, the correct answer option is A.

Answer:

Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white.

Answer:

This is because of the lone pairs present in the molecules. Bond and lone pairs of electrons have maximum mutual repulsion but lone pairs of electrons have a stronger mutual repulsion than bond pairs thus creating a bent or v shape in water and trigonal pyramidal shape in ammonia.

There are 4 pairs of electrons in water. if all were bond pairs then the bond angle would be 109.5 but because of the the two lone pairs you take away 2.5 per lone pair from 109.5. Same goes to ammonia if they were all bond pairs then it would be 109.5 but because of the one lone pair it becomes 107.

Explanation:

The penny left in sunlight felt warmer than the one left in the shade because of the absorption of radiant energy from the sun.

Sunlight contains a significant amount of energy in the form of electromagnetic radiation, including visible light, infrared radiation, and ultraviolet radiation. When the penny is exposed to sunlight, it absorbs some of this energy, causing the temperature of the penny to increase.

On the other hand, the penny in the shade is not exposed to as much sunlight and therefore absorbs less energy from the sun, resulting in a lower temperature. This is similar to how a car parked in the sun can become much hotter than a car parked in the shade, due to the absorption of radiant energy from the sun.

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Answer:

a is write

Explanation:

Why are all ionic compounds crystalline in structure?

Ionic compounds are generally hard, but brittle. ... The repulsive forces between like-charged ions cause the crystal to shatter. When an ionic crystal breaks, it tends to do so along smooth planes because of the regular arrangement of the ions.

water is a pure substance

For a voltaic cell comprised only of copper, the expected standard cell potential is 0.00 V.

In an electrochemical cell with both half-cells containing a copper electrode in a copper (II) solution, there is no difference in electrode potentials between the two half-cells.

Since the cell potential is determined by the difference in electrode potentials, the standard cell potential (Eocell) would be 0.00 V in this case.

Summary: For a voltaic cell comprised only of copper, the expected standard cell potential is 0.00 V.

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The positive charge attract negative charge body but repel similar charge body.

A positively charged dress and a negatively charged beach ball will attract each other, so Zach should not change "repel" to "attract" for these objects because opposite charges attract each other.  A negatively charged T-shirt and a positively charged chair will repel each other, so Zach should change "attract" to "repel" for these objects due to the presence of attraction between these two objects.

A negatively charged beach ball and a negatively charged T-shirt will attract each other, so Zach should change "repel" to "attract" for these objects because similar charges attract each other.  A negatively charged glove and a positively charged dress will repel each other, so Zach should change "attract" to "repel" for these objects due to the presence of opposite charges which attract each other.

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The number of moles of salt in one tablespoon would be 0.109 moles.

Recall that the number of moles of a substance is the ratio of the mass of the substance and that of its molecular mass. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

Number of moles = mass/molar mass

In this case, the molar mass is given as 58.5 g/mole while the mass of a tablespoon of NaCl is 6.37 grams.

Hence, Number of moles of NaCl is a tablespoon = 6.37/58.5

= 0.109 moles

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Answer:

Kelvin, Celsius, Fahrenheit

Explanation:

See my other answer for an explanation.

Joules, Kelvin and Calories