Where are the instructions that tell the cell everything it needs to survive?


mitochondrion


nucleolus


endomembrane system


ribosome

Answer:

Mn

Explanation:

The cation in the chemical formula MnSe is the Mn specie.

Answer:

They both have 7 electrons in their outer shell

There were 0.166 moles of oxygen, O, in the sample.

Given:

The unknown compound with a mass of 5.00 grams.

In 5.00 grams of compound contained 0.167 moles of C and 0.333 moles of hydrogen.

To find:

The moles of oxygen in 5.00 grams of an unknown compound.

Solution:

Moles of carbon in 5.00 grams of compound = 0.167 mol

Mass of carbon in 5.00 grams :

\(=0.167 mol\times 12.0107 g/mol=2.01 g\)

Moles of hydrogen in 5.00 grams of compound = 0.333 mol

Mass of hydrogen in 5.00 grams :

\(= 0.333 mol\times 1.00784 g/mol=0.336 g\)

Mass of oxygen in 5.00 grams of compound:

\(= 5.00 g - 2.01 g - 0.336 g = 2.654 g\)

Moles of oxygen in 2.654 g :

\(=\frac{2.654 }{15.999 g/mol} \\\\=0.1658 mol\approx 0.166 mol\)

There were 0.166 moles of oxygen, O, in the sample.

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Taking into account definition of percent yield, the percent yield for the reaction is 54.22%.

In first place, the balanced reaction is:

CH₄+ 2 O₂ → CO₂ + 2 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 16 grams of CH₄ form 36 grams of H₂O, 5 grams of CH₄ form how much mass of H₂O?

mass of H₂O= (5 grams of CH₄×36 grams of H₂O) ÷16 grams of CH₄

mass of H₂O= 11.25 grams

Then, 11.25 grams of H₂O can be produced when you burn 5.00 g of methane

The percent yield is the ratio of the actual return to the theoretical return expressed as a percentage.

The percent yield is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:

percent yield= (actual yield÷ theoretical yield)× 100

where the theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.

In this case, you know:

Replacing in the definition of percent yields:

percent yield= (6.10 grams÷ 11.25 grams)× 100

Solving:

percent yield= 54.22%

Finally, the percent yield when methane reacts with oxygen to form carbon dioxide and water is 54.22%.

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The element nitrogen exists as a gas  and is  obtained from air on a large scale​ by fractional distillation of air.

An element is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.

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The container will expand to 4.0 L when it holds 2.4 moles of the same gas.

To answer your question, we will use the concept of Avogadro's law, which states that the volume of a gas is directly proportional to the number of moles (n) of the gas when the temperature and pressure remain constant.

Mathematically, it can be represented as:
V1/n1 = V2/n2

where,

V1 and n1 = initial volume and moles of the gas

V2 and n2 = final volume and moles of the gas

Given the initial conditions,

V1 = 3.0 L

n1 = 1.8 moles

The final condition,

n2 = 2.4 moles.

To find V2, Using the given values and rearranging the formula, we have:

V2 = V1 * (n2/n1)

V2 = 3.0 L * (2.4 moles / 1.8 moles)

V2 = 3.0 L * (1.3333)

V2 = 4.0 L

So, when the container holds 2.4 moles of the same gas, it will expand to a volume of 4.0 L. This is because the number of moles of the gas has increased, and according to Avogadro's law, the volume must also increase proportionally to maintain a constant temperature and pressure.

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There are several physical methods that can be used to monitor the rate of a chemical reaction are; Spectrophotometry, Conductometry, and Turbidity measurement

Spectrophotometry involves measuring the changes in the intensity of light absorbed or transmitted by a solution during a chemical reaction. Spectrophotometers are used to measure the amount of light absorbed or transmitted by a sample at different wavelengths.

Conductometry  involves measuring the changes in electrical conductivity of a solution during a chemical reaction. Conductivity meters are used to measure the electrical conductivity of a solution, which can change as the concentration of ions in the solution changes during a chemical reaction.

Turbidity measurement involves measuring the changes in the clarity or turbidity of a solution during a chemical reaction. Turbidimeters or nephelometers can be used to measure the amount of light scattered by a sample, which can change as particles form or dissolve during a reaction.

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--The given question is incomplete, the complete question is

"What are the physical methods of monitoring the rate of a chemical reaction?"--

This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97. The incorrect representation for a neutral atom is 36Li

To determine the correct representation for a neutral atom, we need to consider the atomic number (Z) and mass number (A) of the element. The atomic number represents the number of protons in the nucleus, while the mass number represents the sum of protons and neutrons.

Let's analyze the given representations:

36Li:

This representation suggests that the element is lithium (Li) with a mass number of 36, which is incorrect. The correct mass number for lithium is approximately 6.94.

613C:

This representation suggests that the element is carbon (C) with a mass number of 13, which is correct. Carbon has different isotopes, and 13C represents one of its stable isotopes.

3063Cu:

This representation suggests that the element is copper (Cu) with a mass number of 63, which is correct. Copper has different isotopes, and 63Cu represents one of its stable isotopes.

1530P:

This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97.

Therefore, the incorrect representation for a neutral atom is 36Li, as it does not match the known properties of lithium.

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The mass (in grams) of chlorine gas is needed to react with 251 grams of iron is 479 grams. Option C.

To determine the mass of chlorine gas needed to react with 251 grams of iron, we need to use the stoichiometry of the balanced chemical equation:

2Fe + 3Cl2 → 2FeCl3

From the balanced equation, we can see that 2 moles of iron (Fe) react with 3 moles of chlorine gas (Cl2) to produce 2 moles of iron(III) chloride (FeCl3).

To calculate the mass of chlorine gas, we can follow these steps:

Step 1: Convert the given mass of iron (Fe) to moles.

Using the molar mass of iron (Fe), which is approximately 55.85 g/mol, we can calculate the number of moles of iron:

moles of Fe = mass of Fe / molar mass of Fe

moles of Fe = 251 g / 55.85 g/mol

moles of Fe ≈ 4.5 mol (rounded to one decimal place)

Step 2: Use the mole ratio from the balanced equation to find the moles of chlorine gas (Cl2) needed.

From the balanced equation, we know that 2 moles of Fe react with 3 moles of Cl2. Therefore, the moles of Cl2 can be calculated as:

moles of Cl2 = (moles of Fe / 2) * 3

moles of Cl2 = (4.5 mol / 2) * 3

moles of Cl2 ≈ 6.75 mol (rounded to two decimal places)

Step 3: Convert the moles of chlorine gas to grams.

Using the molar mass of chlorine gas (Cl2), which is approximately 70.90 g/mol, we can calculate the mass of chlorine gas:

mass of Cl2 = moles of Cl2 * molar mass of Cl2

mass of Cl2 = 6.75 mol * 70.90 g/mol

mass of Cl2 ≈ 479 grams (rounded to the nearest whole number) Option C is correct.

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The mass percentage is an important method which is used to calculate the concentration of a solution. The amount of water needed to add in order to make 17.85 % NaCl solution is 230.1 g.

The mass percentage of a component in a solution is defined as the mass in grams of that component present per 100 g of the solution. The term mass percentage is denoted as w/w. It is used to calculate the concentration of a binary solution.

Mass percentage = Mass of the component in the solution / Total mass of solution × 100

17.85 = 50.0 / 50.0 + x × 100

0.1785 (50.0 + x) = 50.0

8.925 + 0.1785 x = 50.0

0.1785 x = 41.075

x = 230.1 g

Thus the amount of water added to make the solution is 230.1 g.

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There are actually no disproportionation reaction in the question. They are all incomplete and unbalanced.

Example of a disproportionate reaction:

For this reaction the chlorine atom on the reactant side as an oxidation state of 0. It gets reduced to -1 in Cl- and oxidized to +1 in ClO3-

we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

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The first reaction is a first order reaction and the unit of rate constant is s⁻¹. The second one is also a first order reaction with the same unit. Third one is a third order reaction with the unit for k as L² mol⁻² s⁻¹.

Rate of a reaction is the rate of decrease in concentration of the reactants or increase in concentration of the products. The rate is directly proportional to the concentration of reactants and the rate law is written as:

rate = k [reactants]

where, the proportionality constant k is called the rate constant.

The order of a reaction is the sum of powers of the molar concentration of reactants. Thus, each reaction vary in order and the order of reaction also depends on the steps in the reaction.

The general formula of the unit of rate constant is L⁽ⁿ⁻¹⁾ mol⁽¹⁻ⁿ⁾ s⁻¹. Hence,  first reaction is a first order reaction and the unit of rate constant is s⁻¹. The second one is also a first order reaction with the same unit.

Third one is a third order reaction with the unit for k as L² mol⁻² s⁻¹. The fourth one is a second order reaction. Thus, unit of rate constant is L mol⁻¹ s⁻¹.

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Answer:

Rise in charge reduced the size due to rise in attraction between electron and nucleus.

Explanation:

Ion of magnesium is smaller than the atom of magnesium. As the nuclear charge increases, the attraction of electron to the nucleus increases in charged ions form of any element. Due to this increase in charge of magnesium ion,  the size of ion reduces

No. of electrons in Mg = 12

No. of proton in Mg = 12

Where as

No. of electrons in Mg2+ = 12

No. of proton in Mg2+ = 10

The 3D structure of R- CFClBrI is drawn using wedges and dotted line with I in the top and F right to I and Fischer projection is drawn using lines for bonds where C is placed at center and I in the top with F right to it.

An enantiomer is a spatial isomer of a compound having different spatial configuration but the same formula. Enantiomers are non-superimposable mirror images of each other.

In  R- enantiomer, the elements are arranges in a way that on numbering in clockwise direction, the priority of group decreases from 1 to 2 to 3 and follows. The highest priority group is numbered first.

If the count 1..2..3 goes in anti-clockwise direction, then the enantiomer is termed as S.  In 3D projection, wedges and dotted lines are used for representing bonds.

In Fischer projection, lines are used for bonds as shown in the uploaded image. Where the chiral carbon is shown in center and other groups are allotted as per the R or S configuration.

Therefore, the 3D image and Fischer projection of CFClBrI is drawn as in the image uploaded.

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The concentration of the HNO₃ solution needed to neutralize the 27.60 mL of 1.00 M NaOH is 2.76 M

The balanced equtaion is given below:

HNO₃ + NaOH —> H₂O + NaNO₃

Now, we shall obtain the concentration of the HNO₃ solution needed for the neutralization reaction. This is shown below:

CaVa / CbVb = nA / nB

(Ca × 10) / (1 × 27.6) = 1

(Ca × 10) / 27.6 = 1

Cross multiply

Ca × 10 = 27.6

Divide both side by 10

Ca = 27.6 / 10

Ca = 2.76 M

Thus, the concentration of the HNO₃ solution needed is 2.76 M

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The Correct electron configuration of carbon as 1s² 2s² 2p². Option B.

To understand why this is the correct electron configuration, let's break it down step by step:

The atomic number of carbon is 6, which means it has six electrons. Electrons are distributed in energy levels or shells around the nucleus.

The first shell, known as the 1s orbital, can hold a maximum of 2 electrons. Therefore, the first part of the electron configuration is 1s², indicating that two electrons occupy the 1s orbital.

The second shell has two subshells: the 2s orbital and the 2p orbital. The 2s orbital can hold a maximum of 2 electrons, while the 2p orbital can hold a maximum of 6 electrons. In the case of carbon, after the 1s orbital, two more electrons occupy the 2s orbital. So far, we have 1s² 2s².

The remaining two electrons in carbon are placed in the 2p orbital. The 2p orbital consists of three separate p orbitals: 2px, 2py, and 2pz. Each p orbital can hold a maximum of 2 electrons. Therefore, the last part of the electron configuration for carbon is 2p², indicating that two electrons occupy the 2px and 2py orbitals. Option B is correct.

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Answer:

pue like ad

Explanation:

For the two pure substance that you cannot identified , The steps taken in the right sequence are:

Pure substance are regarded as substance that does not have impurities. one common way of finding out the purity of a substance is by its melting and boiling point determination.

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Answer:

Radiation is energy that comes from a source and travels through space at the speed of light.

Explanation:

Radiation is energy that comes from a source and travels through space at the speed of light. This energy has an electric field and a magnetic field associated with it and has wave-like properties. You could also call radiation “electromagnetic waves”

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Step 1 - Relating concentration, volume and number of moles

The definition of molar concentration (M) is the quotient between the number of moles (n) and the total volume of the solution (V). We can state it in a mathetical way as:

We can now rearrange this equation to obtain the number of moles, n:

We'll use this relation to solve this exercise.

Step 2 - Finding the number of moles of NaOH

The concentration of the solution is 2.2 M and its volume is 0.065 L (65 ml). Therefore:

There are thus 0.14 moles of NaOH in 65 ml of this solution.

Answer:

OC. The potential energy lost by the reaction system (C) is gained by

the surroundings.

Explanation:

The potential energy lost by the reaction system (C) is gained by the surroundings. Therefore, the correct option is option C.

Energy is the ability to perform work in physics. It could exist in several different forms, such as potential, kinetic, thermodynamic, electrical, chemical, radioactive, etc. Moreover, there is heat and work, which is energy being transferred through one body to the other. Energy is always assigned based on its nature once it has been transmitted.

Motion is a property of all energy types. For instance, if a body is moving, it possesses kinetic energy. Even while at rest, a tensioned object like a spring or bow has the ability to move; this is because of its design, which includes potential energy. The potential energy lost by the reaction system (C) is gained by the surroundings. This explains how energy is conserved during this chemical reaction.

Therefore, the correct option is option C.

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Explanation:

hdhehdbrhdns dhdjdjdhrjs dhfirjr rudjdbe dbdud d

Answer:

Matter can change from one state to another if heated or cooled. If ice (a solid) is heated it changes to water (a liquid). This change is called MELTING. If water is heated, it changes to steam (a gas).

Explanation:

The substance which is boiled at 40° is not water because water boils at 100° C.

The temperature at which a liquid's vapors equals the pressure of the gas above it is known as the boiling point of the liquid. The temperature at which a liquid's vapor pressure equals one atmosphere is considered the liquid's normal boiling point (760 torr). view from a distance of a bubble in boiling water.

The lowest boiling point of all is for liquid helium, which is around -452 degrees Fahrenheit or 4.2 degrees Celsius above absolute zero. Despite the fact that these substances are referred to as gases, it's crucial to keep in mind that only at a certain temperature can a substance be classified as a "gas" or a "liquid."

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Answer:

They have the same number of protons. Scientists are working wit a liquid that is made of only one type of atom.

GOOD LESSONS ♡

Answer:

2 H2 + O2 --->  2 H2O

Explanation:

Amount in the beginning:

- Left side : 2 H and 2 O

- Right side: 2H and 1 O

You need the same amount of H en O on each side. You are missing 1 O on the right side, so you add another one by placing 2 infront of O on the left side. Now the O is balenced.

The H is out of balance now. You have 4 on the right side and 2 on the left side. So you add 2 H on the left side, by putting a 2 ahead of H2. Now you have 4H in total on the left and on the right side. The reaction is now balenced.

A pH of 4 is ten times more acidic than a pH of 5.

Yes, pH can have decimal values. In fact, pH values can range from 0 to 14 and can have any value between them including decimals. pH is a measure of the acidity or alkalinity of a solution, and it is determined by the concentration of hydrogen ions (H+) in the solution.A solution with a pH of 7 is neutral, which means that it has an equal concentration of hydrogen ions (H+) and hydroxide ions (OH-). An acidic solution has a pH below 7 and a high concentration of H+ ions. On the other hand, an alkaline solution has a pH above 7 and a low concentration of H+ ions.A pH that is less than 7.0 indicates acidity. pH less than 7.0 is acidic while pH greater than 7.0 is alkaline. Each number on the pH scale represents a ten-fold change in the acidity/alkalinity of the solution. For example, a pH of 5 is 10 times more acidic than a pH of 6, and 100 times more acidic than a pH of 7.A pH of 0 indicates a very strong acidic solution while a pH of 14 indicates a very strong alkaline solution. It's worth noting that pH is a logarithmic scale, meaning that a change of one pH unit corresponds to a ten-fold change in hydrogen ion concentration.

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The equilibrium constant for the reaction is : Kc = [CO₂][H₂O] / [Na₂CO₃][NaHCO₃]².

The equilibrium constant describes the extent of the reaction at equilibrium.

Given reaction is an example of reversible reaction, meaning that the products can react to reform the reactants. Equilibrium constant, denoted as Kc, describes the extent of the reaction at equilibrium, and is given by:

Kc = [CO₂][H₂O] / [Na₂CO₃][NaHCO₃]²

The value of Kc depends on the temperature of the system and other conditions such as pressure. At room temperature, Kc for this reaction is approximately 0.14, indicating that the products (CO₂ and H₂O) are favored over the reactants (Na₂CO₃ and NaHCO₃) at equilibrium.

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