increasing the temperature increasing the temperature does not change shifts equilibrium in the direction of the reactants shifts equilibrium in the direction of the products

The nonzero quantity is Heat Transfer.

Heat Transfer is the only quantity that must be nonzero for a constant pressure process at 300K and 1 atm. This is because Heat Transfer is the amount of energy that is required to maintain constant pressure.

All other quantities in this process, such as Work, Internal Energy, and Enthalpy, are zero for a constant pressure process at a given temperature and pressure.

Therefore, the quantity that is nonzero for this constant pressure process at 300k and 1 atm is Heat Transfer.

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Answer:

0.15215407

Explanation:

Im not 100% sure if this is correct!

Answer:

J. Their momentum is conserved

Explanation:

According to the diagram, the best statement that describes what happens when two astronauts collides in space is that their momentum is conserved.

The momentum before collision is 320kgkm/hr and after collision it is 320kgm/s

 This collision is an inelastic collision;

    momentum before  = momentum after

              m₁v₁ + m₂v₂     =       v(m₁ + m₂)

m₁ = 80kg

v₁  = 4km/hr

m₂ = 80kg

v₂  = 0

v  = 2km/hr

 Insert the parameters;

              (80 x 4) + (80 x 0)    = 2(80 + 80)

                    320                      = 320

The atomic number of an atom is always equal to the total number of protons in the nucleus. Therefore, the correct answer is "protons in the nucleus".

The atomic number of an atom represents the number of protons present in the nucleus of the atom. Protons are positively charged particles, and they determine the element to which the atom belongs. The number of protons in the nucleus is equal to the number of electrons in the neutral atom, which determines the chemical properties of the element. Neutrons are uncharged particles present in the nucleus, and their number may vary for different isotopes of the same element. Therefore, the atomic number cannot be equal to the total number of neutrons in the nucleus or the total number of protons plus electrons in the atom.

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In picture one, there are four electrons, one valance electrons and two shells, in image two there are three electrons, one valance electrons and two shells whereas there are 13 electrons, three valance electrons and three shells.

Electrons:

An electron is a negatively charged particle which can be either bounded with to an atom. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure.

Valence Electrons:

Valence electrons are those electrons which are present in outermost shell or in valence shell or energy level of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell.

Electron Shells Numbers:

Each shell can contain only a fixed number of electrons: the first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on.

So we can conclude that In picture one, there are four electrons, one valance electrons and two shells, in image two there are three electrons, one valance electrons and two shells whereas there are 13 electrons, three valance electrons and three shells.

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Answer:

C

Explanation:

because valence electrons are located at the last energy level

Element Grouping Quick Check:

1. Which element has two valence electrons?

D. calcium

2.Based on its position in the periodic table, which element would have seven valence electrons?

A. Chlorine

3. Which phrase describes a valence electron?

C. An electron in the outer energy level of an atom

4. Which phrase best describes a period on the periodic table?

A. A row of elements

5. Which two elements have the same number of energy levels with electrons in them?

A. Boron and Oxygen

Hope this helps!

Answer:

Oxygen

Explanation:

the difference between DNA and RNA is that DNA is missing one Oxygen atom.

