A weak current can be detected by replacing an electric bulb in an electric tester with
(a) a coil wound over a compass needle
(b) none of these
(c) LED
(d) Both (a) and (b)
​

The changes would be seen in the IR spectrum for the product compared to the starting material

The study of the interaction of infrared light with materials by absorption, emission, or reflection is known as infrared spectroscopy (also known as IR spectroscopy or vibrational spectroscopy). Chemical compounds or functional groups in solid, liquid, or gaseous forms are studied and identified using this technique. It may be applied to classify novel materials or locate and authenticate known and unidentified samples. An equipment known as an infrared spectrometer (or spectrophotometer), which generates an infrared spectrum, is used to perform the infrared spectroscopy method or procedure.

An IR spectrum can be shown as a graph with the absorbance (or transmittance) of infrared light on the vertical axis and the wavelength, frequency, or wavenumber on the horizontal axis. Reciprocal centimetres, denoted by the sign cm1, are the most common wavenumber units used in IR spectra. The sign m, which stands for micrometres (formerly known as "microns"), is frequently used to represent IR wavelength units. Micrometres are reciprocally connected to wavenumber. A Fourier transform infrared (FTIR) spectrometer is a typical laboratory apparatus that makes use of this approach.

Learn more about IR spectrum:

https://brainly.com/question/29755360

#SPJ4

There are 1.31 x 1022 bromide ions in 2.00 g of \(MgBr_2\).

For more questions on bromide ions

https://brainly.com/question/29228517

#SPJ8

The radius of the chlorine atom increases when it gains an electron. when a chlorine atom transforms into a chloride ion

Who or what is an electron?

A effectively integrate particle with such an opposite electrical charge is called an electron. In contrast to neutrons and protons electrons are not made up of even smaller building blocks. Each electron has an extremely low mass compared to a neutron or proton and carries one units of negatively charged (1.602 x 10-19 coulomb).

What functions do electrons serve?

Java, HTML, and CSS can all be used to create application software that use the Electron framework. Electron enables you to preserve an unified JavaScript codebase and develop pass applications that run on Windows, OSX, and Linux by incorporating Chromium and Node. js into its binaries.

To know more about electron visit:

https://brainly.com/question/1255220

#SPJ4

The cellular respiration is a chemical reaction carbon dioxide is one of the product, however it is not a reactant. Therefore, Option A is correct.

Cellular respiration is the process by which biological fuels are oxidized in the presence of an inorganic electron acceptor such as oxygen to produce large amounts of energy, which is then used to drive ATP production.

Cellular respiration is the process by which oxygen and glucose are converted into water and carbon dioxide. Water and carbon dioxide are byproducts of the process, and ATP is the energy that is produced.

The chemical process by which organic compounds release energy is known as respiration. Exergonic reactions transform the compounds into new ones. Energy is released during the hydrolysis of adenosine triphosphate (ATP) to adenosine diphosphate (ADP) and phosphoric acid (Pi) (it is an exergonic reaction).

Thus, option A is correct.

To learn more about cellular respiration, follow the link;

https://brainly.com/question/13721588

#SPJ1

The equilibrium partial pressures of CO and CO2 cannot be determined without additional information.

The equilibrium partial pressures of CO and CO2 depend on the specific reaction conditions, such as temperature, volume, and the presence of other gases. In the given question,

it is mentioned that only CO is initially present at a partial pressure of 0.938 atm. However, without information about the reaction conditions and the equilibrium reaction involved, it is not possible to determine the equilibrium partial pressures of CO and CO2.

The equilibrium composition of a gas mixture is determined by the equilibrium constant of the reaction and the stoichiometry of the reaction.

In this case, without knowledge of the equilibrium reaction and its associated equilibrium constant, it is not possible to calculate the equilibrium partial pressures of CO and CO2.

To determine the equilibrium partial pressures, additional information such as the equilibrium constant, temperature, and reaction equation is needed.

These factors play a crucial role in determining the equilibrium concentrations of the gases involved in the reaction.

To know more about "Partial pressures" refer here:

https://brainly.com/question/31196860#

#SPJ11

Answer:

The momentum would send things flying eastward

Explanation:

Since earth is rotating at around a speed of thousand miles per hour you could expect things to fly eastward.

The atomic weight of boron is the weighted average of the masses of its two naturally occurring isotopes, taking into account their relative abundances.

