Would conditions of +ΔH and -ΔS favor a spontaneous or non-spontaneous reaction? Why?

Answer:

The amount of CO₂ produced can be calculated using the mole ratio of CO₂ to C₂H6:

2 mol CO₂ / 1 mol C₂H6 = x mol CO₂ / 1.01 mol C₂H6

x = 2 mol CO₂ / 1 mol C₂H6 × 1.01 mol C₂H6 = 2.02 mol CO₂

Therefore, 2.02 moles of CO₂ were produced.

Answer:

When a star bigger than our sun, Collapse a black hole may" formed. Most of the time when a star collapse it explodes and this explosion is called "Super Nova".

Explanation:

i hope this helps you

Answer:

The worldly answer is 42

Explanation:

there you go

Answer:

Hydrogen and oxygen

Explanation:

Hydrogen

2 × atomic number = 2

atomic mass = 1.008 amu

Oxygen

2 × atomic number = 16

atomic mass = 15.999 amu

Answer:

The answers to your questions are given below

Explanation:

F. Determination of the missing part of the equation.

_ I₂ + _Na₂S₂O₃ —> _ NaI + _ Na₂S₄O₆

The above equation can be balance as illustrated below:

I₂ + Na₂S₂O₃ —> NaI + Na₂S₄O₆

There are 2 atoms of I on the left side and 1 on the right side. It can be balance by writing 2 before NaI as shown below:

I₂ + Na₂S₂O₃ —> 2NaI + Na₂S₄O₆

There are 2 atoms of Na on the left side and a total of 4 atoms on the right side. It can be balance by writing 2 before Na₂S₂O₃ as shown below:

I₂ + 2Na₂S₂O₃ —> 2NaI + Na₂S₄O₆

Now the equation is balanced.

The coefficients are: 1, 2, 2, 1

Elements >>> Reactant >>> Product

Sodium >>>>> 4 >>>>>>>>> 4

Sulphur >>>>> 4 >>>>>>>>> 4

Oxygen >>>>> 6 >>>>>>>>> 6

Iodine >>>>>> 2 >>>>>>>>>> 2

G. Determination of the missing part of the equation.

__ Mg + __P₄ —> __Mg₃P₂

The above equation can be balance as illustrated below:

Mg + P₄ —> Mg₃P₂

There are 2 atoms of P on the right side and 4 atoms on the left side. It can be balance by writing 2 before Mg₃P₂ as shown below:

Mg + P₄ —> 2Mg₃P₂

There are 6 atoms of Mg on the right side and 1 atom on the left side. It can be balance by writing 6 before Mg as shown below:

6Mg + P₄ —> 2Mg₃P₂

Now the equation is balanced.

The coefficients are: 6, 1, 2

Elements >>>> Reactant >>> Product

Magnesium >> 6 >>>>>>>>> 6

Phosphorus >> 4 >>>>>>>>> 4

Answer:

respiration and photosynthesis

Explanation:

The percentages of carbon dioxide and oxygen in Earth's atmosphere are maintained most directly by cellular respiration and photosynthesis.

Photosynthesis simply refers to a biological and chemical process through which green plants convert light energy derived from the Sun into chemical energy, so as to make their food while using carbon dioxide (CO₂) and releasing oxygen.

On the other hand, cellular respiration is a series of metabolic reactions that occur in living cells and it involves the use of oxygen that are typically produced by green plants (autotrophs) during photosynthesis.

This ultimately implies that, the percentages of carbon dioxide (1%) and oxygen (20%) that are contained in Earth's atmosphere are maintained most directly by cellular respiration and photosynthesis.

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Answer:

A

Explanation:

solution contains 3.5 moles CaCl2/L solution . We need to convert moles CaCl2 to grams.

Hope this helps :)

Answer:

This evidence includes fossilized bones, teeth, eggs, footprints, teeth marks, and even dung. When paleontologists compare a skeleton of a living bird to the fossilized skeleton of a non-bird theropod, like Sinornithosaurus, they see many similarities.

Explanation:

Answer:

When people think of dinosaurs, two types generally come to mind. There were the huge herbivores,

like Apatosaurus, with their small heads and long tails. There were also those fearsome carnivores,

like Tyrannosaurus rex, that walked on two legs and had a mouthful of teeth like kitchen knives.

