If I have 54.3 grams of nitrogen held at a pressure of 5 atm and in a container with a volume of 50 liters, what is the temperature (in Celcius) of the gas?

Answer:

hope this helps

Explanation:

72

An ion is an atom or a group of atoms that carries an electric charge.

An atom becomes an ion when it gains or loses one or more electrons, resulting in an unequal number of protons and electrons. This imbalance of positive and negative charges gives the ion a net charge, either positive or negative.

When an atom loses one or more electrons, it becomes a positively charged ion, called a cation. Cations have fewer electrons than protons, resulting in a net positive charge.

When an atom gains one or more electrons, it becomes a negatively charged ion, called an anion. Anions have more electrons than protons, resulting in a net negative charge.

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Answer:A

Explanation:Binary Fission, meaning ‘getting divided into half’ is a type of asexual reproduction where a single living cell grows twice its size and then splits to form two identical daughter cells, each carrying a copy of the parent cell’s genetic material. Examples of cells that use binary fission for division

Answer:

i think its a

Explanation:

Answer:

Fallout is the radioactive particles that fall to earth as a result of a nuclear explosion. It takes around 10 seconds for the fireball from a nuclear explosion to reach its maximum size, but the effects last for decades and span across generations. Five to six years after the bombings, the incidence of leukaemia increased noticeably among survivors. After about a decade, survivors began suffering from thyroid, breast, lung and other cancers at higher than normal rates.

Explanation:

Nuclear fallout is the residual radioactive material propelled into the upper atmosphere following a nuclear blast, so called because it "falls out" of the sky after the explosion and the shock wave has passed. It commonly refers to the radioactive dust and ash created when a nuclear weapon explodes. By the end of 1945, the bombing had killed an estimated 140,000 people in Hiroshima, and a further 74,000 in Nagasaki. In the years that followed, many of the survivors would face leukemia, cancer, or other terrible side effects from the radiation. Pregnant women exposed to the bombings experienced higher rates of miscarriage and deaths among their infants; their children were more likely to have intellectual disabilities, impaired growth and an increased risk of developing cancer. And for all survivors, cancers related to radiation exposure still continue to increase throughout their lifespan, even to this day, seven decades later.

If an equation includes 7(CrO₄)₂, the numbers of Cr's and O's atoms that are there are 14 and 56 respectively.

The number of atoms present in a chemical compound can be calculated by multiplying the subscript of the particular element by any coefficient.

According to this question, 7 moles of chromate with the chemical formula; (CrO₄)₂ is given. The number of oxygen and chromium atoms in this compound can be calculated as follows:

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An example of heterogeneous equilibrium is:

Heterogeneous equilibrium refers to an equilibrium state in a chemical reaction where the reactants and products exist in different physical states or phases. It occurs when substances in different phases, such as solids, liquids, and gases, are involved in a chemical reaction.

Considering the given equations:

The equation I: FeO(s) + CO(g) ⇌ Fe(s) + CO₂(g) represents a heterogeneous equilibrium.

This is because the reactants and products involve different phases (solid and gas). FeO is a solid (s), CO is a gas (g), Fe is a solid (s), and CO₂ is a gas (g). The reaction involves the conversion of a solid and a gas to another solid and a gas, and the equilibrium is established between these different phases.

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Answer:

Neon is the tenth element with a total of 10 electrons. In writing the electron configuration for neon the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for Ne go in the 2s orbital. The remaining six electrons will go in the 2p orbital.

Explanation:

The balanced equation  \(K_{2}Cr_{2}O_{7}\) oxidizes KI in the presence of \(H_{2}SO_{4}\)can be represented as

6 KI + \(K_{2}Cr_{2}O_{7}\) + 7 \(H_{2}SO_{4}\) → 4 \(K_{2}Cr_{2}O_{7}\) + \(Cr_{2}(SO_{4})_{3}\) + 3 \(I_{2}\)\(I_{2}\) + 7 \(H_{2}O\)

The balanced equation for the oxidation of KI (potassium iodide) by \(K_{2}Cr_{2}O_{7}\)(potassium dichromate) in the presence of \(H_{2}SO_{4}\)(sulfuric acid) can be represented as follows:

6 KI + \(K_{2}Cr_{2}O_{7}\) + 7 \(H_{2}SO_{4}\) → 4 \(K_{2}Cr_{2}O_{7}\) + \(Cr_{2}(SO_{4})_{3}\) + 3 \(I_{2}\)\(I_{2}\) + 7 \(H_{2}O\)

In this equation, \(K_{2}Cr_{2}O_{7}\) is the oxidizing agent, and KI is the substance being oxidized. The sulfuric acid (\(H_{2}SO_{4}\)) serves as a catalyst and provides the necessary acidic conditions for the reaction to occur.

