When aqueous solutions of K2SO4 and Pb(NO3)2 are combined, PbSO4 precipitates. Calculate the mass, in grams, of the PbSO4 produced when 2.5 mL of 0.114 M Pb(NO3)2 and 4.5 mL of 0.68 M K2SO4 are mixed. Calculate the mass to 3 significant figures.

The maximum number of 6 AWG THW copper conductors permitted in a one-inch EMT conduit would likely be rounded down to 11 conductors.

The maximum number of 6 AWG THW (Thermoplastic Heat and Water-resistant) copper conductors permitted in a one-inch EMT (Electrical Metallic Tubing) conduit depends on the specific regulations and standards set by local electrical codes and authorities.

To determine the maximum number of 6 AWG THW copper conductors that can be permitted, you would need to calculate the cross-sectional area of the conductors and compare it to 40% of the cross-sectional area of the one-inch EMT conduit.

The cross-sectional area of a 6 AWG conductor is approximately 13.3 square millimeters or 0.0206 square inches. The cross-sectional area of a one-inch EMT conduit is approximately 0.605 square inches.

Assuming a 40% fill ratio, you can calculate the maximum number of 6 AWG THW copper conductors as follows;

Maximum number of conductors = (0.40 × Cross-sectional area of conduit) / Cross-sectional area of one conductor

Maximum number of conductors = (0.40 × 0.605 square inches) / 0.0206 square inches

Maximum number of conductors ≈ 11.8

Therefore, based on these calculations, the maximum number of 6 AWG THW copper conductors permitted in a one-inch EMT conduit would likely be rounded down to 11 conductors.

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Answer:

light babsbabsbab

Explanation:

abbdbabsbabba

"One possibility is that the battle between the virus and your immune system can take as long as two weeks.

It could be the immune system holds the virus at bay,” said Tompkins.

Or, your immune system has to work so hard that after two weeks it’s inflamed and that’s what makes you feel bad.

Answer:

27

Explanation:

base on what u have see in the pictorial.

The volume of the liquid in the graduated cylinder shown below is 28 milliliters.

The graduated cylinder is also known as the measuring cylinder which is used to measure the volume of the liquids to perform the experiments in the laboratory as the quantity varies of everything for experiments.

The marks written on it show us the amount of liquid filled in the milliliters they can be from 10 milliliters to 50 milliliters made up of glass but sometimes made up of fiber too and the marks give the amount of liquid.

Therefore, the volume of the liquid in the graduated cylinder shown below is 28 milliliters.

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The largest mass that a water molecule can have is 24 amu.

Isotopes are those atoms of an element with the same atomic number but different atomic mass. Isotopes can be stable and unstable or radioisotopes.

The oxygen isotope has a molecular mass of 18 AMU and the isotope of hydrogen will be tritium which will have a molecular mass of 3 amu.

The water molecule has two hydrogens and one oxygen, So to calculate the largest mass that a water molecule could have using other isotopes will be;

(2 X 3) + 18 = 24 amu.

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Option D : Strong bonds in reactant molecules

The strong bonds in reactant molecules sometimes needs extra energy to weaken the bond and proceed the reaction. Hence, option D is correct.

The rate of a reaction is the rate of decrease in concentration of the reactants or decrease in concentration of the reactants or increase in the concentration of the products.

The minimum energy required to overcome the barrier potential of a reaction is called its activation energy. Hence, lower the activation energy higher will be the reaction rate.

High temperature and presence of catalyst also leads to higher rate. Strong bonds in reactants needs higher energy to weaken the intermolecular force. Thus, slower the reaction rate.

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Answer:

\(\frac{140}{57}La -------->\frac{140}{58} Ce +\frac{0}{-1} \beta\)

Explanation:

Beta emission occurs when a neutron is converted to a proton, an electron and a neutrino. This phenomenon reduces the neutron-proton ratio(N/P).

When a beta emission occurs, the mass number of the daughter nucleus is the same as that of the parent nucleus while the atomic number of the daughter nucleus increases by one unit.

We can see this explanation above in the reaction described in the answer section.

