How many moles are in a solution if I have 2.21 M of NaCl in 1.14 L?

A.1.12 mol

B.2.52 mol

C.4.15 mol

D.7.89 mol

The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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The amount of substance is measured with the SI unit, the mole.

Mole is the ratio of the given mass of substance to the molar mass of that substance.

Or it is the ratio of the number of molecules of substance to the Avogadro number.

Mathematically, it can be written as

Mole = given mass / molar mass

Or Mole = number of molecules / Avogadro number.

For first case,

Temperature is measured with the SI unit, the celsius. So, this is incorrect option.

For second case,

As we know that, mass is measured with the SI unit, the gram. So, this is also incorrect option.

For fourth case,

Length is measured with the SI unit, the metre. So, this is also incorrect option.

Therefore, option C is the correct option.

Thus, we concluded that the amount of substance is measured with the SI unit, the mole.

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Answer:

A. from high places to low places

Answer:

good job ;0

Explanation:

A hydronium ion is H30+. To perform the reaction with hydronium ion, the student could use either of the following sets of reagents H₂O, HCl and H₂O,H₂SO₄.

It is obtained when the lone pair of electrons on oxygen atom of water molecule is donated to a proton. A coordinate covalent bond is formed between oxygen atom and proton.

The proton can be obtained from the ionization of an acid such as hydrochloric acid (HCl) or sulfuric acid (H₂SO₄) .

HCl + H₂O → H₃0⁺ + Cl⁻

H₂SO₄ + H₂O → H₃0⁺ + HSO₄⁻

Hence, to perform the reaction with hydronium ion, the student could use either of the following sets of reagents H₂O, HCl and H₂O,H₂SO₄.

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The combination in Option D , NaCl + HCl  is not a buffer

A buffer is a solution which is added to resist changes in pH when a small amount of acid.

It is generally made of weak base with its conjugated acid ,  weak acid with its conjugated base.

A buffer comes with a defined with a capacity .

Among the given option the solution mixture  which is not a buffer is

NaCl + HCl

as a buffer is not made of a strong acid and its salt.

Therefore Option D is not a buffer.

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Answer: Metallic bonding.

Explanation: Aluminum forms metallic bonds with itself. This results in a metallic lattice structure.

Aluminum is found in the 13 group of periodic table and it mostly forms ionic bonds with metal. The structure of Aluminum is Orthorhombic mainly.

What is element?

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same. Two or more than two atoms with different physical or chemical properties can not combine together to form an element.

The structure of Aluminum is Orthorhombic and it contains high neutron capture cross section. It is very stable in dry air but oxidizes in moist air. It reacts with oxygen to form Al₂O₃.Valence of Aluminum is III. Its electronic configuration is  [Ar]3d¹⁰ 4s² 4p¹

Thus  structure of Aluminum is Orthorhombic and metallic bond is formed by Aluminum

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Answer:

methane

Explanation: methane is obtained from the decaying of flora and fauna mostlyunder damp

Answer:

Explanation:

Electric current in a wire, where the charge carriers are electrons, is a measure of the quantity of charge passing any point of the wire per unit of time. ... Current is usually denoted by the symbol I. Ohm's law relates the current flowing through a conductor to the voltage V and resistance R; that is, V = IR.

Answer: O how well electrical energy moves in a circuit

Explanation: Electric current is a measure of the flow of charge, as, for example, charge flowing through a wire. Electric current in a wire, where the charge carriers are electrons, is a measure of the quantity of charge passing any point of the wire per unit of time.

Answer: 0.27 moles of CO2 and 11.88 grams of CO2

Explanation: Use the Ideal Gas Law, PV = nRT, substitute the values given and solve.

I can't seem to upload procedure but:

P = 1.5atm

V = 4.5L

n = moles

R = 0.0821gr/mol (when using atm, kPa is 8.31)

T = 300K

Isolate what you don't have, in this case n. Change PV = nRT to PV/RT = n. Substitute the values to get moles. Once you have this, multiply the value by the molar mass of CO2 (44gr/mol) to get the mass of CO2 in grams.

If a less concentrated initial solution of sodium bicarbonate was used in beaker C, it would require more bicarbonate to neutralize the acid.

Concentrated means something that has been increased in strength or power by reducing its volume. It can refer to a solution that has a higher concentration of solutes than the original solution, a sound that is louder or stronger, or a force that is more powerful or intense. Concentrated can also refer to a person’s focus or attention on one particular thing, when their thoughts and energy are directed to a single point.

This is because the concentration of sodium bicarbonate determines how much of the acid can be neutralized by the solution. If the initial solution is less concentrated, then it will take more of the bicarbonate to neutralize the same amount of acid.

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Answer:

142.36 kg

Explanation:

volume of water in the lake = surface area x depth

= 18.5 x ( 1760 x 3 )² x 39 ft³

= 2.011 x 10¹⁰ ft³

= 2.011 x 10¹⁰ x 28.3168 liter .

= 56.945 x 10¹⁰ liter .

concentration of mercury = .25 x 10⁻⁶ g / liter

= 25 x 10⁻⁸ g / liter

= 25 x 10⁻¹¹ kg / liter

mass of mercury in the water of lake

= 25 x 10⁻¹¹ x 56.945 x 10¹⁰ kg

= 142.36 kg .

The ice changes temperature faster than the liquid water does because the specific heat of ice is less than the specific heat of liquid water. Thus, option 1 is correct.

The amount of heat needed to raise a substance's temperature by one degree Celsius in one gramme is known as its specific heat. Calories or joules per gramme per degree Celsius are frequently used as the units of specific heat. For instance, water has a specific heat of 1 calorie (4.186 joules) per gramme per degree Celsius.

The concept of specific heat was developed by the Scottish scientist Joseph Black in the 18th century as a result of his observation that equal masses of various substances required different amounts of heat to raise them through the same temperature range. French physicists Pierre-Louis Dulong and Alexis-Thérèse Petit showed in the early 19th century that measurements of a substance's specific heat allow one to calculate their atomic weights.

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Complete question:

When equal masses of ice and liquid water receive the same amount of energy, without a change in state, the ice changes temperature faster than the liquid water does because the

(1) specific heat of ice is less than the specific heat of liquid water

(2) specific heat of ice is greater than the specific heat of liquid water

(3) density of ice is less than the density of liquid water

(4) density of ice is greater than the density of liquid water

Answer:

The Sun is a star.

Explanation:

Answer:

sound and sunlight are not considered matter but, the rest is matter

Explanation:

We can see that an atom with 14 protons, 14 neutrons, and 16 electrons is unstable, and has a -2 charge.

So the correct option is the third one.

An atom with 14 protons, 14 neutrons, and 16 electrons is not stable. The number of protons in an atom, also known as its atomic number, determines its element and its chemical properties. In this case, the atom has 14 protons, which corresponds to the element silicon (Si) on the periodic table.

For an atom to be stable, it should have a balanced number of protons and electrons. Electrons are negatively charged particles that orbit the nucleus of an atom in energy levels or electron shells. The number of electrons in a stable atom should be equal to the number of protons, resulting in a neutral charge overall.

In this case, the atom has 14 protons and 16 electrons, which means it has two more electrons than protons, resulting in a net charge of -2. This is an example of an ion.

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1. The IUPAC name of N is nitrogen.

2. Nitrogen dioxide

3.The IUPAC name of O is oxygen

4.The IUPAC name of OH is hydroxyl.

The IUPAC name of ·0 is a radical. It is commonly found in organic chemistry and plays an important role in many reactions.

IUPAC names for the given compounds are:1.1. N: Nitrogen

The IUPAC name of N is nitrogen.

It is a non-metal and belongs to group 15 in the periodic table. It has an electronic configuration of 1s2 2s2 2p3.1.2. NO2: Nitrogen dioxide

Explanation: NO2 is a chemical compound that is formed by the combination of nitrogen and oxygen. It is a reddish-brown gas that has a pungent odor.

The IUPAC name of NO2 is nitrogen dioxide.1.3. O: Oxygen

Explanation: The IUPAC name of O is oxygen.

It is a non-metal and belongs to group 16 in the periodic table. It has an electronic configuration of 1s2 2s2 2p4.

X: UnknownExplanation: No IUPAC name can be given to an unknown compound as the structure and composition are not known.

Y: Hydroxyl Explanation: The IUPAC name of OH is hydroxyl.

It is a functional group that is composed of an oxygen atom and a hydrogen atom (-OH). It is commonly found in alcohols and phenols. ·0: RadicalExplanation: A radical is a molecule or an ion that contains an unpaired electron.

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Note: The complete question is given below

Provide the IUPAC names for the following compounds:

\(CH_3CH_2CH(CH_3)CH_2CH_2CH_2CH_3\)

C6H5CH(CH3)2

H2NCH2CH2CH2CH2CH2NH2

CH3CH2CH2CH2CH2OH

CH3CH2CH2CHOHCH3

Filtration is the process of passing a liquid containing contaminants through a filter to get a cleaner liquid.

After filtration impurities are left on the filter when the liquid goes through it, resulting in a cleaner combination. The procedure of separating one ingredient from another in a compound is used in the purification of chemical compounds or any materials. A mixed sample is turned into fresh samples, each of which contains a single ingredient.Separation procedures are then utilised to separate these compounds. These techniques alter the relative proportions of components in a combination.The type of the compounds and the impurities in them influence the purification of organic chemicals and compounds.

Purification of compounds can be done in other methods as well such as distillation, chromatography, sublimation and crystallisation.

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Full question:

What can you conclude after learning about filtration of solutions of organic compounds? Name other methods of purification of compounds.

Answer:

beryllium

Explanation:

The oxidation number for carbon in H2CO3 is +4, is so option d.

It is the electrical charge of an atom when it is part of a compound. This charge depends on the number of electrons gained, lost or shared by an atom.

                               H   C  O

Oxidation number: +1 +4 -2

Carbon (Z=6) can have oxidation numbers ranging from -4 to +4.

C can present different oxidation states within the same compound that contains more than one atom of it.

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Answer:

he liquid particles move faster than solids

Explanation:

solids particles have no space so they can not move but only they can vibrate to and fro

liquid particles have little space between them so they can move

Answer:

ye, it will be optically active

Explanation:

a compound is said to be optically active if it can optically rotate.

the removal of carboxyl group and release of cabon dioxide from carboxylic acid in acetoacetate synthesis which will result in production of ketone as given the attachment below.

ANSWER

The correct unit for molarity is mol/L

EXPLANATION

Molarity is the measures of the concentration of a solute in the solution.

Mathematically, the formula is given below as

Therefore, the correct unit for molarity is mol/L

The molar mass exists the mass of all the atoms in a molecule in grams per mole.

The molar mass of a chemical compound exists  described as  the mass of a sample of that  compound divided by the amount of substance which is the numeral of moles in that sample, measured in moles. The molar mass exists as a bulk, not molecular, property of a substance.

The molar mass of a compound represents the mass of 1 mole of that distinct substance and the number of grams per mole of a compound. In other words, the molar mass exists the total mass of all the atoms in grams that create a mole of a particular molecule. Consequently, the units of molar mass are grams/mole.

The molar mass exists the mass of all the atoms in a molecule in grams per mole. To compute the molar mass of a molecule, we first get the atomic weights from the individual elements in a periodic table. We then calculate the number of atoms and multiply it by the individual atomic masses.

Na2HPO4 molecular weight

Molar mass of Na2HPO4 = 141.958841 g/mol

This compound is also known as Disodium Phosphate.

Convert grams Na2HPO4 to moles  or  moles Na2HPO4 to grams

Molecular weight calculation:

22.98977*2 + 1.00794 + 30.973761 + 15.9994*4

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Answer:

a)

        Zn(s) + 2 H⁺(aq) ⇒ Zn²⁺(aq) + H₂(g)

#p⁺    30          2              30             2

#e⁻    30          0              28             2

b) 32

c) 30

d) Zn

Explanation:

There is some info missing. I will add the complete question.

Consider the following oxidation/reduction reaction.

         Zn(s) + 2 H⁺(aq) ⇒ Zn²⁺(aq) + H₂(g)

#p⁺                                                     2

#e⁻                                                     2

a) Fill in the number of protons and electrons for each product and reactant (two boxes have been filled in for you).

b) Verify that the number of protons on the left side of the chemical equation is equal to the number of protons of the right side. Show your work.

c) Verify that the number of electrons on the left side of the chemical equation is equal to the number of electrons of the right side. Show your work.

d) Which substance is being oxidized?

a) The atomic number of Zn is 30 so it will have 30 protons. Since it ts neutral, it will also have 30 electrons. Zn²⁺ will also have 30 protons but it lost 2 electrons, so it has 28 electrons. The atomic number of H⁺ is 1, so each H atom will have 1 proton (2 in total). But since H has 1 electron, and H⁺ lost 1 electron, H⁺ will have 0 electrons. The complete chart is:

        Zn(s) + 2 H⁺(aq) ⇒ Zn²⁺(aq) + H₂(g)

#p⁺    30          2              30             2

#e⁻    30          0              28             2

b) The total number of protons on the left side is: 30 + 2 = 32.

The total number of protons on the right side is: 30 + 2 = 32.

c) The total number of electrons on the left side is: 30 + 0 = 30.

The total number of electrons on the right side is: 28 + 2 = 30.

d) Zn(s) is oxidized because it loses electrons (from 30 to 28) and its number increases.

These substances have dispersed particles that are large enough to scatter light, making the beam visible. Therefore, out of the options provided, a mixture that scatters light is an example of a colloid. Option B)

A colloid is a type of mixture in which particles are dispersed throughout a medium, creating a homogeneous appearance. Unlike solutions, where the particles are completely dissolved, and suspensions, where the particles settle out, colloids have particles that are larger than those in solutions but smaller than those in suspensions. One characteristic of colloids is that they can scatter light due to the size of the particles. This scattering of light is known as the Tyndall effect. Examples of colloids include milk, fog, and aerosol sprays. These substances have dispersed particles that are large enough to scatter light, making the beam visible. Therefore, out of the options provided, a mixture that scatters light is an example of a colloid. Therefore option B) is correct

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Note Complete Question

which is an example of a colloid?

a mixture that settles out,

b mixture that scatters light,

c mixture that is separated by filtration,  

d salt and water mixture?

To obtain more accurate values of the densities of the pennies:

The density of a substance is the ratio of the mass of the substance to the volume of that substance.

It is a measure of the compactness of the matter in a substance.

The densities of the pennies made before 1982 was 8.7 g/ml

The actual density of pennies made before 1982 is about 8.8 g/mL.

The densities of the pennies made after 1982 was 6.9 g/ml

The actual density of pennies made after 1982 is about 7.2 g/mL.

Due to several random and experimental errors, the values obtained from the experiment are not exactly the same with the accepted values.

To obtain more accurate values:

In conclusion, the densities varied as as a result of random and experimental errors.

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Answer:

Prior to 1982, the densities of pennies were 8.7 g/ml.

The density of pre-1982 pennies is approximately 8.8 g/mL.

The densities of pennies produced after 1982 were 6.9 g/ml.

The density of pennies made after 1982 is approximately 7.2 g/mL.

The values obtained from the experiment do not exactly match the accepted values due to several random and experimental errors.

Explanation:

At STP, 1 mole of any gas occupies 22.4 L of space. Since we are given STP conditions here, we can use this ratio to determine the number of moles of CO gas: (32.8 L CO)/(22.4 mol CO/L CO) = 1.51 mol CO.

So, there are 1.51 moles of CO gas.

Answer:

ok, here is your answer

Explanation:

i am going to solve this problem by using the ICE table method which is an easy method to determine the pH of a weak base with the given data of the problem.Given:Initial volume of NH3 solution (Vi) = 75.0 mLInitial concentration of NH3 solution (Ci) = 0.200 MInitial moles of NH3 solution (Ni) = Ci x Vi = 0.200 M x 75.0 mL = 0.0150 molesKb = 1.8 x 10^-5Moles of HNO3 added (n) = 0.500 M x 17.0 mL = 0.00850 molesVolume of NH3 solution after the addition of HNO3 (Vf) = 75.0 mL + 17.0 mL = 92.0 mLConcentration of NH3 solution after the addition of HNO3 (Cf) = Ni / Vf = 0.0150 moles / 92.0 mL = 0.163 MTo find the pH after the addition of 17.0 mL of HNO3, we need to use the ICE table method.ICE table method:Initial: NH3 + H2O ⇌ NH4+ + OH-Change: -x 0 +x +xEquilibrium: 0.0150 - x 0 x xKb = [NH4+][OH-] / [NH3]1.8 x 10^-5 = x^2 / 0.163Solving for x, x = 0.00171 M[OH-] = 0.00171 M[OH-] = Kw / [H3O+] = 1.0 x 10^-14 / [H3O+][H3O+] = 5.85 x 10^-12pH = -log[H3O+]pH = -log(5.85 x 10^-12)pH = 11.23Therefore, the pH after the addition of 17.0 mL of HNO3 is approximately 11.23.