Living Dinosaurs

These large dinosaurs are no longer around, but dinosaurs still live among us today. They are the

birds. It's difficult to imagine that a bird on your window sill and a T. rex have anything in common.

One weighs less than a pound. The other was the size of a school bus, tipping the scales at eight

tons. But for all their differences, the two are more similar than you might think. In fact, birds and T.

rex are close relatives. They all belong to a group of dinosaurs called theropods.

This is a cladogram, a "" showing the relationships among organisms. The group called dinosaurs includes the extinct dinosaurs

and all their living descendants. All its members, including living birds, descended from the very first dinosaur-their common ancestor.

That's why birds are a kind of dinosaur (just as humans are a kind of primate).

Skeletal Evidence

When paleontologists compare a skeleton of a living bird to the

fossilized skeleton of a non-bird theropod, like Sinornithosaurus,

they see many similarities. They both have a hole in the hipbone, a

feature that distinguishes most dinosaurs from all other animals.

This feature allows an animal to stand erect, with its legs directly

beneath its body. All theropod dinosaurs, including birds, have a

furcula, also known as a wishbone. Another shared characteristic is the presence of hollow bones.

Hollow bones reduce the weight carried by an animal. This feature enables the animal to run faster. It

probably also played a role in the evolution of flight.

thought to have evolved for flight. The discovery of more and more non-flying dinosaurs with feathers

disproved that explanation. For these dinosaurs, feathers may have served other functions, like

gliding, insulation, protection, and display. Feathers play that same role in many bird species today.

Based on the evidence of shared characteristics, scientists have concluded that birds are a type of

Birds are the only dinosaurs with the ability to fly. This is

very interesting to scientists who want to know when the

capability of flight emerged. To find out, some scientists

study the brains of bird and non-bird dinosaurs. Soft

tissue, such as brains, is almost never preserved in the

fossil record. What is preserved is the imprint the brain

left on the inside of the skull. Now scientists are using

computed tomography (CT) scanners to create

endocasts. These are detailed, three-dimensional

reconstructions of the interiors of fossilized skulls.

In a recent study, researchers were able to peer inside

the braincases of more than two dozen specimens.

"Technology allows us to look inside these specimens

without destroying them," says Dr. Amy Balanoff, a

Museum research associate. "It's a non-destructive way

to basically slice up a dinosaur brain. We look inside and see what it can tell us about the evolution of

the brain within dinosaurs. Most of us grew up thinking that dinosaurs had tiny brains, but actually

some had really big brains."

The endocasts allow Balanoff and other researchers to

explore the outer shape of the brain in more detail. In

addition, the casts also provide new information about

the volume and shape of different regions of the brain.

For example, scientists looked at a detailed view of the

dinosaur cerebrum, a region of the brain related to

cognition and coordination. They found that this region

was very large in non-bird dinosaurs closely related to

birds. Dr. Balanoff's research suggests that these

dinosaurs developed big brains long before flight and that

these bigger brains prepared the way for them to fly.

When examining skeletal, behavioral, and brain

evidence, scientists see that birds and non-bird dinosaurs

share many features. This helped them conclude that

dinosaurs aren't extinct after all. They're living among us today.

(Im a really fast Typer and Thinker)

Have a nice day

Answer:

To find the number of atoms in 1.525 moles of potassium, you can use the formula:

Number of atoms = Number of moles * Avogadro's number

Avogadro's number is a constant that is equal to 6.022 x 10^23 atoms/mole. Plugging in the values for the number of moles and Avogadro's number, you get:

Number of atoms = 1.525 moles * (6.022 x 10^23 atoms/mole)

= 9.149 x 10^23 atoms

Therefore, there are approximately 9.149 x 10^23 atoms of potassium in 1.525 moles of potassium.

According to Avogadro's number there are 9.18×10²³ atoms of potassium  which  make up 1.525 moles of potassium.

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number

In the given question number of atoms =number of moles×Avogadro's number=1.525×6.023×10²³=9.18×10²³ atoms .

Thus ,there are 9.18×10²³ atoms of potassium  which  make up 1.525 moles of potassium.

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Answer:

Adaptation.

Explanation:

The survival characteristic adopted by Arctic foxes during different seasons is called adaptation.

The term adaptation is used to define any behavioral or physical characteristics adopted by animals to help them survive their environment. The survival characteristics in the animal can be categorized into three domains: body parts, body coverings, and behaviors. In Arctic foxes, we see body coverings survival characteristics.

