At the atomic, are synthetic medicines different from the natural medicines?

Answer:

4.9 L O₂

General Formulas and Concepts:

Atomic Structure

Stoichiometry

Explanation:

Step 1: Define

Identify variables

[Given] 6.4 g O₂ at STP

[Solve] L O₂

Step 2: Identify Conversions

[STP] 1 mol = 22.4 L

[PT] Molar Mass of O: 16.00 g/mol

Molar Mass of O₂: 2(16.00) = 32.00 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

4.48 L O₂ ≈ 4.9 L O₂

Answer:

to be procice, it must use small units to take mesurements

Explanation:

a.pex

Answer:

C3H6O + 4O2 → 3CO2 + 3H2O

Explanation:

I think that's the answer

Hope this helps :)

Answer: A balanced equation for the  equilibrium reaction where the aqueous bicarbonate ion, \(HCO^{-}_{3}(aq)\); decomposes to  form hydrogen ions, \(H^{+}(aq)\) and carbonate ions, \(CO^{2-}_{3}\) is \(HCO^{-}_{3} \rightleftharpoons H^{+}(aq) + CO^{2-}_{3}\).

Explanation:

A balanced chemical equation is defined as the equation which contains same number of atoms on both reactant and product side.

Hence, balanced equation for the  equilibrium reaction where the aqueous bicarbonate ion, \(HCO^{-}_{3}(aq)\); decomposes to  form hydrogen ions, \(H^{+}(aq)\) and carbonate ions, \(CO^{2-}_{3}\) is as follows.

\(HCO^{-}_{3} \rightleftharpoons H^{+}(aq) + CO^{2-}_{3}\)

Here, number of atoms present on reactant side are as follows.

Number of atoms present on product side are as follows.

Since, there are same number of atoms present  on both reactant and product side. Therefore, this equation is balanced.

Thus, we can conclude that balanced equation for the  equilibrium reaction where the aqueous bicarbonate ion, \(HCO^{-}_{3}(aq)\); decomposes to  form hydrogen ions, \(H^{+}(aq)\) and carbonate ions, \(CO^{2-}_{3}\) is \(HCO^{-}_{3} \rightleftharpoons H^{+}(aq) + CO^{2-}_{3}\).

Answer:

True

Explanation:

Answer:

4

Explanation:

Having the coefficient 4 in front of HCl and the coefficient 2 in front of H₂O balances out the equation.

Answer:

The answer is 16.12 L  

Explanation:

2.5 * 20 = 3.1 * V2

V2 = 50/3.1

V2= 16.12 L

hope this helps

The new volume can be calculated using Boyle's law. If the pressure increases from 2.5 atm to 3.1 atm, then volume decreases from 20 L to 16.1 L.

Boyle's law is a fundamental law of physics that describes the relationship between the pressure and volume of a gas at a constant temperature. It is named after the Irish physicist Robert Boyle, who first stated the law in the mid-17th century.

Boyle's law states that at a constant temperature, the pressure of a gas is inversely proportional to its volume. This means that as the volume of a gas decreases, its pressure increases proportionally.

Hence,

P1V1 = P1V2.

given,

P1 = 2.5 atm

V1 = 20 L

P2 = 3.1 atm

then V2 = P 1 V1 /P2

V2 = 2.5 atm × 20L/3.1 atm = 16.1 L.

Therefore, the new volume of the gas is 16.1 L.

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Answer:

A- by finding the atomic number minus the group number.

Explanation:

You can also find the core and valence electrons by determining or looking up the election configuration of the main group elements. The atomic number is the number of protons in the nuclei of the atoms of an element. A neutral atom has the same number of electrons as protons.

The number of core electrons be determined from the periodic table:

A. By finding the atomic number minus the group number.

To determine the number of core electrons for an atom using the periodic table.

1. Understand the structure of the periodic table:

The periodic table is a tabular arrangement of chemical elements, organized based on their atomic number, electron configuration, and chemical properties. Each element is represented by a unique symbol, and the elements are arranged in order of increasing atomic number from left to right and top to bottom.

2. Know the atomic number:

The atomic number of an element is the number of protons in the nucleus of its atoms. It is usually denoted by the letter "Z" and is a characteristic property of the element.

3. Identify the group number:

The periodic table is divided into groups (columns) and periods (rows). Each group contains elements with similar chemical properties because they have the same number of valence electrons. Valence electrons are the electrons located in the outermost energy level (shell) of an atom and are involved in chemical bonding. The group number corresponds to the number of valence electrons for elements in that group.

4. Determine the number of core electrons:

Core electrons are the electrons that occupy the inner energy levels, closer to the nucleus. These electrons do not participate in chemical reactions and are not in the outermost energy level. To find the number of core electrons for an element, you can use the following formula:

Number of Core Electrons = Atomic Number - Number of Valence Electrons.

The "Atomic Number" represents the total number of electrons in the atom, which is equal to the number of protons since atoms are electrically neutral (the number of electrons is balanced by the number of protons).

The "Number of Valence Electrons" is equal to the group number of the element because elements in the same group have the same number of valence electrons.

