E=hv h= 6.62 x 10^-34 m^2 kg/ s

What would be the energy contained in a photon of light that has a frequency of 5.0 x 10^12?

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Identify the substance as an acid or a base and put an "X" in the box lemon juice is the acid sodium hydroxide is the base and ammonia is the weak base and HCl is the strong acid

An acid is the any hydrogen containing substances that is capable of donating a proton to another substances and base is the molecule or ion able to accept a hydrogen ion from acid and acidic substances are usually identified by their sour taste and here given example are lemon juice acidic because they contain high amount of citric acid and sodium hydroxide is the base because they dissociate completely into the solution to form hydroxide ion and ammonia is the weak base because nitrogen atom has electron pair that easily accept a proton and HCl is the strong acid because  it dissociate almost completely

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The final value for the enthalpy change of the formation of CO2 and 2H2O from their elements (C, H2, and O2) would be -1410 kJ per mole of CO2 and 2 moles of H2O formed.

The enthalpy change (ΔH) for the reaction CO2 + 2H2O → H2CO3 can be calculated by multiplying the stoichiometric coefficients of the balanced equation by the enthalpy values of the corresponding compounds involved in the reaction.

In the given reaction, the enthalpy change is -1410 kJ. However, it's important to note that this enthalpy change corresponds to a specific reaction and may not directly apply to the formation of CO2 and 2H2O from another reaction or process.

If we assume that the reaction is the formation of one mole of CO2 and two moles of H2O, we can say that the enthalpy change for this specific formation reaction is -1410 kJ.

Therefore, the final value for the enthalpy change of the formation of CO2 and 2H2O from their elements (C, H2, and O2) would be -1410 kJ per mole of CO2 and 2 moles of H2O formed.

It's worth mentioning that the enthalpy change can vary depending on the specific conditions (temperature, pressure, etc.) and the reactants involved in the reaction. Therefore, it's crucial to specify the conditions and reaction context when referring to enthalpy values.

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\(2.3+0.005+0.234+60.12=\boxed{62.659 \text{ g}}\)

Answer:

E°(Ag⁺/Fe°) = 0.836 volt

Explanation:

3Ag⁺ + 3e⁻ => Ag°;            E° = +0.800 volt

Fe° => Fe⁺³ + 3e⁻ ;             E° = -0.036 volt

_________________________________

Fe°(s) + 3Ag⁺(aq) => Fe⁺³(aq) + 3Ag°(s) ...    

E°(Ag⁺/Fe°) = E°(Ag⁺) - E°(Fe°) = 0.800v - ( -0.036v) = 0.836 volt

Answer: suspensions  are a mixture in which solute particles do not disolve. An example is oil and water, oil and water or even flour and water; oil can’t disolve in water

Answer:

Noun: a mixture in which particles are dispersed throughout the bulk of a fluid.

Adjective: the state of being dispersed in a fluid.

Explanation:

I used a dictionary lol

The effluent flow in concentration and particulate mass flow will be 0.198m³/sec.

It should be noted that the total inflow will be equal to the total outflow. Therefore,

0.2 + 0.048 = 0.05 + We

Collect like terms

Qe = 0.2 + 0.048 - 0.05

Qe = 0.198m³/sec

The concentration will be:

= (360 × 1000)/0.05

= 7200mg/L.

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Answer:

You answer is correct

Electrons have a negative charge. The charge on the proton and electron are exactly the same size but opposite. Neutrons have no charge.

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The heat that is absorbed by the system is  1363 J. Option B

We know that in a chemical reaction that there could be the absorption or the evolution of heat. We say that there is the evolution of heat when heat has been lost from the system and there is the absorption of heat when heat has been gained by the system.

Number of moles of the barium hydroxide hydrate = 3.15 g/203 g/mol

= 0.015 moles

Number of moles of the ammonium thiocyanate = 1.52/76 g/mol

= 0.02 moles

If 1 mole of barium hydroxide hydrate reacts with 2 moles of  ammonium thiocyanate

0.015 moles of barium hydroxide hydrate reacts with 0.015 * 2 moles/1 mole

= 0.03 moles

Hence the limiting reactant is the ammonium thiocyanate.

