find the concentration of ba2 in 0.1 m (ch3)4n io3- solution saturated with ba(io3)2. assumate that

Answer:

C. Their exact amounts are not currently known.

Explanation:

The statement that best describes the availability of nonrenewable energy resources is that their exact amounts are not currently known.

Non-renewable sources of energy are those sources that are subject to exhaustion from usage i.e. cannot replenish itself.

Non-renewable sources unlike their renewable counterparts are exhaustible because they don't replenish themselves over a short time.

Examples of non-renewable sources of energy are:

Therefore, the statement that best describes the availability of nonrenewable energy resources is that their exact amounts are not currently known.

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Answer:

Filter it

Explanation:

Answer:

225g

Explanation:

250mL x 0.9g/mL = 225g

Answer:

225g

Explanation:

d=m/ml

m= d.ml

m=0,9g/ml.250ml

m=225g

Answer:

Q = 202.05 J

Explanation:

Given data:

Mass of iron = 75 g

Initial temperature = 295 K

Final temperature = 301 K

Specific heat capacity of iron = 0.449 J/g.K

Heat required = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT  = 301 K - 295 K

ΔT  = 6K

Q = 75 g ×0.449 J/g.K × 6K

Q = 202.05 J

The amount of sulfuric acid needed to change the pH of a 512.2L of water to 5 is 0.50grams.

To calculate the amount of sulfuric acid needed to change the pH of water to 5, the concentration of sulfuric acid must be calculated as follows:

Molarity of sulfuric acid = antilog -5 = 0.00001M

molarity = no of moles ÷ volume

no of moles = 0.00001 × 512.1 = 0.00512moles

mass of sulfuric acid = 0.00512moles × 98g/mol = 0.50g

Therefore, the amount of sulfuric acid needed to change the pH of a 512.2L of water to 5 is 0.50grams.

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These are problems related to mixing different solutions to obtain a desired concentration.

Problem 1: 200 g of 17% solution, mix 100 g of 15% solution with 100 g of 20% solution.

Problem 2: 54 g of 18% solution and 246 g of 5% solution are needed.

Problem 3: The mass percentage of the final solution is (20015 + 35020) / (200 + 350) = 18.33%

Problem 4: The mass percentage of the final solution is (30015 + 35) / (300 + 35) = 13.23%

Problem 5: The mass percentage of the final solution is (40025) / (400 + 150) = 21.74%

Mass is a fundamental physical property of matter and is defined as the amount of matter that an object contains. It is usually measured in units of grams (g) or kilograms (kg). Mass is related to but different from weight, which is the force exerted on an object by gravity. In chemistry, mass is often used to express the amount of a substance in a sample or reaction.

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The concentration of the NaOH solution required for the reaction given the data is 0.44 M

H₂SO₄ + 2NaOH —> Na₂SO₄ + 2H₂O

From the balanced equation above,

CaVa / CbVb = nA / nB

(0.1 × 22) / (Cb × 10) = 1 / 2

2.2 / (Cb × 10) = 1 / 2

Cross multiply

Cb × 10 = 2.2 × 2

Cb × 10 = 4.4

Divide both side by 10

Cb = 4.4 / 10

Cb = 0.44 M

Thus, the concentration of the NaOH solution is 0.44 M

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Answer:

A small amount of chemical splashes in Frank's eye. What should happen next? Frank should go to the eyewash station while his lab partner tells the teacher what happened.

Explanation:

Brainlist

There are two characteristics of molecules, one is geometry and other is shape. Shape is excluding lone pair surrounding the central element and geometry is including the lone pair. Therefore, the angle of the given molecule can be found out by VSEPR theory.

VSEPR stands for valence shell electron pair repulsions. VSEPR theory is used to predict the shape and geometry of molecules on the basis of valence electrons pairs that are present around the central element of the molecule.

According to VSEPR theory, Lone pair lone pair repulsion is greater than bond pair bond pair repulsion. There are so many limitations of VSEPR theory. There is a repulsion between bond pair electrons and lone pairs present on the central element.

a) bond angle is 180°

b)bond angle is 120°

c)bond angle is 107.28'

d)bond angle is 109.28'

Therefore, the angle of the given molecule can be found out by VSEPR theory.

