A 226.4-l cylinder contains 65.5% he(g) and 34.5% kr(g) by mass at 27.0°c and 1.40 atm total pressure. what is the mass of he in this container?

The base-10 logarithm of the number of chlorine atoms is 23.971.

Calculate the number of chlorine atoms that are present in 66.05 g of dichloromethane, CH₂Cl₂. When you have the number, take its log (base 10) and enter it with three decimal places and without units.

Step-by-Step Explanation:

First, determine the molar mass of CH₂Cl₂:

Carbon (C): 12.01 g/mol

Hydrogen (H): 1.01 g/mol (each, so 2.02 g/mol for H₂)

Chlorine (Cl): 35.45 g/mol (each, so 70.90 g/mol for Cl₂)

Total molar mass of CH₂Cl₂ = 12.01 g/mol + 2.02 g/mol + 70.90 g/mol = 84.93 g/mol

Calculate the moles of CH₂Cl₂ in 66.05 g:

66.05 g / 84.93 g/mol = 0.7774 mol CH₂Cl₂

Since each molecule of CH₂Cl₂ contains 2 chlorine atoms, calculate the moles of chlorine atoms:

0.7774 mol CH₂Cl₂ x 2 = 1.5548 mol Cl atoms

Convert moles of chlorine atoms to the number of atoms using Avogadro's number (6.022 x 10²³ atoms/mol):

1.5548 mol x 6.022 x 10²³ atoms/mol = 9.36 x 10²³ chlorine atoms

Take the logarithm base 10 of the result:

log10(9.36 x 10²³ )= 23.971

Therefore, the logarithm (base 10) of the number of chlorine atoms in 66.05 g of dichloromethane, CH₂Cl₂, is 23.971.

Answer:

24 N

Explanation:

we have that an object of mass 6 kg has an acceleration of[tex]4 m/s^2[/tex] to find out the value of the unknown force that is applied we use the following formula

[tex]F= m.a[/tex]

The unit in which the force is expressed is in Newtons

[tex]N= kg.\frac{m}{s^2}[/tex]

[tex]F= 6.0 Kg. 4.0 \frac{m}{s^2}\\ F= 24 N[/tex]

The amount of the applied force is 24 N.

The net force on an object is determined by applying Newton's second law of motion.

F = ma

where;

F = 6 x 4

F = 24 N

Thus, the amount of the applied force is 24 N.

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Carbon fixation is a part of photosynthesis where CO2 is added to RuBP to form 3-PGA and eventually glucose. The process is catalyzed by the enzyme RuBisCO and also involves the stages of reduction and regeneration.

Carbon fixation is a process in photosynthesis where carbon dioxide (CO2) combines with a five-carbon sugar, ribulose bisphosphate (RuBP), to form a six-carbon compound. This reaction is catalyzed by an enzyme called RuBisCO. The six-carbon compound is then broken down into two molecules of 3-phosphoglycerate (3-PGA). This cycle, known as the Calvin cycle, involves not only fixation, but also the stages of reduction and regeneration. Reduction uses ATP and NADPH to convert the 3-PGA into glyceraldehyde 3-phosphate (G3P), some of which is used to build glucose. The remaining G3P is used to regenerate RuBP, using additional ATP, which allows the cycle to continue with more carbon fixation.

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The question is about the combined gas law, which factors in pressure, volume and temperature changes in a gas sample. By inserting given values into the combined gas law equation, the final pressure comes out as approximately 1.558 atm.

The question pertains to the principles of gas laws, particularly the combined gas law, which states that pressure, volume and temperature of a gas have an interlinked relationship, and thus change proportional to each other, provided the amount of gas is kept constant.

If we denominate the initial conditions as P1, V1 and T1 (in Kelvin), and the final conditions as P2, V2 and T2 (also in Kelvin), then the combined gas law can be written as:

P1*V1/T1 = P2*V2/T2

We know that P1=1.25 atm, V1=3.0 L, and T1=29°C = 302.15 K. The final Volume V2=2.2 L and final temperature T2=11°C = 284.15 K.

Substituting these values into the equation:

1.25 * 3.0/302.15 = P2 * 2.2/284.15

By calculating, we find that P2 = 1.558 atm, which is the final pressure of the gas.

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Answer:

 What is the electron configuration of an element with atomic number 20?  1s2 2s2 2p6 3s2 3p6 4s2

Explanation:

Answer: B) An element’s oxidation number increases because it lost electrons.

Explanation:

A redox reaction is a chemical reaction in which one or more electrons are transferred between the reactants, causing a change in their oxidation states.

The oxidation state or oxidation number is defined as the sum of positive and negative charges of an atom, which indirectly indicates the number of electrons that the atom has accepted or yielded.

By accepting electrons, the oxidation state of an atom decreases, becoming more negative, and therefore, it is reduced. On the other hand, an element that yields electrons increases its oxidation number and oxidizes.

In this way, an element’s oxidation number increase because it lost electrons, becoming a more positive ion.

Answer:

Cl35 and Cl37.

Explanation:

That would be Cl35 and Cl37 . Two isotopes of the gas chlorine.

Answer:

The correct answer is option C, that is, andesitic.

Explanation:

Andesite is the term used for a fine-grained extrusive rocks family, which are generally light to dark gray in appearance. They generally weather to different shades of brown. Andesite mostly comprises plagioclase feldspar minerals and may also comprise pyroxene, biotite, or amphibole as the dark silicate minerals. It generally does not comprise olivine or quartz.

Answer: 4 atoms

Explanation: Since carbon atom valency is 4 hence it forms 4 bonds with other 4 atoms.

As we know that carbon has atomic number-6 and electronic configuration 1s2 2s2 2p2

And it has 4 electrons in outer shell. These 4 electrons forms bind with other atoms.

Final answer:

Aristotle's ideas were favored over Democritus' because of his immense influence and the prevailing rationalist approach of the time which prioritized logic over empirical observation, leading to Aristotle's four-element theory of matter being accepted while Democritus' atomic theory was overlooked until much later.

Explanation:

Aristotle was considered more correct than Democritus during their time period because Aristotle was an incredibly influential philosopher, and his ideas were readily accepted by many. While Democritus had postulated that all matter was made up of tiny, indivisible particles called atoms, it was Aristotle's theory that everything was composed of four elements: earth, air, fire, and water that prevailed. The cultural and intellectual climate of the time favored logic and rational thought over empirical scientific methods, which meant that experimental verification of theories, like those of Democritus, wasn't pursued. Therefore, Aristotle's ideas held sway for nearly two thousand years before science recognized the validity of Democritus' concept of atoms.

When atoms loose or gain electrons  in chemical reactions they form ions on loosing electrons they form cations and on gaining electrons they form anions.

An ion is defined as an atom or a molecule which has a net electrical charge. There are 2 types of ions :1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion . As they are oppositely charged they attract each resulting in the formation of ionic bond.

Ions consisting of single atom are mono-atomic ions while which consists of two or more ions are called as poly-atomic ions . They are created  by chemical interactions . They are very reactive in their gaseous state  and rapidly react with oppositely charged ions  resulting in neutral molecules.

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In a volcanic reaction, two moles of hydrogen sulfide and sulfur dioxide react to form three moles of sulfur and two moles of water. Given 6.41 moles of hydrogen sulfide, 9.615 moles of sulfur would be formed. This reaction explains the presence of sulfur deposits in volcanic areas and contributes to the removal of hydrogen sulfide from volcanic emissions.

In the given reaction: 2H₂S(g) + SO₂(g) → 3S(s) + 2H₂O(g), hydrogen sulfide (H2S) and sulfur dioxide (SO2) are converted into sulfur (S) and water (H2O). This is a common reaction that occurs during volcanic activities when gases are emitted. It explains the presence of sulfur deposits found in volcanic areas.

As indicated by the stoichiometry of the reaction, for each two moles of hydrogen sulfide reacted, three moles of sulfur are produced. Therefore, for the complete reaction of 6.41 moles of H2S, you would expect to form 3/2*6.41 = 9.615 moles of sulfur.

The reaction is an example of redox (reduction-oxidation) process. Here, hydrogen sulfide is oxidized to water, while sulfur dioxide is reduced to sulfur. The reaction, besides leading to the creation of sulfur deposits in volcanic regions, also contributes to the removal of hydrogen sulfide one of the gases found within volcanic emissions.

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Final answer:

Solids have a definite shape and volume, while liquids have a definite volume but their shape changes. Liquids and gases are both fluids, but gases do not have a definite shape.

Explanation:

A solid differs from a liquid in that it has a definite shape and a specific volume, while a liquid has a definite volume but its shape changes depending on the container it is in.

A liquid differs from a gas in that it does not have a definite shape and its molecules are closely packed together, while gas molecules are more spread out and can freely move around.

A liquid is similar to a gas in that both are considered fluids, meaning they can flow and take the shape of their container.

Plasma is a state of matter in which the particles are highly ionized and can conduct electricity. It does not have a definite shape or volume, and is similar to a gas in that its particles are not tightly packed together.

Answer: NADPH and ATP

Explanation:

An action potential arriving at the presynaptic terminal causes voltage-gated Ca²+ channels to open, allowing calcium ions to enter the cell and triggering the release of neurotransmitters into the synaptic cleft.

When an action potential reaches the axon terminal, it depolarizes the membrane and opens voltage-gated Ca²+ channels. Calcium ions enter the cell and initiate a signaling cascade that causes synaptic vesicles containing neurotransmitter molecules to fuse with the presynaptic membrane. This leads to the release of neurotransmitters into the synaptic cleft.

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