Now the heat that is absorbed is;

H = mcdT

m = mass of the water

c = Heat capacity

dT = Temperature change

H = 100 * 4.20 * 3.1

H = 1363 J

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Answer:Many nocturnal animals have a mirror-like layer, called the tapetum, behind the retina, which helps them make the most of small amounts of light.

Explanation:

The temperature of the gas in Kelvin, after its volume is reduced to 2,450 mL, is approximately 143.27 K.

To determine the temperature of the gas in Kelvin after its volume is reduced, we can use the combined gas law, which relates the initial and final conditions of pressure, volume, and temperature for a given amount of gas.

The combined gas law equation is:

(P₁ * V₁) / T₁ = (P₂ * V₂) / T₂

Where P₁ and P₂ are the initial and final pressures, V₁ and V₂ are the initial and final volumes, T₁ is the initial temperature in Kelvin, and T₂ is the final temperature in Kelvin.

Given that the initial volume V₁ is 3,480 mL, the initial temperature T₁ is -70.0 °C (which needs to be converted to Kelvin), and the final volume V₂ is 2,450 mL, we can substitute these values into the equation.

To convert -70.0 °C to Kelvin, we add 273.15 to it, resulting in T₁ = 203.15 K.

Now we can solve for T₂:

(T₂ * V₁) / T₁ = V₂

T₂ = (V₂ * T₁) / V₁ = (2,450 mL * 203.15 K) / 3,480 mL

Simplifying the equation, we find:

T₂ ≈ 143.27 K

Therefore, the temperature of the gas in Kelvin, after its volume is reduced to 2,450 mL, is approximately 143.27 K.

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Answer:

The answer is Diffusion.

Answer:

Hypertonic

Explanation:

Answer:

B

Explanation:

Option B is correct because you have 6 vertices, indicating that there ate 6 carbons in the compound.

In order to make the heat values obtained from the equation q=mCsT equal to one another, we set them to that value. (Specific heat capacity: 0.380 J/g) 57.8 block of copper

Your capacity or the quantity something can hold are both described by the word capacity. You cannot squeeze another feathery companion into a cage that is already overcrowded without risking the claustrophobia of the birds.

Capacity, particularly corporate expansion, unquestionably has a quantifiable impact on every firm. Because it directly affects a company's capacity to expand, compete, and create and maintain a pleasant customer experience, capacity planning is extremely important to business success.

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Answer:

Therefore, the answer is none of the above; all options are associated with the triangle.

Explanation:

In an isosceles right triangle, the two legs are congruent, and each angle other than the right angle is 45 degrees. Since the hypotenuse of the triangle is 6 units, each leg has a length of:

leg length = hypotenuse / √2 = 6 / √2

This can be simplified by multiplying the numerator and denominator by √2:

leg length = (6 / √2) * (√2 / √2) = 6√2 / 2 = 3√2

Therefore, the length of each leg is 3√2 units.

Option (c) 6√2 is associated with the triangle as it is the length of the hypotenuse.

Option (a) 45° degrees is associated with the triangle as it is one of the acute angles of the isosceles right triangle.

Option (b) 90° degrees is associated with the triangle as it is the right angle of the isosceles right triangle.

Option (d) 3√2 is associated with the triangle as it is the length of each leg of the isosceles right triangle.

Therefore, the answer is none of the above; all options are associated with the triangle.

Answer:

Any device that contains electronic parts

The most suitable choice is "likely" to convey the doubt or uncertainty regarding the boss's willingness to agree. Option B)

Based on the given context, the word that best fits the sentence is "likely."

The sentence implies that the speaker doubts the boss's willingness to agree with something. In this case, "likely" expresses the probability or possibility of the boss agreeing. It suggests that the boss is not expected to be receptive or open to the idea.

"Probable" implies a higher degree of certainty or likelihood, which may not be suitable in this context since the sentence indicates skepticism about the boss's agreement.

