If the reaction occurs with an 82. 4% yield, what mass of aluminum should be reacted with excess oxygen to produce 45. 0 grams of al2o3?.

2.5 km is the distance you can travel if a car gets 14 kilometers per liter and have 35 liters of gas.

Total distance traveled in 1 liter = 14 km

Total gas in the car = 35 liters

We have to find how much distance can be covered in in35 liters of gas.

Distance is the length of the path traveled between two points. It is the total movement of an object in a direction. It measures length.

Distance = 35/14

Or, distance = 2.5 km

Therefore, the total distance that can be covered by a car in 35 liters of gas is 2.5 km.

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Suppose we heat a 4. 31 g sample of a Na2Co3 hydrate. after thorough heating, the mass of the compound is 3. 22 g based on the data, Na₂CO₃ • 2H₂O for the hydrate we start with this formula.

Here compound are Na₂Co₃ then mass of compound is 3.22g and molar mass is 105.98g/mol

Moles of compound (anhydrate Na₂CO₃) = mass / molar mass = 3.22 g / 105.98 g mol = 0.0304 mol mass

So here compound Na₂Co₃ are given and we start with formula Na₂CO₃ • 2H₂O  for the hydrate.

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The pressure reading increases.

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit vicinity over which that pressure is distributed. Gauge stress (also spelled gage pressure)[a] is the stress relative to the ambient pressure.

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The Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex]   is formed when 25.0 ml of 0.200M AgNO[tex]_{3}[/tex] is mixed with 50.0 ml of 0.800 M Na[tex]_{2}[/tex]CO[tex]_{3}[/tex] is 0.68 g.

According the question , the chemical equation is give by :

2AgNO[tex]_{3}[/tex]   +   Na[tex]_{2}[/tex]CO[tex]_{3}[/tex]  ------->   Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex]     +      2NaNO[tex]_{3}[/tex]

Given that :

volume of silver nitrate = 25.0 ml or 0.025 L

molarity M =  0.200 M

volume of sodium carbonate = 50.0 ml or 0.050 L

molarity = 0.800 M

now, no. of moles of silver nitrate  =  0.025 × 0.200 = 0.005 moles

no. of mole of sodium carbonate = 0.050 × 0.800 =  0.04 moles

the no. of moles of silver carbonate ,  =  0.5 × 0.005

                                                                =  0.0025 moles

molar mass  of Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex] = 275.7 g/mol

therefor, the mass of Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex] =   0.0025 moles × 275.7 g/mol

                                                 =0.68 g

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If a 2.760 g sample of carbon was burned, yielding 10.120 g of carbon dioxide, the grams of oxygen taken up by the reaction was 7.360 g

The balanced equation of chemical reaction is :

C + O₂ → CO₂

Given data is-

Given mass of Carbon- 2.760 g

Amount of carbon dioxide produced- 10.120 g

The molecular mass of carbon dioxide = 44.0 g/mole

To calculate number of moles, equation used is,

 Number of moles (n) = Given mass

                                        Molar mass

            n =      10.120 g      

                      44.0 g/mole

               = 0.23 moles

So, The number of moles of oxygen produced is,

number of moles of O₂ = number of moles of CO₂

n = 0.23 moles.

Now, the molecular mass of oxygen is,

M = (2 × 16.0)g/mole = 32.0 g/mole

Mass of product = number of moles × molecular mass

m = (0.23 × 32.0) g

m = 7.360 g

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A compound that occupies a receptor, but does not activate the neuron is known as an antagonist.

A neurotransmitter receptor (also known as a neuroreceptor) is a protein on the membrane that is activated by a neurotransmitter. Chemicals on the cell's surface, such as a neurotransmitter, can bind to the membrane, and receptors can be found along the membrane.

G-protein coupled receptors are found on the majority of neurotransmitter receptors. Neurotransmitter (NT) receptors can be found on the surface of neurons and glia. One neuron sends messages to the other neuron via neurotransmitters at a synapse.

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The correct answer is 14.8%.