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The salt with the lowest molar solubility in water is Fe(OH)2.

compare the given Ksp values of each salt, as Ksp is a measure of solubility. The salt with the smallest Ksp value will have the lowest molar solubility in water.

Here are the Ksp values of each salt:

a. Ni(OH)2 (Ksp = 2.0 × 10^-15)
b. Fe(OH)2 (Ksp = 8 × 10^-16)
c. PbI2 (Ksp = 6.5 × 10^-9)
d. CaCO3 (Ksp = 3.8 × 10^-9)
e. AgBr (Ksp = 5.0 × 10^-13)

Comparing these values, we can see that the salt with the lowest Ksp value is Fe(OH)2 (Ksp = 8 × 10^-16).

Therefore, the salt with the lowest molar solubility in water is Fe(OH)2.

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The salt with the lowest molar solubility in water among the given options is Ni(OH)₂ (Ksp = 2.0 × 10⁻¹⁵).

How does the solubility product constant (Ksp) determine the molar solubility of a salt?

The solubility product constant (Ksp) is an equilibrium constant that represents the degree of solubility of a salt in water. It is determined by the concentrations of the dissociated ions in the equilibrium equation for the salt's dissolution. A lower value of Ksp corresponds to a lower molar solubility of the salt.

To determine the salt with the lowest molar solubility, we compare the given Ksp values. The salt with the lowest Ksp will have the lowest molar solubility, indicating that it is less soluble in water.

In this case, the salt Ni(OH)₂ has the lowest Ksp value of 2.0 × 10⁻¹⁵ among the given options.

Therefore, Ni(OH)₂ has the lowest molar solubility in water.

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Answer:

Molecular formula => C₃H₈O₃

Explanation:

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

Carbon (C) = 39.12%

Hydrogen (H) = 8.75%

Oxygen (O) = 51.12%

Molar mass of compound = 92.09 g/mol

Molecular formula =?

Next, we shall determine the empirical formula of the compound. This can be obtained as follow:

C = 39.12%

H = 8.75%

O = 51.12%

Divide by their molar mass

C = 39.12 / 12 = 3.26

H = 8.75 / 1 = 8.75

O = 51.12 / 16 = 3.195

Divide by the smallest

C = 3.26 / 3.195 = 1

H = 8.75 / 3.195 = 2.7

O = 3.195 / 3.195 = 1

Thus, the empirical formula is CH₂.₇O

Finally, we shall determine the molecular formula of the compound. This can be obtained as follow:

Empirical formula = CH₂.₇O

Molar mass of compound = 92.09 g/mol

Molecular formula =?

Molecular formula = Empirical formula × n

Molecular formula = [CH₂.₇O]ₙ

92.09 = [12 + (2.7×1) + 16] × n

92.09 = 30.7n

Divide both side by 30.7

n = 92.09 / 30.7

n = 3

Molecular formula = [CH₂.₇O]ₙ

Molecular formula = [CH₂.₇O]₃

Molecular formula = C₃H₈O₃

The chemical formula of the ionic compound is XY₂.

During the formation of the ionic compound between an ion X that has a charge of 2+ and ion Y has a charge of 1-, two negatively charged ions of Y are required to form a neutral ionic ionic compound when they react with X.

The chemical the formula of the ionic compound they form is as follows;

X²⁺  + 2Y⁻ ---> XY₂

Therefore, the chemical formula of the ionic compound is XY₂.

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Answer:

Their weight.

Explanation:

Weight is the measurement of gravity pushing you down, so with less gravity there would be less weight.

The astronauts expect their weight to be different on the Moon

Weight is simply defined as the gravitational pull of the earth on an object. It is measured in Newton.

The weight of an object varies with location because of gravity.

The weight of an object is related to it's mass according to the following equation:

Weight = mass × Acceleration due to gravity

Since the gravity of the Moon is lesser than that of the Eearth, the astronauts certainly knew that their weight will be different on the Moon.

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Answer: Lactate!

Explanation:Hope this helps!!!

The gas that has particles that move at a greater speed is O₂ with a mass of 32 amu at 15 degrees.

The molar mass of gas and the speed of the particles of the gas are inversely proportional. This means that the higher the molar mass of a gas, the lower will be the speed of the particles of the gas

This is in accordance with Graham's law of diffusion which states that the rate of diffusion of a gas is inversely proportional to the square of the density of the gas.

Also, an increase in the temperature of a gas will result in an increase in the speed of the particles of the gas.

However, for two gases at the same temperature, the molar mass of the gases will determine the speed of the particles of the gas.

The heavier gas will have particles that move at a lower speed.

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The null hypothesis is rejected when the chi-square value is higher than the critical value or p-value. In this case, the chi-square value of 6.4 is higher than the critical value for a p-value of 0.05, which is 3.84. Therefore, the null hypothesis is rejected.

