A 10-g mass of krypton occupies 15. 0 L at a pressure of 156 kPa. Find the
volume of the krypton when the pressure is increased to 215 kPa at the same
temperature

The only value of c that would make the function f(x) a probability density function is c = 0.

The function f(x) cannot be a probability density function if c is any non-zero value. A probability density function must satisfy two conditions: it must be non-negative for all values of x, and its integral over all possible values of x must be equal to 1.

However, in this case, the function f(x) is equal to 0 for all values of x less than 0, so its integral over all possible values of x is equal to 0.

Therefore, the only value of c that would make f(x) a probability density function is c = 0, in which case the function is equal to 0 for all values of x, and its integral over all possible values of x is also equal to 0.

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Answer:

12

Explanation:

pOH = -log(1.0 x 10^-2) = 2

pH = 14 - pOH

pH = 14 - 2 = 12

Answer:

1) high pH is required

2) other ions are precipitated along with the strontium ions

Explanation:

According to the solubility rules all phosphates are insoluble except those of sodium, potassium, and ammonium. This implies that strontium phosphate is insoluble in water. This explains why strontium ions can be precipitated from drinking water supply using phosphate. The main problem with the precipitation of strontium using phosphate is that it usually requires a high pH as the precipitation occurs under very alkaline conditions.

The main reason why the results may not be accurate is that other ions are precipitated along with the strontium such as calcium ions and magnesium ions. This may lead to inaccurate determination of the amount of strontium ions present.

Answer:

Explanation:

The fundamental issue for precipitation of Strontium Phosphate, is that the other metal cations (Calcium, Barium, Iron, and so on.), present in the town water, are likewise encouraged as Phosphate. In this manner, alongside Strontium Phosphate, Phosphates of a few different cations are additionally encouraged. In this way, Strontium Phosphate can't be weighed precisely. This will prompt off base outcomes.  

The response will be Exothermic, if the temperature of response increments.

Answer:

A

Explanation:

the type of soil the tulips receive_ with or without fertilizers

Answer:

It won't work as well. You can try though, it won't hurt anything

A tertiary cyclohaloalkane is 1-bromo-1-methylcyclohexane. This indicates that it hinders carbon-1 sterically. As a result, committing to SN1 is more likely than SN2.

The number of protons six and letter C are attributed to the chemical element carbon. Four of its four available electrons can be used to create covalent chemical connections because it is a nonmetallic, tetravalent atom. The periodic table's group 14 includes it. Just 0.025 percent of the carbon on Earth is found in its crust.

Coal, toxic gases, and crude oil are all utilized as fuel in it. It is employed to create a wide range of products, including polymers and steel alloys. Even black ink for printing or painting is produced with it.

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The final pressure of the diatomic gas that is expanded adiabatically is 140 KPa.

For any adiabatic process, the relation between volume and pressure is given by,

PVⁿ = C

Where P is the pressure and V is the volume,

C is a constant and

n  is adiabatic index.

It can be written,

PVⁿ = pvⁿ

The value of adiabatic index for a diatomic gas is 1.44.

P is the initial pressure which is given to be 71KPa,

V is the initial volume which is given to be 3m³.

p is the final pressure,

v is the final volume which is given to be 1.4m³.

So, now putting all the values accordingly,

(3×71000)^1.44 = (1.4×p)^1.44

p = 140KPa

So, the final pressure is 140 KPa.

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Answer:

Explanation:

The volume of distilled water that should be added to 25 cm3 of 0.125 moldm-3 HCl in order to dilute it 10 times can be calculated using the following equation:

Volume of added water = (25 cm3 x 10) / (0.125 moldm-3)

= 200 cm3

Therefore, the volume of distilled water that should be added to 25 cm3 of 0.125 moldm-3 HCl in order to dilute it 10 times is 200 cm3.

Answer:

D if im pretty sure

Explanation:

In 1909 he began experiments that were to change the face of physics. He discovered the atomic nucleus and developed a model of the atom that was similar to the solar system.

He found that the atom was made up of mostly empty space. Hence, option D is correct.

An atom contains a central nucleus surrounded by one or more electrons.