Therefore, option A is correct.

Answer:

Water, H20 is a molecule made of oxygen and hydrogen. The bonds that hold water molecules together are due to shared electrons and known as Covalent bonds. In contrast, the bonds that hold NaCl molecule together are Ionic bonds, arising from charge difference between the atoms

Answer:

GHG emissions are often measured in carbon dioxide (CO2) equivalent. To convert emissions of a gas into CO2 equivalent, its emissions are multiplied by the gas's Global Warming Potential (GWP).

The alpha decay of Americium-245 produces an alpha particle and transforms the parent nucleus into a daughter nucleus, in this case, neptunium-241.

The balanced nuclear equation for the alpha decay of 245/95Am (Americium-245) can be represented as follows:

245/95Am → 4/2He + 241/93Np

In this equation, Americium-245 undergoes alpha decay, where an alpha particle (helium-4) is emitted from the nucleus. The resulting nucleus is neptunium-241.

The alpha particle (4/2He) consists of two protons and two neutrons, and its emission from the Americium-245 nucleus reduces its atomic and mass numbers by 2.

The resulting nucleus, neptunium-241 (241/93Np), has an atomic number of 93 (Z = 93) and a mass number of 241 (A = 241). Neptunium-241 is a radioactive isotope that can undergo further decay processes.

Overall, the alpha decay of Americium-245 produces an alpha particle and transforms the parent nucleus into a daughter nucleus, in this case, neptunium-241. This type of radioactive decay is characterized by the emission of an alpha particle, which consists of two protons and two neutrons.

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Answer:

The product would always be 10.

The balanced reaction equation of the reaction is; 2H2O + O2 → 2H2O2

This is a chemical equation that represents the reaction between water (H2O) and oxygen (O2) to form hydrogen peroxide (H2O2). The coefficients in front of each substance indicate the relative number of molecules involved in the reaction.

Recall that we can balance the reaction equation  by ensuring that the atoms of the elements on both sides of the reaction equation are the same as we have above.

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Answer:  1,950 N

Explanation:

2812.5N of force is needed to accelerate a 1,875 kg object at a rate of 1.5 m/s².

HOW TO CALCULATE FORCE:

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Answer: The osmotic pressure of 5.0g of sucrose solution in 1 L is 271.32 torr.

Explanation:

Given: Mass = 5.0 g

Volume = 1 L

Molar mass of sucrose = 342.3 g/mol

Moles are the mass of a substance divided by its molar mass. So, moles of sucrose are calculated as follows.

\(Moles = \frac{mass}{molarmass}\\= \frac{5.0 g}{342.3 g/mol}\\= 0.0146 mol\)

Hence, concentration of sucrose is calculated as follows.

\(Concentration = \frac{moles}{Volume (in L)}\\= \frac{0.0146 mol}{1 L}\\= 0.0146 M\)

Formula used to calculate osmotic pressure is as follows.

\(\pi = CRT\)

where,

\(\pi\) = osmotic pressure

C = concentration

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula as follows.

\(\pi = CRT\\= 0.0146 \times 0.0821 L atm/mol K \times 298 K\\= 0.357 atm (1 atm = 760 torr)\\= 271.32 torr\)

Thus, we can conclude that the osmotic pressure of 5.0g of sucrose solution in 1 L is 271.32 torr.

We have that you can you prepare 450 ml of 1 X buffer A by adding 45ml of 10X buffer A with 405ml(450-45) of water

From the question we are told

If you have 100 ml of 10X Buffer A, how could you prepare 450 ml of 1 X buffer A

Generally the equation for the  Concentration  Volume relationship is mathematically given as

\(C1V1=C2V2\\\\Where\\\\C1=10X\\\\C2=1X buffer A\\\\V2=450ml \\\\Therefore\\\\V1=\frac{450*1}{10}\\\\V1=45ml\)

Therefore

You can you prepare 450 ml of 1 X buffer A by adding 45ml of 10X buffer A with 405ml(450-45) of water

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There is no reason to run these solutes at the 20 MWCO because they are both much smaller than the MWCO of the membrane.

