A sample of argon has a volume of 6.0 cm 3 and the pressure is 0.87 atm. If the final temperature is 35 degrees celsius, the final volume is 10 cm 3 and the final pressure is 0.52 atm, what was the initial temperature of the argon

Answer:

False.

Explanation:

Snow forms when tiny ice crystals in clouds stick together to make snowflakes.

Answer:

what he said lol.

Explanation:

Answer:

The right answer is:

Replacing the powdered lead oxide with its large crystals

Removing lead (IV) oxide from the reaction mixture

Using 1.0 gram of lead (IV) oxide

Explanation:

Based on the given information this reaction is the catalytic decomposition of H₂O₂ into water and oxygen  using Lead (IV) oxide as a catalyst.

     2. Also, Removing lead (IV) oxide from the reaction mixture  the reaction rate decreased because as the catalyst is removed.

     3.  Using 50 cm³ of hydrogen peroxide  doesn't affect the rate because the concentration of the reactant doesn't change.

     4. Using 1.0 gram of lead (IV) oxide would decrease the reaction rate because the amount of catalyst decreased

So, The right answer is:

Replacing the powdered lead oxide with its large crystals

Removing lead (IV) oxide from the reaction mixture

Using 1.0 gram of lead (IV) oxide

Answer:

31.7 °C

Explanation:

Charles law states that for volume of a gas is directly proportional to the absolute temperature for a fixed amount of gas at constant pressure

we can use the following equation

V1/T1 = V2/T2

where V1 is volume and T1 is temperature at first instance

V2 is volume and T2 is temperature at second instance

temperature should be in kelvin scale

T1 - 0 °C + 273 = 273 K

substituting the values in the equation

22.4 L / 273 K = 25.0 L / T2

T2 = 304.7 K

temperature in celcius is - 304.7 K - 273 = 31.7 °C

the gas must be 31.7 °C to reach a volume of 25.0 L

Answer:

Deposition

Explanation:

Answer:

Deposition...

Explanation:

Deposition is a process in which the water, ice and wind for layers of sediments when the fluid flow loses it's kinetic energy. After losing energy, the flow of soil in restricted and a layer over layer of soil is formed by deposition called sediments.

To find the empirical formula of a compound with 9.1 g of lithium and 10.4 g of oxygen, we calculate the moles of each element and express their ratio in the simplest whole numbers. The empirical formula is determined to be Li₂O.

To calculate the empirical formula of a compound formed from lithium and oxygen, we need to determine the moles of each element present in the 9.1 grams of lithium and 10.4 grams of oxygen. The molar mass of lithium (Li) is approximately 6.94 g/mol, and the molar mass of oxygen (O) is about 16.00 g/mol.

First, we calculate the moles of lithium:
Moles of Li = mass (g) ÷ molar mass (g/mol) = 9.1 g ÷ 6.94 g/mol = 1.31 moles of Li

Next, we calculate the moles of oxygen:
Moles of O = mass (g) ÷ molar mass (g/mol) = 10.4 g ÷ 16.00 g/mol = 0.65 moles of O

Now we determine the simplest whole number ratio of the elements in the compound:
Li to O ratio = 1.31 moles of Li ÷ 0.65 moles of O = 2:1

Therefore, the empirical formula is Li₂O

Answer:

Explanation:

Givens

P = 1.25 atm

V = 5.4 L

P1 = 3 atm

V1 = ??

Formula

The basic formula is P*V = P1 * V1

Solution

1.25 * 5.4 = 3 * V1

6.75 = 3*V1

6.75 /3 = 3*V1/3

2.25 = V1

Answer:

D.

Explanation:

Nuclear energy does not have greenhouse gas emissions. The emissions produced by nuclear fission plants are similar to renewable energy sources.The generation of power using nuclear energy does not affect air quality thus providing a clean source of energy.Nuclear energy originates from radioactive material which are harmful to living organisms.

Answer:

D. risk from radioactive material; benefit of obtaining low-cost energy

Explanation:

I just took the test. Ap*x

Answer:

5.66 %.

Explanation:

mass percent is the ratio of the mass of the solute to the mass of the solution multiplied by 100.

mass % = (mass of solute/mass of solution) x 100.

mass of potassium nitrite = 30.0 g,

mass of the solution = mass of water + mass of potassium nitrite = 500.0 g + 30.0 g = 530.0 g.