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Not enough information man

At 25°C, water vapour typically forms at a heat of -57.8 Kcal/mole. suppose H were to fill The Diffusible Hindenberg, which has a capacity of 1.4 * 10 8 litres.

The relative humidity that a person encounters in a given region is one of the best instances of vapour pressure in real life. The difference between the saturated vapour pressure of water in the air and the actual vapour pressure of water in the air is known as relative humidity.

Certainly a pure substance, water vapour. Yet, as moisture can condense or evaporate, changing the mixture's composition, wet air is not a pure substance.

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The electrical charge of the nucleus of an atom is +12 then 12 electrons does the atom have in its neutral state

Basic property of matter carried by some elementary particles that governs how the particles are affected by an electric or magnetic field and when a neutral atom gains or loses electrons, it becomes an ion and heavier atoms tend to have more neutrons than protons, but the number of electrons in an atom is always equal to the number of protons and so an atom as a whole is electrically neutral

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The temperature of the gas in Kelvin, after its volume is reduced to 2,450 mL, is approximately 143.27 K.

To determine the temperature of the gas in Kelvin after its volume is reduced, we can use the combined gas law, which relates the initial and final conditions of pressure, volume, and temperature for a given amount of gas.

The combined gas law equation is:

(P₁ * V₁) / T₁ = (P₂ * V₂) / T₂

Where P₁ and P₂ are the initial and final pressures, V₁ and V₂ are the initial and final volumes, T₁ is the initial temperature in Kelvin, and T₂ is the final temperature in Kelvin.

Given that the initial volume V₁ is 3,480 mL, the initial temperature T₁ is -70.0 °C (which needs to be converted to Kelvin), and the final volume V₂ is 2,450 mL, we can substitute these values into the equation.

To convert -70.0 °C to Kelvin, we add 273.15 to it, resulting in T₁ = 203.15 K.

Now we can solve for T₂:

(T₂ * V₁) / T₁ = V₂

T₂ = (V₂ * T₁) / V₁ = (2,450 mL * 203.15 K) / 3,480 mL

Simplifying the equation, we find:

T₂ ≈ 143.27 K

Therefore, the temperature of the gas in Kelvin, after its volume is reduced to 2,450 mL, is approximately 143.27 K.

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A rainbow is produced through a proces that includes refraction, reflection, and dispersion of  sunlight.

A rainbow is formed when sulinght is refracted and reflected by rain drops in the atmospher.

The sunlight is split into its component colors, which is why rainbows appear as having an array of colors. This is due to each color being bent by a different amount during refraction.

The colors of a rainbow are always in the same order, with red on the outside and violet on the inside.

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Answer:

By measuring through scale

Explanation:

CAN YOU TELL THE NAME OF COUNTRY BECAUSE I AM FROM NEPAL

Answer:

[H₃O⁺] = 0.0507 M

pH = 1.29

Explanation:

23.1 g of HCI (a strong acid) is added to water to make 1250 mL of solution. Calculate [H₃O⁺] and pH of the solution.

Step 1: Given data

Step 2: Calculate the concentration of HCl

We will use the following expression.

[HCl] = mass HCl / molar mass HCl × liters of solution

[HCl] = 2.31 g / 36.46 g/mol × 1.250 L

[HCl] = 0.0507 M

Step 3: Calculate the concentration of H₃O⁺

HCl is a strong acid according to the following equation.

HCl(aq) + H₂O(l) ⇒ H₃O⁺(aq) + Cl⁻(aq)

The molar ratio of HCl to H₃O⁺ is 1:1. Then, [H₃O⁺] = 0.0507 M.

Step 4: Calculate the pH of the solution

We will use the following expression.

pH = -log [H₃O⁺]

pH = -log 0.0507

pH = 1.29

To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.

To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.

If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).

However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.

In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.

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In a protein molecule, the number of amino acid molecules may be as few as d. 50.

Proteins are large macromolecules composed of chains of amino acids. These amino acids are linked together through peptide bonds to form the primary structure of a protein. The number of amino acids present in a protein molecule can vary greatly and depends on the specific protein.

