What are the products in a chemical reaction?

A. The substances that result from a chemical reaction
B. The substances that do not take part in a reaction
c. The substances that cause the reaction to occur
thing
D. The substances that react in a chemical reaction

A liquid substance that could be used in the laboratory for dissolving dry mortar on floor tiles is vinegar; (i) removing KMnO₄, stains is sodium metabisulfite solution; drying acid anhydrides is concentrated sulfuric acid.

Solvents are substances usually liquids, but may also be gases or solids that dissolve other substances known as solutes.

Solvents are usually used as cleansing agents.

One possible liquid substance that could be used for dissolving dry mortar on floor tiles is a mild acid solution, such as diluted hydrochloric acid or vinegar.

KMnO₄ stains are often difficult to remove, but one substance that can be used is sodium metabisulfite (Na₂S₂O₅) solution. Sodium metabisulfite acts as a reducing agent and can effectively neutralize and remove KMnO₄ stains.

Concentrated sulfuric acid is commonly used in the laboratory as a drying agent. It has a strong affinity for water and can efficiently absorb moisture, including water present in acid anhydrides.

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Answer:

Heating the system

It's the correct answer on the test. I don't understand this very well, but adding a catalyst doesn't change the equilibrium, and increasing the concentration of NO would shift it to the left. Heating the system will shift it right in an endothermic equation, which this is.

Explanation:

Answer:

The atomic size decreases with an increase in atomic number when we move from left to right.

Explanation: Hope it helps you:))))))

                      Have a great day.

Answer:

Your mom

Explanation:

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Mass of the object is 5.6196 * 10^4 g.

The term density has to do with the ratio of the mass to the volume of a substance. The density is an intrinsic property of a substance which could be used to identify a substance.

Mass of the substances = ?

Volume of the substance = 20. cm x 20.0 cm x 70.0 cm =28000 cm^3

Density of the substance = 2.007 g/cm3

Density = mass/volume

mass = density * volume

mass = 2.007 g/cm3  * 28000 cm^3

mass = 5.6196 * 10^4 g

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The argument for Harnessing Human Energy  for the School Principal is written below

Dear Principal Tom,

Human power as we have been taught is the effort or energy created by a human being. It is one that can be said to be pace of work per time. The Muscles act as the main source of power, and body heat can also be used for tasks like warming food, shelters, or other people.

There are lot of reasons why we need to make use of these energy and this is coming form the fact that energy from the environment is transformed by humans into forms that are very beneficial for their activities.

An example to buttress this point is from the first person to understand that running a magnet via a copper wire could create an electric current was an English physicist named Michael Faraday. It was a truly remarkable finding. Magnets and copper wire coils are used in enormous power plants to create almost all of the electricity we use today. Therefore, harnessing human energy can do us more good than harm.

From

John Joe.

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Answer:

T = 643K = 643-273.15 = 369.85°C = 370°C = maximum safe operating temperature

Explanation:

The actual question has following data which the question given has missing

The vessel is a stainless-steel cylinder that measures wide 25.0 cm and 30.0 cm high.

The maximum safe pressure inside the vessel is 6.60 MPa.

The vessel may contain up to 0.800 kg of carbon monoxide gas.

Volume of cylinder = pi x r^2 x h  = 3.14 x (25/2)cm^2 x 30cm = 14725.78 cm^3 or 0.01472578 m^3

Now, using ideal gas law, PV = nRT

P = 6.60×10^6 Pa

V = 0.01472578 m^3

n= no. of moles = mas staken/ molar mass of CO2 = 800g/44g/mol = 18.18

moles

R =  8.314 J/mol.K

So, (6.60x10^6 ) x 0.01472578  = 18.18×8.314×T

T = 643 K = 643-273.15 = 369.85°C = 370°C = maximum safe operating temperature

The mass of silver chloride produced when 2 mole of silver nitrate is reacted with 2 moles of nickel (II) chloride is 286.64g.

Stoichiometry is the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).

According to this question, 2 moles of silver nitrate is reacted with 2 moles of nickel (II) chloride to produce silver chloride and nickel nitrate.