∴ mass % = (mass of solute/mass of solution) x 100 = (30.0 g/530.0 g) x 100 = 5.66 %.

The answer is sharp spines and waxy stems. Hope this helped.

Answer:

1- Option A = Sink

2- Option B = Float

Explanation:

1- If an object’s density is greater than 1.00 g/mL, it will sink in water.

For example, the density of aluminum is 2.7g/cm³. That is why it will sink in water.

2- If an object’s density is less than 1.00 g/mL, it will float in water.

For example, the density of oak is 0.7 g/cm³. That is why oak will float in water.

3-  Given data:

Mass, m = 50 g  

Volume, v = 10 cm3 ( 1ml = 1cm3)

Formula of density :          

Density = mass/ volume

          d = m/v

          d = 50g/10cm3

          d = 5 g/cm3

Answer:

By definition, the first ionization energy of an element is the energy needed to remove the outermost, or highest energy, electron from a neutral atom in the gas phase. The process by which the first ionization energy of hydrogen is measured would be represented by the following equation.

Explanation:

Answer:

16.4 L

Explanation:

we can use the combined gas law equation that gives the relationship among volume, temperature and pressure conditions of gases.

P1V1/T1 = P2V2/T2

STP conditions are standard temperature and pressure conditions

P1 is standard pressure = 1 atm , T1 is standard temperature = 273 K

and V1 is the volume

P2 is pressure, T2 is temperature and V2 is volume at the second instance

temperature is in kelvin scale,

512 ° + 273 = 785 K

substituting the values in the equation

1 atm x 10.0 L / 273 K = 1.75 atm x V / 785 K

V = 16.4 L

new volume is 16.4 L

Answer & Explanation:

Similarities:

Difference:

It’s C. One or more substances with different chemical properties will form.

Answer:

Ozone holes could begin to shrink in size.

Explanation:

The use of CFCs today is one of the anthropogenic causes of ozone depletion. CFCs are found in Air conditioners, refrigerators and are excellent coolants.

When CFCs are released into the atmosphere, they react spontaneously with ozone.

Ozone is made up of 3 oxygen atoms and it serves as a protective covering for the very harmful ultraviolet rays from reaching the earth. Ozone cuts off these radiation and it reflects them back into space.

Chloroflurocarbons release Chlroine atoms when they get broken down by ultraviolet rays. The Cl released produces a series of reactions in the presence of ozone.

Chlorine is very reactive as it is an halogen. It requires just an electron to complete its octet.

Chlorine freely reacts with the ozone producing a range of compounds. Most of the ozone becomes oxygen molecules.

This would deplete the ozone greatly. The increasing use of CFCs leaves holes in the ozone layer. The holes allow for harmful UV rays to reach the earth surface. This can lead to various harm on human lives on the earth surface.

This is why CFCs are not permitted in appliances again.

Answer:their particles are more spread out than others

Explanation:

Answer:

Number 2

Explanation:

Their particles are more spread out than the particles of the other states

Answer:

The correct answer option A.

Explanation:

The reaction rate is determined experimentally for different concentrations of the reactants. These data indicate that by changing the concentration of Nh4 + or NO2-, the reaction rate changes. If the concentration of Nh4 + is doubled, keeping constant at NO2- the reaction rate is doubled, and if the concentration of that same reactant is changed by a factor of 4, it is quadrupled, and so on. If the concentration of NO2- is now modified in the same way as the previous one, it is observed that it also changes the reaction rate in this way. And he overall dependence of the reaction on the concentration will be the same for both reactants.

Therefore the reaction rate is proportional to the concentration of Nh4 + and NO2-.

Answer:

4.8 atm.

Explanation:

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R is the general gas constant,

T is the temperature of the gas in K.

P₁V₁ = P₂V₂

P₁ = 10.0 atm, V₁ = 318.0 L.

P₂ = ??? atm, V₂ = 662.5 L.

∴ P₂ = P₁V₁/V₂ = (10.0 atm)(318.0 L)/(662.5 L) = 4.8 atm.

The answer is:

The new temperature will be equal to 4 K.

