Write the molecular formula for maltose by adding the correct subscripts. C H O

Answer:

Example 1

palladium(II) nitrate,

Example 2

Metal catalysts such as Fe, Ni, Mo, and Co are routinely used in the manufacture of CNMs.

Explanation

The three metals used in catalytic converters — rhodium, platinum and palladium — are part of a category known as platinum group metals, or PGMs, which are known for their catalytic properties.

Answer:

Decreases

Explanation:

Answer: A) Volume of a gas B) Number of molecules C) temperature &pressure

Explanation: The law also states that the Kelvin temperature and the volume will be in direct proportion when the pressure exerted on a sample of a dry gas is held constant.

The solubility of\(LaF_3\) in water is 3.04 x 10^-6 mol/L.

The solubility of \(LaF_3\) in water can be determined using the Ksp expression:

\(Ksp = [La^{3+}][F^-]^3\)

Where \([La^{3+}]\)and \([F^-]\) are the molar concentrations of the \(La^{3+}\) and \(F^-\) ions in the solution.

Since each \(LaF_3\) formula unit dissociates into one \(La^{3+}\) ion and three \(F^-\) ions, the molar solubility of \(LaF_3\) can be represented as x. Thus, the molar concentrations of \(La^{3+}\) and \(F^-\) ions in the solution can be written as x and 3x, respectively.

Substituting these values into the Ksp expression gives:

Ksp = x*(3x)^3 = 27x^4

Now, we can solve for x:

x = (Ksp/27)^(1/4)

= (2 x 10^-19 / 27)^(1/4)

= 3.04 x 10^-6 mol/L

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Answer:

12

Explanation:

it's because the question is ,,,the balance of a and c if u count the letter a its equal to 14 then if u count the letter c its equal to 10 so the letter a give to letter c a 2 that's why we can balance into 12 the letter a become 12 and letter c become 12 also.

Answer:

Explanation:

As the earth revolves around the sun, and the moon revolves around the earth, the intensity of sunlight hitting the moon changes over time. This explains why we get the phases of the moon. The answer as to why, is because the moon was moving towards a state of being a "full moon."

Answer:  determine how they break

Explanation:

hope this helps!

Answer: 2  

Explanation:

The correct answer is 76.9 g of \(Cl_{2}\) is required to react with 19.5 g of \(Al\). Therefore, the correct option is: 76.9 g.

What is Atomic Mass?

Atomic mass, also known as atomic weight or relative atomic mass, is a measure of the mass of an atom of a chemical element. It is expressed in atomic mass units (amu) or unified atomic mass units (u). Atomic mass is a weighted average mass of the naturally occurring isotopes of an element, taking into account their relative abundances.

The balanced chemical equation for the reaction is:

\(2Al\) (s) + 3\(Cl_{2}\) (g) → \(Al_{2}\)\(Cl_{6}\)

From the equation, we can see that the molar ratio between \(Al\)and Cl2 is 2:3. This means that 2 moles of \(Al\) react with 3 moles of \(Cl_{2}\)

To find out how many grams of \(Cl_{2}\) are required to react with 19.5 g of \(Al\) we need to convert the given mass of \(Al\) to moles using its molar mass, and then use the mole ratio from the balanced equation to calculate the amount of \(Cl_{2}\).

The molar mass of \(Al\) is 27 g/mol, and the molar mass of \(Cl_{2}\) is 2 * 35.45 g/mol = 70.9 g/mol.

Moles of \(Al\)= Mass of \(Al\)/ Molar mass of\(Al\)

Moles of \(Al\) = 19.5 g / 27 g/mol ≈ 0.722 mol

According to the mole ratio from the balanced equation, 2 moles of \(Al\)react with 3 moles of \(Cl_{2} .\)

Moles of \(Cl_{2}\)= Moles of \(Al\) * (3 moles of \(Cl_{2}\) / 2 moles of \(Al\))

Moles of \(Cl_{2}\) = 0.722 mol * (3/2) ≈ 1.083 mol

Now, we can convert moles of \(Cl_{2}\) to grams using its molar mass.

Mass of\(Cl_{2}\) = Moles of \(Cl_{2}\) * Molar mass of \(Cl_{2}\)

Mass of\(Cl_{2}\) = 1.083 mol * 70.9 g/mol ≈ 76.9 g

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Answer: i think its empirical

Explanation:

The percentage composition by mass of the elements in the compound are:

Ai. The percentage composition by mass of Na in 3.65 g of NaF is 54.8%

Aii. The percentage composition by mass of F in 3.65 g of NaF is 45.2%

Bi. The percentage composition by mass of Zinc in the compound is 67.1%

Bii. The percentage composition by mass of Sulfur in the compound is 32.9%

Percentage composition by mass of an element in a compound can be obtained by using the following formula:\(Percentage = \frac{mass of Element}{mass of compound} * 100\)

Ai. Determination of the percentage of Na in 3.65 g of NaF

Mass of Na = 2 g

Mass of NaF = 3.65 g

\(Percentage = \frac{mass of element }{mass of compound} * 100\\\\Percentage of Na = \frac{2}{3.65} * 100\)

Aii. Determination of the percentage of F in 3.65 g of NaF

Mass of F = 1.65 g

Mass of NaF = 3.65 g

\(Percentage = \frac{mass of element }{mass of compound } * 100\\\\Percentage of F = \frac{1.65}{3.65} * 100\\\\\)

Bi. Determination of the percentage composition of Zn in 48.72 g of the compound

Mass of Zn = 32.69 g

Mass of compound = 48.72 g

\(Percentage = \frac{mass of element}{mass of compound} * 100\\\\Percentage of Zn = \frac{32.69}{48.72} *100\\\\\)

Bii. Determination of the percentage composition of Sulphur in 48.72 g of the compound

Mass of Zn = 32.69 g

Mass of compound = 48.72 g

Mass of S = 48.72 – 32.69 g

Mass of S = 16.03 g

\(Percentage = \frac{mass of element}{mass of compound} * 100\\\\Percentage of S = \frac{16.03}{48.72} * 100\\\\\)

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Answer:

This question is incomplete but the completed question is below

a) Identify the chemical equation that represents what would occur if naphthalene (C₁₀H₈) is burned in the presence of O₂

b) Identify how many moles of carbon dioxide would be released from the equation in (a) if 25.0 g of naphthalene were burned in the presence of excess oxygen.

c) Explain what would happen if only 1 mole of oxygen gas were available to interact with naphthalene in this reaction.

The answers to the questions are below

Explanation:

a) The chemical reaction here will be a combustion reaction. A combustion reaction involves the burning of a substance (in this case an organic compound) in excess oxygen to produce carbon dioxide and water.

The balanced equation below shows what will happen when naphthalene (C₁₀H₈) is burned in the presence of O₂

C₁₀H₈ + 10O₂  ⇒  10CO₂ + 4H₂O

b) The mass of naphthalene (C₁₀H₈) from the equation above is

when C= 12 and H = 1; C₁₀H₈ = (10 × 12) + (1 × 8) = 128 g

Mass of C₁₀H₈ from the equation in (a) above is 128 g

If 128g of C₁₀H₈ ⇒ 10 moles of CO₂

25g of C₁₀H₈ ⇒ X moles of CO₂

where X is the unknown

X = 25 × 10/128

X = 1.95 moles of CO₂

1.95 moles of CO₂ would be released from the equation in (a) if 25.0 g of naphthalene were burned in the presence of excess oxygen

(c) If just 1 mole of oxygen gas was available for the reaction in (a) above, the reaction would have been an incomplete combustion. An incomplete combustion is the process in which a substance burns in insufficient oxygen to produce carbon monoxide (CO) and water.

Answer:

ZnS

Explanation:

Answer:

the chemical formula for zinc iii is ZnS

Answer:

He wants to explain why he started cooking

Explanation:

I did the I-ready and got it correct

Answer:

its d

Explanation:

When two solutions are mixed, the concentration of the resulting solution will depend on the volumes and concentrations of the two original solutions.

The final concentration can be calculated using the following formula:

Cfinal = (C1V1 + C2V2) / (V1 + V2)

where C1 and C2 are the concentrations of the two solutions, V1 and V2 are their volumes, and Cfinal is the concentration of the final solution.

In this case, one solution has a concentration of 2.00 M, and the other has a concentration of 4.00 M. Let's assume that we have much more of the 4.00 M solution, and that we mix 100 mL of the 2.00 M solution with 400 mL of the 4.00 M solution. We can calculate the resulting concentration of the mixed solution as follows:

Cfinal = (2.00 M x 100 mL + 4.00 M x 400 mL) / (100 mL + 400 mL) = 3.20 M

Therefore, a possible concentration of the final solution is 3.20 M. The actual concentration of the mixed solution will depend on the volumes and concentrations of the original solutions used.

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Answer:

The correct answer is 0.6 mL.

Explanation:

We use the mathematical expression:

Ci x Vi = Cf x Vf

Where Ci is the initial concentration (5 M); Cf and Vf refers to final concentration (0.002 M) and final volume (1500 mL). With the given data, we calculate the initial volume (Vi):

Vi = (Cf x Vf)/Ci = (0.002 M x 1500 mL)/(5 M) = 0.6 mL

Therefore, we need 0.6 mL of 5 M NaCl to prepare the solution with the requested dilution.

Answer:

1,095 x 2= $2,190

year= 365 days  

day= 1 day  

1 day = $2.00

i knew that 1 year was 365 I so i did 365x3 to get 1,095 x 2 to get how much i would spent in 3 years to get 2,190

Explanation:

cool

There are approximately 6.022 × 10^23 atoms in 12 grams of Carbon-12 (12C).

The number of atoms in a given amount of a substance can be calculated using Avogadro's number, which represents the number of atoms or molecules in one mole of a substance. Avogadro's number is approximately 6.022 × 10^23.

Carbon-12 is a specific isotope of carbon, with an atomic mass of 12 atomic mass units (amu). One mole of Carbon-12 has a mass of 12 grams. Since one mole of any substance contains Avogadro's number of particles, in the case of Carbon-12, it contains 6.022 × 10^23 atoms.

Therefore, if we have 12 grams of Carbon-12, which is equal to one mole, we can conclude that there are approximately 6.022 × 10^23 atoms in this amount of Carbon-12.

In summary, 12 grams of Carbon-12 contains approximately 6.022 × 10^23 atoms. Avogadro's number allows us to relate the mass of a substance to the number of atoms or molecules it contains, providing a fundamental concept in chemistry and enabling us to quantify and understand the microscopic world of atoms and molecules.

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Answer:2.71g/cm3

Explanation:

Conduction is the transfer of thermal energy through direct contact. Convection is the transfer of thermal energy through the movement of a liquid or gas.

So I think you should go with the 3rd option.

Hope this was helpful.

Answer:

What the other guy said

Explanation:

Answer: The mass of potassium bromide that must be dissolved in the same mass of X to produce the same depression in freezing point is 58.2 grams

Explanation:

Depression in freezing point is given by:

\(\Delta T_f=i\times K_f\times m\)

\(\Delta T_f=T_f^0-T_f=8.30^0C\) = Depression in freezing point

i= vant hoff factor = 1 (for non electrolyte)

\(K_f\) = freezing point constant =  

m= molality = \(\frac{\text{mass of solute}}{\text{molar mass of solute}\times \text{weight of solvent in kg}}=\frac{74.8g\times 1000}{1450g\times 89.09g/mol}=0.579\)

\(8.30^0C=1\times K_f\times 0.579\)

\(K_f=14.3^0C/m\)

Let Mass of solute (KBr) = x g

\(8.3^0C=1.72\times 14.3\times \frac{xg\times 1000}{119g/mol\times 1450g}\)

\(x=58.2g\)

Thus the mass of potassium bromide that must be dissolved in the same mass of X to produce the same depression in freezing point is 58.2 grams

I think it would be d bc water is everywhere

Answer:

B

Explanation:

Atoms of different elements have different atomic structures because they contain different numbers of protons and electrons. Here the given atomic models represent Beryllium, Be, and boron, B. The correct option is D.

An atomic model refers to the structure of an atom which comprises of a nucleus at the centre in which the protons and neutrons are present. The positively charged particles are called protons, negatively charged particles are called electrons whereas neutrons are neutral.

The number of protons or electrons in atom is known as the atomic number. The sum of number of protons and neutrons is called the mass number. Neutral atoms have equal numbers of protons and electrons.

Here 'Be' atom has 4 protons and hence its atomic number is 4, similarly 'B' atom has 5 protons and its atomic number is 5.

Thus the correct option is D.

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In an ecosystem, the  impact of soil Science to the development of Ghana's agriculture is that it provides suitable conditions for root germination and growth.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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The theoretical yield of alum is 9.66g

Mass of aluminium = 0.55g

Atomic mass = 27g/mol

Number of mole = Mass / Atomic mass

= 0.55g / 27gmol-1 = 2.03 x 10-2 mol

One mole of aluminium produces one mole of alum.

Number of mole of alum = 2.03 x 10-2mol

Molecular weight of alum = 474.4g/mol

Theoretical mass of alum = Number of mole x Molecular weight

= 2.03 x 10-2mol x 474.4gmol-1

= 9.66g

Chemical processes do not always proceed as expected on paper when they occur in the real world. Many factors will work against the creation of more product than is anticipated during an experiment. In addition to spills and other experimental errors, losses resulting from an incomplete reaction, unfavorable side reactions, etc. frequently occur. A measurement that shows how successfully a reaction has occurred is necessary for chemists. The term " theoretical yield" refers to this figure.

The amount of the product that should be produced based on stoichiometry must first be determined in order to compute the percent yield. It is known as the theoretical yield, and it represents the largest amount of product that could be produced from the specified quantities of reactants. The quantity of product that is actually yielded.

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The percent by mass of potassium chlorate in the mixture is 62.46 %

Potassium chlorate is a compound containing potassium, chlorine and oxygen, with the molecular formulation KClO₃. In its natural form, it is a white crystalline substance. After sodium chlorate, it's far the second one maximum not unusual chlorate in commercial use.

Potassium chloride, also referred to as potassium salt, is used as a medicine to treat and prevent low blood potassium. Low blood potassium may also occur due to vomiting, diarrhea, or certain medications.

A aggregate is a material made of two or more extraordinary chemical materials which are not chemically bonded. A combination is the bodily aggregate of two or greater substances wherein the identities are retained and are combined in the shape of answers, suspensions and colloids

KClO₃ + KCl = 9.47 gram   ---------  sample before heating

KClO₃ + KCl = 7.11 gram      ----------  sample mass after heating

mass of oxygen = 9.47 - 7.11 = 2.36 gram

Therefore mass of KClO₃ in an mixture is = 7.11/2 + 2.36

                                                                     = 5.915 gram

Therefore, the percent by mass of potassium chlorate in the mixture = 5.915/9.47 × 100

= 62.46 %

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answers : the mole ratio between NH3 : NH2 is 2:1

4 cups

33oz

2.1 liquid pints

1 quart

.26 gallon

Answer:

4 cups, 1000 mililiters

Explanation:

The Calvin cycle is a metabolic pathway that uses the chemical energy of the production of ATP and NADPH from the light-dependent reactions of photosynthesis. The cycle uses CO2 and Glyceraldehyde-3-phosphate molecules to make one of glucose.

The Calvin cycle is an anabolic-type metabolic pathway in which, starting from atmospheric CO2 molecules, glucose synthesis is achieved.

Therefore, we can conclude that the Calvin cycle is a metabolic pathway in which atmospheric CO2 is captured by the plant and, going through different chemical changes, forms glucose.

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