2. How many grams would be in a 2.75 mole sample of carbon (C)?
a. 0.2299
b. 4.379
c. 33.0 g
d. 1.66x10279

The surface temperature of a block of solid carbon dioxide (dry ice) is -78.5 degrees Celsius (-109.8 degrees F). Once it reaches this temperature, carbon dioxide completely bypasses the liquid state and transforms into a gas. One pound of dry ice produces 250 liters of carbon dioxide gas!

Carbon dioxide in the form of dry ice is employed. Sublimation is the process by which CO2 transforms from a solid to a gas without first undergoing a liquid phase, and it takes place at pressures lower than 5.13 atm and temperatures higher than 56.4 °C (216.8 K; 69.5 °F) (the triple point).

When a substance changes immediately from a solid to a gas without melting beforehand. The carbon dioxide is still present; it simply passes.

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Answer:

Sublimation

Explanation:

C

Answer:

the answer is b and c.

Explanation:

got it right on edge 2021

An example of a fission reaction is as follows:

²³⁹Pu₉₄ + n¹₀⇒¹⁴⁴Ce₅₈ + ⁹⁴Kr₃₆ + ¹n₀

²⁴¹Am₉₅ + ¹n₀ ⇒ ¹⁴⁴La₅₇ + ⁹⁵Sr₃₈ + ¹n₀

A fission reaction is a type of nuclear reaction in which the nucleus of an atom is split into two or more smaller nuclei, along with the release of a large amount of energy and several neutrons. This process occurs when the nucleus of an atom absorbs a neutron and becomes unstable, causing it to split apart.

Fission reactions can occur naturally, as in the decay of certain radioactive isotopes, or can be induced by bombarding a nucleus with high-energy particles.

Fission is also the process used in nuclear power plants to generate electricity, where the heat produced by the fission reaction is used to produce steam that drives turbines.

Thus, options B and C are correct.

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0.5 moles of carbon weigh 6.0055 grams.

One of the chemical elements is carbon. The letter C stands for carbon, and the letter g stands for grams. As a result, 0.5 moles of carbon per gram is equivalent to 0.5 moles of carbon per gram, 0.5 moles of carbon per gram, and 0.5 moles of C per gram.

Carbon has a 12.011 atomic mass. Thus, one mole of carbon has a mass of 12.011 grams (12.011 g/mol). We multiply 0.5 moles of carbon by 12.011 to get grams, and vice versa.

no. of Grams = Moles of Carbon x 12.011

                     =0.5 × 12.011 = 6.0055

0.5 moles of carbon equal 6.0055 grams.

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The complete question is

How many grams is 0.5 moles of carbon

Answer:

Answers are in the explanation

Explanation:

Based on the reaction:

CF₄ + 2Br₂ → CBr₄ + 2F₂

The mole ratio of CF₄ is:

CF₄:Br₂ = 1:2

CF₄:CBr₄ = 1:1

CF₄:F₂ = 1:2

Moles F2:

Molar mass CF₄: 88.0g/mol

57.0g * (1mol / 88.0g) = 0.6477 moles CF₄ * (2mol F₂ / 1mol CBr₄) =

Mass Br2:

Molar mass CBr₄: 331.63g/mol

250.0g * (1mol / 331.63g) = 0.7539 moles CBr₄ * (2mol Br₂ / 1mol CF₄) =

1.51 moles Br₂ * (159.808g / mol) =

Moles F2:

4.8 moles CF₄ * (2mol F₂ / 1mol CF₄) =

The 1H NMR signals of the indicated protons would be split into three peaks.

What are Protons?

Protons are subatomic particles that are present in the nucleus of an atom. They have a positive electric charge and are one of the three main components of an atom, along with electrons and neutrons. Protons are the heaviest of the three particles and make up a large portion of an atom's mass. The number of protons in an atom is known as its atomic number and is what determines an element's chemical behavior and properties.

The split happens because each proton is coupled to two other protons, and each proton is affected by the other two, resulting in a triplet.

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Yes, calcium oxide (CaO) reacts with carbon monoxide (CO) to form calcium carbonate (CaCO3) and oxygen gas (O2). The reaction can be represented by the following equation:

CaO + CO -> CaCO3 + O2

This reaction is an example of a chemical change, as it results in the formation of a new substance with different chemical properties. The reaction is also exothermic, meaning that it releases heat.

Calcium oxide is a white solid that is used in a variety of applications, including cement production and the purification of flue gases. Carbon monoxide is a colorless, odorless gas that is toxic to humans when inhaled. It is produced as a byproduct of the incomplete combustion of fossil fuels.

Hope This Helps You!

Answer:

I believe the answer is "increasing"

Answer:

the shielding of electrons.

Explanation:

KI - Ionic compound,  KCl - Ionic compound,

C₆H₁₂O₆ - Covalent compound, KNO₃ - Ionic compound,

C₆H₄Cl₂ - Covalent compound, C₆H₅COOH - Covalent compound

CH₃COOH - Covalent compound, Parafin wax - Covalent

HCl - Covalent compound

Ionic compounds can be classified as compounds formed between cation ions and an anion. A cation can be described as an electropositive ion and has the tendency to donate valence electrons. Similarly, anions are electronegative ions and have a tendency to accept electrons.

In an ionic compound, an ionic bond contains the complete transfer of electrons, therefore, there exists an electrostatic force of attraction that forms a strong bond.

In a covalent compound, the covalent bond exhibits the mutual sharing of electrons. Shared pairs of electrons are hard to give away as nuclei of two chemical elements together share the electrons and produce a bond stronger.

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The dialysis tube was placed in a solution with a higher concentration of solutes than the 97% water solution inside the tube.

Solution is a way of resolving a problem or addressing an issue. It often involves identifying the underlying cause of the issue and then coming up with a plan that can be implemented to address the problem. Solutions may involve simple steps, such as changing a behavior, or they may involve more complicated processes that require multiple steps, such as creating new policies or procedures. Solutions should be designed to be effective, sustainable, and measurable.

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The inland area has a Continental climate.

Inland climates are typically more severe. Summers might be quite hot, and winters could be very frigid. Rainfall can be scarce.

In inland area the water bodies take long time to heat up and cool down, so they absorb all the heat during the spring and summer when the sun is at its greatest before slowly losing it throughout the fall and winter when the temperature starts to drop.

On the other hand, it warms up and cools down far more quickly on land, that's why the  inland are more cooler.

Inland absorbs and releases heat energy more quickly than water, inland places typically experience higher temperature variations from day to night and from season to season, so that inland is hotter area also.

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Answer:

yes

Explanation:

The molecular formula for a compound can be the same as or a multiple of the compound's empirical formula. Molecular formulas are compact and easy to communicate; however, they lack the information about bonding and atomic arrangement that is provided in a structural formula.

The nuclear product of radioactive decay is called the daughter nuclide.

True

Radioactivity is a phenomenon in which particles such as alpha, beta and gamma rays are emitted from unstable atomic nuclei. This is due to the fact that the nucleus is unstable and requires a rearrangement of its protons and neutrons. Radioactive isotopes can be found in nature, or they can be artificially created. Radioactivity has many useful applications, such as medical imaging, cancer treatments, smoke detectors, and nuclear energy. It also has some potential dangers, such as radiation exposure and the risk of nuclear disasters.

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I do not know, i just need points :/

To determine the rate law for the reaction A + B -> products, we need to examine how the rate of the reaction changes as the concentrations of A and B change. From the given data, we can see that when the concentration of A is doubled, the rate of the reaction also doubles. Similarly, when the concentration of B is doubled, the rate of the reaction also doubles. This indicates that the rate of the reaction is directly proportional to the concentrations of both A and B.

Based on this information, the rate law for the reaction can be expressed as Rate = k[A]*[B], where k is the rate constant. The exponents x and y in the rate law represent the order of the reaction with respect to A and B, respectively. Since the rate of the reaction is directly proportional to the concentrations of both A and B, the exponents x and y would both be equal to 1.

Therefore, the values of x and y are C) x = 1 and y = 1.

Moving down the concentration gradient means that materials move from an area of high concentration of the material to an area of low concentration of the material.

