Reddish-brown color


don’t need a magnifying glass to see grains


gritty when dry


sticks to my fingers when wet


doesn’t smell like anything


dries quickly


does not get foamy with vinegar


damp soil made a ball but it fell apart quickly


What type of soil

The solubility product (Ksp) of the salt given in question is 1.6x10^-9.

What is solubility product?

The equilibrium constant for a solid material dissolving in an aqueous solution is the solubility product constant, Ksp. It stands for the degree of solute dissolution in solution. A substance's Ksp value increases with how soluble it is.

Suppose we have reaction:

aA(s)↽⇀cC(aq)+dD(aq)

So, the formula to determine solubility product will be:

\(K_{sp} = [C]^c[D]^d\)

Let S mol/L be the solubility of salt. So,

\(S = [BaSo_4] = [Ba^{2+}] = [So_4^{2-}]\)

\(S = 4.0\times10^{-5}\)

we know that,

\(K_{sp} = [C]^c[D]^d = S\times S\)

\(K_sp = (4.0\times10^{-5}) \times (4.0\times10^{-5})\)

\(K_sp = 1.6 \times 10^{-9}\)

Hence, the solubility product is \(1.6 \times 10^{-9}\).

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The final temperature of the water is 33.02°C.

Here's the solution:

Initial temperature of water (T1) = 30°C

Mass of water (m) = 2300g

Specific heat capacity of water (c) = 4.184 J/g°C

Heat released by the reaction (q) = 9.66 * 10^3 J

Final temperature of water (T2) = (T1 + q/mc)

= (30°C + 9.66 * 10^3 J / 2300g * 4.184 J/g°C)

= 33.02°C

The heat released by the reaction is absorbed by the water, causing the temperature of the water to increase.

The final temperature of the water is calculated by adding the heat released by the reaction to the initial temperature of the water and dividing by the mass of the water and the specific heat capacity of water.

Thus, the final temperature of the water is 33.02°C.

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Answer:

The correct options are;

1. 1,600

2. 100 Watts

A 23-30 watt CFL provides 1,600 lumens and is equivalent to a 100 Watts incandescent bulb

Explanation:

Brightness is measured in lumens and watts measure energy usage therefore with the use of an energy saving light bulb, the same lumination can be obtained at a lower energy usage.

According to a comparison chart for LED Lights vs. Incandescent Light Bulbs vs. Compact Fluorescents (CFLs) from USAI lightening website 23-30 watts CFL has a light output of 1,600 and is therefore produces enough light as a 100 Watts Incandescent Light Bulb

Also according to energy.gov website, CFLs save up to 75% energy such that a 23-30 watt CFL can produce the same illumination as a 100 watt incandescent bulb

Therefore we have, a 23-30 watt CFL provides 1,600 lumens and is equivalent to a 100 Watts incandescent bulb.

Answer:

1600 lumens, 100 watt incandescent

Explanation:

100% on edge (:

Answer:

The formula for selenic acid is H2SeO4.

Explanation:

Selenic acid is an oxoacid of selenium, which means that it contains selenium and oxygen atoms bonded together in a compound that also contains hydrogen atoms. The selenate ion, which has the formula SeO42-, is an ion that contains selenium and oxygen atoms bonded together. Based on these facts, we can predict that the formula for selenic acid will contain selenium, oxygen, and hydrogen atoms.

To determine the specific ratio of atoms in the formula for selenic acid, we can look at the valences of the elements involved. The valence of an element is the number of bonds it can form with other atoms. Selenium has a valence of 6, oxygen has a valence of 2, and hydrogen has a valence of 1.

Since selenium has a valence of 6, it can bond with 6 oxygen atoms. This means that selenic acid will contain at least one selenium atom bonded to 6 oxygen atoms. In addition, selenic acid will contain hydrogen atoms, which can bond with oxygen atoms. Based on these considerations, we can predict that the formula for selenic acid will be H2SeO4, which contains one selenium atom bonded to 6 oxygen atoms and 2 hydrogen atoms.

Pure silicon's electrical conductivity is solely dependent on thermally produced carriers. Intrinsic Silicon is the name for silicon that is chemically pure. It is a crucial component of semiconductors.