1a. The empirical formula of the compound is Fe₂O₃

1b. The molecular formula of the compound is Fe₂O₃

2a. The molecular formula of the anhydrous salt is MgSO₄

2b. The formula of the crystalline salt is MgSO₄.7H₂O

3i. The number of mole of carbon atoms in the compound is 6 moles

3ii. The number of mole of hydrogen atoms in the compound is 18 moles

3iii. The number of molecules in 3 moles of ethane is 1.806×10²⁴ molecules

Divide by their molar mass

Fe = 69.9 / 56 = 1.248

O = 30 / 16 = 1.875

Divide by the smallest

Fe = 1.248 / 1.248 = 1

O = 1.875 / 1.248 = 3/2

Multiply by 2 to express in whole number

Fe = 1 × 2 = 2

O = 3/2 × 2 = 3

Thus, the empirical formula of the compound is Fe₂O₃

Molecular formula = empirical × n = molar mass

[Fe₂O₃]n = 159.89

[(56×2) + (16×3)]n = 159.89

160n = 159.89

n = 159.89 / 160

n = 1

Molecular formula = [Fe₂O₃]n

Molecular formula = [Fe₂O₃] × 1

Molecular formula = Fe₂O₃

We'll begin by calculating the empirical formula

Divide by their molar mass

Mg = 20.0 / 24 = 0.83

S = 26.66 / 32 = 0.83

O = 53.33 / 16 = 3.33

Divide by the smallest

Mg = 0.83 / 0.83 = 1

S = 0.83 / 0.83 = 1

O = 3.33 / 0.83 = 4

Thus, the empirical formula of the anhydrous salt is MgSO₄

The molecular formula of the anhydrous salt can be obtained as follow:

Molecular formula = empirical × n = molar mass

[MgSO₄]n = 120

[24 + 32 + (16×4)]n = 159.89

120n = 120

n = 120 / 120

n = 1

Molecular formula = [MgSO₄]n

Molecular formula = [MgSO₄] × 1

Molecular formula = MgSO₄

Divide by their molar mass

MgSO₄ = 48.8 / 120 = 0.4

H₂O = 51.2 / 18 = 2.8

Divide by the smallest

MgSO₄ = 0.4 / 0.4 = 1

H₂O = 2.8 / 0.4 = 7

Thus, the formula of the crystalline salt is MgSO₄.7H₂O

1 mole of C₂H₆ contains 2 moles of carbon atoms.

Therefore,

3 moles of C₂H₆ will contain = 3 × 2 = 6 moles of carbon atoms

1 mole of C₂H₆ contains 6 moles of hydrogen atoms.

Therefore,

3 moles of C₂H₆ will contain = 3 × 6 = 18 moles of hydrogen atoms

From Avogadro's hypothesis,

1 mole of ethane = 6.02×10²³ molecules

Therefore,

3 moles of ethane = 3 × 6.02×10²³ molecules

3 moles of ethane = 1.806×10²⁴ molecules

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Complete question

2. A crystalline salt when heated becomes anhydrous and loses 51.2% of its weight the anhydrous salt analysis gave the percent composition as magnesium is equal to 20.0% and sulphur is equal to 26.66% and oxygen is equal to 53.33%. Ccalculate the molecular formula of the anhydrous and the crystalline salt. The molecular weight of the anhydrous salt is 120

Answer:

A comet

Explanation:

Comets  travel so fats through the solar system that they melt which give them their glowy tail

The factor which favoring the filtrate formation at glomerulus is glomerular hydrostatic pressure. Option A is correct.

Glomerular hydrostatic pressure refers to the blood pressure within the glomerular capillaries of the kidney. It is the primary force driving the filtration of blood plasma across the glomerular membrane into the renal tubules. This pressure is higher than the pressure in the Bowman's capsule (capsular hydrostatic pressure) and the osmotic pressure of blood (colloid osmotic pressure), which are opposing forces.

The glomerular hydrostatic pressure is generated by the contraction of the heart, which leads to the pumping of blood into the glomerular capillaries. This pressure forces water and small solutes, such as ions, glucose, and waste products, through the filtration membrane and into the renal tubules. This process is known as glomerular filtration and is the initial step in the formation of urine.

Hence, A. is the correct option.

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The factor favoring filtrate formation at the glomerulus is the glomerular hydrostatic pressure and capsular hydrostatic pressure.

Filtration at the glomerulus is a vital process in the formation of urine. The glomerulus, located in the kidney, acts as a filter to remove waste products, excess water, and other substances from the blood. The factors that favor filtrate formation at the glomerulus are glomerular hydrostatic pressure and capsular hydrostatic pressure.