To calculate this, we can use the following formula:

Atomic weight of boron = (mass of boron-10 x abundance of boron-10) + (mass of boron-11 x abundance of boron-11)

Substituting the given values, we get:

Atomic weight of boron = (10.0129 x 0.1978) + (11.00931 x 0.8022)

Atomic weight of boron = 2.00199 + 8.83919

Atomic weight of boron = 10.84118

Therefore, the atomic weight of boron is approximately 10.81.

To know more about Atomic please visit:

https://brainly.com/question/30898688

#SPJ11

A statement best describes the entropy that occurs when two gases are added to the same container: The gases will disperse and mix due to the increase in entropy for both gases.

Entropy is a thermodynamic quantity which measures the energy in a system per unit temperature that cannot be used to do work. Perhaps the most common manifestation of entropy is (following the law of thermodynamics), the entropy of a closed system always increases and under conditions of heat transfer, heat energy moves from the component with a higher temperature to the component with a lower temperature. In a system where the heat is isolated, the entropy only goes in one direction (not a reversible process). It is necessary to measure the entropy of a system to determine that energy cannot be used to do work on thermodynamic processes.

These processes can only be carried out by energy that has been transformed, and when energy is converted into work, it theoretically has a certain maximum efficiency. During the work/effort, entropy will accumulate in the system, which then is dissipated in the form of wasted heat.

In classical thermodynamics, the concept of entropy is defined in the second law of thermodynamics, which states that the entropy of an isolated system always increases or remains constant. Thus, entropy can also be a measure of the tendency of a process, whether the process tends to be "entropy" or will proceed in a certain direction. Entropy also shows that heat energy always flows spontaneously from an area with a higher temperature to an area with a lower temperature.

Thermodynamic entropy has the dimensional energy divided temperature, which has International Units joules per kelvin (J/K).

Learn more about entropy at https://brainly.com/question/13135498.

#SPJ4

Answer: -6 m/s^2

Explanation: The initial velocity (u) of the object is 30 m/s and the final velocity (v) is 0 m/s. The time taken (t) is 5 s.

The acceleration (a) can be calculated using the formula:

a = (v - u) / t

Substituting the values:

a = (0 - 30) / 5

a = -30 / 5

a = -6 m/s^2

Therefore, the object's acceleration is -6 m/s^2 (negative because it is decelerating or slowing down).

For the molecular compound disulfur decafluoride (S2F10), you would multiply "molecules of S2F10" by 1 mole S2F10 ,2. 6.022 × 10^23 molecules SO2

For the molecular compound disulfur decafluoride (S2F10), you would multiply "molecules of S2F10" by 1 mole S2F10 to get the units "moles of S2F10."

Therefore, the answer is:

1 mole S2F10

For the molecular compound sulfur dioxide (SO2), you would multiply "moles of SO2" by 6.022 × 10^23 molecules of SO2 to get the units "molecules of SO2."

Therefore, the answer is:

6.022 × 10^23 molecules SO2

To know more about disulfur decafluoride :

https://brainly.com/question/18079411

#SPJ11

To remove any remaining unreacted inorganic component (from the added separating reagent) in the ether solution, two additional washes were performed after extracting benzoic acid into the aqueous solution as its anionic salt.

Benzoic acid must first be extracted from a mixture by adding NaOH, and then any excess NaOH must be removed in order to continue. Further, to get rid of the excess NaOH in the solution, it is washed with water twice or three times.

To reduce the amount of residue and other impurities in the layers, washing is done. The polar impurities, such as the leftover anionic salt of benzoic acid, tend to migrate to the water when washing, giving you a purer organic layer because ether is non-polar and water is polar.

Find more on benzoic acid at : brainly.com/question/19755712

#SPJ4

Answer and Explanation:

Given that

Length of race = 5km

Maximum speed = 45 yards

Based on the above information,

We transform the yards to kilometer i.e.

1 km = 1093.613 yards

And,  

x = 45 yards

So,

1093.613 × x = 45

x = 45 ÷ 1093.613

x = 0.0411480 km

Where

x = Maximum length for which the maximum speed demonstrated in kilometers is sustained.

So, we concluded that Lamor cannot go for the overall 5km as he maintained till 0.0411 km

The \([OH^-]\) of a \(0. 255 M\) solution of pyridine, \(C_5H_5N\) is \(4.30 * 10^{-10} M\).

