what is the concentration (m) of ch3oh in a solution prepared by dissolving 34.4 g of ch3oh in sufficient water to give exactly 230 ml of solution? group of answer choices 11.9 5.31 1.59 4.67 0.00159

Answer:

When hydrochloric acid comes into contact with calcium carbonate, the following chemical reaction ensues: CaCO3 + 2HCl → CaCl + CO2 + H2O, which provides acid neutralization alongside the formation of byproducts

Answer:

C) liquid

Explanation:

edge 2023

2Al(OH)\(_3\)+3H\(_2\)SO\(_4\) → Al\(_2\)(SO\(_4\))\(_3\) +6 H\(_2\)O is the balanced equation. In other words, each component of the reaction have an equal balance of mass and charge.

An equation per a chemical reaction is said to be balanced if both the reactants plus the products have the same number of atoms and total charge for each component of the reaction. In other words, each component of the reaction have an equal balance of mass and charge.

The components and outcomes of a chemical reaction are listed in an imbalanced chemical equation, but the amounts necessary to meet the conservation of mass are not specified.

Al(OH)\(_3\)+H\(_2\)SO\(_4\) → Al\(_2\)(SO\(_4\))\(_3\) + H\(_2\)O

Firstly balance Al by multiplying by 2 on reactant side

2Al(OH)\(_3\)+H\(_2\)SO\(_4\) → Al\(_2\)(SO\(_4\))\(_3\) + H\(_2\)O

Now balancing sulfur, hydrogen and oxygen, the balanced equation is

2Al(OH)\(_3\)+3H\(_2\)SO\(_4\) → Al\(_2\)(SO\(_4\))\(_3\) +6 H\(_2\)O

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Answer:

Tin is an element. (Sn)

In Chemistry, we always have to balance the equations, in many topics within the subject of Chemistry, it is required to do that, this is because we have to account for every atom in the reaction, on both sides, reactant and product, the same number of atoms that are on the reactants side must be on the products side. Therefore, the best answer for this question will be letter D

There are 17.97 moles of calcium chloride would react with 5. 99 moles of aluminum oxide .

The balanced chemical equation between  reaction between calcium chloride and aluminum oxide is given as,

\(3CaCl_{2} (aq)+Al_{2} O_{3} (s)\) → \(3CaO_{2} (s)+2Al Cl_{3} (aq)\)

The molar ratio of above reaction is  3:1

It means 3 moles of calcium chloride is require to react one mole of aluminum oxide.

The number of moles of calcium chloride requires to react with  5. 99 moles of  aluminum oxide  = 3 × 5. 99 = 17.97 moles

The equation in which number of atoms of elements in reactant side is equal to the number of atoms of elements in product side is called balanced chemical equation .

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Answer:

0.659 mol

Explanation:

n(NH3)/n(N2) = 4/5

n(NH3) = 4/5×0.824

= 0.659 mol

The balanced equation in which ammonia reacts with nitrogen monoxide to produce nitrogen and water. 4NH3(g) + 6NO(g) → 5N2(g) + 6H2O. 0.659 moles of NH3 are necessary to produce 0.824 mol N2.

The term balanced chemical equation is defined as  has number atoms of each element equal on both left and right sides of the reaction.

The chemical equation must be balanced in order to obey the law of conservation of mass. When the number of different atoms of elements in the reactants side equals the number of atoms in the products side, the chemical equation is balanced.

The balanced chemical equation is as follows:

4NH3(g) + 6NO(g) → 5N2(g) + 6H2O

n (NH3) / n(N2) = 4 / 5

n (NH3) = 4 / 5 × 0.824

= 0.659 mol

Thus, 0.659 moles of NH3 are necessary to produce 0.824 mol N2.

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Action potentials are generated at the axon hillock and are conducted along the axon.

The axon hillock is the region of the neuron where the axon originates from the cell body. It is responsible for integrating the incoming signals from the dendrites and initiating the action potential. Once the action potential is initiated, it travels down the axon, which is a long, slender projection of the neuron. The axon is insulated by the myelin sheath, which helps to increase the speed of conduction.

At the end of the axon, the action potential reaches the terminal buttons, which are small knobs that release neurotransmitters into the synapse, a gap between neurons. From there, the neurotransmitters can bind to receptors on the dendrites of the next neuron, initiating a new round of electrical activity. The glial membrane surrounds both the axon and dendrite, providing support and insulation for the neuron.

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Answer:

The mass of the liquid = 162 g

Explanation:

As we know ,  

Q = mc (ΔT)

where Q = Heat energy of the liquid

c = specific heat of the liquid

ΔT = change in temperature

m = mass of the liquid

As given , the temperature increases from 20.°C to 33°C,

⇒ ΔT = 33 - 20 = 13°C

Also given , c = 0.57 cal/g°C

                   Q = 1200 cal

∴ we get

1200 = (m)(0.57)(13)

⇒ 1200 = m(7.41)

⇒m = \(\frac{1200}{7.41}\) = 161.943 ≈ 162 g

So, we get

The mass of the liquid = 162 g

Answer:

compound is formed .............

When different elements react, their atoms join with other atoms. A substance that is formed is called a compound.

An element is a variety of atoms that consists of a pure substance as well as a proper amount of proton atoms embedded in their nucleus.

In the field of chemistry, a mixture is a concoction of two or more unrelated chemical constituents. A mixture is a physical combination of two or more components in which their distinct identities are maintained. Solutions, suspensions, and colloids can all be considered to be mixtures.

Compounds are groups of two or more distinct elements that are chemically bonded together. Chemical bonds hold the compound together. A compound cannot be physically separated from another compound, and it cannot be determined whether a compound is present in a combination.

Thus, a compound will be formed by the joining of atoms.

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The molecular formula of a compound that contains 30.4 grams of nitrogen and 69.6 grams of oxygen and has a molar mass of 89 grams per mole is N2O. Firstly, we have to determine the empirical formula of the compound.

We will do this by calculating the number of moles of each element present in the compound by dividing the mass by its respective atomic weight. 30.4 grams of nitrogen can be represented as:

30.4 g N × 1 mol N/14.007 g N = 2.17 mol NSimilarly, 69.6 grams of oxygen can be represented as:69.6 g O × 1 mol O/15.999 g O = 4.35 mol O Now, we will divide both of these mole values by the smaller mole value, which is 2.17 mol N in this case. This will give us the simplest or empirical formula of the compound.

N = 2.17 mol N / 2.17 mol N = 1O = 4.35 mol O / 2.17 mol N = BTherefore, the empirical formula of the compound is N2O2, which is not the final molecular formula. We have to find the molecular formula by multiplying the empirical formula by a whole number, which is obtained by dividing the molar mass of the compound by the empirical formula mass. We can calculate the empirical formula mass as:

Empirical formula mass = (2 × atomic weight of N) + (2 × atomic weight of O)= (2 × 14.007) + (2 × 15.999) = 60.012 g/molNow, we can calculate the whole number by dividing the molar mass of the compound by the empirical formula mass:

Whole number = 89 g/mol ÷ 60.012 g/mol = 1.48 ≈ 1Therefore, the molecular formula of the compound is the empirical formula (N2O) multiplied by 1, which gives us the final answer of N2O. The molecular formula of the compound that contains 30.4 grams of N and 69.6 g of O and has a molar mass of 89 grams/mol is N2O. To obtain this answer, we first calculated the empirical formula of the compound to be N2O2. We then calculated the whole number by dividing the molar mass of the compound by the empirical formula mass, which was found to be 1. This whole number was used to multiply the empirical formula to obtain the final molecular formula of N2O.

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The compounds in the reaction that shifts the equilibrium with the common ion effect are \(\rm MgSO_2\;and\;HNO_3\).

The equilibrium condition has an equal amount of reactant and products in the reaction.

The addition of ions same as product or reactant results in a change in the equilibrium of condition and shifts the equilibrium in opposite direction.

The given reaction is:

\(\rm H_2SO_4\;\rightleftharpoons 2H^+\;+\;SO_4^{2-}\)

The addition of sulfate and hydrogen ions shifts the equilibrium.

Thus, the compounds that shift the equilibrium for the reaction are \(\rm MgSO_2\;and\;HNO_3\).

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Answer:

first part is A and C second part is B

Explanation:

got 100 percent on edge

Answer:The images for the 3 sub-questions have been presented in the first, second and third attached image to this solution.

Explanation:

Energy diagram which is relative to the energy level of the reactants is attached in the picture below.

Electrons present in an atom revolve in different orbits which are stationary states and are also called as energy levels. The energy levels are numbered as integers which are also called as principal quantum numbers.

Energy of the stationary state is given as E= -R

1/n² where R

is the Rydberg's constant. When an electron is excited, and it moves from lower to higher energy levels there is absorption of energy, while when it moves from higher energy level to lower energy level it radiates or gives out energy in the form of radiation.

They can also be defined as the distances between electron and nucleus of an atom . Electrons present in K energy level have least energy .Energy level diagrams are studied to understand nature of bonding , placement of electrons in orbits and and elemental behavior under certain conditions.

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There are three types of rocks namley sedimentary rocks, metamorphic rocks and igneous rocks. They will interchange to each other by the process called rock cycle.

Rock cycle illustrates how the three primary types of rocks—sedimentary, metamorphic, and igneous—change over the course of geologic time. When a rock is pushed out of its equilibrium circumstances, it changes.

For instance, an igneous rock like basalt may disintegrate and evaporate when exposed to air or melt when it is subducted beneath a continent.

Rocks do not stay in an equilibrium state; rather, they change as they interact with new environments because of the driving forces of the rock cycle, plate tectonics, and the water cycle.

The rock cycle illustrates the relationships between the three types of rocks and the gradual transition of processes from one type to another.

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If KNO3 is dissolved in water or melted, the ions will become free to move and the substance will be able to conduct electricity. The correct answer is option C.

In order to conduct electricity, a substance must have charged particles that are free to move. In K, the substance exhibits metallic bonding which according to the electron sea model means the valence electrons are free to move and conduct electricity. In KNO3, the substance is an ionic compound that has charged particles (ions) but the ions are locked in place in the crystal lattice and are unable to conduct electricity.

Solid potassium (K) is a metal, and metals are known to be good conductors of electricity. This is due to the fact that they have a sea of delocalized electrons that are free to move and carry an electrical charge. On the other hand, solid potassium nitrate (KNO3) is an ionic compound, which means it is made up of positive and negative ions held together by ionic bonds. In the solid state, these ions are locked in place in a crystal lattice and are unable to move, which is why solid KNO3 does not conduct electricity.

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To make a buffer solution, you must use solutions of a weak acid and its conjugate base.

For example, if you wanted to make a buffer solution with a pH of 4.5, you would mix a solution of acetic acid (CH3COOH) and sodium acetate (CH3COONa).

The acetic acid is the weak acid and the sodium acetate is its conjugate base. The concentrations of the two solutions should be in a ratio of 1:1 in order to maintain the desired pH.

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The correct answer for the thermochemical equation for the standard molar enthalpy of formation of solid zinc nitrate is option b) Zn(s) + 2N(g) + 6O(g) → Zn(NO3)2(s).

This equation represents the formation of one mole of solid zinc nitrate from its constituent elements in their standard states, with all reactants and products in their standard states and under standard conditions (25°C and 1 atm pressure).
To determine the standard molar enthalpy of formation of a compound, we need to measure the enthalpy change that occurs when one mole of the compound is formed from its elements in their standard states. In this case, we need to measure the enthalpy change for the reaction Zn(s) + 2N(g) + 6O(g) → Zn(NO3)2(s), which corresponds to the formation of one mole of solid zinc nitrate from its elements in their standard states.
This reaction can be measured experimentally using calorimetry, which involves measuring the heat released or absorbed during the reaction. The enthalpy change for this reaction is then divided by the number of moles of zinc nitrate formed to obtain the standard molar enthalpy of formation of solid zinc nitrate.

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Answer:

Isotopes have same atomic numbers, no. of protons and no. of electrons. Only their no. of neutrons and atomic mass are changed.

Na - 24:

Atomic Mass = 24

Atomic No. = 11

Hence,

No. of protons in Na-24 = 11

No. of neutrons = Atomic Mass - Atomic Number

No. of neutrons = 24 - 11

No. of neutrons = 13

Atomic Number = 11

\(\rule[225]{225}{2}\)

Hope this helped!

Answer:

C

Explanation:

Electrons are negatively charged with a charge of -1e. They can move between atoms while protons stay in the atom.

The partial pressure of the third gas, helium will be \(P_h=0.22\ atm\)

According to Dolton's law of partial pressure if the mixture of gases exists in a container then the total pressure exerted by the gas will be the sum of the partial pressure of each case.

Now from the question, it is given

The total pressure of the three noble gases  \(P_t=1.25\ atm\)

The individual pressure of Neon= 0.68 atm

The individual pressure of  argon=0.35 atm

The partial pressure of the third gas will be:

\(P_t=P_A+P_N+P_H\)

\(P_H=P_T-P_A-P_N\)

\(P_H=1.25-0.68-0.35=0.22\ atm\)

Hence the partial pressure of the third gas, helium will be \(P_h=0.22\ atm\)

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Answer:

a. .22

Explanation:

Answer:

24 pills

Explanation:

650 mg/1000 = 0.65 g

(There are 1000 mg in one g)

15.6g/0.65g=24

The ranking of the compounds in decreasing order of water solubility (highest to lowest) is: IV. CH₃CH₂OH > III. CH₃CH₂OCH₂CH₂OH > II. CH₃CH₂OCH₂CH₂CH₃ > I. CH₃CH₂CH₂CH₂OH.

Water solubility depends on the ability of a compound to form hydrogen bonds with water molecules. IV. CH₃CH₂OH (ethanol) has the highest solubility due to its small size and a hydroxyl group (-OH) that can form hydrogen bonds.

III. CH₃CH₂OCH₂CH₂OH (diethylene glycol monoethyl ether) has two polar groups, which increases its solubility compared to II. CH₃CH₂OCH₂CH₂CH₃ (diethyl ether).

Diethyl ether has only one polar ether group, which is less polar than the hydroxyl group, thus having lower solubility than the other two. Finally, I. CH₃CH₂CH₂CH₂OH (1-butanol) has a larger nonpolar hydrocarbon chain, making it less soluble in water compared to the other compounds.

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The electron configuration of a potassium atom at ground state is 1s²2s²2p⁶3s²3p⁶4s¹. Therefore, option D is correct.

The electron configuration of an element can be explained as electrons being occupied in different energy levels of an atom of a specific element. In the electron configuration, the electrons are usually written as a superscript of atomic subshells. For example, the electron configuration of Helium can be represented as 1s²2s².

The sequence of completely filled subshells similar to neighboring the electronic configuration of a noble gas is represented by square brackets. The principal quantum number (n) will be used to denote the maximum number of electrons in an electron shell.

The total number of electrons occupied in the given electronic configuration  1s²2s²2p⁶3s²3p⁶4s¹  is 19. The atomic number of potassium is 19 therefore it is the configuration of potassium.

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When a neutron is fired into one of 100 atoms of uranium-235, it can cause a chain reaction.

Uranium-235 is an isotope of uranium that is fissile, meaning it can undergo nuclear fission. When a neutron collides with a uranium-235 nucleus, it causes the nucleus to become unstable and break apart into two smaller nuclei and several additional neutrons. These additional neutrons then go on to collide with other uranium-235 nuclei, causing them to undergo fission as well, releasing more neutrons in the processThis process of neutron-induced fission can continue, releasing large amounts of energy in the form of heat and light, as well as radiation. The chain reaction can be controlled or made to stop by adding or removing neutrons from the system, making the neutron to nucleus collision less likely to occur.In a nuclear power plant, the chain reaction is controlled and the heat generated by the fission reactions is used to produce steam, which drives turbines to generate electricity. In a nuclear weapon, the chain reaction is uncontrolled, resulting in a much larger release of energy in a much shorter period of time.

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It takes approximately 406,687.5 joules of energy to take 150 grams of ice from -15°C to 125°C.

To determine the amount of energy required to take ice from -15°C to 125°C, we need to consider two stages of the process; Heating the ice from -15°C to 0°C, causing it to melt, and Heating the resulting water from 0°C to 125°C

We can calculate the amount of energy required for each stage separately and then add them together to get the total energy required.

Heating the ice from -15°C to 0°C; The specific heat capacity of ice is 2.09 J/(g·°C), which means that it takes 2.09 joules of energy to raise the temperature of 1 gram of ice by 1°C. Since we have 150 grams of ice, we can calculate the amount of energy required to raise the temperature of the ice from -15°C to 0°C as;

Q1 = m × c × ΔT

= 150 g × 2.09 J/(g·°C) × (0°C - (-15°C))

= 4,987.5 J

Therefore, it takes 4,987.5 joules of energy to heat the ice from -15°C to 0°C

Heating the water from 0°C to 125°C; The specific heat capacity of water is 4.18 J/(g·°C), which means that it takes 4.18 joules of energy to raise the temperature of 1 gram of water by 1°C. We need to heat the water from 0°C to 100°C (the boiling point of water at standard pressure) and then from 100°C to 125°C.

For the first stage, we can calculate the amount of energy required as;

Q₂a = m × c × ΔT

= 150 g × 4.18 J/(g·°C) × (100°C - 0°C)

= 62,700 J

The heat of vaporization of water at standard pressure is 2,260 J/g. Since we have 150 grams of water, we can calculate the amount of energy required to convert all the water to steam as:

Q₂b = m × Lv = 150 g × 2,260 J/g

= 339,000 J

Therefore, it takes a total of;

Q = Q₁ + Q₂a + Q₂b

= 4,987.5 J + 62,700 J + 339,000 J

= 406,687.5 J

Therefore, it takes 406,687.5 joules of energy.

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The correct option is (d) Carbon Dioxide.

Explanation:

The density of air is around 1.2 g/L, which means that any gas with a density above this value is more dense than air.

Carbon dioxide has a density of approximately 1.98 g/L, which is considerably more dense than air (composed of nitrogen and oxygen).

As a result, if a gas sample is determined to be more dense than air, it is likely to be carbon dioxide (CO2), which has a molecular weight of 44 g/mol.

Carbon dioxide is produced in the laboratory by many chemical reactions and is commonly employed in the food and beverage industries, such as carbonating soda and beer.

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A certain reaction has an activation energy of 58.74 kj/mol. At 507 kelvin temperature, the reaction proceed 7.00 times faster than it did at 337 k.

The physical concept of temperature indicates in numerical form how hot or cold something is. A thermometer is used to determine temperature. Thermometers are calibrated using a variety of temperature scales, which historically defined distinct reference points and thermometric substances. The most popular scales are the Kelvin scale (K), which is mostly used for scientific purposes, the Fahrenheit scale (°F), and the Celsius scale, which has the unit symbol °C.

1/T2 - 1/T1 = -Ea/(R×ln(k2/k1))

1/T2 - 1/T1 = -Ea/(R×ln7)

T2 = 1/(1/T1 - Ea/(Rln(7)))

T2 = 1/(1/337 - 58.74/(8.314×1.94591)) = 507 K

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Answer:where are the statements

Explanation: