You Previously Determined that a particular sealed container holds 0.261 mol CO2 gas. What mass of NaHCO3 is needed to generate the CO2?

Answer:

224.1

Explanation:

Answer:

1: Na

Explanation:

Out of the four elements, the most reactive element is sodium (Na).

Sodium is a highly reactive metal because it has only one valence electron in its outermost shell, which is relatively far from the positively charged nucleus. This makes it easy for sodium to lose its outermost electron and form a positively charged ion, which is why it readily reacts with other elements.

Aluminum (Al), rubidium (Rb), and indium (In) are also reactive metals, but they are less reactive than sodium.

Answer:

yes

Explanation:

due to gravity &hggggggggg%ggghhbvvvghh

Answer:

The correct answer is option C.

Explanation:

The pH of the solution with weak acid and its conjugate base is given by the Henderson-Hasselbalch equation:

\(pH=pK_a+\log[\frac{[A^-]}{[HA]}]\)

Where:

\(pK_a\)= The negative logarithm of the dissociation constant of a weak acid

\([A^-]\)= Concentration of conjugate base of a weak acid

\([HA]\)= Concentration of weak acid

We are given a solution with acetic acid and acetate ion.

\(HAc(aq)\rightleftharpoons H^+(aq)+Ac^-(aq)\)

The concentration of acetic acid in a solution= \([HAc]=0.2M\)

The concentration of acetate ion in a solution = \([Ac^-]=0.35M\)

The pK_A of the acetic acid = \(pK_a=4.8\)

The pH of the solution:

\(pH=4.8+\log[\frac{0.35 M}{0.2M}]=5.04\)

5.04 the pH of a solution of 0.2M acetic acid and 0.35M acetate ion.

Hence, the correct answer is option C.

A) Keep temperature constant and increase the pressure of the reaction; reaction rate will increase.

The temperature and pressure of a reaction will affect the rate of reaction.

Pressure

Pressure and the rate of reaction have a direct relationship. This means that as one increases, so does the other. So, if the pressure increases. then the rate of reaction will also increase. This is due to the number of collisions. As pressure increases, the number of collisions between molecules increases. This causes the reaction to occur faster. Thus, the rate of reaction increases.

Temperature

Kinetic energy and temperature are proportional. This means that as temperature increases, so does kinetic energy. This leads to temperature and rate of reaction also having a direct relationship. So, temperature and rate of reaction increase and decrease together. This is due to the fact that when temperature increases, the energy of the molecules increases. This leads to an increased number of collisions. As stated above, more collisions lead to a faster reaction.

Answer:

you need to state the options

Answer:

An atom is the smallest particle of an element that still has the properties of that element. Atoms, in turn, are composed of subatomic particles, including negative electrons, positive protons, and neutral neutrons. The number of protons in an atom determines the element it represents.

Explanation:

The smallest possible particle of an element is a atom. The remainder is made up of a cloud of negatively charged electrons around a positively charged nucleus made up of protons and neutrons.

The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. Electric forces, which link electrons towards the nucleus of atoms, cause them to be drawn to any positive charge.

Space makes up the majority of an atom. The remainder is made up of a cloud of negatively charged electrons around a positively charged nucleus made up of protons and neutrons. Compared to electrons, that are the smallest charged particles in nature, the nucleus is tiny and dense.  

Therefore, the smallest possible particle of an element is a atom.

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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 decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).

The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:

\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)

From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.

Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.

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Answer:

+1

Explanation:

Answer:

I can't see any picture?????

Answer:

all living things need water. no water, no life.

Answer:

Molarity = 0.3 M

Explanation:

Given data:

Moles of NaOH = 0.720 mol

Volume of water = 2.40 L

Molarity = ?

Solution:

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

Molarity = 0.720 mol / 2.40 L

Molarity = 0.3 mol/L

Molarity = 0.3 M

The best inference Tara can draw about the commercial is the fact that it is making pseudoscientific claims based on opinions rather than scientific evidence, according to the message at the bottom of the screen.

The claims claimed in the commercial are not supported by scientific data and may be exaggerated or inaccurate because the pill has not been examined by physicians and has not been put through rigorous testing. Therefore, before making any judgements regarding the use of the product, it is crucial to exercise caution and skepticism towards the assertions made in such advertising and to look for trustworthy sources of information.

Therefore, the correct option is D.

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Your question is incomplete, most probably the complete question is:

Tara sees a commercial for a brand of pills that promise to boost energy and help people perform better in work and school. As people in the commercial talk about how much better they feel when taking the pill, Tara notices a message on the bottom of the screen that reads, "This pill is not approved by doctors and has not been tested in controlled experiments." What is the best conclusion that Tara should make about the commercial?

The partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg (calculated by subtracting the partial pressure of water, 17.0 mm Hg, from the total atmospheric pressure, 750.0 mm Hg).

When a gas is collected over water, the presence of water vapor affects the total pressure observed. In this case, the total atmospheric pressure is given as 750.0 mm Hg, and the partial pressure of water vapor at 19.5°C is 17.0 mm Hg.

To determine the partial pressure of hydrogen, we need to subtract the partial pressure of water vapor from the total atmospheric pressure. Partial pressure refers to the pressure exerted by an individual gas component in a mixture. In this scenario, the collected gas is primarily hydrogen, with water vapor being the other component.

By subtracting the partial pressure of water vapor (17.0 mm Hg) from the total atmospheric pressure (750.0 mm Hg), we can find the partial pressure of hydrogen:

Partial pressure of hydrogen = Total atmospheric pressure - Partial pressure of water vapor

Partial pressure of hydrogen = 750.0 mm Hg - 17.0 mm Hg

Partial pressure of hydrogen = 733.0 mm Hg

Therefore, the partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg.

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Answer:

Mole = molecular weight / molecular mass

Mole = 16/16

Mole= 1

The molar mass of MgCrO4 is approximately 140.30 g/mol.

To determine the molar mass of MgCrO4 (magnesium chromate), we need to calculate the sum of the atomic masses of each individual element in the compound.

The chemical formula MgCrO4 indicates that the compound consists of one magnesium atom (Mg), one chromium atom (Cr), and four oxygen atoms (O).

The atomic masses of the elements can be found on the periodic table:

Magnesium (Mg) has an atomic mass of approximately 24.31 g/mol.

Chromium (Cr) has an atomic mass of around 51.99 g/mol.

Oxygen (O) has an atomic mass of about 16.00 g/mol.

Now, we can calculate the molar mass of MgCrO4 by summing up the atomic masses of each element, considering the respective subscripts:

Molar mass = (Atomic mass of Mg) + (Atomic mass of Cr) + 4 × (Atomic mass of O)

Molar mass = (24.31 g/mol) + (51.99 g/mol) + 4 × (16.00 g/mol)

Molar mass = 24.31 g/mol + 51.99 g/mol + 64.00 g/mol

Molar mass ≈ 140.30 g/mol

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Answer:

Ions are formed when the number of protons in an atom does not equal the number of electrons. If more protons are present, the ion is positive and is known as a cation; if more electrons are present, the ion is negative and referred to as an anion. Ions are highly reactive species.

Explanation:

Answer:

An atom becomes charged when the number of protons does not equal the number of electrons. For example, if an element has six protons but only five electrons, the net charge of the element is +1. Conversely, if an element has six protons but seven electrons, then the net charge of the element is -1.

Explanation:

Answer: 380 J. Please mark

Explanation:

Answer:

In food systems, the continuous phase is usually a liquid with added solids or  beaten egg white and sugar foam is a gas in the liquid dispersion. ... egg white foam is an example of this. air bubbles (disperse phase are ... a colloid is a type of chemical mixture where one substance is dispersed evenly throughout.

Explanation:

The dot electron structure of the sodium chloride has been shown in the image attached.

We know that the dot electron structure of a compound has to do with the way that electrons are arranged around the valence shells of the elements that are in the compound. We know that in the dot electron structure, we have to show the symbol of the element and then the electrons that surround the outermost shells of the atom as dots.

Sodium chloride is an ionic compound as such it is composed of sodium ion and the chloride ion and the electrons that are found in each of the ions can be shown in the Lewis dot structure of the compound which is seen in the image that has been attached here. The chloride ion has eight electrons while the sodium ion has no electron.

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Key differences between Mass and Weight

The weight may vary, but the mass is constant.

The mass is measured in kilograms (kg), while the weight is measured in newtons (N).

Mass refers to the amount of matter an object has, but the weight refers to the force of gravity acting on an object.

Answer:

C. Academic English

Explanation:

just a side note, it'd be alot easier if you put the answers like this:

A. Urban English

B. Standard English, and et

Explanation:

Answer: c????????

Explanation:

The first condition or the first travel (Alaska) will be have more thermodynamics property.

Gray whales travel 12,000 miles round-trip from their feeding grounds in the Arctic to calve and breed in the Baja lagoons, and then they return. This migration is one of the longest that any mammal makes each year. That is equivalent to crossing the country three times, from San Francisco, California, to Washington, D.C.

Although some whales are spotted further south during this period, even in California, gray whales spend their summers feeding in the nutrient-rich seas of the Arctic. Gray whales consume microscopic creatures that reside in the sediment of the seafloor, typically amphipods. Gray whales favor the left and right sides just like people do! Gray whales move down the ocean floor on their sides while feeding, using their baleen to separate their food from the sand. By examining the whale's head, one can establish which side is preferred: it prefers the side with less barnacles and signs of skin scraping.

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The pressure inside the tire is approximately 1.970796 newtons per square centimeter (N/cm²) when measured in those units.

To convert the pressure from pounds per square inch (psi) to newtons per square centimeter (N/cm²), we need to use the conversion factors between these units.

First, let's convert pounds to newtons:

1 pound = 0.45359237 kilograms

1 kilogram = 9.80665 newtons

Next, let's convert square inches to square centimeters:

1 square inch = 6.4516 square centimeters

Now, we can perform the conversion:

1 psi = (0.45359237 kg) × (9.80665 N/kg) / (6.4516 cm²)

≈ 0.070307 N/cm²

Therefore, the pressure inside the tire of 28.0 psi is approximately equal to 28.0 × 0.070307 N/cm², which is approximately 1.970796 N/cm².

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The intermolecular force between bromine and benzene is primarily a van der Waals force known as London dispersion forces.

London dispersion forces occur due to temporary fluctuations in electron distribution, creating temporary dipoles in molecules. In the case of bromine and benzene, both molecules are nonpolar, meaning they have no permanent dipole. However, they still experience London dispersion forces.

Benzene is a cyclic aromatic hydrocarbon with a hexagonal ring structure. It consists of delocalized π electrons above and below the plane of the molecule. Bromine is a halogen element with seven valence electrons, which forms diatomic molecules. In the solid or liquid state, bromine molecules exist as Br2.

The London dispersion forces between bromine and benzene arise from the temporary shifts in electron density within their electron clouds. The π electrons in benzene induce temporary dipoles in the bromine molecules, resulting in attractive forces between them. These temporary dipoles continuously form and break due to electron movements, resulting in an overall attractive force between the bromine and benzene molecules.

While London dispersion forces are generally weaker than other intermolecular forces like dipole-dipole interactions or hydrogen bonding, they still contribute to the stability of the system and affect properties such as boiling points and melting points.

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The chemical equation is

\(\rm Ca(NO_ 3)_2 (aq) + 2KCl (aq) \rightarrow CaCl_2 + 2KNO_3\)

Chemical equation is defined as a symbolic representation of a chemical reaction in the form of symbols, in which the reactants and products are expressed in terms of their respective chemical formulas. It can also be called as chemical reactions.

There are basically six types of chemical reactions.

Thus, the chemical equation is

\(\rm Ca(NO_ 3)_2 (aq) + 2KCl (aq) \rightarrow CaCl_2 + 2KNO_3\)

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the cell potential for the given galvanic cell is +3.16 V at 25°C. This means that the reaction is strongly favored to occur spontaneously in the direction written, from left to right.

To calculate the cell potential for the given galvanic cell, we need to use the standard reduction potentials of the two half-reactions involved in the cell reaction. From the table of standard reduction potentials, we can find the following half-reactions:

Al³+ (aq) + 3e⁻ → Al(s) E°red = -1.66 V

Au³+ (aq) + 3e⁻ → Au(s) E°red = +1.50 V

To obtain the overall cell potential, we can use the equation:

E°cell = E°reduction (cathode) - E°reduction (anode)

where the cathode is the half-cell where reduction occurs and the anode is the half-cell where oxidation occurs. In this case, we can see that Au³+ is reduced to Au(s) (cathode) and Al(s) is oxidized to Al³+ (anode).

Therefore, we can calculate the cell potential as follows:

E°cell = E°red (Au³+ → Au) - E°red (Al → Al³+)

= (+1.50 V) - (-1.66 V)

= +3.16 V

Thus, the cell potential for the given galvanic cell is +3.16 V at 25°C. This means that the reaction is strongly favored to occur spontaneously in the direction written, from left to right.

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