The products of the reaction are potassium sulfate (\(K_{2}SO_{4}\)), chromium(III) sulfate (\(Cr_{2}(SO_{4})_{3}\)), iodine (), and water (\(H_{2}O\)).

Note that this equation represents a stoichiometrically balanced equation, ensuring that the number of atoms of each element is the same on both sides of the equation.

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Only reactions B and C would be spontaneous at 298 K.

Spontaneous reactions are reactions that occur naturally and do not require external energy input to proceed. This can be determined by calculating the Gibbs free energy of the reaction at a given temperature and pressure. Gibbs free energy can be calculated using the equation ΔG = ΔH - TΔS, where ΔH is the enthalpy change of the reaction, ΔS is the entropy change of the reaction, T is the temperature in Kelvin, and ΔG is the change in free energy of the reaction.
A spontaneous reaction will have a negative ΔG, meaning that the reaction is exergonic and releases energy. Therefore, the products of the reaction are more stable than the reactants. If ΔG is positive, the reaction is endergonic and requires energy input to proceed.
In order to determine which of the following reactions would be spontaneous at 298 K, we must calculate the ΔG of each reaction and determine if it is positive or negative. The reactions are:
A. 2H2O(l) → 2H2(g) + O2(g) ΔH = 484 kJ/mol, ΔS = 69.9 J/K mol
B. CO2(g) + H2(g) → CO(g) + H2O(g) ΔH = 41 kJ/mol, ΔS = -102.6 J/K mol
C. Fe2O3(s) + 2Al(s) → Al2O3(s) + 2Fe(l) ΔH = -850 kJ/mol, ΔS = -243 J/K mol
To calculate ΔG at 298 K, we will use the equation ΔG = ΔH - TΔS. The temperature in Kelvin is 298 K, or 25°C.
A. ΔG = (484,000 J/mol) - (298 K) x (69.9 J/K mol) = +4165 J/mol (positive, non-spontaneous)
B. ΔG = (41,000 J/mol) - (298 K) x (-102.6 J/K mol) = -2874 J/mol (negative, spontaneous)
C. ΔG = (-850,000 J/mol) - (298 K) x (-243 J/K mol) = -42600 J/mol (negative, spontaneous)

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The half reaction with a more positive standard reduction potential will proceed spontaneously in a redox reaction

The half reaction with a more positive standard reduction potential will undergo reduction when compared to the half reaction with a more negative standard reduction potential.

Oxidation-reduction reactions, often known as redox reactions, are a set of chemical reactions that involve electron transfer between reactants. In a redox reaction, one reactant is oxidized, losing electrons, while the other reactant is reduced, gaining electrons.

The oxidation half-reaction is the process of losing electrons and increasing the oxidation number, whereas the reduction half-reaction is the process of gaining electrons and decreasing the oxidation number. The total reaction is referred to as the redox reaction.

Half-reaction:Half-reaction refers to the two parts of an oxidation-reduction reaction that happen separately. A half-reaction must always be either an oxidation reaction or a reduction reaction. It also describes the movement of electrons and hydrogen ions in an equation.

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a. The rate law for this reaction is: Rate = k[Cl] [H₂]. This means that the rate of the reaction is directly proportional to the concentrations of both Cl and H₂ molecules.