Silicon is a crucial component of semiconductors. Group IV materials include silicon. Four of its valence electrons are maintained in its outer orbit by covalent interactions with the valence electrons of four nearby silicon atoms. These valence electrons cannot be used to generate electricity. Therefore, intrinsic silicon acts like an insulator at O degrees. Some valence electrons dissociate from covalent bonds as a result of thermal energy when the temperature rises. It is referred to be a hole that results from a free electron remaining in the bond and acts as a semiconductors.

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Answer:

Test for carbon dioxide gas.

The reaction between baking soda and citric acid will form sodium ions, citric acid ions, carbon dioxide gas, and water. So all you have to do is add the gas produced (by gas displacement method or something) and test whether the gas is carbon dioxide, with lime water or other methods like hydrogencarbonate indicator. Hope this helped!

Explanation:

Answer:

depends on amount, but the reaction's endothermic (meaning its cold, absorbs heat from surroundings)

I hope it helps.

Answer:

1120 mm Hg

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Answer:Displacement method

Explanation:

Answer:

The first answer is: Because the rock is irregularly shaped, you used the displacement  method to measure its volume.

The second answer is: You used calculations  to indirectly find the density  of the objects.

Vapor density is defined as the amount of weight of a gas or vapor in comparison to air.

The relative weight of a gas or vapor in comparison to air, which has an arbitrary value of one, is defined as vapor density. If a gas's vapor density is less than one, it will rise in air. When the vapor density exceeds one, the gas will normally sink in air.

Vapor density is only a broad concept used to estimate where vapors might be discovered when released. This physical parameter, however, is not absolute and can be influenced by:

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Answer:

boron is a non-metal and aluminium is metal. Hence, boron is a bad conductor of electricity whereas aluminium is a good conductor of electricity. Also, aluminium is more reactive as compared to boron.

Explanation:

if you want you can make me the brainliest

1.025 moles of NaCl are present in a solution with a molarity of 8.20M and 125 mL of solution. Details about molarity can be found below.

The number of moles of a solution can be calculated by multiplying the molarity of the solution by its volume. That is;

no of moles = molarity × volume

According to this question, a solution has a molarity of 8.20M and volume of 125 mL of solution.

no of moles = 8.20 × 0.125

no of moles = 1.025moles

Therefore, 1.025 moles of NaCl are present in a solution with a molarity of 8.20M and 125 mL of solution.

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Answer: Helium has the smallest radius.

Explanation: Helium has the smallest atomic radius. Due to nuclear charges and stuff ect-

Answer:

A.      

sorry if  it's wrong

Explanation:

In an electrolytic cell, nitrate ions (NO3^2-) being anions, do migrate to the anode. However, you would expect water (H2O) to be oxidized at the anode instead of nitrate ions because of the oxidation state of nitrogen in the nitrate ion.

In an electrolytic cell, the anode is the electrode where oxidation occurs. When nitrate ions (NO3^2-) migrate to the anode, they cannot be oxidized because they are already in their highest possible oxidation state (-1 for each oxygen atom and -3 for nitrogen atom).

This means that the nitrate ions are already fully oxidized and cannot undergo further oxidation at the anode. Instead, water (H2O) molecules are more likely to be oxidized at the anode.

This is because water molecules can be oxidized to form oxygen gas (O2) and hydrogen ions (H+), which are both able to participate in further reactions within the cell.

Additionally, water molecules have a lower oxidation state than nitrate ions, which makes them more susceptible to being oxidized. Therefore, it is expected that water rather than nitrate ions will be oxidized at the anode in an electrolytic cell.

Nitrogen in the nitrate ion has an oxidation state of +5, which is already its maximum possible oxidation state. Since it cannot be further oxidized, water molecules present in the solution will be preferentially oxidized at the anode, producing oxygen gas and releasing H+ ions.

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Hi there!

To find the mole fraction for the remaining compound (Carbon monoxide), we must remember that mole fractions add up to ONE.

We can subtract the mole fractions of all of the other gases from one to solve for the mole fraction of carbon monoxide.

1 - 0.164 - 0.278 - 0.455 - 0.101 = 0.002

Base pairing refers to the formation of hydrogen bonds between complementary nucleotides in a DNA molecule. In DNA, adenine (A) and thymine (T) are complementary bases that form two hydrogen bonds between them.

These hydrogen bonds are formed between the hydrogen atom attached to the nitrogen atom in adenine and the oxygen atom attached to the carbon atom in thymine, and between the hydrogen atom attached to the nitrogen atom in thymine and the oxygen atom attached to the carbon atom in adenine.

In addition to these hydrogen bonds involved in base pairing, there are other positions in A and T that have the potential to form hydrogen bonds. These positions are indicated with a star in the following diagram:

A: H-N*H-C=N-C*H-O-H
 |  |     |    |
 H-C*H    H-C*H-H
 |  |     |    |
 H-C*H    H-C*H-H
 |  |     |    |
 H-O*H-C-N-C*H-O-H

T: H-O*H-C-N-C*H-O-H
 |  |     |    |
 H-C*H    H-C*H-H
 |  |     |    |
 H-C*H    H-N*H-C=O
 |  |     |    |
 H-O*H-C-N-C*H-O-H

The positions indicated with a star have the potential to form hydrogen bonds because they have either a hydrogen atom attached to a nitrogen or oxygen atom, or an oxygen atom attached to a carbon atom. These positions can form hydrogen bonds with other complementary nucleotides or with other molecules in the DNA molecule.

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Answer:

the water is not warm enough for her

Explanation:

Given that

Her preferred temperature = 82°F

Thermometer in water reads = 24°C

Convert the preferred temperature to °C

°C=5/9 (82-32)

°C = 27.8 °C

Hence the water is not warm enough for her

The water is not warm enough for her to swim in.

We have to convert Emma's preferred temperature to °C

°C=  5/9 x (F - 32)

°C=5/9 (82-32)

°C = 27.8

Therefore the temperature is 27.8°C

This means that the temperature of the water is not warm enough for her

to swim in.

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Copper is a soft, ductile, and malleable metal that bends and stretches easily without breaking. Copper is a versatile metal for construction and manufacturing because of this.

The movement of the continental plates is due to convection currents located at the Earth's mantle below the crust.

In conclusion, the movement of the continental plates is due to convection currents located at the Earth's mantle below the crust.

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Answer:

See below.

Explanation:

A dynamic equilibrium in chemistry refers to a situation in which the reaction of reactants to form product(s) in which the products can reverse the reaction by falling apart and back to the reactants.  Reactions that go to completion are irreversible.  In cases where reactants form products (in a forward reaction), but the products can change back into reactants (in a reverse reaction) are called reversible.

An example is the reaction of carbon dioxide with water to form carbonic acid (think soft drinks).

     CO2(g)+H2O(l) ⇌ H2CO3(aq)

As anyone who has opened a warm can of soda knows, it can erupt suddenly and spray anyone nearby with a shower of bubbly, and sticky, soda.  Carbonic acid is unstable and will happily decompose back to it's reactant molecules if given the chance.

Experience tells us what to expect when giving a brother or sister a can of warm soda that you've shaken hard for a minute.  But if you are a chemist, such responses aren't always easy to predict with a new reaction.  Equilibrium constants were developed to provide a means for presdicting the exstent of these reactions.  They are used in equilibrium equations to predict the concentrations of products and reactants, given conditions of temperature and pressure, under defined conditions of temperature and pressure.

The equations themselves include concentrations as the key input.  In the carbonic acid example, if one were to add excessive amounts of one of the reactants, one would expect the equilibrium to "shift to the right."  This simply means that more carbonic acid would be made.  The chances of the forward reaction increase as concentration increases.  The amount of CO2 given off as a gas depends on the concentration of the CO2 in the gas phase, which is given by the partial pressure of the gas.

The space above the soda and the cap represents one place that the CO2(g) can escape the solution.  The CO2 pressure in the gas phase is a measure of it's concentration.  An equilbium calculation takes this concentration in account when decidng how much much of each component is present.  Other compouns that are present may also impact the equilibrium since they may interfere with one of the reaction steps.  Pressure and emperature either dirctly impact the concentration (e.g., gases) or they affect the "effective" concentrations of the compunds.  A higher temperature creates more collisons between reactant molucules that may change the equilibrium constant..

Answer:16

Explanation:

Answer:

violet

Explanation:

Answer:

Explanation:

The combining capacity of an atom is its ability to make bonds with other elements. It is also known as valency or valence. The number of valence electrons of an atom gives us an idea of the combining capacity. Some atoms like to donate or gain electrons, while others share them to combine with another atom.

This is because of the variation in lone pairs CH4 has no lone pair [Tetrahedral], NH3 has 1 lone pair[Pyramidal], H2O has 2 lone pair[Bent].

A complex molecule's or ion's bond angle is the angle between both the two bonds, or the angle between two orbitals that contain bonding electron pairs surrounding the central atom. It is computed using a spectroscopic approach and expressed in degrees.

There are several common aspects to take into account, including the size of the involved atoms, the presence of lone pairs, numerous bonds, big groups connected to the core atom, and the environment the molecule is situated in.

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The energy of the ground state of a He+ ion can be calculated using the formula:
the energy of the ground state of a He+ ion is lower than that of a hydrogen atom. The energy of the ground state is an important property of an atom or ion, as it determines the chemical and physical properties of the element.

Energy of He+ ion = Energy of H atom / (Z²)

where Z is the atomic number of He+, which is 2. Substituting the values, we get:

Energy of He+ ion = -13.6 eV / (2²) = -3.4 eV

Therefore, the energy of the ground state of a He+ ion is -3.4 eV.

The ground state energy of a hydrogen atom is -13.6 eV, which is the energy required to remove the electron from the atom completely. To calculate the energy of the ground state of a He+ ion, we use the formula Energy of He+ ion = Energy of H atom / (Z²), where Z is the atomic number of He+. Substituting the values, we get the energy of the He+ ion's ground state as -3.4 eV. This means that the He+ ion requires less energy to remove its electron compared to the hydrogen atom due to the higher nuclear charge of the He+ ion.

The energy of the ground state of a He+ ion is -3.4 eV, which is lower than the energy of the ground state of a hydrogen atom. This is because the He+ ion has a higher nuclear charge than hydrogen, which attracts the electron more strongly and requires less energy to remove it.

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Answer:

20KJ

Explanation:

We know that heat required to raise the temperature of substance is given by

thermal energy Q= mass(m) × specific heat capacity(c) × change in temperature.(ΔT)

Q = mcΔT

given data: mass m = 2kg , c = 2000j/Kg°C and ΔT = 120-20 =100°C

Therefore, Q = 2×2000×100 = 20000 J = 20KJ

Hence, 20KJ heat is required to to heat 2 kg of cooking oil with a specific heat capacity of 2000 from 20 to 120 [ Units have been assumed as per convenience)

Answer: Cr2(SO4)3 its this

Explanation:

Answer:

289.8g

Explanation:

Using the formula as follows:

mole = mass/molar mass

Molar mass of SnF = 119 + 19

= 138g/mol

Using mole = mass/molar mass

2.1 = mass/138

mass = 2.1 × 138

mass = 289.8g

Meiosis occurs during spore formation within the sporangia of the fern's sporophyte generation.

A student can identify when meiosis occurs in the life cycle of a fern by observing key stages in the fern's life cycle. The fern life cycle alternates between two distinct generations: the sporophyte and the gametophyte.

The sporophyte generation is the dominant phase and can be identified as the visible fern plant that we commonly recognize. It produces sporangia on the undersides of its fronds.

Inside these sporangia, diploid (2n) cells called sporocytes undergo meiosis. Meiosis is the process by which these sporocytes divide and produce haploid (n) spores.

The spores are released from the sporangia and dispersed by wind or water. They germinate and develop into the gametophyte generation, which is usually small and inconspicuous.

The gametophyte produces both male and female reproductive structures called gametangia. Within the gametangia, specialized cells called gametes are produced through mitosis.

When the conditions are favorable, the gametes are released and can fuse to form a zygote. This process is known as fertilization and restores the diploid condition. The zygote develops into a new sporophyte, completing the fern life cycle.

Therefore, a student can identify when meiosis occurs in the fern life cycle by observing the production of spores within the sporangia of the sporophyte generation.

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