Which chemical reaction absorbed energy

Answer:- Frequency is [tex]4.80*10^1^4Hz[/tex] .

Solution:- The wavelength of electromagnetic radiation is given as 625 nm and we are asked to calculate the frequency. Frequency is inversely proportional to the wavelength and the formula used to calculate frequency when wavelength is given is:

[tex]\nu =\frac{c}{\lambda }[/tex]

where, [tex]\nu [/tex] is frequency, c is speed of light and [tex]\lambda [/tex] is the wavelength.

Value of speed of light is [tex]\frac{3.0*10^8m}{s}[/tex] . We need to convert the given wavelength from nm to m.

[tex]1nm=10^-^9m[/tex]

So, [tex]625nm(\frac{10^-^9m}{1nm})[/tex]

= [tex]6.25*10^-^7m[/tex]

Let's plug in the values in the formula and calculate the frequency:

[tex]\nu =\frac{3.0*10^8m.s^-^1}{6.25*10^-^7m}[/tex]

= [tex]4.80*10^1^4s^-^1[/tex] or Hz.

So, the frequency of the electromagnetic wave is [tex]4.80*10^1^4Hz[/tex] .

The frequency of an electromagnetic wave with a wavelength of 625 nm is [tex]\boxed{4.8 \times 10^{14} \text{ Hz}}.[/tex]

To find the frequency of an electromagnetic wave, one can use the relationship between the speed of light (c), the frequency (f), and the wavelength (\lambda), which is given by the equation:

[tex]\[ c = f \lambda \][/tex]

 The speed of light in a vacuum is approximately [tex]\( 3 \times 10^8 \)[/tex]meters per second (m/s). Since the wavelength is given in nanometers (nm), we need to convert it to meters to match the units of the speed of light. There are [tex]\( 10^9 \)[/tex] nanometers in a meter, so a wavelength of 625 nm is:

[tex]\[ \lambda = 625 \text{ nm} \times \frac{1 \text{ m}}{10^9 \text{ nm}} = 625 \times 10^{-9} \text{ m} \][/tex]

Now we can rearrange the equation [tex]\( c = f \lambda \)[/tex] to solve for the frequency (f):

[tex]\[ f = \frac{c}{\lambda} \][/tex]

 Substituting the values for c and \lambda:

 [tex]\[ f = \frac{3 \times 10^8 \text{ m/s}}{625 \times 10^{-9} \text{ m}} \][/tex]

[tex]\[ f = \frac{3}{625} \times 10^{14} \text{ Hz} \][/tex]

[tex]\[ f = 4.8 \times 10^{14} \text{ Hz} \][/tex]

 Therefore, the frequency of the electromagnetic wave is[tex]( 4.8 \times 10^{14} \) hertz.[/tex]

A cubic centimeter (cm³) is a unit used to measure volume. It is the volume of a cube with an edge length of exactly one centimeter.

A cubic centimeter (cm³) is a unit used to measure volume. It is the volume of a cube with an edge length of exactly one centimeter. One cubic centimeter is equivalent to one milliliter (mL) and is 1/1000 of a liter.

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Answer:

Number of protons + neutrons

ANSWER C

Given,  half life of a certain radioactive element = 800 years.

Amount of substance remaining at time t = 12.5%

Lets consider the initial amount of the radioactive substance  = 100%

Using the half life equation:

A = A₀(1/2)^t/t₁/₂

where A₀ is the amount of radioactive substance at time zero and A is the amount of radioactive substance at time t, and t₁/₂ is the half-life of the radioactive substance.

Plugging the given data into the half life equation we have,

12.5 = 100 . (1/2)^t/800

12.5/100 = (1/2)^t/800

0.125 = (0.5)^t/800

(0.5)^3 = (0.5)^t/800

3 = t/800

t = 2400 years

Thus the object is 2400 years  old.

The age of the object can be calculated using the given half-life and the percentage of remaining atoms which is 2888.8 years

The half-life of a radioactive element is the time it takes for half of its radioactive atoms to decay, transforming into a stable form. It's a fundamental concept in nuclear physics and radiometric dating, used to estimate the age of rocks and archaeological artifacts. The half-life of a radioactive element is the time it takes for half of its nuclei to decay. If only 12.5% of the radioactive atoms remain, it means that 87.5% of the atoms have decayed. Using the given half-life of 800 years, we can calculate the age of the object by finding the number of half-lives it would take for 87.5% decay:

Age of half-lives = log2(87.5%) ≈ 3.61

Age of the object = 3.61 x 800 years = 2888.8 years

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It would be Calcium: Ca

We can tell which atom has 20 electrons by looking on the periodic table. If we look at number 20 (the atomic number shows how many electrons and protons an atom has) it is Calcium (symbol Ca).