A cross results in three phenotypes. A null hypothesis of recessive epistasis is tested. Your calculated chi-square value is 6.4. Assuming a p-value of 0.05, do you reject the null hypothesis?The answer is yes.What is a chi-square value?A chi-square value is a measure of how different two sets of data are. It compares the observed data to the expected data and generates a statistic that shows how far apart they are. It compares the observed data to the expected data and generates a statistic that shows how far apart they are. The chi-square test is a statistical hypothesis test that is used to determine if there is a significant difference between two groups of data. The null hypothesis is rejected when the chi-square value is higher than the critical value or p-value. In this case, the chi-square value of 6.4 is higher than the critical value for a p-value of 0.05, which is 3.84. Therefore, the null hypothesis is rejected.

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Answer:

The correct option is;

Element 2

Explanation:

The ionization energy is the energy required to eject an electron from a gaseous ion or atom

The ionization energy increases across the period and increases up the group

The elements with the highest ionization energy are those that have the complete octet structure in their outermost shell, which are the noble gases

Therefore, given that element 2, which has the complete octet structure in the outermost shell, then it is an element of the noble gases which have the highest ionization energy in a period, and therefore has the highest ionization energy.

On the periodic table, the element with 10 electrons is Neon, with ionization energy of 2080.68 kJ/mol which is the second highest after helium, that has only 2 electrons.

Answer: C

Explanation: I have the same question, it’s for summit, my teacher helped me with this question :)

Answer:

H % = 11.11%

O % = 88.89%

Explanation:

atomic weight of H = 1

atomic weight of O = 16

each molecule of water contains 2 atoms of H and one atom of O

hence molecular weight of water = 18

H % = 2 x 100/18 = 11.11%

O % = 16 x 100/18 = 88.89%

Answer:

-H= 11.19%

-O= 88.81%

Explanation: the answer above mine is incorrect!,  i just did it and i got it right, the answer is h= 11.19% and O= 88.81% hope it helps!

Answer:

n=mass/molar mass

mass=?,molar mass=12+(35.5)4=154g/mol.n=4.63x10²

mass=4.63x10²x154=7128g

Answer:

Ptotal= 0.794 atm

Explanation:

divide 4,500pa by 1atm or 101,325 passcal

4,500p

-----------      =   0.044atm

101,325p  

then you take 0.75 and add 0.044 which equals 0.794 atm

because 1 atm = 101,325 passcal

The mass of 2.15 mol of hydrogen sulphide (H₂S) will be 73.272 gm and the mass of  3.95 × 10⁻³ mol of lead(II) iodide, (PbI₂) will be 1.82 gm

A mole is a very important unit of measurement that chemists use.

A mole of something means you have 6.023 x 10 ²³ of that thing.

1 mole hydrogen sulphide (H₂S) = 34.08088 grams

Therefore,

2.15 mol of hydrogen sulphide (H₂S) = 34.08088 grams x 2.15 mol

                                                              = 73.272 gm

1 mol of lead(II) iodide, (PbI₂) = 461.00894 grams

Therefore,

3.95 × 10⁻³ mol of lead(II) iodide, (PbI₂) = 461.00894 grams x 3.95 × 10⁻³ mol

                                                                  = 1.82 gm

Hence,The mass of 2.15 mol of hydrogen sulphide (H₂S) will be 73.272 gm and the mass of  3.95 × 10⁻³ mol of lead(II) iodide, (PbI₂) will be 1.82 gm

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2 C4H10 + 13 O2 → 8 CO2 + 10 H2O.

A positive or negative number assigned to an atom to reflect its degree of oxidation or reduction is known as an oxidation number.

Simply said, the number assigned to each element in the chemical mixture is what is known as the oxidation number. The number of electrons which atoms within a molecule may exchange, lose, or gain when forming chemical connections with other atoms from a different element is known as the oxidation number. The oxidation state is another name for the oxidation number.

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Percent composition indicates the relative amounts of each element in a compound. For each element, the mass percent formula is: % mass = (mass of element in 1 mole of the compound) / (molar mass of the compound) x 100% or. mass percent = (mass of solute / mass of solution) x 100%.

Answer:

A

Explanation:

Have a nice day

Carbohydrates require carbon as their primary component. There is carbon in every known carbohydrate. All carbohydrates also contain hydrogen and oxygen atoms, with the exception of a few simple sugars, which only contain carbon and hydrogen atoms.

Carbon, hydrogen, and oxygen atoms make up the macromolecules known as carbohydrates. They are a significant energy source. They can be found in fruits and vegetables as sugars, starches, and fibre. What categories do the carbs fit into? Starchy meals are complex carbohydrates because they include two or more sugar units. Compared to simple carbs, complex carbohydrates' molecules digest and transform more slowly. They are widely distributed in whole-grain bread, cereals, lentils, beans, peanuts, potatoes, peas, and corn. As one of the three primary macronutrients, carbohydrates are one of the three.

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The equal volumes of 0.0300 m nh3 and 0.0150 m hcl are mixed together the concentrations of nh3 and nh4 in the reaction are  0.0075 M .

Suppose the every identical quantity is V.

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Answer:

The moon's rotation and revolution take the same time.​

Explanation:

the moon's rotation and orbit is closely synced-up with our planet's.