1- A sample of gas is in a 3.00 L contain at a pressure of 740.0 mmHg. What is the new pressure of the sample if the container's volume is reduced to 1.25 L? Show work.​

The measure of the length of events and the duration of intervals between events is time.

The duration of events or the gaps between them can be measured, compared, or even ordered using time. The lengthy period of time that the Earth's geologic history takes up is known as geologic time. Starting at the beginning of the Archean Eon  formal geologic time runs until the present. Geology is defined as the "Science of the Earth."

Geology is the fundamental Earth science that examines how the earth created, its structure and composition, and the various forces acting on it. It is sometimes known as geoscience or earth science.

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Answer:3.935g/cm3

Explanation:39.35 g. /10cm3 = 3.935g/cm3

10 cm³ of metallic cylinder has a mass of 39.35 g. The density of this cylinder is 3.935 g/cm³.

Density is a measure of the amount of mass per unit volume of a substance. It is an intensive physical property, meaning that its value does not change depending on the size of the object.

Density is calculated by dividing an object’s mass by its volume.

The density of water is 1,000 kg/m³ at 4°C. The unit of density is kg/m³ (kilogram per cubic meter). The SI unit of density is kg/m³

Density = mass/volume

            = 39.35 g/10 cm³

            =3.935 g/cm³.

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Answer:

A

Explanation:

I sad A because water is changeable doesn't have fixed shape or volume water depend on the area or the temperature or other things .

A. They have performed an experiment once and reported their findings.

Answer:

the answer is calcium

Explanation:

There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Option E is correct option.

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet. Out of given options, calcium element could be used in industry to control electron flow. Calcium belongs to alkaline earth metals that is group 2 of periodic table.

Therefore, the correct option is option E.

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Answer:

Characteristics. They are all relatively inert, corrosion-resistant metals. Copper and gold are colored. These elements have low electrical resistivity so they are used for wiring.

Explanation:

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Mass of the produced Mass of PCI5 = 0.67 mol x 208.98 g/mol = 141.54 g.

Mass is the measure of an object's resistance to acceleration when a force is applied. It is a fundamental property of all objects and is measured in kilograms (kg) in the International System of Units (SI). Mass is related to weight, which is the force of gravity acting upon an object. Weight is a measure of the gravitational attraction between two objects. Mass, however, is an intrinsic property of an object, and does not depend on its location.

The balanced chemical equation for the reaction is:

2Cl2 + P → PCI3 + PCI5

The first step is to convert the given masses of Cl2 and P to moles.

Moles of Cl2 = 94.8 g / 70.908 g/mol = 1.34 mol

Moles of P = 20.7 g / 30.9737 g/mol = 0.67 mol

Since the reaction equation is a 2:1 ratio, the moles of PCI5 produced is equal to the moles of P, or 0.67 mol.

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Answer:

Kc = [B₃]²/[A₂]³  = 0.40

Explanation:

3A₂ ⇄ 2B₃  

Given at equilibrium =>  [A₂] =2.5 and [B₃] = 2.5

Kc = [B₃]²/[A₂]³ = (2.5)²/(2.5)³ = (2.5)⁻¹ = 0.40

The systematic name of the compound is 2,2,3,3-tetramethylbutane.

The parent chain in this compound consists of four carbon atoms, indicated by the central chain of Cs in the diagram you provided. The prefix "but" in the name indicates that there are four carbon atoms in the parent chain.

The four methyl groups are attached to different carbon atoms in the parent chain. We can indicate the position of each methyl group by numbering the carbons in the parent chain. In this case, we can number the carbons starting from the left side of the parent chain, so that the first methyl group is attached to the second carbon, the second methyl group is attached to the third carbon, the third methyl group is attached to the second-to-last carbon, and the fourth methyl group is attached to the last carbon. This gives us the substituent groups 2,2,3,3-tetramethyl-.

Finally, we combine the parent chain name and the substituent groups to get the full name: 2,2,3,3-tetramethylbutane.

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Explanation:

Crude is classified, based on density, as light, medium, heavy, or extra heavy. It can also be classified, based on sulfur content, into a sour and sweet category.

Answer:

19.2 g

Explanation:

Step 1: Write the balanced equation

P₂O₅(s) + 3 H₂O(l) ⇒ 2 H₃PO₄

Step 2: Calculate the moles corresponding to 5.29 g of H₂O

The molar mass of H₂O is 18.02 g/mol.

5.29 g × 1 mol/18.02 g = 0.294 mol

Step 3: Calculate the theoretical yield of phosphoric acid, in moles

The molar ratio of H₂O to H₃PO₄ is 3:2. The theoretical yield of H₃PO₄ is 2/3 × 0.294 mol = 0.196 mol

Step 4: Calculate the mass corresponding to 0.196 moles of H₃PO₄

The molar mass of H₃PO₄ is 97.99 g/mol.

0.196 mol × 97.99 g/mol = 19.2 g

The mass of 4.35 moles of potassium chloride is 324.14 grams. Potassium chloride (KCl) is a chemical compound made up of potassium and chlorine.

Potassium chloride (KCl) is a chemical compound composed of potassium and chlorine. It is commonly used as a salt substitute for people on low-sodium diets, as well as a fertilizer, a source of potassium in food additives, and a component of some medical solutions. Potassium chloride can also be used in the production of various chemicals, including explosives and pharmaceuticals.

The molar mass of potassium chloride (KCl) is 74.55 g/mol (39.10 g/mol for K and 35.45 g/mol for Cl).