Glomerular hydrostatic pressure is the blood pressure within the glomerulus. It is created by the force exerted by the heart pumping blood into the glomerular capillaries. This pressure helps to push fluid and solutes out of the blood and into the glomerular capsule, initiating the process of filtration.

Capsular hydrostatic pressure, on the other hand, is the pressure exerted by the fluid already present in the glomerular capsule. This pressure opposes the movement of fluid into the capsule. It is important to note that capsular hydrostatic pressure is relatively low compared to glomerular hydrostatic pressure.

Together, these pressures determine the rate at which filtrate is formed at the glomerulus. If glomerular hydrostatic pressure is high and capsular hydrostatic pressure is low, more fluid and solutes will be filtered out of the blood. Conversely, if glomerular hydrostatic pressure is low and capsular hydrostatic pressure is high, less fluid and solutes will be filtered.

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Answer:

212 degrees

Explanation:

Answer:

212 degrees Fahrenheit

Explanation:

Similarly, if we heat a volume of water above 100 degrees Celsius, or 212 degrees Fahrenheit, water changes its phase into a gas called water vapor. Changes in the phase of matter are physical changes, not chemical changes.

The object with the greatest gravitational pull is the Earth (option D).

Gravitational force is a very long-range, but relatively weak fundamental force of attraction that acts between all particles that have mass. It is believed to be mediated by gravitons.

Newton’s Law of Universal Gravitation states that every particle attracts every other particle in the universe with force directly proportional to the product of the masses and inversely proportional to the square of the distance between them.

The force of gravitational attraction is directly dependent upon the masses of both objects and inversely proportional to the square of the distance that separates their centers.

So as the mass of either object increases, the force of gravitational attraction between them also increases. If the mass of one of the objects is doubled, then the force of gravity between them is doubled. If the mass of one of the objects is tripled, then the force of gravity between them is tripled.

According to this question, Earth has the highest mass among the listed objects, hence, in accordance to the law of universal gravitation, Earth will possess the greatest gravitational pull.

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Answer:

Good morning!!!

Explanation:

Answer:

hi hehe I'm new here hehehe

According to Boyle's law which is a law for constant temperature the  the total equilibrium pressure of the system if the volume of the reaction vessel is reduced to 1.0 l  is 2.4 atmospheres.

Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.

Mathematically, it can be stated as,

P∝1/V or PV=K. The equation states that the product of of pressure and volume is constant for a given mass of gas and the equation holds true as long as temperature is maintained constant.

According to the equation the unknown pressure and volume of any one gas can be determined if two gases are to be considered.That is,

P₁V₁=P₂V₂

Substitution in above equation gives P₂=1.2×2/1=2.4 atmospheres.

Hence, the total equilibrium pressure of the system if the volume of the reaction vessel is reduced to 1.0 l  is 2.4 atmospheres.

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Answer:

Warming the batter and frying the eggs.

Explanation:

This is a chemical change as the products have very different property as compared to reactant not only physically but also chemically. Therefore, the reaction that is associated with cooking is combustion reaction.

Chemical change is a reaction in which breaking and forming of new bonds take place. One molecule completely converted to totally different molecule. The number of atoms remains same

One famous example of chemical change is the rusting of iron. The color, odor and arrangements of atoms in products are very much different from reactant. Chemical change are mostly irreversible in nature.  

Cooking is a chemical change not a physical change. During cooking the reaction that is associated is combustion reaction as the by product is carbon dioxide and water.

Therefore,  the reaction that is associated with cooking is combustion reaction.

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Answer:

G - H2SO4

Explanation:

two hydrogen atoms and 4 oxygen atoms

The amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.