"Suitable" means appropriate or fitting, but it does not convey the sense of agreement or willingness.

"Talkative" refers to someone who is inclined to talk a lot, which is unrelated to the boss's agreement.

Therefore, the most suitable choice is "likely" to convey the doubt or uncertainty regarding the boss's willingness to agree. Hence option B) is correct.

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The equation that can be able to complete the reaction as it has been shown is option C

Free energy takes into account both the enthalpy (heat content) and entropy (degree of disorder) of a system. It provides a measure of the system's ability to do useful work or drive chemical reactions.

The formula for calculating free energy is:

G = H - TS

where:

G is the Gibbs free energy

H is the enthalpy (heat content) of the system

T is the temperature in Kelvin

S is the entropy (degree of disorder) of the system

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The chemical equation is

\(\rm Ca(NO_ 3)_2 (aq) + 2KCl (aq) \rightarrow CaCl_2 + 2KNO_3\)

Chemical equation is defined as a symbolic representation of a chemical reaction in the form of symbols, in which the reactants and products are expressed in terms of their respective chemical formulas. It can also be called as chemical reactions.

There are basically six types of chemical reactions.

Thus, the chemical equation is

\(\rm Ca(NO_ 3)_2 (aq) + 2KCl (aq) \rightarrow CaCl_2 + 2KNO_3\)

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Solution :

The relationship between pH and \($[H_3O^+]$\)  is pH = \($- \log [H_3O^+]$\)

The concentration of \($[H_3O^+]$\) is given as

pH = \($- \log [H_3O^+]$\)

\($[H_3O^+]=10^{-pH}$\)

           \($=10^{-1.510}$\)

          \($=3.09 \times 10^{-2}$\)

Therefore, the concentration of \($[H_3O^+]$\) is \($=3.09 \times 10^{-2}$\)

The relationship between pH and \($[H_3O^+]$\)  is pH = \($- \log [H_3O^+]$\)

The concentration of \($[H_3O^+]$\) is given as

pH = \($- \log [H_3O^+]$\)

     \($=- \log[0.15]$\)

    = 0.82

Therefore, the pH of the solution is 0.82

Now updating the ICE table for 0.15 M \($CH_3COOH$\) is as follows :

              \($CH_3COOH \ \ \ + \ \ \ H_2O \ \ \rightleftharpoons \ \ CH_3COO^- \ \ + \ \ H_3O^+$\)

\($I\ (M)$\)           0.15                                         0                      0

\($C\ (M)$\)            -x                                           +x                    +x

\($E\ (M)$\)          0.15 - x                                      x                      x

∴ Acidionization constant,

\($K_a=\frac{[CH_3COO^-][H_3O^+]}{[CH_3COOH]}$\)

\($1.82 \times 10^{-5}=\frac{(x)(x)}{(0.15-x)}$\)

\($1.82 \times 10^{-5}=\frac{x^2}{(0.15-x)}$\)

We can assume that :  (0.15 - x) M = 0.15 M

\($1.82 \times 10^{-5}=\frac{x^2}{0.15}$\)

\($x^2=1.82 \times 10^{-5} \times 0.15$\)

\($x^2=2.7 \times 10^{-6}$\)

\($x=1.7 \times 10^{-3} \ M$\)

Therefore, from the equilibrium table,  \($[H_3O^+] =x=1.7 \times 10^{-3} \ M$\)

pH = \($- \log [H_3O^+]$\)

     \($=- \log(1.7 \times 10^{-3} \ M)$\)

     = 2.77

Hence the pH of 0.15 M  \($CH_3COOH$\) is 2.77

Stronger acid always have a lower pH value.

The value of pH for the given solution are 0.0, 7.45, 0.82 and 2.77

So the increasing order of the acidity is :

pH = 0.0 > pH = 0.82 (0.15 M HCl) > pH = 2.77 (0.15 M \($CH_3COOH$\)) > pH =7.45

Hydronium ion concentration can be calculated to know the pH of the solution. The increasing order of acidity is 0, 0.82, 2.77, and 7.45.

pH is the negative logarithm of the hydronium ion concentration. The hydronium ion concentration can be calculated as:

\(\begin{aligned}\rm pH &= \rm - log [H_{3}O^{+}]\\\\&= 10^{-1.510}\\\\&= 3.09 \times 10^{-2}\end{aligned}\)

Thus, the hydronium ion concentration is 0.0309.

