Which choice correctly describes the energy transfer in one food chain of this partial food web?


a Energy is transferred from the energy from white spruce to spruce grouse to lynx.

b Energy is transferred from soapberries to snowshoe hare to lynx.

c Energy is transferred from lynx to red squirrel to white spruce.

d Energy is transferred from soapberries to red squirrels to coyotes to lynxes.

Answer:

Higher melting and boiling points signify stronger noncovalent intermolecular forces. Consider the boiling points of increasingly larger hydrocarbons. More carbons means a greater surface area possible for hydrophobic interaction, and thus higher boiling points.

Answer:

0.25 of the original

Explanation:

(0.5)^(90/45)

The fraction of iron-59 after 90 days is 0.25.

Iron-59 decays following first-order kinetics. Given the half-life (\(t_{1/2}\)) of 45 days, we can calculate the rate constant (k) using the following expression.

\(k = \frac{ln2}{t_{1/2}} =\frac{ln2}{45day} = 0.015 d^{-1}\)

For first-order kinetics, we can find the fraction of Fe ([Fe]/[Fe]₀) after and an elapsed time (t) of 90 days, using the following equation.

\(\frac{[Fe]}{[Fe]_0} =e^{-k \times t } = e^{-0.015 d^{-1} \times 90 d } \approx 0,25\)

The fraction of iron-59 after 90 days is 0.25.

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Answer:

Calculate the frequency of light having wavelength of 456 nm.

1.22*10^8nm

Explanation:

In the given question, \(6.58 \times 10^{14}\) Hz is the frequency of the light with a wavelength of 456 nm.

Frequency is a measure of the number of cycles of a periodic wave that occur per unit of time.

The frequency of light can be calculated using the following equation:

frequency = speed of light / wavelength

where the speed of light is a constant equal to \(\rm 3 \times 10^8 \ m/s\).

To use this equation, we need to convert the wavelength from nanometers to meters:

456 nm = \(\rm 456 \times 10^{-9}\ m\)

Now, we can substitute the values into the equation:

frequency =  \(\rm 3 \times 10^8 \ m/s\) / \(\rm 456 \times 10^{-9}\ m\)

=  \(6.58 \times 10^{14}\) Hz

Therefore, the frequency of light with a wavelength of 456 nm is  \(6.58 \times 10^{14}\) Hz.

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Answer:

The compound that is not an organic alcohol is C6H5COOH.

C3H7OH is propyl alcohol, CH3CH(OH)CH3 is 2-propanol, and (CH3)2CHCH(OH)CH2CH3 is 3-pentanol, all of which are organic alcohols.

On the other hand, C6H5COOH is benzoic acid, which is not an alcohol but an organic acid. It contains a carboxylic acid (-COOH) functional group and not the -OH functional group of alcohols.

Answer:

it is the element cobalt with atomic number 27

Answer:

When sugar dissolves,these whole sucrose molecules separate from one another

The usual enthalpy change for the 200g/7.68 mol of ethyne reaction is C2H6g C2H2g Plus 2H2g - 2,388.5kJ.

The quantity of heat released or absorbed during a reaction occurring at constant pressure is known as the enthalpy change.

H stands for "enthalpy change," Hf for "system final enthalpy" (i.e., the enthalpy of the byproducts of the system in equilibrium in a chemical reaction), and Hi for "system initial enthalpy" (i.e., the entropy for the reactants in a chemical reaction).

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Answer:

When it comes to how to measure sugar, you need the right measuring tools. All sugar varieties are considered a dry ingredients so use dry measuring cups and measuring spoons.

Explanation: well there are only a few things you can use to measure things that aren't water so this only makes sense.

Answer:

c. I and Ill

Explanation:

SN1 mechanism is a unimolecular nucleophillic substitution reaction mechanism. "Unimolecular" implies that only one molecule is involved in the rate determining step and that is the alkyl halide. The rate determining step of SN1 reaction is the formation of a carbocation which subsequently reacts with a nucleophile in the fast step.

