what is the poh of a 0.0085 m koh solution?

Answer:

I think it's False

Explanation:

Explanation:

The amount of water in, on, and above our planet does not increase or decrease because of the water cycle

So it's false

p [OH-] = -log[OH-]= -log ( 1x10^-11M) = 11

we know that

p[OH-] + p[H+] = 14

so p[H+] = 14- p[OH-] = 14- 11 = 3

pH = 3, answer

The concentration of the NaOH solution is 10.00 g/dm³.

To calculate the concentration in g/dm³ of a solution of NaOH containing 0.25 moles in 1 dm³, we need to know the molar mass of NaOH.

The molar mass of NaOH is calculated as follows:

Na (Sodium) = 22.99 g/mol

O (Oxygen) = 16.00 g/mol

H (Hydrogen) = 1.01 g/mol

Molar mass of NaOH = 22.99 g/mol + 16.00 g/mol + 1.01 g/mol = 40.00 g/mol

Now, we can calculate the concentration (C) using the formula:

C = (moles of solute) / (volume of solution in dm³)

C = 0.25 moles / 1 dm³

C = 0.25 mol/dm³

To convert moles to grams, we can multiply the molar mass by the number of moles:

Concentration in g/dm³ = (0.25 mol/dm³) * (40.00 g/mol)

Concentration in g/dm³ = 10.00 g/dm³

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Nitrogen gas becomes converted into biologically usable chemical forms by specific bacteria called aerobic bacteria.

In atmosphere, nitrogen gas is present in gaseous form while in soil nitrogen in not present in natural form.

There are specific oxygen consuming or aerobic bacteria also called 'nitrogen fixing bacteria' which use atmospheric nitrogen and transform it into biologically usable chemical compounds such as ammonia.

Later, fixed ammonia is used by plants as rich nitrogen source.

To put it simply, nitrogen cycle is a process during which atmospheric nitrogen moves through environment to the living things in the form ammonia.

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Compounds formed and named:

Fe²⁺ + Cl⁻¹ → FeCl₂, Iron(II) chloride

Mn²⁺ + Cl⁻¹ → MnCl₂, Manganese(II) chloride

Hg²⁺ + O⁻² → HgO, Mercury(I) oxide

Cu⁺¹ + O⁻² → Cu₂O, Copper(I) oxide

Cu⁺² + O⁻² → CuO, Copper(II) oxide

Sn⁺⁴ + Br⁻¹ → SnBr₄, Tin(IV) bromide

The traditional system of naming compounds typically involves using the names of the elements in the compound along with suffixes to indicate the relative proportions of each element. For example, the compound NaCl would be named sodium chloride, and the compound CaCO₃ would be named calcium carbonate.

The traditional system is often used for common, well-known compounds, while the systematic system of naming, which uses prefixes and numerical indicators to indicate the number of each element in the compound, is often used for more complex or less well-known compounds.

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Heat transfer is the process of thermal energy moving from one object to another due to a temperature difference. There are three types of heat transfer: conduction, convection, and radiation.

Conduction is the transfer of heat through direct contact between two objects, such as a pot on a stove or a person touching a hot surface. A common application of conduction is in cooking, where heat is transferred from a stove or oven to the food being cooked.

Convection is the transfer of heat through the movement of fluids, such as air or water. A common application of convection is in heating and cooling systems, where warm or cool air is circulated through a building to regulate its temperature.

Radiation is the transfer of heat through electromagnetic waves, such as heat radiating from a fire or the sun. A common application of radiation is in solar panels, which convert sunlight into usable energy.

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Note: The correct question would be as bellow,

What is heat transfer and what are the 3 types of heat transfer Support your answer with applications for each type?

Answer: B. The actual mechanical advantage of the ramp.

Explanation:

The professor saying that the ramp SHOULD have a mechanical advantage of 3 indicates that that would be the ideal mechanical advantage. Since Rubia calculated it to be 2.8, that means that it is the acutal mechanical advantage. The actual advantage will be reduced from the ieal due to things like friction.

Large metropolitan areas have difficulty dealing with solid waste because they lack suitable landfill sites nearby since the city is expansive and the correct option is option D.

Disposal of solid wastes is a stinging and widespread problem in both urban and rural areas in many developed and developing countries.

This is mainly due to the increasing generation of such solid waste and the burden posed on the municipal budget. In addition to the high costs, the solid waste management is associated lack of understanding over different factors that affect the entire handling system.

Thus, the ideal selection is option D.

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Answer:

carbon-12, potassium, and argon

Explanation:

The three elements that geologists measure to determine the age of an organism's remains are carbon-12, potassium, and argon.

So, the second option is correct one.