To calculate the molarity of Kool Aid desired, we need to determine the number of moles of Kool Aid powder and sugar in the package. Since the molecular formula for sugar is C12H22O11, we can calculate its molar mass as follows:

Molar mass of C12H22O11 = (12 * 12.01) + (22 * 1.01) + (11 * 16.00)

= 144.12 + 22.22 + 176.00

= 342.34 g/mol

Given that the package contains 4.25 grams of Kool Aid powder, we can calculate the number of moles of Kool Aid powder using its molar mass:

Number of moles of Kool Aid powder = Mass / Molar mass

= 4.25 g / 342.34 g/mol

≈ 0.0124 mol

Similarly, for the sugar, which has a molar mass of 342.34 g/mol, we can calculate the number of moles of sugar using its mass:

Number of moles of sugar = Mass / Molar mass

= 192.00 g / 342.34 g/mol

≈ 0.5612 mol

Now, to calculate the molarity of the desired Kool Aid solution, we need to determine the volume of water. Given that 1.06 quarts is equal to 1 liter, and we have 2.00 quarts of water, we can convert it to liters as follows:

Volume of water = 2.00 quarts * (1.06 liters / 1 quart)

= 2.12 liters

To find the molarity, we use the formula:

Molarity (M) = Number of moles / Volume (in liters)

Molarity of Kool Aid desired = (0.0124 mol + 0.5612 mol) / 2.12 L

≈ 0.286 M

To prepare 65 mL of the desired molarity, we can use dilution calculations. We need to determine the volume of concentrated solution and the volume of water needed.

Let's assume the concentration of the concentrated Kool Aid solution is C M. Using the dilution formula:

(C1)(V1) = (C2)(V2)where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

Given that C1 = C M and V1 = V mL, and we want to prepare a final volume of 65 mL (V2 = 65 mL) with a final concentration of 0.286 M (C2 = 0.286 M), we can rearrange the formula to solve for the volume of the concentrated solution:

(C M)(V mL) = (0.286 M)(65 mL)

V mL = (0.286 M)(65 mL) / C M

So, the amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.

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Answer:

16 years = 5840

Explanation:

multiply the time value by 365

For the sample of n sludge specimens is selected and the conclusion and the pH of each one is determined.

A) The null hypothesis is rejected. Sufficient evidence is present for the fact that the true average pH is less than 7.0.

B) The null hypothesis is rejected. Sufficient evidence is present for the fact that the true average pH is less than 7.0.

C) The null hypothesis is rejected. Sufficient evidence is present for the fact that the true average pH is less than 7.0.

D) The null hypothesis is rejected. Sufficient evidence is present for the fact that the true average pH is less than 7.0.

E) The null hypothesis is rejected. Sufficient evidence is present for the fact that the true average pH is less than 7.0.

The null hypothesis in inferential statistics is that two possibilities are always equal. It shows that the underlying assumption is that the observed difference is just the result of chance. It is possible to estimate the probability of the null hypothesis is correct using statistical tests.

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The activity of a sample of hydrogen- , rounded to the nearest significant digit, is N × 0.00693 Bq and N × 2.56 × 10⁻¹² Ci.

Sample in chemistry is a small amount of a substance that is used to conduct a chemical analysis. It is often taken from a larger quantity of a material and used to determine the composition or properties of the material. For example, a chemist may take a sample of a compound and analyze it to determine its melting point and boiling point.

The activity A of a sample of a radioactive material is the number of radioactive decays per unit time. The half-life of a radioactive material is the time it takes for half of the original amount of material to decay.

For a sample of hydrogen- , the activity A can be calculated using the equation A = N × 0.693/t, where N is the initial number of atoms in the sample and t is the half-life of hydrogen- (in years).

Given that the half-life of hydrogen- is years, the activity A in becquerels (Bq) is:

A = N × 0.693/t = N × 0.693/ = N × 0.00693

The activity A in curies (Ci) can be calculated by multiplying the activity in becquerels by 3.7 × 10⁻¹⁰:

A = N × 0.00693 × 3.7 × 10-10

Therefore, the activity of a sample of hydrogen- , rounded to the nearest significant digit, is N × 0.00693 Bq and N × 2.56 × 10-12 Ci.