SN1 reactions occur mostly with tertiary alkyl halides due to sterric reasons. SN2 mechanism involves a crowded transition state because it is a concerted reaction mechanism. This is not possible in a tertiary alkyl halide due to the presence of bulky groups around the tertiary carbon atom hence tertiary alkyl halides do not undergo nucleophilic reaction by SN2 mechanism.

Secondly, polar solvents aid in the ionization of the alkyl halide thus assisting in the formation of the carbocation which participates in the second step of the reaction.

Answer:

87469.73J

Explanation:

72.25g/0.826kJ/g=87.4697337kJ

Answer:

molecules can be much bigger. one molecule of vitamin c is made up of 20 atoms (6 carbons, 8 hydrogens, and 6 oxygens

Answer:

\(5.12*10^2^3\) atoms

Explanation:

\(0.85 moles Fe*\frac{6.022*10^2^3}{1 mole Fe} =5.12*10^2^3\)

Use dimensional analysis to convert to moles by putting the moles of Fe (iron) on top and multiply by Avogadro's constant to cancel out moles and be left with atoms.

The volume of hydrogen gas produced in the reaction of 73 grams of zinc and 73 grams of hydrochloric acid (under normal conditions) is approximately 22.4 liters.

To calculate the volume of hydrogen gas produced in the reaction of zinc and hydrochloric acid, we need to use the principles of stoichiometry and the ideal gas law.

First, let's write the balanced chemical equation for the reaction between zinc (Zn) and hydrochloric acid (HCl):

Zn + 2HCl →\(ZnCl_2\)+ H2

From the equation, we can see that one mole of zinc reacts with two moles of hydrochloric acid to produce one mole of hydrogen gas. To determine the number of moles of zinc and hydrochloric acid, we need to convert the given masses into moles.

The molar mass of zinc (Zn) is approximately 65.38 g/mol, so 73 grams of zinc is equal to:

73 g Zn * (1 mol Zn / 65.38 g Zn) ≈ 1.116 mol Zn

Similarly, the molar mass of hydrochloric acid (HCl) is approximately 36.46 g/mol, so 73 grams of HCl is equal to:

73 g HCl * (1 mol HCl / 36.46 g HCl) ≈ 2.002 mol HCl

According to the balanced equation, the reaction produces one mole of hydrogen gas for every two moles of hydrochloric acid. Therefore, since we have 2.002 moles of HCl, we expect to produce half that amount, or approximately 1.001 moles of hydrogen gas.

To calculate the volume of hydrogen gas, we can use the ideal gas law, which states:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature. In this case, we assume the reaction is conducted under normal conditions, which means a pressure of 1 atmosphere and a temperature of 273.15 Kelvin.

Rearranging the equation to solve for V, we have:

V = nRT / P

Substituting the values, we get:

V = (1.001 mol) * (0.0821 L·atm/(mol·K)) * (273.15 K) / (1 atm) ≈ 22.4 L

Therefore, the volume of hydrogen gas produced in the reaction is approximately 22.4 liters.

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Answer:

Domain

Explanation:

The broadest taxonomic group for classifying living organisms is the kingdom," as taxonomy is the science of categorizing and classifying living organisms based on their characteristics and evolutionary relationships. So the second option is correct.

The taxonomic hierarchy allows scientists to systematically organize and classify the incredible diversity of living organisms on Earth. It also helps in understanding the evolutionary relationships and shared characteristics among different groups of organisms. The broadest level in the taxonomic hierarchy, the kingdom, represents the major categories of life. All living organisms on Earth are classified into one of these five kingdoms based on their fundamental characteristics.

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complete question is below

The broadest taxonomic group for classifying living organisms is the blank,

class,

kingdom,

species,

family

Answer:

1)  \(molality = 0.19\)

2)  \(Mole\ fraction= 0.003486\)

3)\(Mass\ percent = 2.8%\)

Explanation:

Concentration of Tartaric acid=0.190mole /l

1)

Generally

\(Mass\ of\ tartaric\ acid = 150.087 *0.190\)

\(Mass\ of\ tartaric\ acid = 28.5 g\)

Since 1L of solution tartartic acid is

\(T_{1l}= density * volume\)

\(T_{1l}= 1.016Kg / L X 1 L\)

\(T_{1l}= 1016\)

Therefore

\(Mass of solvent = 1016-28.5\)

\(Mass of solvent = 987.5 g\)

Generally the equation for molality is mathematically given by

\(molality = \frac{moles}{Kg}\)

\(molality = \frac{0.190 * 1000}{987.5}\)

\(molality = 0.19\)

2.

Generally the equation for Moles of water  is mathematically given by

\(Moles\ of\ water = \frac{mass}{mol wt}\)

\(Moles\ of\ water = \frac{987.5}{18 }\)

\(Moles\ of\ water= 54.86\)

Therefore

\(Mole\ fraction = \frac{Moles\ of\ solute}{total\ moles}\)

\(Mole\ fraction= \frac{0.190}{54.5}\)

\(Mole\ fraction= 0.003486\)

3

Generally the equation for Mass Percent is mathematically given by

\(Mass\ percent = \frac{mass\ of\ tartaric\ acid}{total mass}\)

\(Mass\ percent = \frac{28.5* 100}{1016}\)

\(Mass\ percent = 2.8%\)

The oceans absorb the most sunlight from the options that we have here.

Seventy-one percent or more of the surface of the Earth is covered by the oceans. The result is that they get a lot of sunshine. The upper layers of the ocean absorb a large amount of the incoming solar energy, which enters the ocean waters.

Solar radiation is efficiently absorbed by water, especially in the visible light spectrum. The ocean heats the water as a result of absorbing sunshine. The oceans' ability to absorb solar energy is vital for driving a variety of marine phenomena, including currents, circulation patterns, and temperature distribution, as well as managing Earth's climate.

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Answer:

The answer is A. Oceans.

Explanation:

I did the test.

The volume of acid we will require in this situation is 27000 mL.

We are aware that understanding the reaction equation is necessary because it is the first step in resolving the issue at hand;

Having said that,

CaCO3 + 2HCl → CaCl2 + H2O + CO2

Acid molarity = antilog (-1.55).

The number of base moles;

38 g/100 g/mol

= 0.38 moles

If 2 moles of acid and 1 mole of base combine;

The base responds with 0.38 * 2/1 moles.

= 0.76 moles

Volume = n/M

= 0.76/ 0.028

= 27 L or 27000 mL

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\(K_{sp}\) of the compound is found to be  5.04 ×\(10^{-10}\).

Solubility :Solubility can be define as the amount of a substance that dissolves or mixes in a given amount of solvent at specific conditions.

Solubility equilibrium

Ksp = \([A^{+} ]^{a}\) \([B^{-} ]^{b}\)

Ksp = solubility product constant

A+ = cation in an aquious solution

B- = anion in an aqueous solution

a, b = relative concentrations of a and b

Given,

Solubility = s = 3.60 × \(10^{-2}\) g/L

molar mass = 288 g/ mol

∴ s= 3.60 × \(10^{-2}\) g/L ÷ 288 g/ mol = 1.25 ×\(10^{-4}\) mol/ L

Reaction:

MX3 ⇄ M + 3X

           s       3s

\(K_{sp}\) =[ \(M^{+3}\)] [ \(X^{-1}\)\(]^{3}\) = solubility product

∴ \(K_{sp}\) =\([s]^{} [3s]^{3}\)

∴ \(K_{sp}\) = 3 \(s^{4}\)

∴ \(K_{sp}\) = 3 × (3.60 × \(10^{-2}\) \()^{4}\)

∴ \(K_{sp}\) = 503.8848 ×\(10^{-8}\)  = 5.04 ×\(10^{-10}\)

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The first question has an answer of A: the bulb turns 60 J of electrical energy into heat and light every second. It is True that a gas's molecules are significantly more spaced away from one another than those of a solid or liquid.