Copper wire

Metal is one of best conductors for heat

Answer:- work = 319 J

Solution:- The volume of the gas decreases from 5.35 L to 1.55 L.

[tex]\Delta V=1.55L-5.35L[/tex]  = -3.80 L

external pressure is given as 0.829 atm.

[tex]w=-P_e_x_t\Delta V[/tex]

where w is representing work.

Let's plug in the values and calculate pressure-volume work:

[tex]w=-0.829atm(-3.80L)[/tex]

w = 3.15 atm.L

We need to convert atm.L to J.

1 atm.L = 101.325 J

So, [tex]3.15atm.L(\frac{101.325J}{1atm.L})[/tex]

= 319 J

So, 319 J of work is involved in a chemical reaction. Positive work means the work is done on the system.

Final answer:

To find the amount of work involved in a chemical reaction with a volume decrease, we calculate it using the formula for work, leading to a result of approximately 324.7 Joules.

Explanation:

The question asks for the calculation of work involved in a chemical reaction where the volume decreases under constant pressure. First, to find the work done, we can use the formula W = -PΔV, where P is the pressure and ΔV is the change in volume (final volume - initial volume). Given that the pressure remains constant at 0.829 atm and the volume decreases from 5.35 L to 1.55 L, we have ΔV = 1.55 L - 5.35 L = -3.8 L. To convert this work into joules (J), we use the conversion factor where 1 L·atm = 101.3 J. Therefore, the work done is W = -0.829 atm × -3.8 L × 101.3 J/(L·atm) = 324.7226 J, which can be rounded to approximately 324.7 J.

It has a single valence electron.

3pro & 3ele - it is the single electron in shell 2.

Li has 1 valence electron

Answer:

the answer is d

Explanation:

Answer: Option (D) is the correct answer.

Explanation:

When we use an object or substance in excess then it is likely that the substance will run out with time. But at the same time, if we use that substance according to its requirement and try to conserve it as much as we can then we can preserve the substance.

Hence, it is good to avoid wastage of a substance and balance its use according to the need.

Therefore, we can conclude that in the given situation yes, there is a problem with the solution as the need to conserve copper must be balanced with use.

pretty sure its c 95% sure

The correct answer is A. The solution is acidic in nature.

According to standard PH scale ranges;

So in this solution PH of solution is 8. According to standard criteria unknown solution is acidic in nature.

The partial pressure of N2 gas in the flask, after subtracting the vapor pressure of water from the total pressure, is 720 torr.

To determine the partial pressure of N2 gas collected over water, we must subtract the vapor pressure of water from the total pressure of the collected gas according to Dalton's law of partial pressures. Given that the total pressure is 760 torr and the vapor pressure of water at 34°C is 40.0 torr, we can perform the following calculation:

Total pressure = Partial pressure of N2 + Vapor pressure of water .

Therefore, Partial pressure of N2 = Total pressure - Vapor pressure of water

Partial pressure of N2 = 760 torr - 40.0 torr

Partial pressure of N2 = 720 torr

The partial pressure of N2 gas in the flask is 720 torr.

The partial pressure of N2 gas in the flask is 720 torr.

To find the partial pressure of N2 gas, we need to subtract the vapor pressure of water from the total pressure of the collected gas. The total pressure is given as 760 torr, and the vapor pressure of water at 34°C is 40.0 torr.

The partial pressure of a gas in a mixture is calculated using Dalton's Law of Partial Pressures, which states that the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of each individual gas. Mathematically, this can be expressed as:

[tex]\[ P_{\text{total}} = P_{\text{gas 1}} + P_{\text{gas 2}} + \ldots + P_{\text{gas }n} \][/tex]

where [tex]\( P_{\text{total}} \)[/tex] is the total pressure and [tex]\( P_{\text{gas }i} \)[/tex] is the partial pressure of the i-th gas.

In this case, the total pressure [tex]\( P_{\text{total}} \)[/tex] is 760 torr, and it is composed of the partial pressure of N2 gas [tex]\( P_{\text{N2}} \)[/tex] and the vapor pressure of water [tex]\( P_{\text{H2O}} \)[/tex]:

[tex]\[ P_{\text{total}} = P_{\text{N2}} + P_{\text{H2O}} \][/tex]

We can rearrange this equation to solve for [tex]\( P_{\text{N2}} \)[/tex]:

[tex]\[ P_{\text{N2}} = P_{\text{total}} - P_{\text{H2O}} \][/tex]

Substituting the given values:

[tex]\[ P_{\text{N2}} = 760 \text{ torr} - 40.0 \text{ torr} \] \[ P_{\text{N2}} = 720 \text{ torr} \][/tex]

Therefore, the partial pressure of N2 gas in the flask is 720 torr.