The pH when the hydronium ion concentration is 0.15, can be calculated as,

\(\begin{aligned}\rm pH &= \rm - log [H_{3}O^{+}]\\\\&= \rm -log (0.15)\\\\&= 0.82\end{aligned}\)

Thus, the pH of the solution is 0.82.

Now the acid ionization constant is calculated using the ICE table as,

\(\begin{aligned}\rm K_{a} &= \rm \dfrac{[CH_{3}COO^{-}][H_{3}O^{+}]}{[CH_{3}COOH]}\\\\1.82 \times 10^{-5} &= \rm \dfrac{(x)(x)}{(0.15-x)}\end{aligned}\)

Assuming that (0.15- x) = 0.15 M then,

\(\begin{aligned} 1.82 \times 10^{-5} &= \dfrac{x^{2}}{(0.15-x)}\\\\\rm x^{2} &= 2.7 \times 10^{-6}\\\\&= 1.7 \times 10^{-3}\;\rm M\end{aligned}\)

Now, calculating pH of 0.15 M acetic acid is calculated as:

\(\begin{aligned}\rm pH &= \rm - log [H_{3}O^{+}]\\\\&= \rm -log (1.7 \times 10^{-3})\\\\&= 2.77\end{aligned}\)

The stronger the acid lower will be the pH value. The pH of the solutions is 0.0, 7.45, 0.82, and 2.77.

Therefore, the correct order of the increasing acidity is 0.0 > 0.82 > 2.77 > 7.45.

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Answer:

C. 2,3,3,4-tetramethylhexane

Explanation:

Answer:

305.15

Explanation:

32 celsius converted to kelvin is 305.15 kelvin

Formula

32°C + 273.15 = 305.15K

The savanna grassy plain environment would best support large land animals like giraffes elephants and lions.

A dry climate with a distinct wet and dry season, as well as moderate to high temperatures is observed in savannas. Grass species which can withstand seasonal droughts and frequent fires, predominate in savanna vegetation. Although they are more widely spaced than in other forested environments, trees and shrubs are still present.

Large land animals thrive in the savanna because it offers a variety of food sources, such as grasses, leaves and fruits, as well as plenty of room to move around and find resources. Animals can see each other clearly and communicate effectively in the open grasslands and the scatted trees and shrubs provide shelter from the sun and wind.

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Answer:

The atmosphere is the thin envelope of gas molecules surrounding the Earth; it is held down by Earth's gravitational pull. The atmosphere is concentrated at the Earth's surface and rapidly thins as you move upward, blending with space at about 100 miles above sea level

Explanation: science

Answer:

Öncelikle burda soru Why is the earth atmosphere located above earth crust yani Türkçe olarak Dünya atmosferi neden yer kabuğunun üzerinde yer alıyor diyor

The ideal gas law may be used to determine the volume of oxygen created in the electrolysis that produces 548 litres of hydrogen at STP (Standard Temperature and Pressure). PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature, according to the ideal gas equation.

The pressure is 1 atm, the temperature is 273 K, and the number of moles of hydrogen is 548/22.4 = 24.5 in this example. We may compute the volume of oxygen created by rearranging the ideal gas law: V = nRT/P = 24.5*0.082*273/1 = 483.3 litres.

As a result, the volume of oxygen created in the electrolysis at STP that produces 548 litres of hydrogen is 483.3 litres.

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The number of grams of sulfuric acid in 1 gallon of battery acid if the solution has a density of 1.31 g/mL and is 38.5 % sulfuric acid by mass is 1854.62 g

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Answer:

The answer is C

Explanation:

It just makes the most sense to me

Answer:

B. 35 the atomic number is equal to the proton number