A heated filament or a gas discharge generate light in a light bulb, an electric device. The light of the bulb is produced by a wire filament that is heated by an electric current. Thomas Edison created the first incandescent light bulb that was commercially viable in 1879, and by creating a useful source of artificial light, it completely changed the way we live today. With the introduction of compact fluorescent bulbs, LED lights, and other technologies, light bulbs have developed over time to become more energy-efficient. Light bulbs today are a necessary part of contemporary life, providing illumination for private residences, commercial buildings, and public areas.

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Answer:

Explanation:

molar mass Cr(NO3)3 = 238 g/mol

Convert 325 ml to liters:  325 mls x 1 L / 1000 mls = 0.325 L

Convert 10.0 g to moles:  10.0 g x 1 mol / 238 g = 0.0420 moles

Molarity = moles/liters = 0.0420 moles / 0.325 L = 0.129 M (3 sig. figs.)

Answer:

(a) Rate of formation of NO2 is also 0.066M/s

(b) Rate of reaction of O2 gas is 0.033M/s

Explanation:

(a) in one second, according to the equation,

2 moles of NO combines with 2moles of NO2.

Therefore 0.066M NO will still consume 0.066mole NO2.

(b) According to the equation,

2 moles NO consumes 1 mole O2, 0.0666M will consume 0.0333 mole O2

Answer:

Explanation:

i dont kow

The complete ionic equation and the net ionic equation for the reaction of aqueous ammonia and aluminum nitrate is written as follows:

\(Al^{3+} (aq)+3(NO_{3})^{-}(aq)+3NH_{4}^{+} (aq) + OH^{-}(aq)\rightarrow Al(OH)_{3}(s)+3NH_{4}^{+}(aq)+NO_{3}^{-}(aq)\)

\(Al^{3+}(aq)+ OH^{-}(aq)\rightarrow Al(OH)_{3}(s)\)

In an ionic equation all the ions are charges are balanced to the proper stoichiometric ratio. The states of each species have to be written in the brackets.

The reaction of aluminum nitrate and aqueous ammonia is written as follows:

\(Al(NO_{3})_{3}(aq) + 3NH_{4}OH(aq)\rightarrow Al(OH)_{3}(s) +3NH_{4}NO_{3}(aq)\)

The complete ionic equation is written below:

\(Al^{3+} (aq)+3(NO_{3})^{-}(aq)+3NH_{4}^{+} (aq) + OH^{-}(aq)\rightarrow Al(OH)_{3}(s)+3NH_{4}^{+}(aq)+NO_{3}^{-}(aq)\)

From this complete ionic equation the net ionic equation can be written by cancelling same species from both side as below:

\(Al^{3+}(aq)+ OH^{-}(aq)\rightarrow Al(OH)_{3}(s)\)

Therefore, the net product aluminum hydroxide is precipitated and the net ionic equation is written as above.

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Answer:

there are approximately 52 moles in 15 grams of lithium.

Answer:

MgCI2+ ___ AgNO3-->___Mg(NO3)2

i think u put 2 before NO3

Explanation:

The de Broglie wavelength of an electron traveling at 1.59×105m/s is  0.4547 x 10⁻⁹ m.

The elementary electric charge of the electron is a negative one, making it a subatomic particle. Due to their lack of known components or substructure, electrons, which are part of the first generation of the lepton particle family, are typically regarded to be elementary particles.

The length scale at which a particle's wave-like characteristics are significant is indicated by its de Broglie wavelength. The symbol or dB is typically used to indicate the De Broglie wavelength. The de Broglie wavelength for a particle with momentum p is given by dB = hp.

λ = h/mv

Where,

λ = wavelength of electron

m = mass of electron = 9.11e-31 kg

v = speed of electron = 1.59 × 10⁵ m/s

h = constant

Therefore,

λ = (6.626x10⁻³⁴J-s) ÷  [(9.11e-31 kg) (1.59 x 10⁵ m/s)]

λ = 0.4547 x 10⁻⁹ m

Thus, The de Broglie wavelength of an electron traveling at 1.59×105m/s is  0.4547 x 10⁻⁹ m.

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