In 1909 Ernest Rutherford started experiments to change the face of physics. Ernest Rutherford discovered the atomic nucleus and developed a model of the atom that was exactly the same as the solar system.

Hence, he found that the atom was made up of mostly empty space.

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Answer:

Peer review is a quality control measure for medical research. It

is a process in which professionals review each other's work to

make sure that it is accurate, relevant, and significant. Scientific

researchers aim to improve medical knowledge and find better

ways to treat disease.

if I am right mark the answer as brainliest

Answer:

Protons: 22

Neutrons: 26
Electrons: 22

Explanation:

Titanium's atomic number is 22, meaning that the number of protons it has in its nucleus is also 22. # of electrons = # of protons, so the number of electrons is also 22. Titanium has an atomic mass of 47.867, but we can round up to 48. To find the atomic mass, we add up number of protons and neutrons. We know the number of protons as 22, so we subtract 22 from 48 and get a number of 26. Thus, the number of neutrons is 26.

Have a lovely rest of your day/night, and good luck with your assignments! ♡

Answer:

iv it does not make but if im wrong dont report please!

The correct matches are:

(i) Acid chlorides and esters experience primarily dipole-dipole interactions between their molecules.

(ii) 1º and 2º amides experience primarily hydrogen bonding between their molecules.

(iii) Acid chlorides, esters, and 3º amides have lower boiling points than other carboxylic acid derivatives of similar size and shape.

(iv) 1º and 2º amides have the highest boiling points among other carboxylic acid derivatives of similar size and shape.

i.

Acid chlorides and esters experience primarily dipole-dipole interactions between their molecules due to the presence of polar bonds within the molecules.

ii.

1º and 2º amides experience primarily hydrogen bonding between their molecules, as they contain the necessary hydrogen and oxygen or nitrogen atoms for hydrogen bonding.

iii.

Acid chlorides, esters, and 3º amides have lower boiling points than other carboxylic acid derivatives of similar size and shape. This is due to the absence of hydrogen bonding in these compounds, resulting in weaker intermolecular forces.

iv.

1º and 2º amides have the highest boiling points among other carboxylic acid derivatives of similar size and shape. This is because they can form extensive hydrogen bonding between their molecules, leading to stronger intermolecular forces and higher boiling points.

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The dot structure that can be shown to be incorrect is the dot structure that has been shown by option A

The Lewis structure is based on the concept that atoms tend to gain, lose, or share electrons in order to achieve a stable electron configuration similar to that of a noble gas. In the Lewis structure, the valence electrons of the atoms are represented as dots around the symbol of the atom.

We can see that in the dot structure that is in option A the both atoms are coming from the hydrogen atoms and shoud not be differently marked.

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Answer:

When fuels are burned in vehicle engines, high temperatures are reached. At these high temperatures, nitrogen and oxygen from the air combine to produce nitrogen monoxide. When this nitrogen monoxide is released from vehicle exhaust systems, it combines with oxygen in the air to form nitrogen dioxide.

Explanation:

Explanation:

Nitrogen and oxygen from the air combine at high temperatures in the engine to produce nitrogen (II) oxide by the reaction :

N2(g) + O2(g) → 2NO(g).

Nitric oxides rise in the atmosphere and are oxidized to nitrogen dioxide, NO2 which dissolves in the precipitating water to form acid rain.

For sale in her store, the florist ordered 72 daisies. Only one-fourth of the daisies are yellow, the rest are white. The florist was selling 54 yellow daisies.

Determine the quantity of yellow daisies the florist had to sell. We must first ascertain what proportion of the daisies are white in order to calculate how many white daisies the florist was required to sell. One-fourth of the daisies are said to be white. In order to indicate the quantity of white daisies, we can use the fraction \frac{1}{4} .\frac{1}{4} * 72= 18 .

The florist thus has 18 white daisies for sale. The remaining daisies must be yellow if \frac{1}{4} of them are white. We must take the number of white daisies out of the overall number of daisies in order to determine how many yellow daisies there are.72 - 18= 54.

54 yellow daisies were therefore available for purchase at the florist.

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Answer:

It may leave some chemicals such as herbicides and pesticides in the water

Explanation:

i just took the test

Distillation may leave some chemicals such as herbicides and pesticides in the water. Therefore, option D is correct.

By using selective boiling and condensation, distillation, also known as traditional distillation, is the process of removing the constituents or compounds from a liquid mixture. The process of heating solid materials to create gaseous products is known as dry distillation.

A chemical is purified through distillation by being separated from a non-volatile or less-volatile substance. Because various compounds frequently have different boiling points, when a mixture is distilled, the components frequently separate from the mixture.

Among the many industrial uses of distillation are the production of alcoholic drinks, water purification, and oil refining. Distillation is a physical procedure that removes desired pure compounds from an initial source using heat and other techniques.

Thus, option D is correct.

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When the concentration of hydrogen gas  is increased, the reaction will shift toward the products right and increase the concentration of HI, to consume the increased concentration of H₂.

Chemical equilibrium is the state at which the rate of forward reaction and backward reaction takes place in the same rate. According to Le-chatlier principle, When any imbalance occurs by some factors to the equilibrium, the system itself balances the disorder and re-establish a new equilibrium state.

An increase in the concentration of reactants will shift the reaction to the forward direction. Similarly, if the product concentration is increased, then the reaction shifts to backward direction to produce reactants.

Here, H₂ is the reactant and increasing its concentration makes the reaction shifts to the direction which consumes H₂. Hence, the reaction will shift toward the products right increasing the concentration of HI.

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Answer:

Fermentation is where all alcohol is created, distillation is where the alcohol is separated and removed. In order for fermentation to occur, two things are needed: a raw material in liquid form that contains sugar, followed by the addition of yeast.

Answer:

To solve this question, we need to determine the mole ratio between HClO4 and H3PO4 based on the balanced chemical equation. The balanced equation is:

12 HCIO4 + P₂O10-4 → 4 H3PO4 + 6 Cl₂O

From the balanced equation, we can see that the mole ratio between HCIO4 and H3PO4 is 12:4, or simply 3:1. This means that for every 12 moles of HCIO4, 4 moles of H3PO4 are produced.

Given that there are 6.5 moles of HCIO4, we can use the mole ratio to determine the number of moles of H3PO4 produced.

Mole ratio: 3 moles of HCIO4 : 1 mole of H3PO4

6.5 moles of HCIO4 * (1 mole of H3PO4 / 3 moles of HCIO4) = 2.17 moles of H3PO4

Therefore, if there are 6.5 moles of HCIO4, approximately 2.17 moles of H3PO4 are produced.

Explanation:

It will take 173.6 years for the site to reach an acceptable level of radiation.

After the nuclear disaster in Russia, radioactive-iodine was found to be five times the maximum acceptable limit. Radioactive iodine decomposes into atoms of a more stable substance at a rate proportional to the amount of radioactive iodine present. The proportionality coefficient for radioactive iodine is about 0.004 per year.

We have to determine how long it will take for the site to reach an acceptable level of radiation.

Decay constant for radioactive iodine = 0.004 per year

We know that the radioactive iodine will decompose into more stable substance at a rate proportional to the amount of radioactive iodine present.

The formula used to calculate the decay of radioactive substance is given by:

N = N₀e^(-λt)

Where, N₀ is the initial number of radioactive nuclei

N is the number of radioactive nuclei after time tλ is the decay constant

t is the time passed

Thus, the formula for calculating the decay of radioactive iodine is given by:

N = N₀e^(-0.004t)

The acceptable level of radioactive iodine is considered as N = N₀/5

Putting N = N₀/5 in the formula, we have:

N₀/5 = N₀e^(-0.004t)

Simplifying the above equation, we get:

e^(-0.004t) = 1/5

Taking the natural log of both sides, we get:-0.004t = ln(1/5)

Solving the above equation for t, we get:

t = 173.6 years.

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Since the value of l is 0, the azimuthal quantum number is also 0. The value of the spin quantum number can be either +1/2 or -1/2. So the set of quantum numbers for the 4s orbital is 4, 0, 0, ½.

For the 4s electron, the four quantum number are

principal quantum number n = 4

Azimuthal quantum number l = 0 (since it is an s orbital)

magnetic quantum number ml = 0 (since l = 0

spin quantum number ms = +1/2 or -1/2

Atoms have four quantum numbers.

Principal quantum number (n), orbital angular momentum quantum number (l), magnetic quantum number (ml), electron spin quantum number (ms). 

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Answer:

there is an increase by 0.18 V in the cell voltage.

Explanation:

The given equation of the reaction can be well written as

\(2AgCl_{(s)} + Zn _{(s)} \to 2Ag_{(s)} + 2 Cl^- _{(aq)}+ Zn^{2+}_{(aq)}\)

By application of Nernst Equation ; we have the expression

\(E_{cell} = E^0- \dfrac{0,059}{n}log (\dfrac{[product]}{[reactant]})\)

here in the above equation;

n = number of electrons transferred in the equation of the reaction

n = 2

Also;

\(E^0 = E_{cathode} - E_{anode}\)

\(E^0 = E_{Ag^+/Ag} - E_{Zn^+/Zn}\)

\(E^0 = +(0.80 \ V) - (-0..76 \ V)\)

\(E^0 = (0.80 \ V +0..76 \ V)\)

\(E^0 = 1.56 \ V\)

If the zinc ion concentration is kept constant at 1 M; we have:

\(E_{cell} = E^0- \dfrac{0.059}{n}log (\dfrac{[product]}{[reactant]})\)

\(E_{cell} = 1.56 - \dfrac{0.059}{2}log ({[Zn^{2+} ]}{[Cl^{2-}]})\)

\(E_{cell} = 1.56 - \dfrac{0.059}{2}log (1)\)

Since log(1) = 0

Therefore;

\(E_{cell} = 1.56\ V\)

When the chlorine ion concentration is decreased from 1 M to 0.001 M; we have;

\(E_{cell} = E^0- \dfrac{0.059}{n}log (\dfrac{[product]}{[reactant]})\)

\(E_{cell} = 1.56 - \dfrac{0.059}{2}log ({[Zn^{2+} ]}{[Cl^{2-}]})\)

\(E_{cell} = 1.56 - \dfrac{0.059}{2}log ({[1*0.001^2}]})\)

\(E_{cell} = 1.56 - 0.0295 \ * \ log ({[1*10^{-6}}]})\)

\(E_{cell} = + 1.737 \ V\)

The change in voltage = \(E_{cell} - E^0\)

=( 1.737 - 1.56 )V

= 0.177 V

≅ 0.18 V

Thus; from the following observation; there is an increase by 0.18 V in the cell voltage.

The voltage of the cell increased by 0.18 V.

The equation of the reaction is; 2AgCl(s) + Zn(s) → 2Ag(s) + 2Cl– + Zn2+

We know that;

E°cell = 1.36 - (-0.76) = 2.12 V

If the cells are both at 1M concentration the Ecell = E°cell = 2.12 V

When the concentration of Cl- decreased from 1 M to 0.001 M

Ecell =  E°cell - 0.0592/n log Q

Substituting values;

Ecell = 2.12 V -  0.0592/2 log (1 × (0.001)^2)

Ecell = 2.298 V

Increase in voltage = 2.298 V - 2.12 V = 0.18 V

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Answer:

2.1056L or 2105.6mL

Explanation:

We'll begin by calculating the number of mole in 10g of Na2CO3. This can be obtained as follow:

Molar mass of Na2CO3 = (23x2) + 12 + (16x3) = 106g/mol

Mass of Na2CO3 = 10g

Mole of Na2CO3 =.?

Mole = mass /molar mass

Mole of Na2CO3 = 10/106

Mole of Na2CO3 = 0.094 mole

Next, we shall determine the number of mole CO2 produced by the reaction of 0.094 mole of Na2CO3. This is illustrated below:

Na2CO3 + 2HCl —> 2NaCl + H2O + CO2

From the balanced equation above,

1 mole of Na2CO3 reacted to produce 1 mole of CO2.

Therefore, 0.094 mole of Na2CO3 will also react to 0.094 mole of CO2.

Next, we shall determine the volume occupied by 0.094 mole of CO2 at STP. This is illustrated below:

1 mole of a gas occupy 22.4L at STP. This implies that 1 mole CO2 occupies 22.4L at STP.

Now, if 1 mole of CO2 occupy 22.4L at STP, then, 0.094 mole of CO2 will occupy = 0.094 x 22.4 = 2.1056L

Therefore, the volume of CO2 produced is 2.1056L or 2105.6mL

Answer:

Since the replication crisis, many practices have been implemented to improve research and promote open science, or the practice of sharing data and materials so they can be reviewed and replicated by other researchers. One of these practices involves submitting the proposed methods and analysis plan to journals in advance for approval or preregistration. This practice allows scientific journals to approve experiments before they are done, with the guarantee that any finding will be published regardless of whether or not it is significant. This process also prevents researchers from harking, or creating theories or hypotheses that explain the results of a study after the data has been collected.

Explanation:

The blanks in the text above were filled with the terms that best fit the context and meaning of the message that the text, in general, wanted to convey. No grammatical element and no punctuation has been modified, which allows the text to maintain its original coherence and meaning.

The added terms are in agreement with the scientific denominations currently accepted.

a. The relationship between carbon, hydrogen, and oxygen atoms from sugar molecules, formed in or ingested by an organism, can be seen in the formation of amino acids and other large carbon-based molecules.

b. Those same atoms of amino acids and other large carbon-based molecules are found in the structure of these molecules, particularly in their functional groups.

c. Larger carbon-based molecules and amino acids can be a result of chemical reactions between sugar molecules and other atoms in amino acids.

Sugar molecules are composed of carbon, hydrogen, and oxygen atoms in the ratio of 1:2:1. This means that they have a high number of carbon and hydrogen atoms compared to oxygen atoms. When ingested by an organism, these sugar molecules are used to produce energy for various cellular processes.

Amino acids, on the other hand, are the building blocks of proteins, which are essential macromolecules for life. Amino acids contain a central carbon atom, an amino group (-NH₂), a carboxyl group (-COOH), and a side chain or R-group. The R-group is what differentiates one amino acid from another and determines its properties.

The carbon, hydrogen, and oxygen atoms from sugar molecules are found in the structure of amino acids, particularly in their carboxyl and amino groups. For example, the carboxyl group of an amino acid has a carbon atom bonded to two oxygen atoms and a hydrogen atom. This is similar to the structure of a sugar molecule, which has a carbon atom bonded to two oxygen atoms and two hydrogen atoms.

In addition to amino acids, larger carbon-based molecules can also be formed from sugar molecules through chemical reactions. For example, polysaccharides such as starch and glycogen are formed from the condensation of many glucose molecules. Lipids such as fats and oils are also formed from the reaction of glycerol and fatty acids.

Overall, the relationship between carbon, hydrogen, and oxygen atoms from sugar molecules is essential for the formation of many other macromolecules in living organisms, including amino acids and larger carbon-based molecules. These molecules are formed through chemical reactions between sugar molecules and other atoms, leading to the creation of new functional groups and properties.

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Answer:

the answer is a please check

Answer:

B! Hope this helps! :)

Explanation:

The molarity of the KMnO4 solution is 0.532 M (rounded to three decimal places).

To calculate the molarity of the KMnO4 solution, we need to use the stoichiometry of the reaction and the volume of the KMnO4 solution used in the titration.

Given:

Mass of H2O2 solution = 1.0 g

Concentration of H2O2 solution = 30 wt% (weight percent)

Volume of KMnO4 solution used = 22.143 mL

Molar mass of H2O2 = 34.01 g/mol

Step 1: Calculate the moles of H2O2 in the solution.

Moles of H2O2 = (Mass of H2O2 solution) / (Molar mass of H2O2)

= 1.0 g / 34.01 g/mol

= 0.0294 mol

Step 2: Calculate the moles of KMnO4 based on the stoichiometry of the reaction.

According to the balanced equation, the ratio of KMnO4 to H2O2 is 2:5.

Therefore, moles of KMnO4 = (Moles of H2O2) * (2/5)

= 0.0294 mol * (2/5)

= 0.01176 mol

Step 3: Calculate the molarity of the KMnO4 solution.

Molarity (M) = (Moles of KMnO4) / (Volume of KMnO4 solution in liters)

= 0.01176 mol / 0.022143 L

= 0.5316 M

Therefore, the molarity of the KMnO4 solution is 0.532 M (rounded to three decimal places).

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