The given reaction,

C_6H_12O_6 ----> 2CO₂ + 2C₂H₂OH

A key idea in chemistry is stoichiometry, which determines the quantity of reactants or products in a chemical reaction and aids in understanding different reactions and the proportions in which they might take place. A combination of two Greek terms is stoichiometry. Stoicheion, which denotes an element, and metron, which denotes a unit of measurement

mole= mass/mole mass

=90g/180g/mol

=0.5mol

According to stoichiometry

1 mol glucose = 2 mol ethanol

0.5 mol C_6H_12O_6 = 1 mole ethanol

mass of ethanol = 1 mole ×46 g/ mol

Theoretical yield = 46 g

percentage = actual yield / theoretical yield × 100

=6.8 g / 46 g × 100 = 14.78% =14.8%

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Answer:

I’m not sure! Bacteria are kind of disgusting, but some of them might be helpful.

Explanation:

My opinion since I didn't get to read the article :)

If a chemical plant near the source of the river is dumping mercury, then the mercury levels should be highest at the source and lowest at the mouth.

Further testing should show that this is a commonly followed rule. Observations should be explained in a published scientific paper. Scientists look for answers to questions and solutions to problems using a process called the scientific method. This process consists of observation, hypothesis development, and experimental design. Bringing additional observations hypotheses, and experiments in repeated cycles

Chemists use the scientific method to conduct experiments formulate hypotheses formulate laws, and develop theories to better understand how the natural world behaves. In scientific thinking, hypotheses are formed before applicable research is conducted. The theory, on the other hand, is supported by evidence. This is a principle formulated as an attempt to explain what the data already support.

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Answer:

22.68

Explanation:

Since about 2.2 lbs = 1kg, 50 pounds is about 22.68.

You are given the sodium acetate, hcl (1 m), nahco3, and nahco3 we need na2co3

Here pKa Co=310.3⁴  buffer of pH =9.9

Use nahco3, and na2co3 to prepare 100mL of buffer with 0.1M of concentration here we calculate the given salt,

pH=pKa+log[salt]/[acid]  9.9=10.1+log[na2co3]/[nahco3][na2co3]/[nahco3] = 0.63

[na2co3]+[nahco3]=0.1M

0,63[nahco3]+[nahco3]=0.1 [nahco3]=0.0613M

Moles=molarity×volume=0,0613×100/1000=0.0613moles

[na2co3]=0.1-0.0613=0.938M

Moles=0.938M

Calculated moles will be prepared in buffer in 100 ml solution

Moles=mass/molecular weight

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The appropriate designation for an ion with 24 protons, 27 neutrons, and 21 electrons is [^51 Cr24].

How to represent an atom with atomic number and mass?

The smallest component of ordinary stuff that makes up a chemical element is an atom. Each neutral or ionized atom makes up a solid, liquid, gas, or type of plasma. Atoms are very small, with an average diameter of 100 picometers.

Symbolical representation is :

            [ Xz^A] or  [^A Xz]

Where,

A = Mass , X = atom, Z = Atomic number.

The quantity of protons and neutrons in an atom's nucleus is referred to as its mass number.

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Volume of Iron is therefore 7.8g/cm^3

The formula for [tex]density(\rho) = \frac{Mass(m)}{Volume(v)}[/tex]

m = 7.3g

v = 24.83ml - 23.90ml = 0.93ml

Since 1ml = 1cm^3, the new volume = 0.93/cm^3

Using the formula [tex]\\ density(\rho) = \frac{7.3g}{0.93cm^{3} } = 7.8g/cm^{3}[/tex]

Volume is a measure of occupied third-dimensional space. It is frequently quantified numerically the use of SI derived gadgets (such as the cubic meter and liter) or through a number imperial units (such as the gallon, quart, cubic inch). The definition of size (cubed) is interrelated with volume. The volume of a container is typically understood to be the capability of the container; i.e., the amount of fluid (gas or liquid) that the container may want to hold, as a substitute than the quantity of space the container itself displaces.

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The change in the internal energy of the gas is 1.5×10∧3 J.

The internal energy of an ideal gas is directly proportional to the temperature of the gas:

ΔE = 3/2 × n × R × ΔT

ΔT = 320 K - 260 K

ΔT = 60 K; change of the temperature

n = 2.0 mol: amount of a monatomic ideal gas

R = 8.1 J/mol×K;the ideal gas constant

ΔE = 3/2 × 2 mol × 8.1 J/mol×K × 60 K

ΔE = 1500 J

ΔE = 1.5×10∧3 J;  the internal energy of the gas

Isobaric process is a type of process in which the pressure of the system stays constant.

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Answer:

Thomson used creativity to interpret the results of the cathode ray tube experiment. Explain how the atomic theory was modified from Dalton's theory to Rutherford's.

Correct metal is aluminum

Martina has a sample of an unknown substance she measures the substance. its mass is 13.5 grams, and its volume is 5 cm³ so here density concept is seen.

Density = mass/volume

So 13.5/5 = 2.7

This density is same as aluminum that's why this metal is aluminum.

Aluminum is a chemical element with the symbol Al and atomic number 13  aluminum is a silvery-white, lightweight metal. It is soft and malleable. aluminum is used in a huge variety of products including cans, foils, kitchen utensils.

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Answer:Aluminum

Explanation:

Molarity of a solution prepared by dissolving 3.50 mol nacl in enough water to make 1.50 l of solution is 2.33 mol /L

Molarity is a physical quantity that describes the substance's number of moles available in the unit liter volume of the solution. A mole per liter is a measurable unit to explain molarity.

Number of moles of the NaCl is

np = 3.50 mol

The volume of the solution is np = 1.50 L

The expression for the molarity solution is cm = np/vp

At the value and get the above expression

Cm = 3.50/ 1.50

      = 2.33 mol /L

Thus the molarity of the solution is 2.33 mol /L

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Suppose that the gene for a protein 500 amino acids in length undergoes a mutation. If the mutation causes the synthesis of a mutant protein in which just one of the 500 amino acids is incorrect.

The mutation is a condition in which there are changes in the DNA and gene. These changes are due to genetic mutation and other bio factors and radiation.

The protein may be folded incorrectly. And the protein will not attain its old structure. Because denature is an irreversible process and does not get the structure of its before.

Thus, the statement is incorrect.

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Answer:

Explanation:

O2

While burning iron shavings results in a chemical change, the formation of little particles of iron shavings is a physical change.

Small bits of iron shavings being formed are an example of a physical change because they can be transformed back into nails, whereas small pieces of iron shavings being burned on a flame are an example of a chemical change since they cannot be transformed back into their original shape. Chemical change is a change in matter that modifies the chemical properties of the substance as opposed to physical change, which modifies the matter's physical characteristics.

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To prove to someone that the clear material is a mixture and not a compound, you could put the solution in a cup and then let the water evaporate. The baking soda will stay in the cup.

Baking soda is a NaHCO₃. Its chemical name of sodium bicarbonate. It is a salt of carbonates. It is used in making dishes. This is used to make cakes or other fermented foods.

Thus, you may put the solution in a cup and then let the water evaporate to demonstrate to someone that the clear substance is a mixture rather than a compound. The cup will hold the baking soda.

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Mass of water is 11.52 grams.

Overall chemical equation for reaction of combustion a compound containing only carbon and hydrogen:

CxHy + O₂ → xCO₂ + y/2H₂O

m(CxHy) = 7.02 g; mass of the compound

m(O₂) = 25.5 g; mass of oxygen

m(CO₂) = 21.0 g; mass of carbon dioxide

m(H₂O) = ?; mass of water

Conservation of matter states that the mass of the reactants have to be equal to the mass of the products.

m(CxHy) + m(O₂) = m(CO₂) + m(H₂O)

7.02 g + 25.5 g = 21.0 g + m(H₂O)

m(H₂O) = 32.52 g - 21.0 g

m(H₂O) = 11.52 g; mass of water

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HTQ would be the most likely daughter cell genotype if independent assortment does not occur.

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Eight atoms of carbon react with 18 atoms of hydrogen , forming only one molecule of [tex]C_{8} H_{18[/tex] is considered as violation of the law of conservation of mass .

According to the law of mass conservation , neither chemical processes nor physical changes can create or destroy mass in an isolated system . The mass of the products and reactants of a chemical reaction must be equal, in accordance with the law of conservation of mass .

The reaction occur when eight atoms of carbon react with 18 atoms of hydrogen , forming only one molecule of [tex]C_{8} H_{18[/tex] is given as .

8C +18[tex]H_{2}[/tex] → [tex]C_{8} H_{18[/tex]

Mass of reactants = 8 × 12 + 18 × 2 = 132 g

Mass of reactants = 8 × 12 + 18  = 114 g

So , mass of reactant is not equal to the mass of product .

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108.81 grams of phosphorus are present in 3.51 moles of phosphorus trichloride, PCl₃.  

The molecular formula of Phosphorus trichloride is PCl₃.

One mole of phosphorus trichloride contains one mole of phosphorus element.

The molar mass of phosphorus = 31 g.

So,

1 mole of phosphorus trichloride contains 31 g of phosphorus

Since,

1 mole PCl₃ has 31 g Phosphorus

1 × 3.51 moles PCl₃ has 31×3.51 g Phosphorus

3.51 moles PCl₃ has 108.81 g of Phosphorus

Hence,

3.51 moles of phosphorus trichloride have 108.81 grams of phosphorus present in it.

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In a phospholipid, the end of the molecule likely to face towards a nonpolar environment is end with fatty acid chain.

Phospholipids are a group of polar lipids that consist of two fatty acids, a glycerol unit and a phosphate group which is esterified to an organic molecule such as choline, ethanolamine, inositol etc. phospholipids are composed of a phosphate group, two alcohols, and one or two fatty acids. on one end of the molecule are the phosphate group and one alcohol this end is polar, i.e. has an electric charge, and is attracted to water means hydrophilic. the other end, which consists of the fatty acids, is neutral it is hydrophobic and water insoluble.

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A hydrate of cobalt(II) chloride had a mass of 238.0 g before heating. After heating, the anhydrous CoC1, weighed 130.7 g.

from above statement, we found that,

before heating cobalt(II) chloride  = 238.0g

Mass of hydrated  cobalt(II) chloride After heating = 130.7 g

Mass of water = (1238.0 - 130.7) g = 107.39g

moles H2O  = 107.39× 1 mole H2O÷18g H2O

= 5.96 mol H2O.

moles of anhydrous CoCl, remain = given mass of CoCl÷ molar mass of CoCl

=130÷94.5

= 1.375 mole

moles of CoCl₂ = given mass of  CoCl₂÷ molar mass of CoCl₂

= 130÷ 130

= 1 mole.

hydration number = moles of water÷ mole of compound

= 5.96 mol÷ 1

 = 5.96 hydration number

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The reduction of a molecule can sometimes result in the acquisition of a proton, a reaction referred to as hydrogenation.

What is hydrogenation?

Molecular hydrogen (H2) and another substance or element undergo a chemical reaction known as hydrogenation, typically in the presence of a catalyst such as nickel, palladium, or platinum. The method is frequently used to saturate or decrease organic molecules.

To turn an oil that is liquid into a solid fat. Hydrogenation, sometimes in conjunction with other procedures like interesterification or fractionation, may offer a technique to manufacture the needed fat when solid fats of the proper consistency are expensive or unavailable.

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The exact density of the water sample with volume 11.3ml and mass 11.349g  is 1.004g/ml.

Density of a solution is defined as the ration of mass of the solution to the volume of the solution. Density is measured in g/cm³ for solids, g/ml for liquids, and g/L for gases.

As per the definition of density ,we can write

Density of solution  = (Mass of the Solution / Volume of the solution)

Mass of the water sample = 11.349g

Volume of water sample = 11.3ml

Density of Water sample = (Mass of water sample/Volume of Water sample)

Density of Water sample = (11.349g / 11.3ml)

Density of Water sample = 1.004g/ml.

The exact density of the water sample with volume 11.3ml and mass 11.349g  is 1.004g/ml.

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