Which of the following BEST describes the main function of carbohydrates?

a
Speeding up chemical reactions
b
Fuel
c
Instructions for making proteins
d
Energy storage

When NaHCO\(_3\) completely decomposes, the mass of Na\(_2\)CO\(_3\) and H\(_2\)CO\(_3\) are 1.995g and  1.17g respectively.

It is the most fundamental characteristic of matter and one of the fundamental quantities in physics. Mass is a term used to describe how much matter is there in a body. The kilogramme (kg) is the SI unit of mass. A body's bulk remains constant at all times. only in rare instances where a significant quantity of energy is supplied to or taken away from a body.

2NaHCO\(_3\) → Na\(_2\)CO\(_3\) + H\(_2\)CO\(_3\)

moles of NaHCO\(_3\)= 3.24/84=0.038moles

According to stoichiometry  

moles of Na\(_2\)CO\(_3\) = 0.038/ 2= 0.019moles

mass of Na\(_2\)CO\(_3\) =0.019×105

                          = 1.995g

moles of H\(_2\)CO\(_3\)=  0.019

mass of H\(_2\)CO\(_3\) =  0.019×62

                         = 1.17g

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Answer:

i got u bro bro is a bit long tho

Explanation:

A. To determine the theoretical yields of each product (Na2CO3 and H2CO3) when 3.24 grams of NaHCO3 decomposes, we first need to calculate the molar masses of NaHCO3, Na2CO3, and H2CO3.

Molar mass of NaHCO3:

Na: 22.99 g/mol

H: 1.01 g/mol

C: 12.01 g/mol

O: 16.00 g/mol

Molar mass of NaHCO3 = 22.99 + 1.01 + 12.01 + (3 * 16.00) = 84.02 g/mol

Now, let's use stoichiometry to find the theoretical yields of Na2CO3 and H2CO3:

From the balanced chemical equation, we see that 2 moles of NaHCO3 produce 1 mole of Na2CO3 and 1 mole of H2CO3.

Calculate the moles of NaHCO3 in the sample:

Moles of NaHCO3 = Mass (g) / Molar mass (g/mol) = 3.24 g / 84.02 g/mol ≈ 0.0386 moles

Calculate the moles of Na2CO3 and H2CO3 that should be produced:

Moles of Na2CO3 = 0.0386 moles * (1 mole Na2CO3 / 2 moles NaHCO3) = 0.0193 moles Na2CO3

Moles of H2CO3 = 0.0386 moles * (1 mole H2CO3 / 2 moles NaHCO3) = 0.0193 moles H2CO3

Calculate the mass of each product:

Mass of Na2CO3 = Moles * Molar mass = 0.0193 moles * (2 * 22.99 g/mol + 12.01 g/mol + 3 * 16.00 g/mol) = 2.82 grams (rounded to two decimal places)

Mass of H2CO3 = Moles * Molar mass = 0.0193 moles * (2 * 1.01 g/mol + 12.01 g/mol + 3 * 16.00 g/mol) = 2.20 grams (rounded to two decimal places)

So, the theoretical yield of Na2CO3 is approximately 2.82 grams, and the theoretical yield of H2CO3 is approximately 2.20 grams.

B. If the measured mass of one of the products was 2.01 grams, it is most likely H2CO3 (carbonic acid) because its theoretical yield is close to this value (2.20 grams), while the theoretical yield of Na2CO3 is significantly higher (2.82 grams).

C. To calculate the percent yield of H2CO3 (carbonic acid), use the formula:

Percent Yield = (Actual Yield / Theoretical Yield) * 100%

Percent Yield = (2.01 grams / 2.20 grams) * 100% ≈ 91.36%

The percent yield of H2CO3 is approximately 91.36%.

Answer:

  -172.6 °C

Explanation:

You want to know the Celsius equivalent of the temperature 100.6 K.

The relation is ...

  C = K - 273.15

  C = 100.6 -273.15 = -172.55

The temperature is -172.55 °C, about -172.6 °C.

__

Additional comment

We have rounded to tenths, because that is precision of the temperature given. If you use 273 as the conversion constant, you will get -172.4.

The rate of reaction depends on various factors such as temperature, pressure and concentration.

The temperature will increase the rate of reaction in an endothermic reaction, and decrease it in an exothermic reaction.

Pressure will affect the rate of reaction for a reaction that occurs in the gas phase. Volume can also affect whether gases are present, as less volume will increase pressure.

Since we do not have data on the reaction regarding the phase of the compounds, nor on the type of reaction (Exothermic or endothermic), you cannot know how changing these conditions will affect the reaction rate.

What we do know is that as the concentration of the reactants decreases, the reaction rate decreases. We are told that the concentration of reactants is reduced by half, therefore this will be the safe option that will cause the reaction rate to decrease.