In chemistry, concentration is the amount of a substance in a given space. Another way to describe concentration is the proportion of the solute to a solvent or entire solution. In general, mass/unit volume is used to express concentration. Instead of using volume, concentration can be stated as a mass per unit. Although concentration is typically used to describe chemical solutions, it may be computed for any mixture.

This can be seen in osmosis, where water moves from a higher concentration of solute to a lower concentration of solute.

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Answer:

If this is for the "functional groups" question:

1. aldehyde

2. ketone

3. ester

4. carboxylic acid

Explanation:

Got them all right on edge.

The drop-down menus to identify the names of the structures in the table to the right

1. Aldehyde

2. Ketone

3. Ester

4. Carboxylic acid

A functional group in organic chemistry is a pool of atoms within molecules which bind jointly to react in predicted ways.

Examples of functional groups contain the group hydroxyl, ketone, amine, and ether.

Thus, these are the drop down menus.

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Answer:

The molarity of the solution is 0.29 [tex]\frac{moles}{liter}[/tex]

Explanation:

Molarity, or molar concentration, is a measure of the concentration of a solute in a solution, be it some molecular, ionic or atomic species. It is defined as the number of moles of solute that are dissolved in a given volume.

Molarity is calculated as the quotient between the number of moles of solutes and the volume of the solution:

[tex]Molarity=\frac{number of moles of solute}{volume}[/tex]

Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].

In this case:

Replacing:

[tex]Molarity=\frac{2.1 moles}{7.3 liters}[/tex]

Molarity= 0.29 [tex]\frac{moles}{liter}[/tex]

The molarity of the solution is 0.29 [tex]\frac{moles}{liter}[/tex]

Answer:

M = 0.29 M

Explanation:

We are given;

Number of moles of NaCl; n = 2.1 moles

Total volume of solution; V = 7.3 L

Formula for molarity is;

M = n/L

Thus;

M = 2.1/7.3

M = 0.2878 M

Approximating to 2 decimal places gives;

M = 0.29 M

The balanced chemical reaction is :

[tex]O_2 + 4Na \ -> \ 2Na_2O[/tex]

Number of moles of Na, [tex]n = \dfrac{14.6}{23} = 0.635 \ mol[/tex] .

Now, from balance chemical reaction we can see that 1 mole of oxygen reacts with 4 moles of sodium.

So, number of moles of oxygen are :

[tex]n = \dfrac{0.635}{4}\ mole[/tex]

So, amount of oxygen required is :

[tex]m = \dfrac{0.635 \times 32}{4}\ gm\\\\m = 5.08 \ gm[/tex]

Therefore, 5.08 gram of oxygen will react with 14.6 gram of sodium.

Answer:

Chemical Change

Explanation:

Physical change and phase change are both changes in the matter's state. Such as solid, gas and liquid. Not what it's made of. So when a new substance is formed, it' a chemical change.

KI - Ionic compound, KCl -Ionic compound,

C₆H₁₂O₆ - Covalent compound, C₆H₄Cl₂ - Covalent compound,  

KNO₃ - Ionic compound, C₆H₅COOH - Covalent compound

CH₃COOH - Covalent compound, Paraffin wax - Covalent compound

HCl - Covalent compound

Ionic compounds are formed from the interaction between cation ions and anions. A cation of an atom can be described as an electropositive ion and can donate valence electrons. Similarly, anions of an atom are electronegative ions and can accept electrons.

In an ionic compound, there is a complete transfer of electrons in the formation of an ionic bond, therefore, there exists an electrostatic force of attraction between the ions that forms a strong bond.

In a covalent compound, there is the mutual sharing of electrons in the covalent bonds. The shared electrons are hard to give away as nuclei of two atoms together share the electrons and create a bond stronger.

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There are 5,944 carbon atoms in 2.12 moles of propane, and 15,528 hydrogen atoms in 2.12 moles of propane.

What is carbon?

Carbon is an element that occurs in nature and is essential for life. It is the fourth most abundant element in the universe and is present in all living organisms. Carbon exists in many different forms, including graphite, diamond, amorphous carbon, and fullerenes. Carbon is a key component of organic molecules, which are the building blocks of life. Carbon also plays an important role in the global carbon cycle.

