What is the minimum volume (mL) of 4.00 M KOH required for the reaction below to go to completion (only products present at the end of the reaction) if 1.1798 g of aluminum foil is used?

2 Al(s) + 2 KOH(aq) + 6 H2O(l) → 2 KAl(OH)4(aq) + 3 H2(g)

8 hours  is the half-life of the radioactive iodine. The entire body is exposed to radiation risks from gamma rays. They can swiftly get through defences that alpha and beta particles can stop.

Like skin and clothing. Because of their powerful penetrating power, gamma rays may require several inches of a heavy substance, like lead, or even several feet of concrete, to be stopped. During radioactive decay, an atom's nucleus may emit gamma rays. They can easily penetrate the human body and travel tens of yards or more through the air. It takes a radioactive heavy, dense material, such several inches of lead or concrete, to shield this particularly penetrating form of ionising radiation.

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Answer:

Here's what I find  

Explanation:

Sodium vapour produces mostly yellow light.

Mercury vapour produces mostly blue light.

A white car reflects all colours back to our eyes.

A coloured car, say green, absorbs all the other colours and reflects the green.

Under a sodium light, a white or a yellow car will appear yellow. A red car will be nearly black because there is no red light to reflect.

Under a mercury light, a white or a blue car will appear blue. A yellow car will be quite dark, but there will be a yellowish tinge because there is some yellow in the Hg spectrum for it to reflect.  

The picture below shows a red car and a black car under sodium light. Can you tell which is which?

Answer:

I think it's lipid but if it's not it's dna

Explanation:

The other answer say carb and someone said it's wrong i picked amino acid on my test and it was wrong.

The properties of a natural resource that make it useful for humans as a material or energy source is the ability to convert mass into energy and vice versa.

The expression natural resources make reference to all types of matter and energy extracted from nature that can be used to produce goods and services.

Some examples of natural resources include for example irreversible resources such as fossil fuels (i.e., oil, or coal, gas, minerals such as metals, rocks, etc) as well as those based on the use of reversible energy such as eolic air energy, solar radiation or sunlight, soil and hydric resources or water.

Therefore, with this data, we can see that natural resources can be defined as any material and or energy obtained from nature that may be irreversible or reversibly used to produce goods and services.

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The energy in joules of one mole of photons of visible light having a wavelength of 4.11×10^2 nm? can be expressed as 2.9*10^5 J

From the question we were told to find the energy and the parameters that is needed to calculate these are;

c=3*10^8

h= 6.626 * 10^-34 J.s

1 mol photons = 6.023x10^23 photon

λ = 4.11×10^2 nm  = 4.11 × 10-7 meters

The parameters can be input  as Energy of one mole photon (E) = ( 6.023x10^23 * 6.626 * 10^-34 * 3*10^8)/ (4.11 × 10^-7)

=291302

=2.9*10^5 J

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When answering questions on the Brainly platform, it is important to always be factually accurate, professional, and friendly. Conciseness is also key, as providing extraneous amounts of detail can make it difficult for the user to understand the answer. It is also important to not ignore any typos or irrelevant parts of the question, as they may be important to understanding the problem at hand

.When given the solubility of calcium sulfate at a given temperature, we can calculate the Ksp using the following formula:CaSO4(s) ↔ Ca2+(aq) + SO42-(aq)Ksp = [Ca2+][SO42-]The solubility of calcium sulfate is given as 0.047 g/100 ml. To convert this to moles per liter (M), we need to divide by the molar mass of CaSO4:0.047 g/100 ml ÷ 136.14 g/mol = 3.45 x 10^-4 MWe can assume that the concentration of Ca2+ and SO42- ions will also be 3.45 x 10^-4 M, since the stoichiometric coefficients for these ions are both 1. Plugging these values into the Ksp formula gives:Ksp = (3.45 x 10^-4)^2 = 1.19 x 10^-7Taking the negative log of the Ksp value gives:pKsp = -log(Ksp) = -log(1.19 x 10^-7) = 6.92 (to two decimal places)Therefore, the pKsp value for calcium sulfate at this temperature is 6.92.

