As the wavelength of an electromagnetic wave gets longer, the frequency ____________________.

The concentration in mol dm-³ of a solution which contains 3 moles of a given solute in 0.25dm³ (250cm³) of solution is 12 mol/dm³.

The concentration of a solution can be calculated by dividing the number of moles of the solution by its volume as per the following formula;

Concentration = moles ÷ volume

According to this question, a solution contains 3 moles of a given solute in 0.25dm³ (250cm³) of solution. The concentration of the solution can be calculated as follows:

Concentration = 3moles ÷ 0.25dm³

Concentration = 12 mol/dm³

Therefore, the concentration in mol dm-³ of a solution which contains 3 moles of a given solute in 0.25dm³ (250cm³) of solution is 12 mol/dm³.

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The metric prefixes are a follows;

The SI unit is the international system for the measurement of quantities. We  know that the SI system is based on the metric system. The metric system has the units meter, gram and seconds as part of it.

Sometimes we use prefixes to show the magnitude of quantities when we are using the metric system. Let us now try to find the correct prefix or power in the following cases;

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The number of oranges to be eaten each week to meet the requirement is 7.

Mass of vitamin C is 70 mg.That is it is equal to 0.070 g.

as 1 mg=1×10[tex]^-3[/tex] g. And 60 mg is equal to 0.060 g according to this conversion.

The mass of orange in ounces is given as 3 oz.

As 1 oz=28.3495 g.Therefore,3 oz=(3×28.3495)g

which is equal to 85.045 g.

Given that 100 g orange has 0.070 g of vitamin C.Mass of vitamin C in 85.045 g of oranges is,

                               0.070/100×85.045=0.0595 g

Vitamin C consumed in 1 day is 0.060 g. Therefore in a week vitamin C consumed is 7×0.060=0.42 g.

To calculate the number of oranges to be eaten in a week it is calculated as,

Number of oranges=mass of vitamin C consumed in a week /mass of 3 oz oranges

Number of oranges=0.42 g/0.0595 g

                              =7.05≈7

Therefore,number of oranges to be eaten in a week are 7.

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The Tricyglycerol yields more energy on oxidation is the one containing three residues of stearic acid because it get fully reduced.

when atom or ion loses the electron in the process called as oxidation or the loss of hydrogen is called as oxidation. when the atom or ion gain electron  in the process called as reduction or gain of hydrogen is called as reduction

when the oxidation takes place  the oxidation state of atom increases and when reduction takes place the oxidation state of species decreases.

when molecule is oxidized, it loses energy and when molecule is reduced , it gains energy

Thus ,we can say that,The triacyglycerol cotaining the three stearic acid residues yield more energy because it is fully reduced.

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A Polar covalent bond is formed by an unequal sharing of one or more electron pairs.

The bond formed by sharing of an electron pair between two atoms is known as covalent bond.

In a polar covalent bond  the atoms have an unequal attraction for electrons and so the sharing is unequal. Bond between Oxygen and Hydrogen in water molecule is one of the example of polar covalent bond.

In Non-Polar Covalent bond  the atoms have an equal attraction for electrons and so the sharing is equal. Bond between two Hydrogen atoms  in [tex]H_{2}[/tex] molecule is one of the example of non-polar covalent bond.

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Two Single and One Double Covalent Bond  are possible around a carbon atom. After the hydrogen, helium, and oxygen, carbon is the fourth most prevalent element in the universe by mass and the fifteenth most abundant element in the crust of the Earth.

Carbon can be considered a common component of all known life due to its abundance, distinctive diversity of organic compounds Bond and exceptional capacity to build polymers at Earth's typical temperatures. After oxygen, it makes up around 18.5% of the total mass of the human body. The allotropic form of carbon exhibits a wide range of physical properties.

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Answer:

C: The Cheetah running at a constant speed.

Explanation:

Acceleration can be defined as:

1: A decrease in speed

2: An increase in speed

3: A change in direction.

The cheetah is the only object that does not meet any criteria for acceleration.

The example that is not an example of acceleration is a cheetah running at a constant speed on a hunt. The correct option is option (c).