Based on the balanced equation, 2 moles of silver nitrate produces 2 moles of silver chloride.

Molar mass of silver chloride = 143.32g/mol

mass = 143.32 × 2 = 286.64g

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Answer:

C) Atoms

Explanation:

Hope that helped :)

Answer:

Answer:

B. Potassium

Explanation:

The element with 19 electrons, 19 protons, and 20 neutrons is potassium

4.743 x \(10^{-3}\) s-1 is the value of the rate constant.

The Arrhenius equation describes the relationship between the rate of reaction and temperature for many physical and chemical reactions.

As per Arrhenius equation,

k = Ae-Ea÷RT

T = 227 = 500.15 K

R = 0.008314 kJ/K mol

Ea = 150 kJ/mol

Ea÷RT

= 150÷(0.008314 x 500.15)

= 36.073

k = Ae-36.073 = (2.2 x \(10^{13}\) s-1) (2.156 x \(10-{16}\))

k = 4.743 x \(10^{-3}\) s-1

So, the correct answer is option d) i.e. 4.7 x \(10^{-3}\) s-1

As per Arrhenius equation,

k = Ae-Ea/RT

T = 227 = 500.15 K

R = 0.008314 kJ/K mol

Ea = 150 kJ/mol

Ea÷RT = 150÷(0.008314 x 500.15) = 36.073

k = Ae-36.073 = (2.2 x \(10^{13}\) s-1)(2.156 x \(10^{-16}\))

k = 4.743 x \(10^{-3}\) s-1

Hence,  4.743 x \(10^{-3}\) s-1 is the value of the rate constant.

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The original function f(x) = 1/x becomes g(x) = 1/(x+4) - 3 after the transformation.

The correct transformation function that reflects a shift of 4 units to the left and 3 units down is g(x) = f(x+4) - 3.

This is because, in function notation, adding to the input value inside the function (x+4) shifts the function to the left, while subtracting from the output of the function (-3) shifts it down.

So, the original function f(x) = 1/x becomes g(x) = 1/(x+4) - 3 after the transformation.

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Answer:

A.parasite

Explanation:

Answer:

\(\boxed {\tt 311.15 \ K}\)

Explanation:

To convert degrees Celsius to Kelvin, use the following formula.

\(K= \textdegree C +273.15\)

Since we are trying to find 38 degrees Celsius in Kelvin, so we should substitute 38 in for degrees Celsius.

\(\textdegree C =38\)

\(K=38+273.15\)

Add 38 and 273.15.

\(K=311.15\)

38 degrees Celsius is equal to 311.15 Kelvin

Answer: here is your answer

Explanation: You are visiting your Grandmother and notice that she is eating a balanced diet, taking vitamins, getting the proper amount of sleep and is not overweight. Despite her healthy lifestyle, she appears run down and tired. You realize that it's due to her lack of physical activity. Write a convincing letter to your grandma explaining the benefits of participating in regular physical activity.

Mass Heptane : 0.348 x 17 = 5.916 kg

mass C in Heptane (MW=100.21 g/mol) :

\(\tt \dfrac{7.12}{100.21}\times 5.916=4.959~kg\)

Mass Nonane : 0.101 x 17 = 1.717 kg

mass C in Nonane (MW=128.2 g/mol) :

\(\tt \dfrac{9.12}{128.2}\times 1.717=1.446~kg\)

Mass Octane : 0.551 x 17 = 9.367 kg

mass C in Otane (MW=114.23 g/mol) :

\(\tt \dfrac{8.12}{114.23}\times 9.367=7.872~kg\)

Total mass produced :

4.959+1.446+7.872=14.277 kg

The branch of science which deals with chemicals is called chemistry.

The correct answer is 14.277 kg

The calculation part is as follows:-

\(\frac{7.12}{100.21} *5.916 = 4.959kg\)

\(\frac{9.12}{128.2} *1.717 =1.446kg\)

\(\frac{8.12}{114.23}*7.872 kg\)

Total mass-produced is

\(4.959+1.446+7.872=14.277 kg\)

Hence, the correct answer is - 14.277kg.

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The electrons, in redox reaction get partially transferred by one to another element.

A redox reaction occurs when the oxidation states of the substrate change. The loss of electrons or maybe an increase in the oxidation state of a chemical and its atoms is referred to as oxidation. The gain of electrons or a reduction in the oxidation state of either a chemical or its atoms is referred to as reduction. The oxidation as well as reduction process can be seen in same reaction which is introduced as redox reaction.

Electron can be considered as sub atomic particle which carry negative charge on it.

The given reactions are:

a. Ca(s) + Cl2(g) → CaCl2(s)

b. 4Cu(s) + O2(g) → 2Cu2O(s)

After transferring two electron in both reaction Ca and Cu it will form  CaCl2 and 2Cu2O.

Therefore, after transferring partially electrons one elements get converted into another kind of molecule

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Answer:

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Explanation:

The esterification reaction is a name reaction in organic chemistry, where it is called Fischer esterification. In addition, when the reverse reaction is promoted by using a base, it is called a saponification reaction.

Answer:

The esterification reaction is a name reaction in organic chemistry, where it is called Fischer esterification. In addition, when the reverse reaction is promoted by using a base, it is called a hydrolysis reaction.

Explanation:

The Fischer esterification is a type of organic reaction that involves the conversion of a carboxylic acid and an alcohol into an ester and water, catalyzed by an acid catalyst. This reaction is named after its discoverer, Emil Fischer, a German chemist who first described the reaction in 1895.

The general equation for Fischer esterification is:

Carboxylic acid + Alcohol → Ester + Water

For example, the reaction between acetic acid and ethanol to form ethyl acetate (a commonly used solvent and flavoring agent) can be represented as follows:

CH3COOH + C2H5OH → CH3COOC2H5 + H2O

The Fischer esterification is an important reaction in organic chemistry because esters are important compounds in a variety of applications, including the food industry (as flavorings and fragrances), the pharmaceutical industry (as intermediates in the synthesis of drugs), and the polymer industry (as monomers).

When the reverse reaction of Fischer esterification is promoted by using a base, it is called a hydrolysis reaction. Hydrolysis is the process of breaking down a compound by adding water. In the case of esters, hydrolysis occurs when the ester bond is broken by the addition of water, yielding a carboxylic acid and an alcohol.

The general equation for hydrolysis of an ester is:

Ester + Water → Carboxylic acid + Alcohol

For example, the hydrolysis of ethyl acetate can be represented as follows:

CH3COOC2H5 + H2O → CH3COOH + C2H5OH

Hydrolysis of esters is an important reaction in organic chemistry because it is a common route for the degradation of esters in nature, as well as in many industrial processes where it is used for the production of carboxylic acids and alcohols.

Answer:

To determine the identity of metal X, we need to compare the standard reduction potentials of the possible metals with the standard reduction potential of the Mg half-reaction.

From Table 18.1, we can find the standard reduction potentials for each of the metals listed:

Pb: -0.13 V

Zn: -0.76 V

Ni: -0.25 V

Fe: -0.44 V

Mn: -1.18 V

The reduction half-reaction for the Mg electrode is:

Mg2+ + 2e- → Mg E° = -2.37 V

The overall reaction for the galvanic cell is:

Mg(s) + X2+(aq) → Mg2+(aq) + X(s)

The standard cell potential is given by:

E°cell = E°(cathode) - E°(anode)

where the cathode is the reduction half-reaction and the anode is the oxidation half-reaction.

Substituting the given values, we get:

1.61 V = E°(X2+/X) - (-2.37 V)

Simplifying, we get:

E°(X2+/X) = 1.61 V + 2.37 V = 3.98 V

Comparing E°(X2+/X) with the standard reduction potentials in Table 18.1, we see that only zinc (Zn) has a reduction potential that is more negative than 3.98 V. Therefore, the metal X is zinc (Zn).

Therefore, the answer is (b) Zn.

Answer:

e. The lipid bilayer is a permeability barrier for integral membrane proteins.

Explanation:

Integral membrane proteins enter the lipid bilayer by translocon channel which gives nascent polypeptide segment a chance to partition itself into lipid bilayer hydrophobic core.

Answer:

Organs of the male productive system are the scrotum, spermatic ducts, sex glands, and penis. They coinside to produce sperm, gametes, and semen.

Explanation:

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Answer:

Here's ya idea: Can the food we eat affect our heart rate?

Explanation:

Only Ag2CO3 will precipitate from the solution.

When Na2CO3 is added to the solution, it will react with the Ag^+ and Pb^2+ ions to form precipitates of Ag2CO3 and PbCO3. The Mn^2+ ion concentration is not high enough to form a precipitate with Na2CO3.

First, let's calculate the initial concentration of Ag^+ and Pb^2+ ions in the solution:

Ag^+: 0.00050 M

Pb^2+: 0.00050 M

Next, we need to calculate the concentration of Na2CO3 after it is added to the solution. Since we added 10.00 ml of 1.0*10^-6 M Na2CO3 to a total volume of 500 ml, the final concentration of Na2CO3 is:

[Na2CO3] = (10.00 ml / 500 ml) * 1.010^-6 M

[Na2CO3] = 2.010^-8 M

Now we can use the Ksp values to determine which precipitates will form.

For Ag2CO3:

Ksp = [Ag^+]^2[CO3^2-]

8.110^-12 = (2x)^2 (2x)

8.110^-12 = 4x^3

x = 2.0*10^-4 M

Since the concentration of CO3^2- is higher than the solubility product, Ag2CO3 will precipitate.

For PbCO3:

Ksp = [Pb^2+][CO3^2-]

7.410^-14 = (0.00050 M)(2x)

x = 9.210^-11 M

Since the concentration of CO3^2- is lower than the solubility product, PbCO3 will not precipitate.

Therefore, the only precipitate that will form is Ag2CO3.

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Answer:

To find the percentage by weight of oxygen in the gaseous compound, we need to first find the weight of the compound that is not oxygen. We can do this by subtracting the weight of the oxygen from the total weight of the compound: 50.0 grams - 30.0 grams = 20.0 grams.

Next, we need to divide the weight of the oxygen by the total weight of the compound and multiply the result by 100% to express the answer as a percentage: 30.0 grams / 50.0 grams * 100% = 60.0%.

Therefore, the percentage by weight of oxygen in the gaseous compound is 60.0%.

Explanation:

Answer:

The electric force acting at a distance can be observed when someone rubs a glass rod with something woolen then the rod is taken away from the woolen material. The piece of paper leaps into air and sticks on to the rod. This is due to the electrostatic force of attraction that the paper sticks on the glass rod.

Explanation:

Answer:

Pam rubs a glass rod with wool, then moves the rod over a pile of small paper scraps. The scraps leap into the air and stick to the rod.

For Test One, phenotype ratio is Short fur : Long fur = 2 : 0; For Test Two, the phenotype ratio is Short fur : Long fur = 3 : 1; For Test Three, the phenotype ratios will be Short fur : Long fur = 0 : 2

For Test One:

Parent 1: FF (homozygous dominant for short fur)

Parent 2: Ff (heterozygous for short fur)

The Punnett square for this cross will give the following genotype ratios:

FF : Ff = 1 : 1

And the corresponding phenotype ratios will be:

Short fur : Long fur = 2 : 0 or 100% short fur

For Test Two:

Parent 1: Ff (heterozygous for short fur)

Parent 2: Ff (heterozygous for short fur)

The Punnett square for this cross will give the following genotype ratios:

FF : Ff : ff = 1 : 2 : 1

And the corresponding phenotype ratios will be:

Short fur : Long fur = 3 : 1 or 75% short fur and 25% long fur

For Test Three:

Parent 1: ff (homozygous recessive for long fur)

Parent 2: ff (homozygous recessive for long fur)

The Punnett square for this cross will give the following genotype ratios:

ff : ff = 1 : 0

And the corresponding phenotype ratios will be:

Short fur : Long fur = 0 : 2 or 100% long fur

For this investigation, the test variable is the breed of hamster and the outcome variable is the phenotype of the hamster.

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Explanation:

H is 1 mole of hydrogen

2H is 2 moles of hydrogen