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Answer:

CaCO3 + 2HCl ---> CaCl2 + H2O + CO2

Explanation:

The reaction between solid calcium carbonate and a mineral acid such as aqueous HCl is a neutralization reaction and occurs with the evolution of CO2 gas.

The balanced equation is given below

CaCO3 + 2HCl ---> CaCl2 + H20 + CO2

The product CaCl2 is water soluble which accounts for why the stain is removed, while CO2 gas escapes away from the reaction surface.

Answer:

CaCO3(s) + 2HCl(aq) -------> CaCl2(aq) + 2CO2(g) + H2O(l)

Explanation:

CaCO3(s) + 2HCl(aq) -------> CaCl2(aq) + 2CO2(g) + H2O(l)

When an acid reacts with a metal carbonate a salt, carbon dioxide and water are formed. Hard water usually contain Ca^2+ in the form of Ca(HCO3)2. Minor heating causes CaCO3(calcium carbonate) to deposit on surfaces through which the hard water passes.

Calcium carbonate reacts with acids to produce a calcium salt, water and carbon dioxide: Calcium carbonate + Hydrochloric acid → Calcium chloride + Water + Carbon dioxide. The carbonate radical breaks up into carbon dioxide and oxygen; the oxygen binds with the acid's hydrogen ions to make water; and a solution of calcium chloride remains.

Answer: An ignition source is a process or event which can cause a fire or explosion. Open flames, sparks, static electricity, and hot surfaces are all possible ignition sources. An explosion can occur when flammable gases or vapors in the air come in contact with an ignition source such as a spark.

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It all happens due to VSPER model and the lone pair decreases the bond angle between bonding pairs of atoms.

The Lewis electron-pair technique identifies which atoms have lone pairs of electrons and can be used to forecast the number and types of bonds that will exist between the atoms in a substance. However, this method offers little insight into how atoms are actually arranged in space. The valence-shell electron-pair repulsion (VSEPR) model, which can be used to predict the shapes of many molecules and polyatomic ions, is introduced as we continue our discussion of structure and bonding. However, keep in mind that the VSEPR model, like any model, is only a partial representation of reality; it doesn't reveal bond lengths or the existence of multiple bonds.

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Answer: 5.248

Explanation: 0.53/0.1010 = 5.24752475248, and round to the thousandths.

Answer:

Mass = 96.07 g

Explanation:

Given data:

Mass of citric acid = ?

Molar mass of citric acid = 192.14 g/mol

Volume of citric acid solution = 0.10 L

Molarity of solution = 5.00 M

Solution:

First of all we will calculate the number of moles from molarity formula. Then we will determine the mass from moles formula.

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

5.00 M = n/0.10 L

n = 5.00 mol/L× 0.10 L

n =0.5 mol

Mass of citric acid:

Number of moles = mass/molar mass

0.5 mol = mass/ 192.14 g/mol

Mass = 0.5 mol  × 192.14 g/mol

Mass = 96.07 g

Since the water increased by 7 degrees for the peanut and 3 degrees for the chip, the conclusion would be that the peanut has more energy than the chip.

Calorimetry is the science of measuring the quantity of energy, usually in the form of heat, that is released during a reaction.

In this case, the energy released by the peanut and the chip were measured using calorimetry. The energy released was captured by the water and helps raise the temperature of the water.

The more energy released by the substances, the more the temperature of the water is raised.

Thus, since the peanut raised the temperature of the water by 7 degrees while the chip was only able to raise it by just 3 degrees, one can effectively conclude that the peanut has more energy than the chip.

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A necessary trait of a good hypothesis is that it is clear and testable.

The correct option is option 2.

A hypothesis is a theory put up to explain a phenomenon.

A hypothesis must be testable according to the scientific method for it to be considered a scientific hypothesis. Scientific hypotheses are typically based on prior observations that cannot be adequately explained by the current body of knowledge.

An important trait of a good hypothesis is that it must be clear and testable.

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Answer:

v is the wave speed in metres per second, m/s. f is the frequency in hertz, Hz. λ (lambda) is the wavelength in metres

In this decay reaction, 31h is decaying into 32he+. The type of radiation that must be given off is an alpha particle, which is a helium nucleus consisting of two protons and two neutrons.

Alpha is a measure of an investment’s performance relative to a benchmark or a market index. It can be a measure of how much an investment has outperformed its benchmark, or conversely, how much it has underperformed its benchmark. Alpha is often referred to as a risk-adjusted return measure, as it adjusts for the amount of risk taken on by an investor. Alpha measures the performance of a portfolio or fund manager over and above the market’s performance, and is an important metric used by investors when assessing the quality of a portfolio manager. When used in combination with other measures of performance, alpha can help evaluate the success of a portfolio manager in generating returns in excess of a benchmark.

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It attempts to explain the idea that:C. energy is quantized

Answer:

The sugar will dissolve in water.

The oil will float in water.

Explanation:

The sugar molecules will fill up the remaining space between the molecules of water.

The oil being lighter and less denser than water floats in the water.

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1.22 grams of water has 5.0 x10^22 H2O water molecules.

A molecule is a group of two or more atoms held together by attractive forces known as chemical bonds. There is no guarantee that the term will include ions that meet this criterion, depending on the context.

Calculate the number of moles of water = mass / molar mass of water

Moles = 1.2 g/ 18 g/mol = 0.083 mol H2O

1 mole of any substance = 6.02 x 10^23 H2O molecules (Avogadro's number)

Resolution:

Molecules = 0.083 moles (6.02 x 10^23 H2O molecules/mole)

= 0.5 x 10^23 or 5.0 x10^22 H2O molecules

answer:

Number of molecules = 5.0 x 10^22 H2O molecules  

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The IUPAC name for the given compound \((CH_3)_2C=CHCH_2CH_2OH\) is 3-hydroxy-2-methylbut-2-ene.

First, we identify the longest continuous carbon chain, which consists of five carbon atoms. This forms the parent chain, which is a butene.

Next, we locate the double bond, which is between the second and third carbon atoms. Since the double bond starts at the second carbon atom, we indicate it as "but-2-ene."

Moving on, we need to indicate the presence of substituents. In this case, we have a methyl group attached to the second carbon atom. Therefore, we include the prefix "2-methylbut-2-ene."

Lastly, there is a hydroxyl group (-OH) attached to the fourth carbon atom. We denote this as "hydroxy" and specify the position of the hydroxyl group, resulting in the full name "3-hydroxy-2-methylbut-2-ene."

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Answer:

Its actually true

Explanation:

Your Welcome Canada,

OH YEAH!!!!!!

Answer:

The correct answer is "True".

Explanation:

I hope this helps!

Answer:

432cm³

Explanation:

Given parameters:

Length  = 12cm

Height  = 6cm

Width  = 6cm

Unknown:

V = ?

Solution:

We have been given that;

                    V  = L x W x H

So;

                 V  = 12cm  x 6cm x 6cm  = 432cm³

Identifying each reaction with their correct term

A double replacement reaction is a type of chemical reaction whereby two reactants exchanges its ions ( cations or anions ) to produce two new products. It can also known as a double displacement reaction. while a single replacement reaction leads to the substitution of one element for another in chemical compound.

Hence we can conclude that the answers to your questions are as listed above.

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Hooke's law dictates that I stretching frequencies are dependent on "bond strength and molar masses of the atoms". The correct answer is (a).

Hooke's law states that the stretching frequency of a bond is directly proportional to the force constant of the bond, which is in turn dependent on the bond strength and the reduced mass of the atoms involved. The bond strength is determined by factors such as bond length, bond order, and the electronegativity of the atoms, while the reduced mass is determined by the molar masses of the atoms involved in the bond.

Therefore, option (a) Bond strength and molar masses of the atoms is the correct answer. Options (b), (c), and (d) are not relevant to Hooke's law and are not related to the stretching frequency of a bond.

The correct answer is (a).

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The true statements about the limiting reactant are: a) The limiting reactant limits the amount of product that can be produced. d) The limiting reactant runs out first.

The limiting reactant in a chemical reaction is the reactant that is completely consumed first, thereby limiting the amount of product that can be formed. It determines the maximum amount of product that can be obtained based on its stoichiometric ratio with the other reactants.

Statement a) is true because the limiting reactant restricts the extent of the reaction, preventing the other reactants from fully reacting and limiting the amount of product that can be produced.

Statement d) is also true because the limiting reactant is the one that gets consumed completely, exhausting its supply first and terminating the reaction.

Statements b) and c) are false. The limiting reactant is not determined by the molar mass (statement b) or by the coefficient in the reaction equation (statement c). It is solely determined by the stoichiometry and availability of the reactants in the given reaction.

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Answer:

cause of climate change: The earth's climate is affected and changed through a lot of natural causes like volcanic eruptions.

how it causes change:  Volcanoes can be extremely dangerous to earth because it can impact climate change. During major explosive eruptions huge amounts of volcanic gas, aerosol droplets, and ash are injected into the stratosphere.

what is the effect of the change: Major eruptions alter the Earth's radiative balance because volcanic aerosol clouds absorb terrestrial radiation, and scatter a significant amount of the incoming solar radiation, an effect known as "radiative forcing" that can last from two to three years following a volcanic eruption.

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