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Answer:

He could separate the mixture through filtration and fractional crystallization. Ethanol can also be added in order to remove salt.

Any physical matter that is obtained or made from plants, animals, or the ground without undergoing a chemical process is called a natural material. This is a true statement.

Natural materials are the physical matters that are made from plants, animals and ground(environment) which has not been subjected to any chemical processes for modification.

But any natural material that has undergone any chemical process which has been designed and manufactured to fulfil a particular purpose is called a synthetic material.

Therefore, any physical matter that is obtained or made from plants, animals, or the ground without undergoing a chemical process is called a natural material.

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The pOH of the solution is 0.63. the concentration of hydroxide ions in moles per liter.

To find the pOH in a 0.235 M NaOH solution, we need to use the equation :pOH = -log[OH-]where [OH-] represents the concentration of hydroxide ions in moles per liter (M).Step-by-step solution:To start, we need to determine the concentration of hydroxide ions [OH-] in the solution. The chemical formula for sodium hydroxide is NaOH. When dissolved in water, it dissociates into Na+ ions and OH- ions, as shown below: NaOH → Na+ + OH-This means that the concentration of hydroxide ions in the solution is the same as the concentration of sodium hydroxide, which is 0.235 M.So, [OH-] = 0.235 MNow we can use this value to calculate the pOH:pOH = -log[OH-]pOH = -log(0.235)pOH = 0.628. When rounded to two decimal places, the pOH of the solution is 0.63.So, the correct answer is option b) 0.63. We can write a 150 word answer as follows: A pH scale measures the concentration of hydrogen ions (H+) in a solution. The pOH is a measure of the concentration of hydroxide ions (OH-) in a solution. To calculate the pOH of a 0.235 M NaOH solution, we first need to determine the concentration of hydroxide ions. When sodium hydroxide (NaOH) is dissolved in water, it dissociates into Na+ ions and OH- ions. This means that the concentration of hydroxide ions in the solution is the same as the concentration of sodium hydroxide, which is 0.235 M. Using the formula pOH = -log[OH-], we can find that the pOH of the solution is 0.63. This means that the concentration of hydroxide ions in the solution is 10^-0.63 M, or approximately 0.199 M.

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The empirical formula of lindane, a powerful insecticide, is \(C_{6} H_{6} Cl_{6}\).

Lindane is a member of a group of compounds whose empirical formula is \(C_{n} H_{m} Cl_{p}\) . In the case of lindane, it has six carbon atoms (C6), six hydrogen atoms (H6), and six chlorine atoms (Cl6). The empirical formula represents the simplest ratio of elements present in a compound, and in this case, it shows that lindane consists of six carbon atoms, six hydrogen atoms, and six chlorine atoms.

Lindane, also known as gamma-hexachlorocyclohexane (γ-HCH), is a chlorinated hydrocarbon that has been widely used as an insecticide due to its effectiveness against a variety of pests. The compound belongs to the group of chlorinated compounds that share the same empirical formula of \(C_{n} H_{m} Cl_{p}\) .

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Chemicals are not supposed to be poured down the drain.

Chemicals should not be poured down the drain. This can cause harm to the plumbing system, sewage treatment plants, and the environment. Dispose of household chemicals properly by taking them to a designated recycling center or household hazardous waste collection event.

Thus the action that have been undertaken by Thomas and Trenton  is quite wrong since the chemicals that they have poured down the drain could lead to an environmental hazard.

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#O_2

\(\\ \sf\longmapsto No\:of\;moles=\dfrac{Given\:mass}{Molar\:mass}\)

\(\\ \sf\longmapsto No\:of\:moles=\dfrac{31.99}{32}\)

\(\\ \sf\longmapsto No\:of\:moles\approx 1\)

#NaCl

\(\\ \sf\longmapsto No\:of\:moles=\dfrac{176.8}{58.5}\)

\(\\ \sf\longmapsto No\;of\:moles=3mol\)