The MWCO (molecular weight cut off) is the molecular weight of a solute at which it will be retained by a membrane during a process such as ultrafiltration or dialysis. If a solute has a molecular weight higher than the MWCO of a membrane, it will be retained and not pass through the membrane. If the molecular weight of a solute is lower than the MWCO, it will pass through the membrane.

In this case, glucose has a molecular weight of 180 g/mol (6 carbons x 12 g/mol per carbon + 6 oxygens x 16 g/mol per oxygen) and albumin has a molecular weight of approximately 81,942 g/mol (607 amino acids x 135 g/mol per amino acid). Both of these solutes have molecular weights that are much lower than 20,000 g/mol, which is a typical MWCO for ultrafiltration or dialysis membranes.

They would both easily pass through the membrane and be lost during the process. Instead, a membrane with a much lower MWCO would be needed if we wanted to retain these solutes during a process such as ultrafiltration or dialysis.

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Answer:

Beryllium

Explanation:

Berylluim has 4 electrons and a 2nd energy level

(Mark brainliest pls if correct)

Answer:

399.80 atm

Explanation:

Since there are 101.3 kPa per every 1 atm, you need to divide the given number by 101.3 to convert the pressure from kPa to atm.

1 atm = 101.3 kPa

 40500. kPa               1 atm
---------------------  x  --------------------  = 399.80 atm
                                 101.3 kPa

Answer:

Explanation:

Answer:

2. 389.15K , 3. 229.15K

Explanation:

K-273.15 = °C

The standard enthalpy change (∆H°rxn) for the given reaction is -38.0 kJ/mol. This negative value indicates that the reaction is exothermic, meaning that it releases heat to the surroundings.

The standard enthalpies of formation (∆Hf°) for the reactants and products involved in the reaction are: ∆Hf°[NO2(g)] = +33.2 kJ/mol. ∆Hf°[H2O(l)] = -285.8 kJ/mol. ∆Hf°[HNO3(aq)] = -207.2 kJ/mol. ∆Hf°[NO(g)] = +90.4 kJ/mol. We can use these values to calculate the standard enthalpy change (∆H°) for the reaction using the following equation:

∆H°rxn = Σn∆Hf°(products) - Σm∆Hf°(reactants) where n and m are the stoichiometric coefficients of the products and reactants, respectively. Substituting the values, we get:∆H°rxn = [2 × ∆Hf°(HNO3(aq))] + [∆Hf°(NO(g))] - [3 × ∆Hf°(NO2(g))] - [1 × ∆Hf°(H2O(l))]. ∆H°rxn = [2 × (-207.2 kJ/mol)] + [90.4 kJ/mol] - [3 × (+33.2 kJ/mol)] - [1 × (-285.8 kJ/mol)]. ∆H°rxn = -414.4 kJ/mol + 90.4 kJ/mol - 99.6 kJ/mol + 285.8 kJ/mol. ∆H°rxn = -38.0 kJ/mol

Therefore, the standard enthalpy change (∆H°rxn) for the given reaction is -38.0 kJ/mol. This negative value indicates that the reaction is exothermic, meaning that it releases heat to the surroundings.

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Answer:

the formula is N₂O

Explanation:

Answer:

The charge that is typical for ions of the alkaline earth metals is +2

Explanation:

Group 1 elements (alkali metals such as Li, Na, K...) all have one valence electron that they donate when forming ionic bonds. This will cause them to have a charge of +1.T he alkaline earth metals (Ca, Mg) have two valence electrons they donate which means their charge when forming ions is +2. The members of the aluminum family lose three electrons giving them a charge of +3.

Answer:

Explanation:

The steps to calculate the Zeff is :

1)  Write  the electronic configuration.

Carbon: 1s2 2s2 2p2

Oxygen: 1s2 2s2 2p4

2) there are two core electrons in each atom and four in carbon and six in oxygen.

1s) (2s2p)

3) as mentioned the shielding of electrons within the same shell is negligible.

4) for electron of s or p orbital  the shielding contribution by the electrons having a principal quantum number less by one would be 0.85 each. And all electrons further left would contribute an amount of 1.0 each.

5) For oxygen:

Zeff = Z - S

S = 2X0.85 = 1.7

Zeff = 8- 1.7 = 6.3

For carbon

Zeff = Z - S

S = 2X0.85 = 1.7

Zeff = 6- 1.7 = 4.3

Answer:

C

Explanation:

Answer:

C.

Explanation:

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