The pH of a \(0. 400 M\) solution of aniline, \(C_6H_5NH_2\) is \(9.98.\)

1]  Pyridine \((C_5H_5N)\) is a weak base, and its Kb value is given as \(1.69 * 10^{-9}\). To find the \([OH^-]\) of a \(0.255 M\) solution of pyridine, we can use the following equation:

\(Kb = [OH^-][C_5H_5N]/[C_5H_5NH^+]\)

where \([C_5H_5NH^+]\)represents the concentration of the conjugate acid of pyridine, which is negligible compared to the concentration of pyridine.

Rearranging the equation and plugging in the values, we get:

\([OH^-] = Kb[C_5H_5N] / [C_5H_5NH^+]\\= (1.69 * 10^{-9})(0.255) / 1\\= 4.30 x 10^ {-10} M\)

Therefore, the \([OH^-]\) of the solution is \(4.30 * 10^{-10} M.\)

2] Aniline \((C_6H_5NH_2)\) is also a weak base, and its Kb value is given as \(4.27 * 10^{-10}.\) To find the pH of a  \(0.400 M\) solution of aniline, we can use the following equation:

\(Kb = [OH^-][C_6H_5NH_2]/[C_6H_5NH_3^+]\)

where\([C_6H_5NH_3^+]\)represents the concentration of the conjugate acid of aniline, which is formed when aniline accepts a proton from water.

We can assume that \(x\) moles of aniline react with water to form \(x\) moles of \(C_6H_5NH_3^+\) and \(x\) moles of \(OH^-\). Therefore, the initial concentration of aniline, \([C_6H_5NH_2]\), will decrease by \(x\), while the concentrations of \([C_6H_5NH_3^+]\) and \([OH^-]\) will increase by \(x\). At equilibrium, we can express the concentrations as given follows:

\([C_6H_5NH_2] = 0.400 - x\)

\([C_6H_5NH_3^+] = x\)

\([OH^-] = x\)

The value of \(x\) can be determined using the Kb expression:

\(Kb = [OH^-][C_6H_5NH_2]/[C_6H_5NH_3^+]\\\\x = \sqrt{(Kb[C_6H_5NH_2]/[C_6H_5NH_3^+])} \\= \sqrt{((4.27 * 10^{-10})(0.400) / 1)}\\= 1.04 * 10^{-5} M\)

Therefore, the \([OH^-]\) of the solution is\(1.04 * 10^{-5} M,\) and the pH can be calculated using the expression:

\(pH = 14 - pOH\\= 14 - log([OH^-])\\= 14 - log(1.04 * 10^{-5})\\= 9.98\)

Therefore, the pH of the solution is \(9.98\).

Learn more about pH of a solution at

brainly.com/question/30934747

#SPJ4

The specific exergy of the system is 718 kJ/kg.

Given data:

Mass of Hydrogen (H2) = 3 pounds

Temperature of Hydrogen (H2) = 70 °C

= (70+273.15)

= 343.15 K

Pressure of Hydrogen (H2) = 1.2 MPa

Dead state temperature = 20 °C = (20+273.15) = 293.15 K

Dead state pressure = 101.325 kPa

Properties of hydrogen and water:

Here, we need to calculate the specific exergy of the system by using dead state temperature and pressure.

The specific exergy is defined as the maximum work obtainable when a system is brought to the dead state.

The formula for specific exergy is given as:

Exergy = h - hds

Where,h = specific enthalpy of the system

hds = specific enthalpy of the system at the dead state

We need to first calculate the specific enthalpy of Hydrogen (H2) at 70 °C and 1.2 MPa using the following table:

Hydrogen 70°C, 120k Pa 3162 54.7 4578 11.8

Here, Specific enthalpy of Hydrogen (H2) at 70 °C and 1.2 MPa

(h) = 4578 kJ/kg

Similarly, we need to calculate the specific enthalpy of Hydrogen (H2) at dead state conditions of 20 °C and 101.325 kPa:

Hydrogen 20°C, 101.325 kPa 2650 53.13 3860 11.94

Here,

Specific enthalpy of Hydrogen (H2) at dead state conditions of 20 °C and 101.325 kPa (hds)

= 3860 kJ/kg

Therefore, the specific exergy of the system is:

Exergy = h - hds

Exergy = 4578 - 3860

Exergy = 718 kJ/kg

Therefore, the specific exergy of the system is 718 kJ/kg.

To know more about specific exergy visit:

https://brainly.com/question/13040305

#SPJ11

Unknown concentration in the given concentration cell, consists of identical redox couples at both the anode and cathode with different concentrations, the Nernst equation and the given cell potential can be utilized. The concentration of Pb2+ in the anode compartment can be calculated in units of M.

The Nernst equation relates the cell potential (E) to the concentrations of the redox couples involved in the cell. In this case, the cell consists of Pb(s)|Pb2+(aq, ?)||Pb2+(aq, 0.1 M)|Pb(s),

where the concentration of Pb2+ in the cathode compartment is given as 0.1 M. The unknown concentration of Pb2+ in the anode compartment needs to be determined.

The Nernst equation can be expressed as E = E° - (RT/nF) * ln(Q), where E is the cell potential, E° is the standard cell potential, R is the gas constant, T is the temperature, n is the number of electrons transferred, F is the Faraday constant, and Q is the reaction quotient.

In this case, since the redox couples at the anode and cathode are identical, the standard cell potential (E°) is zero. Therefore, the Nernst equation simplifies to E = - (RT/nF) * ln(Q).

By plugging in the given values, including the known concentration of Pb2+ in the cathode compartment (0.1 M) and the cell potential (0.028 V), the unknown concentration of Pb2+ in the anode compartment can be calculated using the Nernst equation.

Using this approach, the unknown concentration of Pb2+ in the anode compartment of the concentration cell can be determined in units of M.

Learn more about cathode compartment here:

https://brainly.com/question/28302432

#SPJ11

24 ml of HCl is produced. when propane is react with chlorine it forms 24 ml of HCl.

Propane, also referred to as liquefied petroleum gas, or LPG, is a gas that is typically compressed and kept in liquid form. It is virtually odorless, harmless, and colorless; an identifying odor is added to make it detectable.

Although propane is frequently used for space and water heating, cooking, and as fuel for engines found in fleet cars, buses, forklifts, and farm irrigation engines, its usage are expanding quickly as a result of new technological advancements.

Propane is referred to as propane autogas when it is utilized as a car fuel.

Therefore, 24 ml of HCl is produced. when propane is react with chlorine it forms 24 ml of HCl.

To learn more about Propane, refer to the link:

https://brainly.com/question/25008296

#SPJ2

Answer:

The temperature of the gas will be 2630 K

Explanation:

Charles's Law consists of the relationship that exists between the volume and the temperature of a certain quantity of ideal gas, which is maintained at a constant pressure, by means of a constant of proportionality that is applied directly. For a given sum of gas at a constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases because the temperature is directly related to the energy of the movement of the gas molecules. .

In summary, Charles's law is a law that says that when the amount of gas and pressure is kept constant, the ratio that exists between the volume and the temperature will always have the same value:

\(\frac{V}{T} =k\)

Assuming that you have a certain volume of gas V1 that is at a temperature T1 at the beginning of the experiment, by varying the volume of gas to a new value V2, then the temperature will change to T2, and it will be fulfilled:

\(\frac{V1}{T1} =\frac{V2}{T2}\)

In this case:

Replacing:

\(\frac{130 L}{4023 K} =\frac{85 L}{T2}\)

Solving:

\(T2=85 L*\frac{4023 K}{130 L}\)

T= 2630 K

The temperature of the gas will be 2630 K

Answer:

The theoretical yield is calculated from the amount of the limiting reactant present.

Explanation:

Some terms to know:

Since the actual yield is based on realistic factors that we cannot control, it cannot be calculated, which gets rid of the first 2 options.

The limiting reactant is the one that affects the reaction, and therefore, it will be the one that determines how much product is produced. Thus, the theoretical yield is calculated from the amount of the limiting reactant present.

Hope this helps!

we are given the pH of the solution as 3.17 are we are required to find the [H₃O+]

we know that :

pH = - log[H₃O+]

-pH = log[H₃O+]

10⁻ᵖᴴ = 10ˡᵒᵍ[ᴴ₃ᴼ⁺]

10⁻ᵖᴴ = [H₃O+]

therefore:

10⁻³.¹⁷ = [H₃O+]

6.8x10⁻⁴ M = [H₃O+]

therefore the [H₃O+] is 6.8x10 minus 4 Molar

The decay of Pb by emitting a β− particle results in the production of Bi. β− decay is a process in which an atomic nucleus emits an electron (β− particle) and transforms into a different nucleus.

In the case of Pb, it undergoes β− decay to become Bi. The equation representing this decay process is:

\(\[^{210}\textrm{Pb} \rightarrow \,^{210}\textrm{Bi} + e^{-}\]\)

In this equation, the superscripts represent the mass numbers of the nuclides, while the subscripts represent their atomic numbers. Pb has a mass number of 210, and during the decay process, it emits a β− particle and transforms into Bi, which also has a mass number of 210. The emitted β− particle carries away excess energy and atomic charge to maintain the balance in the decay process.