No, it does not pass the "fat pencil" test. Therefore, a normal distribution is not a reasonable model. Option B is the correct answer.

The "fat pencil" test is a quick visual check to determine if a dataset can be reasonably approximated by a normal distribution. In this case, the pH readings of wastewater show a significant deviation from a normal distribution. The presence of several low pH values (1.0) and a few high pH values (10.0, 10.5, 11.4) indicate a non-normal distribution with skewness and potential outliers. Therefore, it is not reasonable to model these data using a normal distribution.

Option B is the correct answer.

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Answer:

I'm pretty sure the answer is B.

Explanation:

I hope this helps

Isotopes are different from one another as they have  different numbers of neutrons.

Isotopes are defined as substances having same number of protons but different number of neutrons.Number of protons is characteristic for determining position of elements in the periodic table.

Since,all isotopes have the same number of protons and hence have same position.They have similar chemical properties as they have same number of electrons.

They find applications in the field of nuclear medicine and oil and gas research . There are 2 types of isotopes : stable and unstable

Unstable isotopes are radioactive and are called as radioisotopes.Some of these isotopes are man -made and hence also called as artificial isotopes.Every element has an isotope which is either man-made or natural .

Many properties of isotopes depend on mass which is measured in atomic mass unit. The difference in actual mass and mass number is called mass defect.

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Answer:

6.7%

Explanation:

The formula of the compound is given as:

        C₆ H₁₂  O₆

The problem here is to find the percent composition of hydrogen.

First;

Find the molar mass of C₆ H₁₂  O₆  = 6(12) + 12(1) + 6(16)  = 180g/mol

Secondly;

Percentage composition of H = \(\frac{molar mass of H}{Molar mass of compound}\)  x 100

Percentage composition of H = \(\frac{12(1)}{180}\) x 100  = 6.7%

Answer:

A change in color often occurs during a chemical change

Answer:I found out that it is c

Explanation:Find an answer to your question Determine the amplitude or period as requested. Period of y = 4sin 1/3x a. 4 b. Pi/4 c. 4pi/3 d. 6pi.

Answer:

Explanation:

Here, we want to spell out the names of the elements present in the compound

There are three elements in the given compound

We have Mg, O and H

The names can be obtained from the periodic table of element

We have;

Mg - Magnesium

O - Oxygen

H- Hydrogen

Taking into account the definition of Avogadro's Number, 4.83×10²⁴ atoms of He are in 32.10 g of He.

The molar mass of substance is a property defined as the amount of mass that a substance contains in one mole.

Avogadro's Number is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole.

Its value is 6.023×10²³ particles per mole.

The molar mass of He is 4 g/mole. You can apply the following rule of three: If by definition of molar mass 4 grams of He are contained in 1 mole of He, 32.10 grams of He are contained in how many moles?

moles= (32.10 grams × 1 mole)÷ 4 grams

moles= 8.025 moles

The amount of moles of He in 32.19 grams is 8.025 moles.

You can apply the following rule of three: If by definition of Avogadro's Number 1 mole of He contains 6.023×10²³ atoms, 8.025 moles of He contains how many atoms?

amount of atoms of He= (8.025 moles × 6.023×10²³ atoms)÷ 1 mole

amount of atoms of He= 4.83×10²⁴ atoms

Finally, 4.83×10²⁴ atoms of He are present.

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No, the resulting aqueous solution will be slightly basic due to the partial dissociation of acetic acid.

Equimolar measures of NaOH and HC2H3O2 (acidic corrosive) in fluid arrangement won't bring about an impartial arrangement, yet rather a somewhat essential arrangement.

This is on the grounds that acidic corrosive is a feeble corrosive and doesn't totally separate in that frame of mind, there will in any case be some undissociated corrosive present even after it responds with NaOH to shape the acetic acid derivation particle and water.The response among NaOH and HC2H3O2 can be addressed as follows:

NaOH + HC2H3O2 → NaC2H3O2 + H2O

Since NaOH is areas of strength for a, it will totally separate in answer for structure Na+ and Goodness particles. The acetic acid derivation particle (C2H3O2-) shaped in the response with acidic corrosive is the form base of acidic corrosive and is a feeble base. It will to some degree separate in answer for structure H+ and C2H3O2-particles.