Answer: B. half the concentration of reactants

The reaction's per cent yield is  69.5%.

We must compare the actual yield of the reaction to the theoretical yield of the reaction to get the per cent yield of the reaction.

First, we need to calculate the amount of Pb reacted using the given mass of Pb:

mass of Pb = 451.4 g

The molar mass of Pb is 207.2 g/mol, so the number of moles of Pb reacted is:

moles of Pb = mass of Pb / molar mass of Pb

moles of Pb = 451.4 g / 207.2 g/mol

moles of Pb = 2.179 mol

The theoretical yield of PbO can be calculated using the molar mass of PbO:

mass of PbO = moles of PbO × molar mass of PbO

mass of PbO = 2.179 mol × 223.2 g/mol

mass of PbO = 486.6 g

Therefore, the theoretical yield of PbO is 486.6 g.

The per cent yield of the reaction is:

per cent yield = (actual yield / theoretical yield) × 100%

per cent yield = (338.4 g / 486.6 g) × 100%

percent yield = 69.5%

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Answer:

oxidize

Explanation:

the Calorimetry relationships you can find the amount of water in the calorimeter is      m = 21.3 g

given parameters

to find

The body of water

Thermal energy is the energy stored in the body that can be transferred as heat when two or more bodies are in contact. Calorimetry is a technique where the energy is transferred between the body only in the form of heat and in this case the thermal energy of the lead is transferred to the calorimeter that reaches the equilibrium that the thematic energy of the two is equal

              Q_{ceded} = Q_{absorbed}

Lead, because it is hotter, gives up energy

              Q_{ceded} = M c_{e Pb} (T₁ - T_f)

The calorimeter that is colder absorbs the heat

              Q_{absrobed} = m c_{e H_2O} (T_f - T₀)

where M and m are the mass of lead and water, respectively, c are the specific heats, T₁ is the temperature of the hot lead, T₀ the temperature of cold water and T_f the equilibrium temperature

              M c_{ePb} (T₁ - T_f) = m c_{eH2O} (T_f - T₀)

               m = \(\frac{ M\ c_{ePb} \ (T_1 - T_f)}{c_{eH_2O} \ (T_f - T_o)}\)

let's calculate

              m = \(\frac{200 \ 0.129 (176.4-56.4)}{ 4.186 \ (56.4 -21.7)}\)

              m = 3096 / 145.25

              m = 21.3 g

Using the Calorimetry relationships you can find the amount of water in the calorimeter is:

             m = 21.3 g

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Answer:c

Explanation:

it’s gained kinetic from the gravitational potential energy at the top

Explanation:

Three things are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel. There must be Fuel to burn. There must be Air to supply oxygen. There must be Heat (ignition temperature) to start and continue the combustion process.

The force of gravity points straight down, but a ball rolling down a ramp doesn't go straight down, it follows the ramp. Therefore, only the component of the gravitational force which points along the direction of the ball's motion can accelerate the ball. The other component pushes the ball into the ramp, and the ramp pushes back, so there is no acceleration of the ball into the ramp. If the ramp is horizontal, then the ball does not accelerate, as gravity pushes the ball into the ramp and not along the surface of the ramp. If the ramp is vertical, the ball just drops with acceleration due to gravity. These arguments are changed a bit by the fact that the ball is rolling and not sliding, but that only affects the magnitude of the acceleration but not the fact that it increases with ramp steepness.

1) First, let's rewrite the equation:

3 H2 + N2 ---> 2 NH3

If you need to make 467 L ammonia gas (NH3), let's find out how many moles of it do we need.

For this, we use the molar volume of gases: 22.4L/mol

So:

467 L ------ x mol

22.4 L ----- 1 mol

22.4x = 467

x = 20.8 mol of NH3

2) Now we use the proportion of the chemical equation to find out the quantity in moles of N2 (nitrogen gas):

1 mol of N2 ---- 2 mol of NH3

x mol of N2 ----- 20.8 mol of NH3

2x = 20.8

x = 10.4 mol of N2

3) Now we use the molar mass of N2 to find the quantity in grams that we need to start with:

molar mass N2 = 2x14 = 28 g/mol

Now we use the following equation:

mass = mole × molar mass

mass = 10.4 × 28 = 291.2 grams of Nitrogen Gas

Answer: 291.2 grams of Nitrogen Gas

Answer:

The health effects of ozone layer depletion is discussed below

Explanation:

. Ozone layer depletion effects improved UV radiation levels at the

Earth's covering, which is degrading to human well-being.

Negative consequences involve improvements in several varieties of

skin cancers, eye cataracts, and immune insufficiency diseases.