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In the given question,It will take Caroline 1.2 hours  to travel 45 miles if she is traveling 37 mph (miles per hour).

As we know the velocity formula:

v = d/t

Where

V is velocity, d is distance and t is time.

as given in the question

distance = 45 miles

velocity = 37 mph

To find time t,

put the values in the formula:

t = d/v

t = 45/37

t = 1.2 hours

It will take Caroline 1.2 hours  to travel 45 miles if she is traveling 37 mph (miles per hour).

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Photoautotroph has been derived from the combination of three words, photo -meaning "light", autos- meaning "self", and troph meaning "nutrition".

Land plants and photosynthetic algae are both photoautotrophs. These species contain pigments that can capture light, like chlorophyll. Origin of the word: photo- (light) + auto (self) + troph (nourishment). Autotrophs known as photoautotrophs generate complex chemical substances like proteins, lipids, and carbohydrates by absorbing light. Photosynthesis is the name given to this light-mediated process.

An energy-rich carbohydrate like glucose is produced by plants using carbon dioxide, inorganic salts, and water during a process called photosynthesis. As a byproduct, oxygen is also produced, other than glucose. Land plants and photosynthetic algae are both photoautotrophs. These species contain pigments that can capture light, like chlorophyll.

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Answer:

B) by first reversing Reaction 2 and then adding the enthalpy of Reaction 1 and the enthalpy of Reaction 2

Explanation:

C2H2 (g)+2H2 (g)→C2H6 (g)   ΔH=−75 kcal

C2H4 (g)+H2 (g)→C2H6 (g)     ΔH=−33 kcal

C2H2 (g)+H2 (g)→C2H4 (g)     ΔH= ?

First step - Reverse reaction 2.

C2H6 (g)  → C2H4 (g) + H2 (g)    ΔH= 33 kcal

Second step - Add reaction 1 and the reversed reaction 2. This gives us:

C2H2 (g) + 2H2 (g)  +  C2H6 (g) → C2H6 (g) + C2H4 (g) + H2 (g)

Simplifying gives:

C2H2 (g)+H2 (g)→C2H4 (g)

The correct option is:

B) by first reversing Reaction 2 and then adding the enthalpy of Reaction 1 and the enthalpy of Reaction 2

Nitrophenols should be in the following order: para - > ortho - > meta -. There is one additional resonance structure in ortho- and para-nitrophenol.

The stability of the conjugate base dictates the acidity of nitrophenols (or any acid, for that matter). By examining the resonance structures, it is possible to assess the relative stability of m- and p-nitrophenols.Therefore, ortho- and para-nitrophenol are both more acidic than meta-nitrophenol as a result of resonance effects.Sort the following substances in ascending order of acidity: One is ortho-nitrophenol. Paranitrophenol 2. Para-methylphenol 3. 4 Nitrocyclohexanol An intermediary in the creation of paracetamol is 4-nitrophenol. It is then acetylated with acetic anhydride after being reduced to 4-aminophenol.

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The quantity of solar energy available to produce electricity is not affected by location on Earth's surface. This statement is true about solar energy.

Solar energy uses the sun's rays to create heat, light, and electricity. It is a renewable energy source. Heat may be employed in industrial activities like manufacturing whereas light can be immediately transformed into energy..

Solar energy may be converted directly into electrical power. A nonmechanical device called a photovoltaic cell is often constructed of silicon alloys. Photons, or solar energy particles, make up sunlight.

Due to the employment of particular grade silicon and silver during production, solar cells have a high cost of production. Solar cells don't have any moving components, so they may be readily installed in distant locations, but once installed, they don't require any care.

Thus, option D is correct.

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Answer:

Solid.

Explanation:

Hello there!

In this case, according to the given description of the freezing and boiling point of oxygen, it turns out possible for us to figure out the phase of oxygen at 35 K by just subtracting 273:

[tex]35-273=-238\°C[/tex]

In such a way, since this temperature is lower than its freezing point of -219 °C, we infer that such sample will be solid.

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