Consequently, the subsequent arrangement will have a marginally essential pH because of the overabundance Goodness particles from the NaOH responding with the to some degree separated acetic acid derivation particles.

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Answer:

4.2 g good luck with the answer

Answer:

When oil and lye are combined and heated, the result is soap. This chemical reaction is called saponification. Without lye, saponification isn’t possible, so lye is necessary to create soap.

Gas laws are the relation between pressure, volume, and temperature of the gas. The relation between the pressure and the volume of the gas is given by Boyle's law.

Boyle's law gives the relation between the pressure and the volume of the gas and states that the pressure is in the inverse relationship with the volume of the gas.

When the pressure of the gas is increased the volume of the gas decreases, similarly the decreased pressure of gas results in an increased volume of gas.

Boyle's law is given as,

\(\rm V = \rm constant (\dfrac{1}{P})\)

and,

\(\rm P_{1}V_{1} = \rm P_{2}V_{2}\)

Boyle's law is only true if the moles of the gas (n) and the temperature (T) of the gaseous system are constant.

Therefore, pressure and volume are in indirect relation and the moles and the temperature are constant in Boyle's law.

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Answer: Mg is a cation and Cl is an anion

Explanation: In more detail, if you look at the periodic table, the group number (or columns) of the elements, describe how many valence electrons, or how many electrons the element has available to have a complete an electron shell. Magnesium being in group 2, it has one 2 electrons that will be "donated" to an anion that it bonds with. However, Chlorine being in group 17, (look at the single digit number for double digit groups), it has 7 valence electrons. Knowing that a full electron shell is usually 8 electrons, it needs only one. Since Magnesium has 2 valence electrons to give away, two atoms of Chlorine gas will then bind to the Magnesium, where the 2 Chlorine atoms will take the electrons to fill their shells. Magnesium Chloride, in terms of charges when in ions, [Mg]2+ and 2 [Cl]-1

Magnesium chloride is formed when magnesium ion formed from the loss of two electrons and two chloride ions formed by accepting one electron each are held together by electrostatic attractive forces.

Magnesium chloride is an ionic compound which consists of magnesium ions and chloride ions.

Therefore, magnesium chloride is formed when magnesium ion formed from the loss of two electrons and two chloride ions formed by accepting one electron each are held together by electrostatic attractive forces.

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Answer:

sec    explanation:    It is because it goes by order sec, min, day, month, and year etc

Answer:

sec

Explanation:

Answer:

6,570,000

Rounded to 3 significant figures. The figures therefore are 6, 5, 7

Answer:

Vitamin B12

Explanation:

Answer: B12

Explanation: Took the test

The question is missing. Here is the complete question.

One light beam has wavelength, \(\lambda_{1}\), and frequency, f₁. Another light beam has wavelength, \(\lambda_{2}\), and frequency, f₂. Write a proportion that shows how the ratio of the wavelengths of these two light beams is related to the ratio of the frequencies.

Answer: \(\frac{f_{1}}{f_{2}} =\frac{\lambda_{2}}{\lambda_{1}}\)

Explanation: In vacuum, eletromagnetic waves travels at a constant speed called "speed of light", whose symbol is [c] and magnitude is 3x10⁸m/s.

Speed of light, frequency and wavelength are related by the formula:

\(c=\lambda.f\)

So, if one light beam has wavelength and frequency, \(\lambda_{1}\) and f₁, respectively, the second beam has wavelength \(\lambda_{2}\) and frequency f₂ and both travel at speed of light:

\(\lambda_{1}f_{1}=\lambda_{2}f_{2}\)

\(\frac{f_{1}}{f_{2}}=\frac{\lambda_{2}}{\lambda_{1}}\)

Then, the ratio that shows the relation between frequencies and wavelengths of these light beams is \(\frac{f_{1}}{f_{2}}=\frac{\lambda_{2}}{\lambda_{1}}\)

The third law of thermodynamics describes the entropy of a: solid.