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Answer:

1. a part of the soil that contains decayed plant or animal matter

2. erosion

3. topsoil

Explanation:

Hope this helped :)

Answer:

\(Molar\ solubility=2.14x10^{-4}M\)

\(Ksp=3.91x10^{-11}\)

Explanation:

Hello,

In this case, given that 0.0167 grams of calcium fluoride in 1 L of solution form a saturated one, we can notice it is the solubility, therefore, the molar solubility is computed by using the molar mass of calcium fluoride (78.1 g/mol):

\(Molar\ solubility=\frac{0.0167gCaF_2}{1L}*\frac{1molCaF_2}{78.1gCaF_2} \\\\Molar\ solubility=2.14x10^{-4}M\)

Next, since dissociation equation for calcium fluoride is:

\(CaF_2(s)\rightarrow Ca^{2+}(aq)+2F^-(aq)\)

The equilibrium expression is:

\(Ksp=[Ca^{2+}][F^-]^2\)

We can compute the solubility product by remembering that the concentration of both calcium and fluoride ions equals the molar solubility, thereby:

\(Ksp=(2.14x10^{-4})(2*2.14x10^{-4})^2\\\\Ksp=3.91x10^{-11}\)

Regards.

Answer:

a cluster of sunspots will results in extreme solar flares that can cause mass disruption of electronics on earth.

Answer:

joib

Explanation:

250 L of 5.0% w/v glucose solution can be prepared using 125 g of glucose.

w/v = [ mass of solute (g) / volume of solution (mL) ] × 100

5.0 % w/v = [ 125 g / volume of solution (mL) ] × 100

volume of solution (mL) = [ 125 g / 5.0 % w/v ] x 100

volume of solution (mL) = [ 125 g / (5.0 / 100) ] x 100

volume of solution (mL) = [ 125 g / 0.05 ] x 100

It would require approximately 600 kilojoules of energy to vaporize 2 kg of copper.

To calculate the energy required to vaporize a substance, we need to consider the heat of vaporization, which is the amount of energy required to convert a given amount of substance from its liquid state to its gaseous state at a constant temperature.

The heat of vaporization for copper is approximately 300 kJ/kg (kilojoules per kilogram) at its boiling point, which is around 2567 degrees Celsius (4649 degrees Fahrenheit). This means that for every kilogram of copper, 300 kJ of energy is needed to vaporize it.

Given that you have 2 kg of copper, we can calculate the total energy required as follows:

Energy = Heat of Vaporization × Mass

Energy = 300 kJ/kg × 2 kg

Energy = 600 kJ

Therefore, it would require approximately 600 kilojoules of energy to vaporize 2 kg of copper.

It's worth noting that the heat of vaporization can vary slightly depending on the purity of the copper and the specific conditions, such as temperature and pressure. The value provided here is an approximation. Additionally, it's important to handle copper and any high-temperature processes with caution, as they can pose safety hazards.

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FALSE, the isotope carbon-14 decays to nitrogen-14 over a half-life of 5,730 years. these isotopes could be used to determine the age of rocks formed early in the cenozoic era, approximately 60 million years ago.

Having the chemical symbol C and atomic number 6, carbon is an element with the meaning "coal" in Latin. It is nonmetallic and tetravalent, meaning that four of its atom's electrons may be used to create covalent chemical connections. The periodic table's group 14 is where it belongs. Only 0.025 percent of the crust of the Earth is made up of carbon. The bond sequence affects a bond's strength. Because shorter bonds have a higher bond strength than longer bonds, the higher the bond order, the stronger the bonds are. The bond order of carbon dioxide is 2, that of carbon monoxide is 3, and that of the carbonate ion is 1.33.

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Answer:

thete are 672 seeds in 14 kg

Answer: (Kr) 5s2

Explanation:

Apex

Answer:

the systematic name is called Lithium sulfide.

An inorganic substance composed of the elements lithium (Li) and sulfur (S) is known as lithium sulfide \((Li_2S)\).