Final answer:

The density of the liquid is found by dividing its mass, 0.115 grams, by its volume, 0.265 milliliters, resulting in a density of 0.434 g/mL.

Explanation:

To calculate the density of a liquid, we divide its mass by its volume. In the case of the liquid with a mass of 0.115 grams and a volume of 0.000265 liters, we first convert liters to milliliters (since the density is asked for in g/mL), knowing that 1 L = 1000 mL. Therefore, the volume in milliliters is 0.000265 L × 1000 mL/L = 0.265 mL.

Now we can calculate the density using the formula: Density = Mass/Volume. Substituting the given values: Density = 0.115 g / 0.265 mL = 0.434 g/mL.

Convection: the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.

hope that helps :)

B a neutron because it is neutral

The reaction used 82 g of the unknown chemical.

The word equation is  

Chemical 1 + Chemical 2 → Products  

     32 g    +         x g        →     114 g  

The Law of Conservation of Mass tells us the total mass of the reactants must equal the mass of the products. Then  

32 g + x g = 114 g  

x = 114 – 32 = 82

The mass of Chemical 2 was 82 g.  

Blue is the color that can be best absorbed, as orange is the color seen.

The compound is S₂O₂ or disulfur dioxide.

S₂O₂ contains two atoms of sulfur and two atoms of oxygen.

It is also known as the dimer of  sulfur monoxide, SO.

Both sulfur and oxygen are nonmetals. So when naming nonmetals we put a prefix before them. 'di' means 2. Since there are two atoms of each element of  sulfur and oxygen, we name S₂O₂ as disulfur dioxide.

Answer:

The compound is S₂O₂ or disulfur dioxide.

Explanation:

Answer:

The answer is 1.55 × 1024 on edg.

Explanation:

number with fewer significant figures.

i am pretty sure it is 4

[tex]n(\text{C}_3\text{H}_7\text{OH}) = N(\text{C}_3\text{H}_7\text{OH}) / N_A\\ \phantom{n(\text{C}_3\text{H}_7\text{OH})} = 5.2 \times 10^{21} / (6.02 \times 10^{23})\\ \phantom{n(\text{C}_3\text{H}_7\text{OH})} = 8.6 \times 10^{-3} \; \text{mol}[/tex]

where [tex]N_A = 6.02 \times 10^{23}\; \text{mol}^{-1}[/tex] the Avogadro's constant that relates the number of particles to their number, in the unit moles [tex]\text{mol}[/tex].

The molar mass of propanol- mass per mole propanol- can be directly deduced from its molecular formula with reference to a modern periodic table.

[tex]M(\text{C}_3\text{H}_7\text{OH}) = \underbrace{3 \times 12.01}_{\text{carbon}} + \underbrace{8 \times 1.008}_{\text{hydrogen}} + \underbrace{1\times 16.00}_{\text{oxygen}} = 60.09 \; \text{g} \cdot \text{mol}^{-1}[/tex]

[tex]8.6 \times 10^{-3} \; \text{mol}[/tex] of propanol molecules would thus have a mass of [tex]8.6 \times 10^{-3} \; \text{mol} \times 60.09 \; \text{g} \cdot \text{mol}^{-1} = 0.52 \; \text{g}[/tex]

conduction:   Conduction is how heat transfers through direct contact with objects that are touching.

I am not exactly sure the answer that you are looking for, but I will guess on what you might be looking for. If the weight of an object is greater than the weight of the liquid it's being put into, the object will sink. Although, it isn't necessarily just based upon weight, it is more dependent on density to decide if it'll float or sink.

Answer:

It will sink

Explanation:

Hi, this is the result of the Archimedes principle, that states that the push force an object receives from the liquid it is submerged in, is proportional to the volume it displace.

As can be seen in the figure, there are two opposite forces interacting, the weight of the object (P) and the push force (E).

In equations:

[tex]P=m*g[/tex] where g is gravity

[tex]E=\rho_{liq}*V_{liq}*g[/tex]

Also [tex]\rho_{liq}*V_{liq}=m_{liq}[/tex]

So: [tex]\frac{P}{E}=\frac{m*g}{m_{liq}*g}[/tex]

[tex]\frac{P}{E}=\frac{m}{m_{liq}}[/tex]

If m is higher than m_liq, it means that P is higher than E and the object will sink.

Jupiter, I believe?

The distance between Jupiter, which is 778.6 million kilometers, and the Sun is approximately 5.2 Astronomical Units (AU). An AU, or the average distance from Earth to the Sun, is approximately 149.6 million kilometers.

The planet whose distance from the Sun is approximately 778,600,000 km is Jupiter. Consider that 1 Astronomical Unit (AU) - the average distance from the Earth to the Sun - is about 149,597,870,700 meters or 149.6 million kilometers. So, when we compare this to the distance of Jupiter, we find it's around 5.2 AU from the Sun. Jupiter, being the largest planet in our solar system and located beyond the asteroid belt, is indeed far from the sun. However, this increases its year length, experiencing longer periods between each full orbit of the Sun.