Acceleration refers to a change in velocity, either in magnitude or direction. In the case of the cheetah running at a constant speed, there is no change in velocity, so there is no acceleration.

The cheetah maintains a steady speed,  there is no change in velocity hence, it is not accelerating.

Therefore, a cheetah runs at a constant speed on a hunt. The correct option is option (c).

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In chemistry, the ball-and-stick model is a molecular ideal of a chemical matter which is to expose both the three-dimensional position of the atoms and the bonds among them. The atoms are normally symbolise by spheres, join by rods which shows the bonds.

Formaldehyde forms formaldehyde structure bond it shares double bond with O2 atoms.

Formaldehyde also known as methanol .

Methanol is colourless.

It is flammable.

It is gas at room temperature.

Methanol having pungent odor and it is a volatile organic compounds.

It is made by the composition of Hydrogen, oxygen, and carbons.

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Most foods that are high in calcium are poor sources of iron. this statement illustrates the characteristic of a nutritious diet known as balance.

Nutrition is an important factor in health and development. Better nutrition is associated with improved infant, child, and maternal health, stronger immune systems, safer pregnancies and births, reduced risk of non-communicable diseases (such as diabetes and cardiovascular disease), and longer lifespans. doing. Healthy children learn better. Well-nourished people are more productive and can create opportunities to gradually break the cycle of poverty and hunger.

Malnutrition in all its forms poses a significant threat to human health. I'm facing Malnutrition has several forms and including undernutrition (wasting or underdevelopment), inadequate vitamins or minerals, overweight, obesity, and consequent diet-related noncommunicable diseases.

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The hybridization of O in ozone molecule [tex]O_3[/tex] is [tex]sp^{2}[/tex]

The bond angle of ozone is 117.5° which is close to 120° , thus it show trigonal planar geometry and is [tex]sp^{2}[/tex] hybridized.

Bonding of oxygen in ozone can be stated as

Three sets of [tex]sp^{2}[/tex]  hybrid orbital overlap to produce two [tex]O-O[/tex] σ bonds and five lone pair of electrons , two on both side oxygen atom and one pair on central atom.

The π bonding is formed by unhybridized [tex]2p_z[/tex] orbital on every oxygen atom . This π bonding is delocalized over all three oxygen atoms of ozone molecule.

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Answer:

Explanation:

To determine the mass of each compound, we need to convert them into units of moles first. We use avogadros number to do this and use the molar mass of the compounds to convert to mass.

3.01 × 1023 molecules H2O ( 1 mole / 6.022x10^23 kg) (18.02 g / 1 mole) = 9.01 g

8.32 × 1020 formula units CaBr2 ( 1 mole / 6.022x10^23 kg) (199.89 g / 1 mole) = 0.28 g

1.93 × 1026 molecules XeF6 ( 1 mole / 6.022x10^23 kg) (245.28 g / 1 mole) = 78610.16 g

                                                 CO                     CO2

Initial partial pressure               1                        0.9

Equilibrium partial pressure     1 - x                     0.9 + x

The equilibrium constant is Kp=PCO2/PCO.

Substitute values: 0.259=(0.9+x) / 1−x

Hence, x = .  -0.509

Hence, the equilibrium partial pressures of CO and CO2 are 1.509 atm, -0.509 atm respectively.

The pressure that is exerted with the aid of one among the mixture of gases if it occupies the identical quantity on its very own is acknowledged as Partial pressure. Every gasoline exerts sure strain in a mixture.

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The number of particles produced is 8.1 * 10^21 particles.

The equation of the reaction is; [tex]CaCO3(s)-- > CaO(s) + CO2(g)[/tex]. We can be able to obtain the number of moles of the calcium carbonate can be obtained from;

Mass = 1.34 g

Molar mass = 100g

Number of moles =  1.34 g/ 100g = 0.0134 moles

Thus, the number of moles of carbonate that decomposed is  0.0134 moles

Given that the reaction is 1:1 and there are 6.02 * 10^23 particles in 1 mole of CaO, the number of particles of  CaO produced is;

0.0134 moles *  6.02 * 10^23 particles = 8.1 * 10^21 particles

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Gases other than compressed air are normally supplied in pressurized cylinders at 1500 psi to 2000 psi.

What are compressed gas cylinders used for?

Cylinders of industrial compressed gas used in oxyfuel welding and steel cutting. A gas cylinder is a type of pressure container used to store and contain gases at pressures higher than atmospheric pressure.

Thus, typically, pressurized cylinders containing gases other than compressed air are delivered at pressures between 1500 and 2000 psi.

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Nitrogen and phosphorous are pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties

Nitrogen and phosphorous are in same group VA group called pictogens and nitrogen family Nitrogen and phosphorous pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties Nitrogen and phosphorous have same valence electron that's why their physical and chemical properties are same

Phosphorus is a chemical element with an atomic number of 15, which means that the atomic structure includes 15 protons and 15 electrons. For Phosphorus, the chemical symbol is P the Phosphorus is also came under VA group called pictogens and nitrogen family thats why Nitrogen and Phosphorus are pair of elements expect to exhibit the greatest similarity in their physical and chemical properties.

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A gram of fat stores more energy than a gram of starch due to more C-H bonds  within fat molecules relative to starch molecules.

The energy released/stored by nutrients is known as calorific value.

The calorific value of a  substance is expressed in kilo calories(kcal).

1 kcal is defined the amount of energy required to raise the temperature of 1 kg of water by 1 °C.

The physiological calorific value of fats and carbohydrates is 9.0 kcal/g and 4.0 kcal/g respectively.

As it is evident from these values that the energy stored per gram of fat is more than the energy stored per gram of starch.

Now, the reason behind this difference in energies between these two molecules is due to the different number of C-H bonds present in them, as is evident from the adjoining images.

Therefore, A gram of fat stores more energy than a gram of starch due to more C-H bonds within fat molecules relative to starch molecules.

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A solution with ph 4 has 10000 times the h concentration of a solution with ph 8.

the solution, in chemistry, is a homogeneous mixture of two or more substances whose relative amounts can be varied continuously up to the so-called solubility limit. The term solution is usually applied to the liquid state of aggregation, but gaseous and solid solutions are also possible. Hypotonic, isotonic, and hypertonic solutions (tonic).

A solution is a homogeneous mixture of two or more components with particle sizes less than 1 nm. Common examples of solutions are the sugar in water and salt in water, soda water, etc. In solution, all components appear as a single phase.

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Answer:8.7%

Explanation:

The forward rate for a three-month period starting in one year is 11.36% per annum.

The forward rate for a specific time period represents the interest rate for borrowing or lending money during that period in the future.

Let's denote:

[tex]r_1[/tex] = Spot rate for one year (annual rate)

[tex]r_2[/tex] = Spot rate for one year and three months (annual rate)

The formula for the forward rate with continuous compounding is given by:

[tex]\[ F = \frac{e^{(r2 * t2)} - e^{(r1 * t1)}}{t2 - t1} \][/tex]

where:

F is the forward rate

[tex]t_1[/tex] is the starting time in years (one year)

[tex]t_2[/tex] is the ending time in years (one year and three months)

Substituting the value

[tex]\[ r_1 = 9.5\% \\r_1 = 0.095)[/tex]

[tex]r_2 = 0.096\\\[ t1 = 1 \text{ year} \][/tex]

[tex]\[ t2 = 1 + \frac{3}{12}[/tex] = 1.25 year back to the formula as

[tex]\[ F = \frac{e^{(0.096 * 1.25)} - e^{(0.095 * 1)}}{1.25 - 1} \][/tex]

[tex]\[ F = \frac{e^{0.12} - e^{0.095}}{0.25} \][/tex]

[tex]\[ F = \dfrac{1.1275 - 1.0991}{0.25} \][/tex]

[tex]\[ F= \dfrac{0.0284}{0.25} \][/tex]

F= 0.1136

Now, convert the forward rate back to percentage:

Forward rate (F) ≈ 0.1136 * 100% = 11.36%

So, the forward rate is 11.36% per annum.

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The missing table attached at the end.

Valine-valine and valine-leucine would be formed by heating a mixture of valine and N-protected leucine.