It is a substance that solidifies in the shape of a crystal. Lithium ions in lithium sulfide have a positive charge, while sulfide ions have a negative charge. The chemical lithium sulfide is important in many industries. It is often employed in the synthesis of various lithium compounds, the manufacture of lithium batteries, and the manufacture of ceramics. Due to their high energy density, lithium batteries are often employed in portable electronics and electric vehicles.

Lithium sulfide is an ionic compound that has a high melting point in terms of physical characteristics. Although it is insoluble in water, many organic solvents can help dissolve it.

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Answer:

Explanation:

Figure 6. An instant cold pack consists of a bag containing solid ammonium nitrate and a second bag of water. When the bag of water is broken, the pack becomes cold because the dissolution of ammonium nitrate is an endothermic process that removes thermal energy from the water.

There are approximately 1.62 x 10^25 water molecules in the 499.8 mL bottle of water.

To determine the number of water molecules in the given volume of water, we need to use the relationship between mass, volume, and molar mass of water.

First, we need to find the mass of water in the bottle:

Mass = Density * Volume

Mass = 0.967 g/mL * 499.8 mL = 483.9 g

Next, we need to convert the mass of water to moles using the molar mass of water. The molar mass of water (H2O) is approximately 18.015 g/mol.

Moles = Mass / Molar mass

Moles = 483.9 g / 18.015 g/mol = 26.88 mol

Finally, we can calculate the number of water molecules using Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of molecules = Moles * Avogadro's number

Number of molecules = 26.88 mol * (6.022 x 10^23 molecules/mol) = 1.62 x 10^25 molecules

Therefore, there are approximately 1.62 x 10^25 water molecules in the 499.8 mL bottle of water.

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Answer:

is tht wht u want

Explanation:

1 grams Sodium is equal to 0.043497607849056 mole.

Answer:12

Explanation:because it’s 12

The maximum amount of product that can be obtained from given amounts of reactants in a chemical reaction. The correct answer is C.

A chemical reaction is a process that causes one group of chemical components to change chemically into another. Reactants are substances that interact to make new substances, whereas products are those substances that result from the interaction.

Chemical Reaction Types

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The relationship between KMT and sea level rise is 760 nm as the sea level rises because the gas level is increasing.

KMT is described as the behavior of gases and also it is used to explain the macroscopic properties of a gas such as pressure and temperature.

Sea level rise is an increase in the level of the world oceans due to the effects of global warming and burning fossil fuels is one of the causes of global warming because it releases carbon dioxide and other heat-trapped gasses into the atmosphere.

So, the relationship between kinetic molecular theory (KMT) and sea level rise is the distance between sea level and KMT which is 760nm as the sea level is rising because the gas level is increasing.

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Answer:

Freeze thaw, salt wedging

Explanation:

Freeze-thaw weathering occurs when rocks are porous (has holes) or permeable (allows water to pass through). It is an example of Mechanical Weathering.

Another type of mechanical weathering is called salt wedging.

The vocabulary word from collision theory to what was happening at the pet adoption.

Reactants - The foster family with the pet and the adoptive family entering the park alone

Products - The adoptive family with their new pet and the foster family  petless

Collision theory says that for a chemical reaction to happen, the reactant molecules must come in contact with each other with enough energy and with all things being equal or in sync. The rate of the reaction is proportional to the number of collisions that occur.

The other answers are:

Temperature - More adoptions happen in the summer than in the winter.

Surface Area - The foster families started in a solid block, but decided to spread out in the park.

Concentration - Once the foster families spread out, they were able to invite more foster families to the event

Catalyst - The foster families and adoptive families would sit together at a picnic table to meet the pet and fill out paperwork.

Activated Complex - Meeting between foster families and adoptive families to meet the pet and fill out paperwork

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Explanation:

Answer:

Bromine

Mercury

Bromine (symbol Br and atomic number 35) is a reddish-brown liquid, with a melting point of 265.9 K. Mercury (symbol Hg and atomic number 80) is a toxic shiny silvery metal, with a melting point of 234.32 K.