[tex]T_{2}=4K[/tex]

We are given the volume, the first temperature and the new volume after the gas is compressed. To calculate the new temperature after the gas was compressed, we need to use Charles's Law.

Charles's Law establishes a relationship between the volume and the temperature at a gas while its pressure is constant.

Now, to calculate the new temperature we need to assume that the pressure is kept constant, otherwise, the problem would not have a solution.

From Charle's Law, we have:

[tex]\frac{V_{1}}{T_{1}}=\frac{V_{2}}{T_{2}}[/tex]

So, we are given the following information:

[tex]V_{1}=500mL\\T_{1}=20K\\V_{2}=100mL[/tex]

Then, isolating the new temperature and substituting the given information, we have:

[tex]\frac{V_{1}}{T_{1}}=\frac{V_{2}}{T_{2}}[/tex]

[tex]T_{2}=\frac{T_{1}}{V_{1}}*V_{2} \\[/tex]

[tex]T_{2}=\frac{20.00K}{500mL}*100mL\\[/tex]

[tex]T_{2}=4K[/tex]

Hence, the new temperature will be equal to 4 K.

[tex]T_{2}=4K[/tex]

Have a nice day!

Answer:

1.52 g NaOH

Explanation:

The molar mass M is a physical property defined as the mass of a given substance (chemical element or chemical compound) divided by the amount of substance.

Molar mass of NaOH is 40.0 g/mol

40.0 g/mol contains 6.022 × 10²³ molecules

∴ 2.30 × 10²² molecules will contain (2.30 × 10²²) * (40.0)/6.022× 10²³

                                                             = 1.52 g NaOH

Answer:c a mutation

Explanation:

Final answer:

In sexual reproduction, a new genetic variation in offspring that did not come from either parent is called a mutation. Mutations are a key source of genetic diversity and contribute to the evolution of new characteristics within a population.  So the correct option is C.

Explanation:

In sexual reproduction, when an offspring exhibits a new genetic variation not found in either parent, this is known as a mutation. Mutations are changes in DNA that serve as the ultimate source of new alleles or new genetic variation within a population. This genetic diversity is essential for the evolution of species, as it allows for adaptations to changing environments and the development of new traits.

Harmless mutations and sexual recombination play a crucial role in the evolution of new characteristics by contributing to genetic diversity. While sexual reproduction can introduce unique combinations of existing genes, it is through mutations that entirely new genetic variations can arise, potentially influencing an organism's phenotype—the observable characteristics of an individual.

In the electrolysis of 1.0 M aqueous HBr, hydrogen gas is formed at the cathode, while bromine gas and hydroxide ions are formed at the anode.

In the electrolysis of 1.0 M aqueous HBr, the following products are formed: hydrogen gas (H2) at the cathode, and bromine gas (Br2) and hydroxide ions (OH-) at the anode.

At the cathode, reduction occurs where two hydrogen ions (H+) gain electrons to form hydrogen gas:

2H+ + 2e- -> H2

At the anode, oxidation occurs where bromide ions (Br-) lose electrons to form bromine gas and hydroxide ions:

2Br- - 2e- -> Br2

2H2O - 4e- -> 4OH- + O2

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Answer:

Explanation:

Material A has a melting point of 34°C

Material B has a melting point of 56°C

Both materials, lets say a metal have been subjected to a temperature of 50°C

After a period of time, both of them would have melted to their liquid state.

The atoms of the solids would vibrates and the bonds would begin to break to form melt.

Material A would be the first to melt as it has a lower melting point. The lower the melting point, the faster and quicker it would reach its melting temperature.

Material B would need to accumulate more heat and its temperature would continue to rise for the phase change to occur. As it reaches the 50°C mark, the bonds are set free and a melt forms.

Answer:

299.14 K or 26°C

Explanation:

The ideal gas law, also called the general gas equation, is the equation of state of a hypothetical ideal gas.

The ideal gas law is often written as

PV = nRT

where P ,V and T are the pressure, volume and absolute temperature;

n is the number of moles of gas and  R is the ideal gas constant.

n=1.10 x 10^5 mol  

V= 2.70 x 10^6 L  

P= 1.00 atm= 101.325 kPa  

R= 8.314 kPa*L/ mol*K

when the formula is  rearranged, T=PV/ nR  

T = (101.325kPa * 2.70 x 10^6 L)/ (1.10 x 10^5 mol * 8.314 kPa*L/ mol*K)  

T = 299.1421917 K

or

T = 299.14 - 273.15 = 25.99 =  26°C

Using the Ideal Gas law, we find the temperature T = ((1.00 atm)*(2.70x10^6 L))/((1.10x10^5 mol)*(0.0821 L.atm/K.mol)). Calculating that gives you the temperature (in Kelvin) of the helium in the balloon.

In that case, you're being asked to find the temperature of helium inside a weather balloon. The Ideal Gas Law (PV=nRT) will be useful here, where P is the pressure (1 atm), V is the volume (2.7x10 to the power of 6 L), n is the number of moles of helium (1.10x10 to the given power of 5 mol), R is the gas constant (0.0821 L.atm/K.mol) and T is the temperature which we need to calculate.

So, the Ideal Gas Law becomes: (1.00 atm)*(2.70x10^6 L) = (1.10x10^5 mol)*(0.0821 L.atm/K.mol)*T

Solving for T by isolating it on one side gives T = ((1.00 atm)*(2.70x10^6 L))/((1.10x10^5 mol)*(0.0821 L.atm/K.mol))

Calculating that should give you the temperature (in Kelvin) of the helium in the balloon.

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Answer:

c. shampoo

Explanation:

Answer:

The word dynamic is used to describe chemical equilibrium because even though the concentration of reactants and products remains constant, the reaction does not stop, but still continues with the rate of forward reaction equal to the rate of backward reaction. This is opposed to static equilibrium where there is no reaction at all.

Hope this helps you out!

The word dynamic is used to describe chemical equilibrium because, despite concentrations of reactants and products being constant, reactions continue in both directions at the same rate, indicating continuous exchange.

Given the fact that the concentrations of reactants and products are not changing, the word dynamic is used to describe chemical equilibrium because, at this state, the forward and reverse reactions are happening at the same rate. Even though there is no net change in the concentrations of reactants and products, reactions continue to occur in both directions. This means that molecules of reactants are constantly being converted into products at the same rate as products are being converted back into reactants, maintaining a constant concentration of both. Therefore, the equilibrium is dynamic because the reactants and products are in a state of continuous, but balanced, exchange.

Answer:

The answer is C. AB is an intermediate; therefore the rate law is determined from the reactants in the previous step.

I just took the test and C. was correct. Please mark me as brainliest!

Answer:  C: AB is an intermediate; therefore the rate law is determined from the reactants in the previous step.

Explanation:  :  Rate law is usually determined from the slowest step of the reaction mechanism.

Thus as we can see that the reaction which is slow has AB as its intermediate, rate law can be determined from the same.

Moreover , we can see that the overall rate law is very different from the rat law determined from the slowest step.

Hydroxide ion concentration is less this statement is true about the relative concentration of hydrogen ions or hydroxide ions in an acidic solution.

Hence, Option (D) is correct answer.

pH is used to measure whether the substance is acidic, basic or neutral and the range is 0 - 14. If the pH is less than 7 then the solution is acidic in nature. If the pH is more than 7 then the solution is basic in nature. If the pH is equal to 7 then the solution is neutral in nature.

Acidic solution means the pH of the solution is less than 7. When the solution has pH less than 7 it shows that the hydrogen ion concentration is higher than the hydroxide ion concentration.

Thus, from the above conclusion we can say that Hydroxide ion concentration is less this statement is true about the relative concentration of hydrogen ions or hydroxide ions in an acidic solution.

Hence, Option (D) is correct answer.

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In an acidic solution, the concentration of hydrogen or hydronium ions is greater, and as a result, the concentration of hydroxide ions is less.

In an acidic solution, the concentration of hydrogen ions (H+) or hydronium ions (H3O+) is greater than the concentration of hydroxide ions (OH-). This is due to the ionization of the acid in water, which adds more hydrogen ions into the solution, leading to a proportionally lower concentration of hydroxide ions. As per Le Châtelier's principle, the reaction equilibrium of water autoionization shifts to the left, which reduces the concentration of hydroxide ions. Therefore, the correct answer is d: Hydroxide-ion concentration is less.

Answer:

1111.5L

Explanation: