Calculate number of molecules in 5.3 g of sodium carbonate Na2CO3

The pressure of the gas when the temperature changes from -75.0°C to 1000.0°C will be approximately 9.51 atm.

Gay-Lussac's law states that the pressure exerted by a given quantity of gas varies directly with the absolute temperature of the gas.

It is expressed as;

P₁/T₁ = P₂/T₂

Given that:

We substitute our values into the expression above.

P₁/T₁ = P₂/T₂

P₁T₂ = P₂T₁

\(P_2 = \frac{P_1T_2}{T_1}\\ \\P_2 = \frac{1.480\ *\ 1273.15 }{198.15} \\\\P_2 = 9.51 \ atm\)

Therefore, the final pressure is 9.51 atm.

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Answer:

A, Chlorine, Cl

Explanation:

Answer:

Yes it's balanced

Explanation:

on the left side, it contains

1 zn and 2 hydrogen and 2 chlorine

while on the right side it contains

1 zn 2 chlorine and 2 hydrogen

Answer:

Argon

Explanation:

It's atomic number is 18

hope that's it

Answer:

0.31 g

Explanation:

What is the mass of 2.3 x 1021 atoms of bromine?

1.8 x 1023 g

1.7 x 1043 g

0.31 g

3.4 x 1012

1 mole of Br atoms weigh 80 gm and contain 6.022 X 10^23 atoms

? gm contain 2.3 X 10^21 atoms

set up a ratio

80/(6.022 X 10^23) = ?/ (2.3 X 10^21)

?=80 X (2.3 X 10^21)/(6.O22 X 10^23)

? = 8O X (2.3/6.022) X 1 0^-2

? =0.306 gm

so the answer is

0.31 g

The calculated formula masses to 133.5 amu, we find that the substance with a formula mass closest to 133.5 amu is (d) AlCl3. Therefore, the answer is option D.

To identify the substance with a formula mass of 133.5 amu, we need to calculate the formula mass of each given substance and compare it to 133.5 amu.

(a) MgCl2:

The formula mass of MgCl2 can be calculated by adding the atomic masses of magnesium (Mg) and chlorine (Cl).

Mg: atomic mass = 24.31 amu

Cl: atomic mass = 35.45 amu

Formula mass of MgCl2 = (24.31 amu) + 2(35.45 amu) = 95.21 amu

(b) SCl:

The formula mass of SCl can be calculated by adding the atomic masses of sulfur (S) and chlorine (Cl).

S: atomic mass = 32.07 amu

Cl: atomic mass = 35.45 amu

Formula mass of SCl = 32.07 amu + 35.45 amu = 67.52 amu

(c) BCl:

The formula mass of BCl can be calculated by adding the atomic mass of boron (B) and chlorine (Cl).

B: atomic mass = 10.81 amu

Cl: atomic mass = 35.45 amu

Formula mass of BCl = 10.81 amu + 35.45 amu = 46.26 amu

(d) AlCl3:

The formula mass of AlCl3 can be calculated by adding the atomic mass of aluminum (Al) and 3 times the atomic mass of chlorine (Cl).

Al: atomic mass = 26.98 amu

Cl: atomic mass = 35.45 amu

Formula mass of AlCl3 = 26.98 amu + 3(35.45 amu) = 133.78 amu. Option D

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The reduction potentials of two elements provide information about the redox reaction between those elements, specifically regarding the process of oxidation and reduction. Option C

C. The reduction potentials indicate which element will be oxidized and which element will be reduced. In a redox reaction, one element undergoes oxidation, where it loses electrons, and another element undergoes reduction, where it gains electrons.

The reduction potential values of the elements can determine the relative tendencies for oxidation and reduction. The element with a higher reduction potential is more likely to be reduced (gain electrons), while the element with a lower reduction potential is more likely to be oxidized (lose electrons).

A. The reduction potentials also indirectly provide information about whether electrons will be gained or lost by the oxidized atom. Since oxidation involves the loss of electrons, the element with the lower reduction potential, which is more likely to be oxidized, is associated with electron loss.

Conversely, the element with the higher reduction potential, which is more likely to be reduced, is associated with electron gain.

B. The reduction potentials do not directly indicate which element is more commonly found in nature. The abundance or occurrence of elements in nature is unrelated to their reduction potentials.

D. The reduction potentials are not related to the electronegativity difference between the two elements. Electronegativity is a measure of an atom's tendency to attract electrons in a chemical bond and is distinct from reduction potential, which focuses on the tendency to undergo reduction or oxidation in a redox reaction.

Option C

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The glowing splint in the reaction of hydrogen gas and oxygen gas to form water provides the activation energy for the reaction.

A chemical reaction involves the combination of two or more substances to yield a new substance which is different from the starting materials. It may also involve the break up a substance.

Since energy is required for a chemical reaction to take place, the glowing splint in the reaction of hydrogen gas and oxygen gas to form water provides the activation energy for the reaction.

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Answer:

Nocturnal animals, such as owls, tend to have wide pupils and several rod cells in their retina because wide pupil allow more light to enter the eyes and the rods cells in the retina are sensitive to dim light and are vital for night vision.

Answer:

its sodium hydroxide

Explanation:

Answer:

Atoms form chemical bonds to satisfy the octet rule and to become stable.

Answer:

1, 4, 5, 6

Explanation:

Answer:

1,4,5,6

Explanation:

1) pH Scale. This scale expresses the acidity of a solution, in other words, the concentration of hydrogen ions.

So, numbers between 0 and 6.99 mean that the solution is acidic, and numbers between 7.01 and 14 mean that the solution is basic. 7.0 is neutral.

11.2 is the most basic solution because it is more close to 14.

Answer:

81.65 g CO2

Explanation:

Answer: sand paper against wood

Explanation:

The concentration of sodium in the soft drink in mass percent is 9.179485 x 10⁻³ %.

Percentage by mass, mass %, is a measure of concentration that indicates the mass of solute per mass of solution. In other words, the mass percent of a component in the solution is defined as the ratio of the mass of the component to the mass of the solution, expressed as a percentage.

mass % = (mass of solute / mass of solution) x 100

In the case of a soft drink which contains 28 mg of sodium in 305 g of H₂O, sodium is the solute and the solution is the mixture of sodium and H₂O.

mass % = (mass of solute / mass of solution) x 100

mass % = (28 mg / 28 mg + 305 g) x 100

mass % = (28 mg / 305028 mg) x 100

mass % = (9.179485 x 10⁻⁵) x 100

mass % = 9.179485 x 10⁻³ %

Hence, the mass percent of sodium in the soft drink is 9.179485 x 10⁻³ %.

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Answer:

Volunteering helps the teens gain new skills necessary for the job market such as leadership, communication skills, dependability, time management, and decision making.

Explanation:

The Hidden Values of Volunteering

Learn New Skills. One fantastic thing that volunteering can offer you is a new understanding of your own abilities. ...

Test for Your Future. An added side effect of volunteering is that it gives you an opportunity to try out possible careers, majors, and opportunities. ...

Meet New People. ...

Accomplish Something Important.

HOPE THIS HELPED ❤✨

The average kinetic energy of the particles is reduced by a factor of (723/819)2 = 0.60, assuming the substance is an ideal gas.

The energy an object possesses as a result of its motion is known as kinetic energy. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The relationship between kinetic energy and an object's mass and square of its velocity is direct.

When an object is moving, it has kinetic energy, which is computed using the formula KE = 1/2mv2, where m is the object's mass and v is its velocity. Calculating the amount of energy required to halt a moving object is just one practical use for the fundamental physics idea of kinetic energy.

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This is a tricky question, according to the definition of molecule, which is a group of atoms bonded together to form a compound, therefore this definition would not match what the question is asking, Carbon dioxide is made of Carbon and Oxygen atoms, not molecules, therefore assuming these definitions, none of these could be the answer, the correct answer would be DIFFERENT ATOMS. Therefore the best answer will be letter D

Answer:

Scientia

Explanation:

Sample Essay On What Science Means to You The word 'science' is derived from the Latin word 'Scientia' which means knowledge. Therefore, science is about gaining knowledge either through observing, studying, experience, or practice.

Answer:

The list is limited to 20 most important contributors or, if less, a number sufficient to account for 90% of the provenance. The listed Reaction acts as a link to the relevant references for the measurement. The Measured Quantity is normaly given in the original units; in cases where we have reinterpreted the original measurement, the listed value may differ from that given by the authors. The quoted uncertainty is the a priori uncertainty used as input when constructing the initial Thermochemical Network, and corresponds either to the value proposed by the original authors or to our estimate; if an additional multiplier is given in parentheses immediately after the prior uncertainty, it corresponds to the factor by which the prior uncertainty needed to be multiplied during the ATcT analysis in order to make that particular measurement consistent with the prevailing knowledge contained in the Thermochemical Network.

Explanation:

The student pulling out the pH electrode from the titration beaker and rinsing it off with DI water into a waste container several times during the titration will not significantly affect the measured equivalent mass.

This is because the equivalent mass of a substance is determined by the stoichiometry of the reaction, which is not influenced by the pH electrode or the rinsing process. However, it is important to note that if the student is rinsing the electrode with a significant amount of water, it could dilute the solution and affect the accuracy of the titration. Therefore, it is recommended to use a minimal amount of water during the rinsing process to minimize any potential dilution effect.

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If there are 4 moles of O2, 0.6667 moles of the C6H12O6 are present.

If there are 4 moles of oxygen present. In that case, we can use the balanced chemical equation for glucose combustion to calculate the number of moles of glucose required to react with it.

According to the equation, one mole of glucose reacts with six moles of oxygen to produce six moles of carbon dioxide and six moles of water. The number of moles of glucose required to react with it is calculated by dividing the number of moles of oxygen by six.

So, if 4 moles of oxygen are present, 0.6667 moles of glucose must react with it.

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Answer:

The volume of Component 1 is 36 cubic inches.

Explanation:

To calculate the volume of a composite solid, we need to determine the individual volumes of the different components and then add them together.

In this case, the composite solid consists of multiple components with the following dimensions:

Component 1:

Length: 4 inches

Width: 3 inches

Height: 3 inches

To find the volume of Component 1, we multiply the length, width, and height together:

Volume of Component 1 = Length x Width x Height = 4 in x 3 in x 3 in = 36 cubic inches

Therefore, the volume of Component 1 is 36 cubic inches.

Please provide the dimensions of the remaining components of the composite solid, and I will calculate the total volume by summing up the individual volumes.

Answer:juhygjdkeExplanation:

Mendelevium is named for Dmitri Mendeleev who produced one of the first periodic tables.

Abelson first found neptunium in 1940 after uranium had been bombarded by neutrons from the cyclotron at Berkeley, California. ... The element was named after the planet Neptune, which is the first planet beyond Uranus.

Answer in explanation

Explanation:

neptunium was named after the discovery of the planet neptune in september 23 1846

mendelevium was named as dimitri mendeleev

Answer: Biocapacity is the ecosystems' capacity to produce biological materials used by people and to absorb waste material generated by humans, under current management schemes and extraction technologies.Biocapacity is usually expressed in global hectares.

Explanation:

The atomic number of an atom is the number of protons in the nucleus of the atom, while the mass number is the total number of protons and neutrons in the nucleus. The atomic number is unique to each element and determines the identity of the element, while the mass number is a measure of the mass of the atom and can vary within an element.

Atoms are electrically neutral when the number of protons in the nucleus is equal to the number of electrons orbiting the nucleus. This means that the positive charge of the protons is balanced by the negative charge of the electrons, resulting in an overall neutral charge for the atom.

The atomic number of each atom represents the number of protons in the nucleus of the atom. This number is unique to each element and determines the identity of the element. For example, the atomic number of hydrogen is 1, which means that it has one proton in its nucleus and is therefore a unique element. The atomic number is used to arrange the elements in the periodic table and is an important property of atoms.

Deleted answer. ......

Answer:

0.0025Litters

Explanation:

2.5ml= 2.5x10^-3l

2.5ml= 0.0025l

Answer:

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Explanation: