The solubility of potassium chloride is 34 g KCl
100 g H2O
at 20C. What is the maximum amount of KCl that can
dissolve in 200 g of water at 20C?

A chemical reaction is the combination of two or more elements or compounds to form one or more products. The combining compounds or elements are called reactants. Hence, sodium and chlorine are reactants. Thus option D is correct.

A chemical reaction is a change in the chemical composition that occurs when two or more species unite to create a new product by forming or breaking chemical bonds.

The reactants are the organisms that are reacting. In a reaction's chemical equation, they are shown on the left side. The right side of the arrow is where the products are shown.

Consider the reaction of sodium and chlorine to give NaCl.

Na + Cl ⇒ NaCl.

NaCl is the product in this reaction. Na and Cl are the reactants. Hence, option D is correct.

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when liquid water changes into solid ice, it increases in mass

Answer:

I think the answer Is 0.636 mol of CO2!

Answer:

The solutions are most likely hydrogen peroxide since it is the compound of hydrogen and oxygen that has a ratio of Hydrogen to Oxygen ratio of 1 : 1.

Note:The question is not complete.

Explanation:

The empirical formula of the two compounds are determined

Solution in beaker A:

Mass of Hydrogen = 4.425 g

Moles of hydrogen = reacting mass/molar mass = 4.425 g / 1 g/mol = 4.425 moles

Mass of oxygen = 70.575 g

Moles of oxygen = reacting mass/molar mass = 70.575 g / 16 g/mol= 4.411 moles

Mole ratio of Hydrogen to Oxygen = 4.425 : 4.411

Simplest mole ratio = 1 : 1

Therefore, empirical formula of solution in A = H₁O₁

Solution in beaker B:

Mass of Hydrogen = 7.38 g

Moles of hydrogen = reacting mass/molar mass = 7.38 g / 1 g/mol = 7.38 moles

Mass of oxygen = 117.6 g

Moles of oxygen = reacting mass/molar mass = 117.6 g / 16 g/mol= 7.35 moles

Mole ratio of Hydrogen to Oxygen = 7.38 : 7.35

Simplest mole ratio = 1 : 1

Therefore, empirical formula of solution in B = H₁O₁

The solutions in beakers A and B have the same empirical formula. Their molecular masses are not given, so their molecular formula is not certain. However, the solutions are most likely hydrogen peroxide since it is the compound of hydrogen and oxygen that has a ratio of Hydrogen to Oxygen ratio of 1 : 1.

Mass of Magnesium nitrate produced : 593.2 g

The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

2HNO₃ + Mg(OH)₂ → Mg(NO₃)₂ + 2H₂0

mol HNO₃ = 8

From the equation, mol ratio of HNO₃ : Mg(NO₃)₂ = 2 : 1, so mol Mg(NO₃)₂ :

[tex]\tt \dfrac{1}{2}\times 8=4~moles[/tex]

Mass Mg(NO₃)₂(MW=148,3 g/mol) :

[tex]\tt mass=mol\times MW\\\\mass=4\times 148,3 g/mol\\\\mass=593.2~g[/tex]

Answer:

using a diffrent colored light with a higher frequency

Explanation:

Answer:

Mass = 9.58 g  

Explanation:

Given data:

Mass of Fe₂O₃ formed = ?

Mass of Fe = 6.7 g

Solution:

Chemical equation:

4Fe + 3O₂        →    2Fe₂O₃

Number of moles of Fe:

Number of moles = mass/molar mass

Number of moles = 6.7 g/ 55.8 g/mol

Number of moles = 0.12 mol

now we will compare the moles of Fe and Fe₂O₃.

                         Fe         :          Fe₂O₃

                           4         :              2

                         0.12       :          2/4×0.12 = 0.06 mol

Mass of Fe₂O₃:

Mass = number of moles × molar mass

Mass = 0.06 mol  × 159.69 g/mol

Mass = 9.58 g  

Answer:

Be Electron configuration: 1s2 2s2

Be Orbital Diagram: \//\    \//\ (it would be little arrows going up and down to show the spins)

F Electron Configuration: 1s2 2s2 2p5

F Orbital Diagram: \//\    \//\    \//\ \//\ \/

Answer:

A

Explanation:

Answer:

option d

Explanation:

please mark me brainliest

Answer: S₅Br₆

Explanation: The prefix “penta-“ means five, and the prefix “hexa-“ means six.

Mass of HCl produced :15.59 g

Reaction

2NaCl + H₂SO₄ → 2HCl + Na₂SO₄

Excess = H₂SO₄

Limiting = NaCl

mass NaCl = 25 g

mol NaCl(MW=58.5 g/mol) :

[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{25}{58.5}=0.427[/tex]

From the equation, mol ratio NaCl : HCl = 2 : 2, so mol HCl = mol NaCl =0.427

Mass of HCl(MW=36.5 g/mol) :

[tex]\tt mass=mol\times MW\\\\mass=0.427\times 36.5\\\\mass=15.59~g[/tex]

Answer:

I think its A

Explanation:

Answer:

300 m

Explanation:

Answer:

300

Explanation:

20x15=300

i know that someone else already got this i just showed the work

Answer:

D. 10mm = 1 cm

E. 1000m = 1mm

G. 100 cm = 1 m

H. 1 m = 10 dm

Answer:

2.5 meter per second

Explanation:

momentum = mass multiplied by velocity

please mark me brainliest

Answer: is Cesium (Cs)

N-methyl-2-pyrrolidone is a very reactive compound. It reacts in an acidic medium to form a variety of products. Some reactions involve the ring-opening step.

The structure of N-methyl-2-pyrrolidone is given below:

The compound has a five-membered ring, which consists of four carbon atoms and one nitrogen atom. The ring has one oxygen attached to it via the double bond, and one methyl group is attached to the nitrogen atom.

The chemical reaction involved is as follows:

The structure of the product is given below:

N-methyl-2-pyrrolidone on reaction with strong aqueous acidic medium followed by the treatment of heat results in the opening of the ring and forms a compound having a carboxylic group at one end and protonated nitrogen atom which has one methyl group attached to it, at another end

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The statement that is true about compounds is that

the compound formed is different both physically and chemically compared to the elements that formed it, Compounds require lots of energy to be formed and to be separated and Compounds are easy to identify by their chemical formula. That is option D.

Chemical compounds are chemical substances that are made up of elements which are chemically combined together.

The combination of these elements leads to the formation of new chemical bonds making the newly formed chemical compounds different from the elements that formed it.

During the formation of these chemical compounds, bonds are being broken while other bonds are being formed to make a different chemical compounds.

The energy that is always required to breaks the chemical bond is called the bond energy.

To be able to identify a chemical compound, a chemical formula is being used for example, C6H12O6 is the chemical formula for glucose chemical compound.

Therefore, the statement that is correct concerning a chemical compound include the following:

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Answer:

Oo Japan. I love japan it’s so pretty and I wish I could go there, it’s my dream place to visit!

Explanation:

Answer: 40 days

Explanation: The substance completely disintegrates in 20 days the substance completely disintegrates in 40 days 1/8 part of the mass of the substance will be left intact at the end of 40 days.

The environment is indispensable in the molding of humans from pre historic times.

The term environment has to do with the surroundings of man. It is the area that surrounds man. Man is shaped by his environment because it has a profound influence on how man reasons and behaves.

In Psychology, the nature - nurture controversy has been a big subject of debate. This theory holds that the environment in which a person was born has a profound influence on the attitudes and perceptions of the individual.

This has held true in so many instances for instance, the faiths that we profess for most of our lives is the result of the religious upbringing that we received in the earlier years of life.

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The empirical formula of oxide of iron is Fe2O2 and its name is iron oxide.

Given:

Solution:

Now, calculate the relative mass of iron in iron oxide = Percentage of iron by mass / At. mass of iron

Relative mass of iron = 77.75/55.85 = 1.39

Relative mass of oxygen = Percentage of oxygen by mass / At. mass of iron = 22.25/16 = 1.39

Now the calculate the molar ratio of iron to oxygen = 1.39 : 1.39 = 2:2

Thus, the empirical formula of iron oxide is Fe2O2 and its name is iron oxide.

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"A solution of 5 M HCl is already made. You need to dilute the solution to 1 M HCl. The 1 M HCl solution is less concentrated." Thus, option b is correct.

Molar concentration has been the molarity of the solution that measures the amount of the solute present in the liter solution. It describes the solute concentration that depends on the volume.

The dilution of the solution by increasing the volume results in a decrease in the concentration as molarity and volume show an inverse relationship. So, 1 M is less concentrated than 5 M solution.

Therefore, option b. less concentrated is the correct blank.

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Your question is incomplete, but most probably your full question was, A solution of 5 M HCl is already made. You need to dilute the solution to 1 M HCl. The 1 M HCl solution is ____________.

a. more concentrated

b. less concentrated

c. neither

d. both less and more concentrated

Answer: 120 mph or 2 mpm

Explanation: 60/5= 12

12*10=120mph

Going 10 miles in 5 minutes means you would be able to go 20 miles in 10 minutes. You would have a total of 12 five minute blocks at 10 miles each. 60 miles in 30 minutes or 120 in 60 minutes.

Or 10 miles in 5 minutes would be 2 miles in 1 minute. (10/5=2)

Answer:

its the fourth one please mark as brainlest

Explanation:

The statement that all bonds in alkanes, alkenes, and alkynes can freely rotate at room temperature is false.

Alkanes are saturated hydrocarbons with single covalent bonds. All bond in alkanes can freely rotate.

For example, propane is a three carbon alkane (acyclic saturated hydrocarbon).

Chemical formula for the molecule of propane is CH₃-CH₂-CH₃.

Alkenes and alkynes are unsaturated hydrocarbons. Alkenes have one double bond between carbon atoms, while alkynes have one triple bond between carbon atoms. There is no free rotation in double and triple bonds.

R₂C=CR₂ is general formula for the alkenes.

R–C≡C–R is general formula for the alkynes.

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The mass of the nitrogen atoms in ammonia is 6.33 g.

We know that ammonia is made up of nitrogen and hydrogen and hydrogen. There is one mole of nitrogen and three moles of hydrogen in a mole of ammonia.

Since the ratio of the atoms of hydrogen to nitrogen is 3:1, the ratio of the masses of the atoms is; 1/3 = x/19

x = 6.33 g

The mass of the nitrogen atoms in ammonia is 6.33 g.

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Empirical formula tells us the relative ratios of different atoms in a compound.

The chemical formula for a compound obtained by composition analysis is always the empirical formula.

How to calculate Empirical formula:

Linalyl acetate (bergamot oil):

              Carbon               Hydrogen                  Oxygen

                73.41 %                   10.29 %                  16.30 %

             73.41 / 12               10.29 / 1                   16.30 / 16

               6.11                          10.29                        1.01

            6.11 / 1.01                10.29 / 1.01                1.01 / 1.01

                 6                            10                                1

          Empirical formula : C₆H₁₀O

Thus we can conclude that empirical formula of linalyl acetate is  C₆H₁₀O

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The empirical formula for Linalyl acetate expresses the relative proportions of different atoms in a compound.

Linalyl acetate is a phytochemical found in a variety of flowers and spice plants. It is an important component of bergamot and lavender essential oils. It is the linalool acetate ester, and the two are frequently found together.

Hence, the empirical formula describes the relative proportions of different atoms in a compound. The chemical formula for a compound obtained through composition analysis is always the empirical formula.

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Answer:

B

Explanation:

Because the mass of an object increases, then the acceleration will decrease