Rate law is an equation that describes the rate of a chemical reaction as a function of the concentrations of reactants. The rate law allows us to describe how the rate of a reaction changes when the concentrations of reactants are changed. It is derived from the rate equation, which is a mathematical expression that can be used to calculate the rate of a reaction from the concentrations of the reactants and the rate constant.

b. The rate law for this reaction is: Rate = k[O] [Os]. This means that the rate of the reaction is directly proportional to the concentrations of both O and Os molecules.
c. The rate law for this reaction is: Rate = k[NO₂]₂. This means that the rate of the reaction is directly proportional to the square of the concentration of NO₂ molecules.

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Complete Question:

A wave is a recurring, periodic disturbance that moves from one place to another via a medium (like water).

A wave is a disturbance that moves or propagates away from its source. Although waves can move energy between locations, they do not always move mass. Common examples of waves are light, sound, and ocean waves.

Mobile phones and radar systems are two noteworthy examples of wave applications. Even though radio waves are usually thought to be safe and contribute to background radiation, it is still advised to keep your distance from radio wave sources.

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complete question;

Using your outline and the materials you’ve gathered, write a 250- to 500-word paper using word processing software. Be sure to proofread and revise your writing to catch any errors in grammar, spelling, logic, or organization. Add a works cited page at the end to give credit to your sources. Submit your completed paper and this activity to your teacher for evaluation. This is for Unit Activity: Waves in edmentum

Answer:

A heating curve graphically represents the phase transitions that a substance undergoes as heat is added to it. The plateaus on the curve mark the phase changes. The temperature remains constant during these phase transitions.

NiCO3(s) + H2SO4(aq) ---> NiSO4(aq) + CO2 (g) + H2O (l). The reaction results in the formation of carbonic acid, H2CO3, which breaks down into water and carbon dioxide gas.

When magnesium carbonate and diluted sulfuric acid H2SO4 are combined, magnesium sulfate, water, and carbon dioxide gas are produced. The following is the balanced chemical equation for the reaction of magnesium carbonate with diluted sulfuric acid: MgSO4 aq + H 2 O + CO 2 g = H 2 SO4 aq.

As a result, sodium carbonate and sulfuric acid react to generate sodium sulfate, which has the chemical formula Na2SO4. Water and carbon dioxide are the other byproducts. So, in the aforementioned reaction, sodium sulfate, water, and carbon dioxide were all produced.

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Answer:H2SO4 or B

Explanation: I TOOK THE TEST  

Answer:

A mixture of ethane and ethene occupies 40 litre at 1.00 atm and at 400 K.The mixture reacts completely with 130 g of O2 to produce CO2 and H2O . Assuming ...

Missing: 32 ‎Br2

If a sample transmits 75% of the incident light, its absorbance would be 0.125 Au.

The absorbance of a sample is calculated from the percentage of incident light transmitted using the following formula:

Absorbance = 2 – log(%T), where %T = percentage of incident light transmitted.

In this case, %T = 75, the formula becomes:

Absorbance = 2 - log 75

                         = 2 - 1.875

                               = 0.125 Au

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Answer:

D

Explanation:

Magnesium is more reactive than zinc so no reaction will take place

1. Examples of solids, liquids, and gases found in a home

Solids: books, furniture, toys

Liquids: water, juice, shampoo

Gases: air, natural gas, propane

2. The human body contains solids, liquids, and gases. Solids include bones, muscles, and organs. Liquids include blood, saliva, and urine. Gases include air in the lungs and dissolved gases in the bloodstream. The body is mostly made up of liquids, as they make up a large percentage of its overall volume.

3. If you needed to remove the water from a sample of blood to study the solids that remained, you could use a process such as evaporation or freeze-drying. Evaporation involves heating the sample to allow the water to evaporate, leaving behind the solids. Freeze-drying involves freezing the sample and then removing the water under vacuum, leaving behind a dry solid.

4. Some metals that could be found within the human body include iron, zinc, and copper. These metals are commonly found in foods such as meat, seafood, nuts, and whole grains. Other metals such as calcium, magnesium, and potassium are also important for the body and are found in a variety of foods.

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Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

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__________ ☆ ☆__________________________________

Answer:

The answer is Electronegativity increases up and to the right

Explanation:

When you move from left to right it increases ( in the periodic table )

But when you move down the table electronegativity decreases.

So “ Electronegativity increases up and to the right” describes the trends the best.

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Good luck!

The gravimetric factor for Br- using silver bromide is 0.425.

The gravimetric factor is an expression that is used to convert grams of a compound into grams of a single element.

It is expressed as a ratio of the formula weight (FW) of the substance that is being determined to that of a second substance that is weighed.

For example formula of silver bromide is AgBr and the formula mass of silver bromide is 188 g/mol

Formula mass of bromide ion = 80 g/mol

Gravimetric factor = 80/1188

Gravimetric factor = 0.425

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Answer:

14

Explanation:

i just know lol

........

CO2 level increases whereas pH of body fluids decreases.

1. Human respiration includes inhalation of oxygen and exhalation of carbon dioxide.

2. When you hold your breath, the amount of carbon dioxide in the body increases as during this process we don't inhale as well as exhale, so the amount of oxygen decreases and the opposite will happens to the level of carbon dioxide thus making the body fluids acidic, as the number of free hydrogen ions increases as body fluids becomes more acidic so the pH of the body fluids decreases because acidity lowers pH value.

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Answer:

20.44 grams of sodium nitrate can be formed

Explanation:

The balanced chemical equation for the reaction between lead (II) nitrate and sodium iodide is:

Pb(NO3)2 + 2NaI → 2NaNO3 + PbI2

Answer:

Explanation:

The reaction is 2H2 + O2 -> 2 H2O

So the molar ratio of H2 and O2 is 2:1

No. of moles of H2 = 12.5/2 = 6.25

No. of moles of O2 = 5.14/32 =0.16

As 6.25 > 0.16*2 = 0.32

there will be H2 leftovers of 6.25-0.32 = 5.93 moles or 11.86 grams

Answer:

Explanation:

2 H2 + 1 O2 => 2 H2O

molecular wt of H2 = 2

molecular wt of O2 = 32

so wt of H2 : wt of O2 = 2x2 : 16 = 4 : 16 = 1 : 4

there are way more H2 as 12.5 > 5.14/4 = 1.285

H2 leftovers = 12.5 - 1.285 = 11.215 gram

Answer:

18.7L

Explanation:

To solve this problem, we first find the number of moles the given number of atoms of He represents.

  Number of atoms of He  = 5.03 x 10²³ atoms

So;

           6.02  x 10²³ atoms will contain 1 mole of He

          5.03 x 10²³ atoms  will have \(\frac{5.03 x 10^{23} }{6.02 x 10^{23} }\)   = 0.84mole of He

Now, the volume at STP;

          1 mole of He will occupy 22.4L at STP

          0.84 mole of He will occupy 0.84 x 22.4  = 18.7L at STP

Active transport requires energy to transport the molecules across the cell membrane. Thus, Option A is correct.

Active transport is the transport of molecules from a lower concentration to a higher concentration across the cell (plasma) membrane. As this process is against the concentration gradient, it requires cellular energy to transport the molecules or ions. Active transport involves Primary active transport and secondary active transport.

Passive transport involves the movement of molecules from a higher to lower concentration gradient and thus does not require energy and is slower than active transport.

Therefore, only active transport requires energy for the transportation of molecules across the cell membrane.

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Answer:

C4H4

Explanation:

92.31% of 52.0 g/mol is 48.0012 g/mol

7.69% of 52.0 g/mol is is 3.9988 g/mol

Carbon has a gram-formula mass of about 12, which goes into 48.0012 about 4 times, so there should be 4 atoms of Carbon

Hydrogen has a gram-formula mass of about 1, which goes into 3.9988 about 4 times, so there should also be 4 atoms of hydrogen

Option (d) is correct. According to the lab safety guidelines, if you accidentally broke a test tube and spilled a chemical on the table you should caution your lab partners to avoid the area while you inform the teacher of the small accident.

We should follow the lab safety guidelines. We should clean the chemical if we totally know about the chemical. Cleaning with water is totally dangerous as you know adding water to concentrated solution cause fire in the lab or extremely exothermic reaction occur.  It is very risky to use water to clean the spill. The things like disposing test tube in special container is a good step. There are some chemical which are very harmful and smell very poisonous. so its very risky throwing the sharp test tube glass pieces into bin without disposal is dangerous.

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