To calculate the mass of 4.35 moles of KCl, we can use the following formula:

mass = moles × molar mass

So, the mass of 4.35 moles of KCl is:

mass = 4.35 moles × 74.55 g/mol

mass = 324.14 g

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To determine the number of moles in each substance, we need to divide the mass of the substance by its molar mass.

67.42 g Si:

The molar mass of Si is 28.0855 g/mol (rounded to 4 decimal places). Therefore, the number of moles of Si is:

67.42 g / 28.0855 g/mol = 2.3992 mol (rounded to 4 decimal places).

11.82 g gold:

The molar mass of gold is 196.9665 g/mol (rounded to 4 decimal places). Therefore, the number of moles of gold is:

11.82 g / 196.9665 g/mol = 0.060 mol (rounded to 3 decimal places).

28.8 g Br₂:

The molar mass of Br₂ is 159.808 g/mol (rounded to 3 decimal places). Therefore, the number of moles of Br₂ is:

28.8 g / 159.808 g/mol = 0.1803 mol (rounded to 4 decimal places).

Therefore, the number of moles in each substance is:

2.3992 mol Si

0.060 mol gold

0.1803 mol Br₂.

the supraspinatus muscle is the most commonly injured muscle in this situation because it is responsible for initiating shoulder abduction, which is an important movement in the throwing motion.

The solution are as follows :-

1.Sarah's mother most likely strained her trapezius muscle. The trapezius muscle is a large triangular-shaped muscle that runs along the upper back and neck and is responsible for moving the shoulder blades and supporting the arms. When picking up a heavy object such as a baby, the trapezius muscle is activated, and if the muscle is strained or overused, it can cause sharp pain between the shoulder blades. The fact that Sarah's mother experiences this pain only when picking up her baby suggests that the weight of the baby is causing the strain.

2.The most likely type of injury to the baseball pitcher is a rotator cuff injury. The rotator cuff is a group of muscles and tendons that surround the shoulder joint and are responsible for stabilizing and moving the shoulder. Pitchers are at high risk for rotator cuff injuries due to the repetitive and forceful motion of throwing a baseball. The specific muscles that are most likely involved in a rotator cuff injury are the supraspinatus, infraspinatus, teres minor, and subscapularis muscles. However, the supraspinatus muscle is the most commonly injured muscle in this situation because it is responsible for initiating shoulder abduction, which is an important movement in the throwing motion.

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Answer: \(K=\frac{[NO]^2}{[N_2]^1[O_2]^1}\)

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as \(K\)

For the given chemical reaction:

\(N_2(g)+O_2(g)\rightleftharpoons 2NO(g)\)

The expression for \(K\) is written as:

\(K=\frac{[NO]^2}{[N_2]^1[O_2]^1}\)

The planet, known as Proxima b, may be warm enough for liquid water to exist on its surface and hence be suitable for life because it is located within the star's "habitable zone."

Applying Kepler's laws: The sun is at the centre of elliptical planetary orbits, according to the first law. Second Law: The radius vector from the sun to a planet covers the same area in exactly the same amount of time. Third Law: For every planet, there is a constant relationship between the cube of the elliptical semimajor axis and the square of the period of revolution.

Since the angular momentum is changing at a rate of zero, the angular momentum must be constant, which implies that the rate of change of the swept-out area for the celestial body's orbit must also be constant. This leads to Kepler's Second Law, which states that celestial objects in orbit cover equal regions in similar amounts of time.

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Answer:

C.) protons and neutrons

Explanation:

Most atoms contain proton(s), neutron(s), and electron(s). Within the nucleus of an atom, there are protons and neutrons. Electrons are located outside of the nucleus.

Answer:

The stratosphere

Explanation:

Answer:

among these which is not a base is CaSO4

The Kp of the reaction is seen to be  1.75 * 10^4

A high Kp value indicates that the equilibrium is in favor of the products, whereas a low Kp value suggests that the equilibrium is in favor of the reactants.

The relative concentrations of reactants and products at equilibrium are shown  by the equilibrium constant.

We know that;

Kp = pSO3^2/pO2 . pSO2^2

Kp =(0.0166)^2/ 0.002930  (0.002318)^2

Kp = 2.8 * 10^-4/1.6 * 10^-8

Kp = 1.75 * 10^4

The Kp of the reaction is gotten as 1.75 * 10^4.

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Answer:

If you are looking for the answer, for the question.

Earthquakes trigger tsunamis when the seismic activity causes the land along fault lines to move up or down

Answer:

A metal M readily forms water-soluble sulphate MSO4, water-insoluble hydroxide M(OH)2 and oxide MO. The oxide and hydroxide are soluble in NaOH. The M is:

Answer:

Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia. ... If that velocity is zero, then the object remains at rest.

Explanation:

Answer:

Before Galileo and Newton, many people thought that objects lost speed because they had a built-in natural tendency to do so. But those people weren't taking into account the multiple forces here on Earth - for example, friction, gravity, and air resistance - that cause objects to change their speed. If we could see the motion of an object in deep interstellar space, we would be able to observe the natural tendencies of an object that is free from any external influence. In deep interstellar space we would observe that if an object had a speed, it would continue to move with that speed until there was some force causing a change in its motion. Likewise, if an object were at rest in interstellar space, it would remain at rest until there was a force causing a change in its motion.

Explanation:

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Look for the ones with the same number of protons and different neutrons number

Answer:

2AgNO, K Cro-> 2KNO; 1Cro,