molarity of a salt water solution of "0.47" moles of NaCl dissolved in a volume of 0.25L

Answer:

1.5

Explanation:

EDG 2020

250ml is the volume of 4M H[tex]_2[/tex]SO[tex]_4[/tex] is needed to produce 1L of 1 M H[tex]_2[/tex]SO[tex]_4[/tex].  The volume is the amount fluid that the container may hold.

A measurement of three-dimensional space is volume. Several imperial either Us or customary units, as well as SI-derived units (such the cubic meter and liter), are frequently used to quantify it quantitatively. Volume and length (cubed) have a symbiotic relationship.

The volume of such a container is often thought of as its capacity, not as the amount of space it takes up. In other words, the volume is the amount much fluid (liquid or gas) that the container may hold.

Molarity₁×Volume₁ = Molarity₂×Volume₂

4×Volume₁ = 1×1

Volume₁  = 250ml

Therefore, 250ml is the volume of 4M H[tex]_2[/tex]SO[tex]_4[/tex] is needed to produce 1L of 1 M H[tex]_2[/tex]SO[tex]_4[/tex].

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Your question is incomplete but most probably your full question was,

What volume of 4M H[tex]_2[/tex]SO[tex]_4[/tex] is needed to produce 1L of 1 M H[tex]_2[/tex]SO[tex]_4[/tex].

Answer:

1.13×10^25 molecules of water.

Explanation:

Equation of the reaction;

C8H18(g) + 25/2 O2 (g) -------> 8CO2(g) + 9H2O(l)

It is important to first put down the balanced reaction equation. It is not possible to solve any problem on stoichiometric relationship without a balanced reaction equation. Once the equation is obtained, we can now proceed with other steps in the solution of the problem.

From the reaction equation, 1 mole of C8H18 produces 9 moles of water

1 mole of C8H18 occupies 22.4L volume while 1 mole of water contains 6.02×10^23 molecules of water

Hence

22.4 L of C8H18 produces 9(6.02×10^23) molecules of water

46.72 L of C8H18 will produce 46.72 L × 9(6.02×10^23) molecules of water/22.4 L

= 113×10^23 or 1.13×10^25 molecules of water.

Answer:

The litmus paper will turn blue; Ca(OH)₂  

Explanation:

Limewater is a dilute aqueous solution of calcium hydroxide.

Ca(OH)₂(aq) ⟶ Ca²⁺(aq) + 2OH⁻ (aq)

Limewater contains hydroxide ions. They cause the limewater to be basic.

Litmus is a mixture of dyes extracted from lichens. They are weak acids with complicated formulas.

Let's just write the formula for litmus as HLit.

The hydroxide ions from limewater react with the H of litmus to form a salt — the base form — and water.

    HLit + OH⁻ ⟶     Lit⁻    + H₂O

acid form            base form

    red                      blue

The base form of litmus is blue, so

Red litmus turns blue in the presence of limewater.

Red litmus paper turns blue when added to limewater due to its alkaline nature (Ca(OH)2).

When red litmus paper is added to limewater, it will turn blue. This color change occurs because limewater, which has the chemical formula Ca(OH)2, is alkaline/basic in nature. The reaction between the red litmus paper and the limewater indicates the alkaline properties of limewater.

nonpolar covalent bond (with LD force)

Answer:

Al+O= Al2O3

Explanation:

the chemical formula is Al3 +O2 so if we swapped and dropped the resulting compound is Al2O3

hope this helps

Answer:

C. Single covalent bond

Explanation:

A covalent bond would form between these atoms. Covalent bonds

involve atoms sharing electrons.

have a good day

-Hops

Answer:

Diluted solution

Explanation:

It is simple in terms of looking in to it, solute is the solid part of the solution and if a small quantity is dissolved in a solvent which can hold more then the solute added will make the solution diluted and for more info- other answers depict that there is more solute in the solution therefore others can not be the answer

Final answer:

An unsaturated solution contains less solute than it can possibly hold at a given temperature, meaning more solute can still be dissolved. The correct option is b.

Explanation:

A solution that contains less solute than it can possibly hold at a given temperature is referred to as an unsaturated solution. In an unsaturated solution, the solvent is holding solute less than the maximum limit, which indicates that more solute can be dissolved. This is in contrast to a saturated solution, where the solvent is holding the maximum amount of solute that it can dissolve at a given temperature. Another related term is a supersaturated solution, which contains more solute than the solubility limit at a particular temperature and requires special conditions, such as cooling a hot saturated solution, to be formed.

Answer:loss of electrons

Explanation:

The change occurring at the anode in an operating electrochemical cell is the loss of electrons [4 ] , which is called oxidation. This is in contrast to the cathode, where reduction occurs and electrons are gained.  Option 4 is correct .

In an operating electrochemical cell, the change that occurs at the anode is the loss of electrons. This process is known as oxidation. Remember that oxidation can be easily recalled using the mnemonic 'OIL RIG' which stands for Oxidation Is Loss, Reduction Is Gain of electrons. Therefore, the correct option from the provided choices would be 4: loss of electrons.

To give a practical example, consider a zinc electrode undergoing oxidation in a voltaic cell. Here, zinc atoms at the anode lose electrons to become zinc ions (Zn²⁺). This can be represented by the half-reaction Zn(s) ⇒ Zn²⁺ (aq) + 2e
The released electrons then travel through an external circuit to reach the cathode.

Furthermore, in the process of reduction, occurring at the cathode, copper ions (Cu²⁺) in the solution gain electrons to become solid copper (Cu). This indicates that while the anode loses electrons, the cathode gains them, completing the circuit and allowing the cell to do work.

Answer:

I think it would be double D.

The C. Quadruple is not a type of covalent bond

A covalent bond is formed when two atoms share electrons between them. The types of covalent bonds are non-polar, polar, single, double, and triple. Non-polar covalent bonds occur when electrons are shared equally between atoms, while polar covalent bonds occur when electrons are shared unequally between atoms. Double and triple bonds occur when more than one pair of electrons is shared between atoms.

Quadruple is not a recognized type of covalent bond in chemistry. Covalent bonds typically refer to single, double, and sometimes triple bonds, which involve the sharing of one, two, or three pairs of electrons between atoms, respectively. Quadruple bonds are not commonly observed in chemical compounds. Thank you for pointing out the clarification.

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Answer:

a) 171

Explanation:

We can find the mass (in grams) of a sample by multiplying the amount of moles by the molar mass.

In this case, we know we have 0.500-mol and would multiply it by the molar mass, 342.3g/mol, to give us the answer of 171.15g rounded down to 171g.

Equation: 0.500mol x 342.3g/mol = 171.15g

Answer:

171

Explanation:

Edg

Answer:

She is not correct because ∠1 is an alternate exterior angle with ∠3, not the angle that measures 105°. So m∠1 = 75°.

Explanation:

Hope This Helps :)

The measure of m<1 is 75 degrees showing that Carmen is incorrect.

The measure of <3 and 105 degrees are supplementary hence;

m<3 + m<105 = 180

m<3 = 180 - 105

m<3 = 75 degrees

From the diagram the two lines are parallel to each other, hence m<1 = m<3 (alternate exterior angle)

Hence the measure of m<1 is 75 degrees showing that Carmen is incorrect.

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D is the answer to the question.

Answer: C. Quart

Explanation:

Quart is a unit of measurement for liquids and is equivalent to 2 pints.

Quart is a unit which is used rarely if ever in science labs.

Units are used in measurement and have a definite magnitude which is defined and adopted by law and is used as a standard for measurement of same kind of quantity. Any other quantity of the same  kind  is expressed as a multiple of unit of the measurement.

There are many system of units which are common out of which International System of units  is the modern form of the metric system.

The fields of science, engineering  make use of units  which aids researchers in problem solving . The system of units varies from country to country  and the different system of units are SI system,MKS system and CGS system .

Centimeter, gram and millimeter are SI units which are used in science labs while quart is a non-SI unit and is not oftenly used in labs.

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Answer:

Option A. X represents water and Z represents oxygen.

Explanation:

Glucose + Z → X + Y + Energy

The equation above gives an illustration of the Combustion of glucose to produce energy needed for metabolic activities.

Thus, writing a balanced equation will help us to identify what X and Z most likely represent. This is illustrated below :

C6H12O6 + 6O2 —> 6H2O + 6CO2 + Energy

We can see clearly that Z is constant i.e Z is oxygen. But X could be either CO2 or H2O.

Considering the options given above, only option A states that Z is oxygen. Therefore, X must be water (H2O).

Answer:

A

Explanation:

Answer:

a and c on edge

Explanation:

Answer:

A- It represents a reaction that involves rearrangement of atoms.

B- It represents a reaction in which hydrogen electrons and oxygen electrons undergo change.

Answer:

B

Explanation:

A characteristic of members of the domain Bacteria is that they: C. lack a nucleus in their cells.

A cell can be defined as the fundamental, functional, structural and smallest unit of life, which is primarily found in all living organisms.

Basically, all living organisms are broadly classified into two (2) main categories according to their cell type and these are;

The domain Bacteria are generally prokaryotes, which means that they are prokaryotic cells with bacterial rRNA but no nuclear membrane.

In conclusion, all members of the domain Bacteria lack a nucleus in their cells.

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Answer:

The hydrogen ion concentration of a solution is 0.01 m what is its PH

Explanation: The pH of a given solution is nothing more than the negative log base 10 of the concentration of hydrogen ions, H+ , which you'll sometimes see written as H3O+ , the hydronium ion. Because the pH is <7 , this solution will be acidic

Explanation:

A child complains that his soup is too hot. His mother places an ice cube in the soup to cool it.

How will the soup's thermal energy behave?

Answer:

It will flow from the soup to the ice cube

Explanation:

When an ice cube with low thermal energy is in a hand that has higher thermal energy, thermal energy will flow from the hand to the ice cube in the form of heat.

Answer:

B. It will flow from the soup to the ice cube

Explanation:

Final answer:

When 40.0 g of NaOH is added to 1.00 L of water, it does not make a 1.00 M NaOH solution because the molarity of a solution is calculated by dividing the number of moles of solute by the volume of the solution in liters.

Explanation:

When 40.0 g of NaOH is added to 1.00 L of water, it does not make a 1.00 M NaOH solution because the molarity of a solution is calculated by dividing the number of moles of solute by the volume of the solution in liters.

To make a 1.00 M NaOH solution, we need to know the number of moles of NaOH and the volume of the solution in which it is dissolved. In this case, we are given the mass of NaOH (40.0 g) but not the volume of the solution. Without the volume, we cannot calculate the molarity.

To determine the molarity, we need to know either the volume of the solution or the number of moles of NaOH added to the solution.

Answer:

When water droplets get too heavy.

Explanation:

Hope this helps.

Answer:

when the ☁ cant hold no more rain

Explanation:

Answer:

the answer is (WIND) trust me its right good luck on the test

Explanation:

Answer:

CO₃²⁻ + Ca²⁺ → CaCO₃(s)

Explanation:

In a net ionic equation there are listed just the ions that are involved in the reaction.

For the reaction:

Na₂CO₃(aq) + Ca(NO₃)₂(aq) → 2NaNO₃(aq) + CaCO₃(s)

Ions are:

2 Na⁺ + CO₃²⁻ + Ca²⁺ + 2 NO₃⁻ → 2 Na⁺ + 2 NO₃⁻ +  CaCO₃(s)

Thus, ions that react are just CO₃²⁻ and Ca²⁺ and net ionic equation is:

CO₃²⁻ + Ca²⁺ → CaCO₃(s)

The net ionic equation for the reaction between Na2CO3 and Ca(NO3)2, removing the spectator ions, is 2Na+ + CO32- + Ca2+ → CaCO3 + 2Na+.

You were asked to write the net ionic equation for the reaction that occurs when solutions of Na2CO3 and Ca(NO3)2 are mixed. The net ionic equation only includes those substances and ions in the ionic compounds that undergo a chemical change. In this case, they are the ions that combine to form the precipitate CaCO3.

The net ionic equation removes any spectator ions (ions that do not participate directly in the reaction but exist in the solution). In this reaction, the nitrate ions (NO3-) and the sodium ions (Na+) are the spectator ions, as they remain in the solution and do not form a part of the precipitate.

Therefore, the net ionic equation is: 2Na+ + CO32- + Ca2+ → CaCO3 + 2Na+

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Answer:

higher gas pressure inside the balloon

Explanation:

The kinetic energy of an object is defined as the work needed to accelerate an object of a given mass from rest to motion.

A person walking is an example of kinetic energy.

The particles of a gas inside a balloon are experiencing an increase in their average kinetic energy and the number of collisions  with the wall of the balloon due to higher gas pressure inside the balloon

Objects considered a solid:

Pencil

Water bottle

Phone

Table

Plant

Atoms are very attracted to one another in solid objects. They vibrate, but remain in fixed positions without moving.

Final answer:

A solid is a state of matter in which atoms or molecules do not have enough energy to move. They are constantly in contact and in fixed positions relative to one another.

Explanation:

A solid is a state of matter in which atoms or molecules do not have enough energy to move. They are constantly in contact and in fixed positions relative to one another. Forces between atoms or molecules are strong enough to keep the molecules together and to prevent them from moving past one another.

Answer: 1.0 mole of sodium

Explanation:

40.0 g NaOH  x __1 mol__ x __2 mol Na__ = 1 mol of Na

                            39.999 g      2 mol NaOH

Answer:

Graph D is correct since the Force is inversely proportional to the square of the distance.

Graph D is correct.

The relationship between Coulomb force and the distance between the charged particles is as follows:-

[tex]F=k(q_1*q_2)/(r^2)[/tex]......(1)

Here, q1 and q2 are the charges, r is the distance between charged particles, and k is the coulomb constant.

From equation (1), it can be said that the force is inversely proportional to the square of the distance. So, Graph D is correct.

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Answer:

Zero point five Molar solutions

Explanation:

In chemistry, there are units for expression the concentration of a solution. The concentration of a solution is defined as the amount of solute present in a given volume of solvent. There are diverse units of concentration recognized in chemistry with each one written in its own unique way and with its own unique symbols. Some concentration units are even expressed in percentage.

However, molar concentration is shown as M (upper case letter M). This unit is alternatively written as molL-1. When we write 0.5 M, we pronounce it as zero point five molar.

Answer: 8.33 mol of HCl (Hydrochloric Acid)

Explanation:

150 g H2O  x __1 mol__ x __1 mol HCl__  =  8.33 mol of HCl

                         18.016 g        1 mol H2O