Amino acid leucine is protected at the N-terminal end, so it is not available to form a polypeptide at that end.

Peptide bond is a covalent chemical bond linking two consecutive alpha-amino acids from C1 (carbon number one) of one alpha-amino acid and N2 (nitrogen number two) of another along a peptide or protein chain.

Valine and leucine can react and form dipeptide valylleucine (valine-leucine), see picture below.

When two valine amino acids react, dipeptide valylvaline (valine-valine) is formed.

Polypeptide is a long and unbranched peptide chain with more than ten amino acids.

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The volume of the granite piece in milliliters if a graduated cylinder is filled 10.10 mL with water and a piece of granite is placed in the cylinder, displacing the level to 19.45 mL is 9.35mL.

Volume of a substance refers to the amount of that substance in a container. The volume is measured in litres (L), which can be converted to milliliters (mL) as follows:

1 Litre = 1000 milliliters

According to this question, a graduated cylinder is filled 10.10 mL with water and a piece of granite is placed in the cylinder, displacing the level to 19.45 mL.

This means that the volume the granite occupies is as follows:

Volume of granite = 19.45mL - 10.10mL = 9.35mL

Therefore, the volume of the granite piece in milliliters if a graduated cylinder is filled 10.10 mL with water and a piece of granite is placed in the cylinder, displacing the level to 19.45 mL is 9.35mL.

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A dehumidifier tank is emptied once a day. if the capacity of tank is 2 gallons , Number of Molecules of water the dehumidifier collects from the air per millisecond is  2.92 × 10³² molecules / milliseconds

The capacity of dehumidifier tank = 2 gallons

1 gallon = 4 quarts , 1 quart = 0.94633

1 gallon = 3.785 L

2 gallon = 3.785 × 2 = 7.57 L = 7570 ml

time taken to fill the tank = 1 day

Density of water = 1 g/ml

Mass of water = D × V

                        = 7570 × 1 = 7570 g

molar mass of water = 18 g/mol

no. of moles = mass / molar mass

                   = 7570 / 18 = 420.5 moles

now, 1 mole of water contains = 6.022 × 10²³ water molecules

420.5 moles of water = 6.022 × 10²³ × 420.5

                                    = 2.53 × 10²⁶ molecules

2.53 × 10²⁶ molecules collected in 1 day

1 day = 86400 sec

1 sec = 1000 milliseconds

86400 sec = 86400 × 1000 milliseconds

                  =  8.64 × 10⁷ milliseconds

so, the molecules of water collected per milliseconds

= 2.53 × 10²⁶ molecules / 8.64 × 10⁷ milliseconds

=  2.92 × 10³² molecules / milliseconds

Thus, A dehumidifier tank is emptied once a day. if the capacity of tank is 2 gallons, Number of Molecules of water the dehumidifier collects from the air per millisecond is  2.92 × 10³² molecules / milliseconds

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Answer:

A. They conduct heat.

Explanation:

The oxygen present in the fermentation reaction apparatus has caused this problem.

The biological process that produces beer is fermentation. The yeast used to make beer, Saccharomyces cerevisiae, is capable of both fermentation and cellular respiration.

Saccharomyces cerevisiae would engage in aerobic cellular respiration in the presence of oxygen, converting glucose to carbon dioxide and producing energy. However, without oxygen, the yeast engages in fermentation and turns the glucose into ethanol (alcohol).

If the alcohol concentration is almost zero following the brewing method, oxygen may be present in the fermentation reaction apparatus. Thus, the Saccharomyces cerevisiae will perform aerobic cellular respiration rather than fermentation in the presence of oxygen.

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The density of the second liquid is 0.4496.

"Density is the mass per unit volume." Density is known as a scalar quantity. It is denoted by a small d and the symbol for density is given as rho, a Greek symbol. Density is calculated as mass divided by volume.

The first density is

A flask weighs 43.50 g = M1

The mass is 96.75 g = M2

D1 = 1 g/ml

Density 2 = ?

The formula

M1 x D1 = M2 x D2

43.50 g x 1 g/ml = 96.75 g x D2

D2 = 43.50 g x 1 g/ml / 96.75 g = 0.4496.

D2 = 0.4496

Thus, the density of the second liquid is 0.4496.

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Some liquid in a jar can be separated by physical means into two separate liquids, which can then be separated no further. The liquid is a mixture

What is a mixture?

Typically, a mixture is described as a fabric that is composed of  or greater separate chemical additives that are not chemically sure to each other.

The bodily mixture of some of substances wherein the characteristics of every factor are maintained as the components are combined into answers, suspensions, or colloids is known as a aggregate.

for this reason, it is feasible to bodily separate a number of the liquid in a jar into  awesome liquids, and then the drinks can now not be separated anymore.

therefore, the liquid in a jar is a combination.

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In the mass spectrum of pentane, the presence of a peak with m/z = 57 is most likely to the detection of a butyl radical cation.

Because all molecular ions fragment, a few compounds have mass spectra that lack a molecular ion peak. That is not a problem you will encounter at A'level. In the mass spectrum of pentane, for example, the heaviest ion has an m/z value of 72.

Lines with m/z values one or two lower than one of the simple lines, for example, are frequently caused by the loss of one or more hydrogen atoms during the fragmentation process. The base peak (the tallest peak and thus the most common fragment ion) is at m/z = 57 this time. This, however, is not produced by the same ion as the pentane m/z value peak.

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Mass of potassium chloride (KCl) is 1.7 grams.

M(KCl) = 74.55 g/mol; molar mass of potassium chloride

V(KCl) = 650 ml = 0.65 l; volume of potassium chloride solution

c(KCl) = 35 mM = 0.035 M; concentration of potassium chloride solution

m(KCl) = c(KCl) × V(KCl) × M(KCl)

m(KCl) = 0.035 M × 0.65 l × 74.55 g/mol

m(KCl) = 1.7 g; mass of potassium chloride

Potassium chloride (KCl) is a salt with ionic bond.

Molecular weight is  the sum of the atomic weight values of the atoms in a molecule.

The concentration is the amount of solute that has been dissolved in a given amount solution.

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C₁₈H₃₂O₁₆ is the molecular formula called a-maltotriose for a molecule made by linking three glucose molecules together by dehydration reactions.

It is a dehydration reaction, it means that when two molecules are linked together, there will be one molecule of water H₂O removed

A-maltotriose molecule is a trisaccharide molecules which means linkage of three glucose molecules linked with 1,4 glycosidic bond this is called as  a-maltotriose which is formed in the reaction as product

The reaction will be:

C₆H₁₁O₅-OH+H-C₆H₁₀O₅-OH+H-C₆H₁₁O₆→C₁₈H₃₂O₁₆+2H₂O

Here one molecule of water H₂O removed.

Therefore  molecular formula of the molecule formed will be C₁₈H₃₂O₁₆.

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Energy-requiring reactions can occur in biological systems because they can be coupled with reactions that are exergonic reaction.

In chemical thermodynamics, an exergonic reaction is a chemical reaction where the conversion in the free energy is negative (there is a net allow to leave of free energy). This shows a unbidden reaction if the structure is closed and starting and final temperatures are the similar.

Formula of exergonic reaction :

∆G = Gproducts - Greactants

where

∆G = change in free energy

G-products = free energy of products

G-reactants = free energy of reactants

Now, it can understood that "Energy - requiring reactions can occur in biological systems because they can be coupled with reactions that are exergonic reactions."

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In the reaction between a monosaccharide and a ferric ion, The carbonyl carbon is oxidized to a carboxyl group, the cupric ion is reduced.

Chemical reactions often involve color changes, temperature changes, gas evolution, or precipitate formation. Simple examples of everyday reactions are digestion, combustion, and cooking. The definition of reaction is a reaction. An example of a reaction is someone stopping their car at a stop sign. noun. response to stimuli.

The five basic types of chemical reactions are combination, decomposition, single exchange, double exchange, and combustion. By analyzing the reactants and products of a particular reaction, we can classify them into one of these categories. Some responses fit into multiple categories. It is modeled after the old Italian reaction, the French response, derived from the medieval Latin response (nominative to react). It is a noun of action formed in Late Latin from the past participle stem of the Latin reader.

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