Overall, when Pb undergoes β− decay, it transforms into Bi by emitting an electron (β− particle). This process helps stabilize the nucleus and leads to the formation of a new nuclide.

To learn more about atomic nucleus refer:

https://brainly.com/question/20159110

#SPJ11

Taking into account the change of units, the number of picoliters in 6.52×10⁵ mL is 6.52×10¹⁴ picoliters.

In first place, the rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other), the direct rule of three must be applied as follow, being a, b and c known data and x the variable to be calculated:

a ⇒ b

c ⇒ x

So: x= (c×b)÷ a

The direct rule of three is the rule applied in this case where there is a change of units.

The change of units is done by the following rule of three: if 1 mL is equivalent to 1×10⁹ picoliters, 6.52×10⁵ mL is equal to how many picoliters?

1 mL ⇒ 1×10⁹ picoliters

6.52×10⁵ mL ⇒ x

So:

x=(6.52×10⁵ mL×1×10⁹ picoliters)÷ 1 mL

Solving:

x= 6.52×10¹⁴ picoliters

Finally, the volume in picoliters is 6.52×10¹⁴ picoliters.

Learn more about change of units:

brainly.com/question/18427482

#SPJ1

Answer:

The sublimation of iodine at 25.0°C, which is the process of iodine transitioning from solid to gas phase with no liquid phase in between, can be described as an endothermic process. This is because the transition requires the absorption of energy in order to break the intermolecular attractions holding the solid together and to overcome the intermolecular forces holding the gas molecules apart. Therefore, this process absorbs heat from the surrounding environment, which results in a decrease in temperature. This is why solid iodine is often used as a freezing mixture to cool thermally insulated coolers that store food and drinks.

Answer:

55.846 amu

Explanation:

Answer: A. Cytoplasm

Explanation: Cytoplasm is a jelly, like material that fills up the remaining space in the cell. It is also responsible in making the shape of the cell. Without it, other parts of the cells or the organelles cannot make its function because it serves as the hallway of the transportation of the nutrients needed by each cell.

Learn more: https://brainly.ph/question/73078

Answer:

The balloon becomes inflated

Explanation:

The equation of the reaction between baking soda (sodium bicarbonate) and vinegar(ethanoic acid) is shown below;

NaHCO3 + HC2CH3O2 ------> NaC2H3O2 + H2O + CO2

The gas (CO2) evolved in the process leads to the inflation of the balloon dropped on the bottle in which the reaction is taking pace.

This observation provides evidence that a gas was really evolved in the reaction.

Answer:

B

Explanation:

It was the correct answer when I answered it

The part of the wave that the arrow is pointing to is the crest.

Hence we can conclude that the part of the wave that the arrow is pointing to is the crest.

Learn more here: https://brainly.com/question/1959770

A hypothesis that could prove or disprove Janna’s claim is; bottle water is pure water hence it boils at 100°C.

Pure water is water that contains only hydrogen and oxygen and nothing else. Impure water contains other substances apart from hydrogen and oxygen in a ratio of 2:1.

The hypothesis of our experiment is that;" bottle water is pure water hence it boils at 100°C." A hypothesis is a tentative explanation for an observation.

We can carry out the experiment by bringing about three samples of the bottled water and insert a thermometer in each of the samples then record the initial temperature of the water. The samples are then heated to boiling point and the boiling point of each sample is recorded.

If the sample boil at exactly 100°C then the hypothesis is proven or vice versa.

Learn more: https://brainly.com/question/10079361

Therefore, +17 + (-10) = +7 is the effective nuclear charge. Simply counting the number of electrons in the outer shell—without applying any charges—will get the same result. That would be the 3s2 3p5 for Cl, where 2 + 5 = 7.

Use the formula Zeff = Z - S, where Z is the atomic number and S is the number of shielding electrons, to calculate the effective nuclear charge of an atom. By deducting the number of valence electrons from the total number of electrons in the atom or ion, one can calculate the number of shielding electrons. Effective nuclear charge (Zeff) is an atom's net positive charge that attracts an electron. The closest estimate of this net charge is. Effective nuclear charge (Zeff) is calculated as Z minus Zcore.

Learn more about nuclear here-

https://brainly.com/question/28646672

#SPJ4