Proteins can range in size from small peptides composed of just a few amino acids to large complex proteins containing thousands of amino acids. The minimum number of amino acids required for a protein to be considered functional is typically around 50. This is because proteins need a certain length and structural complexity to carry out their specific functions.

Proteins play vital roles in living organisms and are involved in various biological processes such as enzyme catalysis, cell signaling, structural support, and immune response. The specific number and sequence of amino acids in a protein molecule determine its unique structure and function.

Therefore, while some proteins may consist of as few as 50 amino acids, larger and more complex proteins can contain thousands of amino acids, enabling them to perform intricate and diverse functions within living systems. Therefore, Option D is correct.

The question was incomplete. find the full content below:

In a protein molecule, the number of amino acid molecules may be as few as

a. 5

b. 5,000

c. 500

d. 50

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Answer:

a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction

The density of the metal is 200.25 g/cm^3.

Explanation:

Answer:

Yes.

Explanation:

Yes.

Answer:10-1707

Explanation:

If the caffeine concentration in a particular brand of soda is 2.99 mg/oz, drinking, The number of cans of soda would be lethal is 258 cans.

Caffeine is a stimulant. In the brain, it blocks the effects of a chemical called adenosine, which makes you feel sleepy. we then feel more alert and energetic, which is why many people drink soda, coffee or tea to stay awake. Caffeine may keep you awake even if you don't want it to

Given

v = 10 000/3.23 =3095.96 oz

Therefore,

Number of cans = 3095.96 /12 =258 cans

If the caffeine concentration in a particular brand of soda is 2.99 mg/oz, drinking, The number of cans of soda would be lethal is 258 cans.

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Answer:

LED bulbs fit standard light sockets and are the most energy-efficient option. LEDs have lower wattage than incandescent bulbs but emit the same light output. This allows them to produce the same amount of light but use less energy. LEDs can last over 20 years and don't contain mercury

Answer:

From the energy diagram, we can see that the reaction mechanism is an example of a two-step reaction. The first step (S1) involves the combination of ethylene (C₂H4) and hydrogen bromide (HBr) to form an ethyl cation (C₂H5+) and a bromide anion (Br). In the second step (S2), the ethyl cation and bromide anion combine to form ethyl bromide (C₂H5Br). The reaction is exergonic as evidenced by the fact that the activation energy, represented by the peak in the energy diagram, is negative. This indicates that the reaction releases energy.

According to the concept of stoichiometry and balanced chemical equation,165 g of carbon dioxide is produced on burning of 120 g of methanol.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

According to the given chemical equation, as 64 g of methanol produces 88 g of carbon dioxide .

∴120 g of methanol produces 120×88/64=165 g of carbon dioxide.

Thus, 165 g of carbon dioxide is produced by 120 g of methanol.

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The isotope of calcium-234 (234Ca) undergoes alpha decay and emits an alpha particle (helium-4 nucleus) to become a new isotope, thorium-230 (230Th).

What are Isotopes?

Isotopes are basically atoms of the same element that have a different number of neutrons. This different number of neutrons results in an atom of the same element having a different atomic mass than another atom of the same element. Isotopes of an element have the same number of protons, but a different number of neutrons. This means that isotopes of an element have the same chemical properties, but different physical properties.

The alpha particle is composed of two protons and two neutrons. The mass number of 234Ca is 234, so the atomic number is also 234, since it is the same as the number of protons in the nucleus. After the alpha decay, the mass number of 230Th is 230, which means the atomic number is now 230 (the number of protons in the nucleus).

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an object becomes positively charged when it LOSES ELECTRONS.

* protons are positive, so losing protons means that it would be negatively charged.

* gaining electrons would make it more negatively charged.

* gaining neutrons changes nothing because neutrons are neutral.

Answer:

Here the oxidizing agent is Mg and the reducing agent is the O2.

This is because Mg is getting taking in O and is reducing itself to form MgO.

This Magnesium oxide, or magnesia, so formed is a white hygroscopic solid mineral that occurs naturally as percales and is a source of magnesium.

Explanation: