Which response strategy is the best choice for a heavy wet snow with 1 1/2-inch (3. 75 cm) of accumulation?

Answer: 1.8 million years ago

Explanation:

If a cheetah can run 1 meter in 0.0346812 seconds, the cheetah can run 64.5mph.

The average speed of a moving body can be calculated by dividing the distance moved by the body by the time taken. That is;

Average speed = Distance/Time

Average speed = 1m/0.0346812s

Average speed = 28.83m/s.

The average speed in m/s can be converted to mph as follows:

1 metre per second = 2.237 miles per hour

28.83m/s = 64.5mph

Therefore, if a cheetah can run 1 meter in 0.0346812 seconds, the cheetah can run 64.5mph.

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Explanation:

ZnCl\(_{2}\) + H\(_{2}\) ⇒ Zn + 2HCl

The two in 2HCl comes after balancing the equation.

The number of elements  reacting should be equal to the number of products being formed.

The left side of the equation:

ZnCl\(_{2}\) + H\(_{2}\)

has;

1 Zn

2 Cl

and 2 H

while at the right side of the equation:

Zn + HCl

We have;

1 Zn

1 Cl

1 H

Therefore, in order to balance the equation we multiply 2 with both H and Cl.

1 x 2 = 2H

1x 2 = 2Cl

Thus we get;

Zn + 2HCl

The whole number that comes before a compound is called a coefficient and it is used to balance the compound in a chemical equation.

Chemical compounds is defined as those substances which are made up of two or more elements that are chemically combined together.

The combination of two compounds that reacts are called the reactants while the compounds that are formed are called the products.

The reaction that leads to the formation of products needs to be balanced using whole numbers in front of the chemical compounds.

For example,

\(H_{2}\) +\(O_{2}\) --->\(H_{2} O\)

To balance the above equation, the whole number 2 is inserted infront of  hydrogen and the water molecule that is formed. That is,

\(2H_{2} +O_{2} --- > 2H_{2} O\)

Therefore, the whole number that comes before a compound is called a coefficient and it is used to balance the compound in a chemical equation.

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Answer:

answer is a . because they have enough heat is given off during exothermic reaction

Answer: answer is a . because they have enough heat is given off during exothermic reaction

Explanation:

Answer:

Refer to explanation

Explanation:

Weather is the main cause behind most short term environmental changes

For example, a period of heavy rain may lead to a pond overflowing, and flooding the nearby shrubbery

Animals in the area would adapt to this by trying to keep away from the flooded area until it dries out, once the rain ends

The conjugate base of H2SO4 is SO42-, The conjugate base of HSO4- is SO42-, H3O+ dissociates in water to form H3O+ and H2O. The conjugate base of H3O+ is H2O, and NH4+ dissociates in water to form NH3 and H3O+. The conjugate base of NH4+ is NH3.

(a) The balanced equation for the dissociation of H2SO4 in water is:

H2SO4 + 2H2O → 2H3O+ + SO42-

The conjugate base of H2SO4 is SO42-.

(b) The balanced equation for the dissociation of HSO4- in water is:

HSO4- + H2O → H3O+ + SO42-

The conjugate base of HSO4- is SO42-.

(c) The balanced equation for the dissociation of H3O+ in water is:

H3O+ + H2O → H3O+ + H2O

The conjugate base of H3O+ is H2O.

(d) The balanced equation for the dissociation of NH4+ in water is:

NH4+ + H2O → NH3 + H3O+

The conjugate base of NH4+ is NH3.

In each case, the conjugate base is the species that remains after the acid donates a proton (H+) to water. The conjugate base carries a negative charge and is formed by removing a proton from the acid molecule.

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Answer:

Replication

Explanation:

In science, the work of a scientist is regarded as authentic if other experts in other places can follow the same steps as he/she claimed to follow and arrive at the same result.

For example, a scientist in California, United States of America may carry out a research and publish his findings. Another scientist in Christchurch New Zealand following exactly the same procedure is expected to arrive at the same results as the original researcher if there were no errors in the work.

However, where there are disparities in results, the scientist in Newzealand may discover errors that were unknown to the original researcher in the united States. The New Zealand scientist was carrying out a process known as 'replication'. That is, repeating a scientific research in order to obtain the same results thereby validating the research.

Answer:

V ≈ 2.9 L H₂

General Formulas and Concepts:

Chemistry - Atomic Structure

Chemistry - Reactions

Chemistry - Gas Laws

Combined Gas Law: PV = nRT

Temperature Conversion: K = °C + 273.15

Explanation:

Step 1: Define

Unbalanced RxN:   Zn (s) + HCl (aq) → ZnCl₂ (aq) + H₂ (g)

Balanced RxN:   Zn (s) + 2HCl (aq) → ZnCl₂ (aq) + H₂ (g)

Given:   7.68 g Zn, 20.00 °C, 740 mmHg

Step 2: Identify Conversions

Kelvin Conversion

Molar Mass of Zn - 65.39 g/mol

Step 3: Convert

Stoichiometry:   \(7.68 \ g \ Zn(\frac{1 \ mol \ Zn}{65.39 \ g \ Zn} )(\frac{1 \ mol \ H_2}{1 \ mol \ Zn} )\) = 0.117449 mol H₂

Temp Conversion:   20.00 + 273.15 = 293.15 K

Step 4: Find V

Step 5: Check

We are given 2 sig figs as our lowest. Follow sig fig rules and round.

2.9033 L H₂ ≈ 2.9 L H₂

The correct options for A, B, C, D, E and F are true, false, false, false, true and false respectively.

A. True.

According to kinetic molecular theory, lighter gas molecules move with a higher average velocity than heavier gas molecules at a constant temperature.

B. False.

The average kinetic energy of gas molecules at a constant temperature is independent of their mass.

C. False.

A real gas performs at its most optimal when the volume of the container is relatively large and the gas molecules move relatively slowly.

D. False.

The effect of interparticle interactions on the behavior of a gas diminishes as the temperature increases.

I. True.

The number of collisions per unit area increases as more gas molecules are supplied to a container of constant volume and temperature (constant V and T).

F. False.

Kinetic molecular theory states that the pressure remains constant for a constant volume and mole of a gas.

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Your question is incomplete, most probably the complete question is:

Which of the following statements is(are) true? For the false statements, correct them.

a. At constant temperature, the lighter the gas molecules, the faster the average velocity of the gas molecules.

b. At constant temperature, the heavier the gas molecules, the larger the average kinetic energy of the gas molecules.

c. A real gas behaves most ideally when the container volume is relatively large and the gas molecules are moving relatively quickly.

d. As temperature increases, the effect of inter particle interactions on gas behavior is increased.

e. At constant $V$ and $T,$ as gas molecules are added into a container, the number of collisions per unit area increases resulting in a higher pressure.

f. The kinetic molecular theory predicts that pressure is inversely proportional to temperature at constant volume and moles of gas.

The buffer solution has a pH of 7.19.

the common logarithmic of the inverse of the hydrogen ions concentration in moles every cubic decimeter of solution; a measure of a solution's acidity or alkalinity. noun. A pH of 7 refers to pure water, a pH of less than 7 to acid solutions, and a pH of more than 7 to alkaline solutions.

A solution's acidity or alkalinity is indicated by hydrogen ions, or pH. Typically, the pH scale runs from 0 to 14. Acidic and basic and alkaline liquids with such a pH of seven or higher are aqueous at 25 °C, respectively.

moles of KH2PO4 = 11.0 g / 136.09 g/mol = 0.0809 mol

moles of Na2HPO4 = 28.0 g / 141.96 g/mol = 0.197 mol

where pKa is the dissociation constant for the weak acid, which in this case is pKa1 = -log(Ka1) = 2.12.

pH = 2.12 + log(0.197 / 0.0809)

pH = 7.19

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The concentration of dye is monitored during the reaction in this experiment using UV-Vis absorption.

This technique involves measuring the absorption of light by the dye at a particular wavelength. As the dye concentration changes during the reaction, the amount of light absorbed also changes, which can be detected and used to determine the concentration of the dye.
This method involves passing light through the solution and measuring the absorbance of the specific wavelength corresponding to the dye. As the concentration of the dye changes during the reaction, the absorbance will change accordingly, allowing you to monitor the concentration throughout the experiment.

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Answer:

In this reaction, nitrogen acts as the oxidizing agent. Mg is a reducing agent.

Answer:

So yes it True.

Explanation:

A seismometer is the internal part of the seismograph, which may be a pendulum or a mass mounted on a spring; however, it is often used synonymously with "seismograph".

Seismographs are instruments used to record the motion of the ground during an earthquake. They are installed in the ground throughout the world and operated as part of a seismographic network. The earliest "seismoscope" was invented by the Chinese philosopher Chang Heng in A.D. 132. This did not, however, record earthquakes; it only indicated that an earthquake was occurring. The first seismograph was developed in 1890.

A seismograph is securely mounted onto the surface of the earth so that when the earth shakes, the entire unit shakes with it EXCEPT for the mass on the spring, which has inertia and remains in the same place. As the seismograph shakes under the mass, the recording device on the mass records the relative motion between itself and the rest of the instrument, thus recording the ground motion. In reality, these mechanisms are no longer manual, but instead work by measuring electronic changes produced by the motion of the ground with respect to the mass.

A seismogram is the recording of the ground shaking at the specific location of the instrument. On a seismogram, the HORIZONTAL axis = time (measured in seconds) and the VERTICAL axis= ground displacement (usually measured in millimeters). When there is NO EARTHQUAKE reading, there is just a straight line except for small wiggles caused by local disturbance or "noise" and the time markers. Seismograms are digital now - there are no more paper recordings.

I hope this helps:3

A seismograph is placed on the surface of the ground to detect any vibration. Therefore, the given statement is correct.

A seismometer can be described as an instrument that responds to ground noises and shaking such as earthquakes, volcanic eruptions, and explosions. Seismometers are generally attached with a timing device and a recording device to create a seismograph.

The output of such a device is recorded on paper or film, now recorded and processed digitally known as a seismogram. This data is used to locate and characterize earthquakes, and to study the internal structure of the earth.

A seismoscope is used to trigger the device to start recording, and then a recording surface would form a graphical illustration of the tremors automatically.

A seismometer feels the up-down motions of the Earth that move along with any motion detected. The relative motion between the weight and the frame offers a measurement of the vertical ground motion.

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1) Beryllium. This element is in the second group and the second period. The atomic number is 4 which is the number of protons.

The mass number is the sum of neutrons and protons.

Assuming the element has no charge the number of electrons is equal to the number of protons.

Protons: 4.

Neutrons: the mass number - the atomic number = 9 - 4 = 5.

Electrons: 4.

Answer:

20,40,60

Explanation:

Let the three parts be 1x, 2x and 3x

The the sum of three parts will be 1x+2x+3x = 120

6x=120

x=120/6

x=20

1x= 20x1=20

2x= 20x2=40

3x= 20x3=60

So 120 is divided in three parts that is 20,40,60

Answer From Gauth Math

Factor which determines the shape of the spectra in NMR spectroscopy is b) transition between a proton's α and β.So,correct option is b.

Proton  nuclear magnetic resonance (proton NMR, hydrogen-1 NMR, or 1H NMR) is the use of atomic attractive reverberation in NMR spectroscopy as for hydrogen-1 cores inside the particles of a substance, to decide the design of its molecules.[1] In examples where regular hydrogen (H) is utilized, essentially all the hydrogen comprises of the isotope 1H (hydrogen-1; for example having a proton for a core).

Proton NMR spectra of most natural compounds are described by compound changes in the reach +14 to - 4 ppm and by turn coupling between protons. The combination bend for every proton mirrors the wealth of the singular protons.Basic particles have straightforward spectra. The range of ethyl chloride comprises of a trio at 1.5 ppm and a group of four at 3.5 ppm in a 3:2 proportion. The range of benzene comprises of a solitary top at 7.2 ppm because of the diamagnetic ring current.

Hence,correct option is b.

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(Complete question) is:

In NMR spectroscopy, which factor determines the shape of the spectra?

a)the energy of a proton's β spin state

b)the transition between a proton's α and β spin states

c)the number of protons in the macromolecule

d)the energy of a proton's α spin state

Answer:

i have no idea this is to hard for me ;(4

Explanation:

Answer: Van't Hoff factor, i is less than expected from the formula of the compound and this decreases the effective concentration of particles.

Explanation:

Strong electrolytes are defined as the solutions which completely dissociate into their ions.

But, most of the strong electrolytes do not dissociate completely (act ideally) but remain partially undissociated into the ions. Thus, giving a lesser number of ions in the solution than expected.

This means that the Van't Hoff factor, i which denotes the number of ions is less than expected.

As fewer ions are released in the solution, the concentration of the solution is expected to decrease.

Hence, van't Hoff factor, i is less than expected from the formula of the compound and this decreases the effective concentration of particles.

Answer: when two atoms do not share electrons equally in a covalent bond.

Explanation:

Based on the hypothetical ΔG°f values provided and the calculation performed, the standard Gibbs free energy change (ΔG°) for the reaction \($C_9H_8O_4(aq) + H_2O(l) \rightleftharpoons H_3O^+(aq) + C_9H_7O^-_4(aq)\) is determined to be 0 kJ/mol.

To calculate the standard Gibbs free energy change (ΔG°) for the reaction, we can use the standard Gibbs free energy of formation (ΔG°f) values for the compounds involved. The reaction can be written as:

\($C_9H_8O_4(aq) + H_2O(l) \rightleftharpoons H_3O^+(aq) + C_9H_7O^-_4(aq)$\)

The standard Gibbs free energy change for the reaction (ΔG°) is related to the standard Gibbs free energy of formation (ΔG°f) of the products and reactants by the equation:

ΔG° = ΣΔG°f(products) - ΣΔG°f(reactants)

First, we need to look up the ΔG°f values for each compound involved in the reaction.

Let's assume the following hypothetical ΔG°f values:

\($\Delta G^\circ_f(C_9H_8O_4(aq)) = -100 , \text{kJ/mol}$\)

\($\Delta G^\circ_f(H_2O(l)) = -50 , \text{kJ/mol}$\)

\($\Delta G^\circ_f(H_3O^+(aq)) = -80 , \text{kJ/mol}$\)

\($\Delta G^\circ_f(C_9H_7O^-_4(aq)) = -70 , \text{kJ/mol}$\)

Using these hypothetical values, we can calculate the ΔG° for the reaction:

\($\Delta G^\circ = [\Delta G^\circ_f(H_3O^+(aq)) + \Delta G^\circ_f(C_9H_7O^-_4(aq))] - [\Delta G^\circ_f(C_9H_8O_4(aq)) + \Delta G^\circ_f(H_2O(l))]$\)

\($\Delta G^\circ = [-80 , \text{kJ/mol} + (-70 , \text{kJ/mol})] - [-100 , \text{kJ/mol} + (-50 , \text{kJ/mol})]$\)\($\Delta G^\circ = -150 , \text{kJ/mol} + 150 , \text{kJ/mol}$\)

\($\Delta G^\circ = 0 , \text{kJ/mol}$\)

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A BCC unit cell with a lattice constant, a, of 2.4 Å. The volume atomic concentration of the unit cell is 0.0722 atoms/ų.

To determine the volume atomic concentration of a Body-Centered Cubic (BCC) unit cell, we need to consider the number of atoms present in the unit cell and the volume occupied by the unit cell.

In a BCC unit cell, there is one atom located at the center of the cube and eight atoms at the corners, but each corner atom is shared among eight adjacent unit cells. Therefore, the total number of atoms present in the unit cell is 1.

The volume of a BCC unit cell can be calculated using the formula:

Volume = a³

where "a" is the lattice constant.

Given that the lattice constant, a, is 2.4 Å, we can calculate the volume of the unit cell as follows:

Volume = (2.4 Å)³

Converting the units to cubic angstroms:

Volume = 13.824 ų

Now, to determine the volume atomic concentration, we need to divide the number of atoms (1) by the volume of the unit cell:

Volume Atomic Concentration = Number of Atoms / Volume

Volume Atomic Concentration = 1 / 13.824 ų

The volume atomic concentration of the BCC unit cell is approximately 0.0722 atoms/ų.

Therefore, the volume atomic concentration of the unit cell in a BCC crystal with a lattice constant of 2.4 Šis approximately 0.0722 atoms/ų.

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The complete question is:

A BCC unit cell with a lattice constant, a, of 2.4 Å. Determine the volume atomic concentration of the unit cell.

Answer:Halogens

Explanation:

I looked it up lol

Answer: this looks like your homework

Explanation:if you want help you are going to have to ask a specific question instead of giving people your homework.

Answer:

Honestly I would search this up maybe there might be a pdf with the answers. Sorry chemistry isn't my thing:(

Explanation:

Answer:

Explanation:

Titration: titrate twice, the first time with an indicator to determine how much sodium hydroxide is needed to completely react with hydrochloric acid, and the second time without an indicator to prevent the contamination of the sodium chloride salt produced

Answer:

polarizability, less

Explanation:

When any two ions of opposite charge and of different sizes approach each other closely, the cation tries to attracts the outermost electron of other ion and the result is called polarization.

Thus ,the ability of the cation to polarize the nearby anion is known as the  polarizing power of the cation.

It is the measurement of how comfortably or effortlessly the electron cloud gets distorted by an electric field.

The valence electrons of a large size atom is loosely bound and thus they are highly react to the presence of a polar particle or charged particle which lies nearby.

Answer:

C The humidity decreases

Explanation:

So, if the temperature drops so the humidity decreases so the moisture dops from what it was before.

The number of moles of NaF that will be produced from 3moles of Na is 3 moles.

Stoichiometry is the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).

According to this question, sodium reacts with fluorine as follows:

2Na+ F₂ → 2NaF

Based on the above equation, 2 moles of Na will produce 2 moles of NaF

This means that 3 moles of Na will produce 3 moles of NaF.

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Answer:  reverse osmosis.

Explanation:

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The half life of uranium is 10 minutes. Then, the 48 g of uranium sample will decay to 0.21 g after 78 minutes.

Heavy unstable radioactive isotopes undergo nuclear decay by the emission of charged particles. The nuclear decay is a first order reaction.

thus, decay constant k = 1/t ln W0/Wt.

The half life time of the sample = 10 minute.

decay constant = 0.693/ t1/2

k = 0.693/10 = 0.069 min⁻¹

then,W0 = 48 g

we have to find the amount  Wt.

time of decay t = 78 min

ln 48 g/Wt =  0.069 min⁻¹ × 78 min

Wt = 0.12 g.

Therefore, the mass of uranium sample left after the decay will be 0.12 g.

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