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In the given chemical reaction, if equal volumes of ethane ([tex]C_{2} H_{6}[/tex]) and oxygen ([tex]O_{2}[/tex]) are combined, ethane will be the gas left over after the reaction due to its larger required volume of oxygen for complete combustion. The exact volume of ethane remaining can be calculated using stoichiometry and the proportions of the balanced equation.

The balanced chemical reaction is

[tex]\[2C_2H_6(g) + 7O_2(g) \rightarrow 4CO_2(g) + 6H_2O(g)\][/tex]This implies that 2 moles of ethane [tex]C_{2} H_{6}[/tex] react with 7 moles of oxygen([tex]O_{2}[/tex]) to produce carbon dioxide ([tex]CO_{2}[/tex]) and water ([tex]H_{2} O[/tex]) by the process of combustion. As per Avogardo's law, the volume of gases is directly proportional to the number of moles, when the conditions (pressure, temperature) are kept constant.

Since you are starting with equal volumes of ethane and oxygen (14 L), and since ethane requires more oxygen to react (3.5 volumes of oxygen for each volume of ethane), there will not be enough oxygen present to react with all of ethane. Thus, it will be ethane ([tex]C_{2} H_{6}[/tex]) gas that is leftover after the reaction. The volume of that gas remaining can be calculated using stoichiometry and the proportions of the balanced equation.

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The equilibrium means that amount that are coming equals the amount that are going.

So the correct answers are

2. A person's income and expenses are equal every month.

3. The pressure exerted on the inside of a balloon by the gas inside is equal to the pressure exerted on the outside of the balloon by the atmosphere.

-Hiadamcom/From Agarvated

Answer:

A person's income and expenses are equal every month.

The pressure exerted on the inside of a balloon by the gas inside is equal to the pressure exerted on the outside of the balloon by the atmosphere.

Explanation:

In equilibrium there is balance always.  

Option A is incorrect. Equilibrium would be maintained if the water that falls out of the faucet is re-entered into the faucet.  

Option B is correct. As the income and expense of the person is equal, so what the person spends is equal to what he earns. So the person neither spends more than his income goes to debt nor does the person has some money left after his spending to save or invest.  

Option C is correct. As the pressure exerted on the inside of a balloon by the gas inside is equal to the pressure exerted on the outside of the balloon by the atmosphere, the balloon does not burst. The air pressure is balanced on either side of the balloon.  

Option D is incorrect. Equilibrium would be maintained if the heat gained is equal to the heat lost.  

Erosion caused the grand canyon to form

This would be either chemical weathering or erosion.

See, the rock was broken down and cracked by any sort of weathering or erosion. It could've been caused by either one of those, honestly.

Have a great day :)

Collision theory is reliable because it gives a repeatable measure for predicting necessary conditions for reactions, is supported by extensive experimental data, and aligns with scientific principles, only offering limitations when relativistic speeds are involved.

Collision theory is considered well-established and highly reliable because it provides a repeatable measure for predicting the conditions necessary for chemical reactions. These conditions typically include the energy threshold that reacting particles must overcome known as activation energy, and the proper orientation during collisions. This theory is supported by numerous experiments, and no experiment has so far contradicted its postulates. As with the transition from hypothesis to theory in scientific disciplines, collision theory's predictions have been consistently validated by experimental data, making it reliable in the study of reaction rates and mechanisms. It should be noted that the application of collision theory is restricted to non-relativistic speeds, as at relativistic velocities encountered in particle physics, relativistic mechanics would be necessary for correct analysis.

Furthermore, the theory's ability to generalize across various types of collisions, provided we stay in one dimension and minimize external influences such as friction, adds to its dependability. However, in practical applications, especially regarding high-energy collisions between particles like in particle accelerators, adjustments are made to account for the relativistic speeds.

The terms of a equation, the momentum of an object is equal to the mass of the object times the velocity of the object. where m is the mass and v is the velocity

             The three possible stereoisomers of 1,3-cyclopentanediol are as follow,

                  i) (1S,3R)-1,3-Cyclopentanediol

                  ii) (1R,3R)-1,3-Cyclopentanediol

                  iii)  (1S,3S)-1,3-Cyclopentanediol

Structures of all three compounds are attached below.

Stereoisomers: Also known as spatial isomers are those isomers which have same molecular formula and structural formula but the groups about the chiral center occupy different orientation in space.

Enantiomers: These are stereoisomers of each other which are non-identical mirror-images of each other.

Diastereomers: These are stereoisomers which are not mirror images of each other.

Meso Compounds: These are those isomers which are superimposible on its mirror image.