The third law of thermodynamics states that the entropy of a pure crystalline substance approaches zero as the temperature approaches absolute zero (0 Kelvin or -273.15 degrees Celsius). This law implies that at absolute zero, a perfectly ordered and pure crystalline solid will have zero entropy.

The third law of thermodynamics is not specific to liquids or gases but applies to solids. In a solid, the molecules are highly ordered and have fixed positions in a regular lattice structure. As the temperature decreases towards absolute zero, the thermal motion of the molecules reduces, and the system becomes more ordered, resulting in a decrease in entropy.

In contrast, liquids and gases have higher entropy compared to solids at absolute zero because their molecules have more freedom of movement and are not as tightly arranged. Therefore, the third law of thermodynamics specifically addresses the entropy of solids and does not apply to liquids or gases.

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Calcium nitrate tetrahydrate is written as Ca(NO3)2.4H2O, which means that it contains one mole of calcium nitrate (Ca(NO3)2) and four moles of water (4H2O).

Since we know that the compound contains 0.44 moles of calcium nitrate, we can use the coefficient of the water in the chemical formula to find out how many moles of water the compound contains. The coefficient of water in the chemical formula is 4, so we can use it to calculate the number of moles of water in the compound:

0.44 moles of calcium nitrate x 4 moles of water/1 mole of calcium nitrate = 1.76 moles of water.

So the compound contains 1.76 moles of water.

To get the bottom of the meniscus to the volumetric line of the pipette, tilt the pipette slowly and gently while keeping the top of the meniscus level. Make certain that you are gazing at the meniscus at eye level. Finally, add or subtract liquid as needed until the bottom of the meniscus reaches the volumetric line.

Follow these steps to get the bottom of the meniscus to the volumetric line of the pipette:

Fill the pipette with the liquid to be measured by dipping the tip of the pipette in the liquid and bringing it up to the required volume.

Hold the pipette upright and gently pour the liquid out until the meniscus (the curved surface of the liquid) is slightly above the pipette's calibration point.

To adjust the meniscus, use a clean and dry dropper to add or withdraw tiny drops of liquid from the pipette until the meniscus's bottom is at the pipette's calibration mark.

To maintain precision, hold the pipette upright during this operation and add or withdraw the liquid drop by drop.

Once the meniscus has reached the calibration point, you can transfer the liquid to the container of your choice or take any necessary measurements.

When correcting the meniscus, precision is essential since even little deviations might lead to erroneous results. It is also critical to use the correct pipette for the liquid being measured and to follow any special instructions or protocols supplied by your laboratory or project.

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The 18th and 19th century research in gases led to the acceptance of the kinetic-molecular theory of gases.

The kinetic-molecular theory of gases is a scientific principle that describes the behavior of gases at the molecular level. It was developed during the 18th and 19th centuries based on experimental observations and mathematical models. The theory states that:

Gases consist of tiny particles, such as atoms or molecules, that are in constant motion.

The particles are in constant collision with each other and with the walls of the container in which they are contained.

The average speed of the particles is directly proportional to the Kelvin temperature of the gas.

The pressure of a gas is directly proportional to the number of particles in the gas and to the average kinetic energy of the particles.

The kinetic-molecular theory of gases provided a more accurate and detailed explanation of the behavior of gases than the previous empirical models. It laid the foundation for the development of modern chemistry and physics and continues to be an important concept in these fields today.  

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Answer:

mass number = 3

Explanation:

Hydrogen is the only chemical species that has an isotope with 2 neutrons. Since all hydrogen atoms only have 1 proton, the mass number of hydrogen isotope with 2 nuetrons would be 3. The mass number is equal to number of protons + neutrons (+ electrons but they have virtually no mass so they can be excluded).

Answer:

b

Explanation:

Answer:

Explanation:

because when in molten form ions are Mobil (free) to move and can carry a charge however when in solid  ions are fixed in position so they can't move and carry a charge.