• Ozone layer exhaustion improves the quantity of UVB that touches the

Earth's exterior.

Calcium sulfate (CaSO4) is a chemical compound made from calcium, oxygen, and sulfur.

The major sources of calcium sulfate naturally happen are gypsum and anhydrite, which occur at many position worldwide as evaporites.

A simple procedure for preparing acicular calcium sulfate dihydrate is on condition that in which a slurry of calcium carbonate carrying 100 to 800 grams per lite of calcium carbonate is assorted with a solution of sulphuric acid carrying 80 to 500 grams per liter sulphuric acid in proportions that construct calcium sulfate.

So we can conclude that Calcium sulfate, CaSO4, is a natural happen calcium salt.

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Answer:

Double displacement reaction

Explanation:

The reaction shown is a double displacement or double decomposition reaction. It is also called a metathesis.

Answer:

He right I checked it 4

Explanation:

The concentration of the solution is 0.3 mol/L.

We know that concentration is the amount of substances that is present. We know that the concentration can be measured by the use of several units and one of the units that we can be able to use is the  mol/L.

We have that the concentration in w/w is 5.0% and this means that the mass of water in the solution is 5g. From the density of the solution;

volume = mass/density

= 5g/  1.000 g/mL

= 5 mL or 0.005 L

Number of moles of sugar = 5g/342.30 g/mol

= 0.015 moles

Concentration = Number of moles/volume

=  0.015 moles/0.005 L

= 0.3 mol/L

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Answer:

Hello There!!

Explanation:

Pure products come from and made where they are original made and raw products are just pasteurized with no added ingredients included in them.

hope this helps,have a great day!!

~Pinky~

The molecule that has unpaired electrons based on molecular orbital theory is O2.

What is Electron?

An electron is a subatomic particle with a negative charge that orbits the nucleus of an atom. Electrons have a mass of approximately 9.11 x\(10^{-31}\)kilograms and a fundamental unit of charge, which is equal to -1.602 x \(10^{-19}\)coulombs. Electrons are involved in chemical reactions and determine the chemical and physical properties of atoms and molecules. They are also involved in the production of electricity and are the basis of modern electronics.

Molecular orbital theory is a model used to explain the bonding of molecules. According to this theory, molecular orbitals are formed by the linear combination of atomic orbitals of the constituent atoms. These molecular orbitals can be bonding or antibonding in nature, and the number of electrons in the bonding and antibonding orbitals determines the stability and reactivity of the molecule.

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Answer:

3.00 L

Explanation:

PV = nRT

(82 atm × 101325 Pa/atm) V = (10 mol) (8.314 J/mol/K) (27 + 273) K

V = 0.00300 m³

V = 3.00 L

Answer:

2.15581g

Explanation:

If we triple the number of moles in the gas vessel at constant pressure, the new volume will be three times the initial volume.

According to Avogadro's law, the volume of a gas is directly proportional to the number of moles of gas present at constant temperature and pressure. Therefore, if we triple the number of moles in the gas vessel while keeping the pressure constant, the new volume will also triple.

More specifically, we can use the following formula to calculate the new volume (V2):

n1/V1 = n2/V2

Rearranging this formula to solve for V2 gives:

V2 = n2 * V1 / n1

Substituting the given values, we have:

n1 = initial number of moles

n2 = 3 * n1 (since we triple the number of moles)

V1 = initial volume

V2 = (3 * n1) * V1 / n1

Simplifying the equation, we have:

V2 = 3 * V1

Therefore, the new volume (V2) will be three times the initial volume (V1) if we triple the number of moles in the gas vessel while keeping the pressure constant.

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We have the next equation

Barium sulfate + aluminum phosphate barium phosphate + aluminum sulfate

1. We must write the skeleton equation

To write the skeleton equation we must use the next

Barium sulfate: BaSO4

aluminum phosphate: AlPO4

barium phosphate: Ba3(PO4)2

aluminum sulfate: Al2(SO4)3

Then, the skeleton equation would be

BaSO4 + AlPO4 Ba3(PO4)2 + Al2(SO4)3

2. We must balance the equation

So, if we need the same number of atoms of each type pn both sides of the equation, the balanced equations would be

3BaSO4 + 2AlPO4 Ba3(PO4)2 + Al2(SO4)3

Answer:5 to the 7th power

Explanation:

Divided 7 and y then add 4

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 5.33×10²⁴moles are in 3.21×10²⁸ molecules of Nitrogen.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample.

Given number of molecules of nitrogen=3.21×10²⁸ atoms

we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number

mole of nitrogen=given number of atoms ÷ 6.022×10²³(Avogadro number)

Substituting the values

moles of nitrogen=3.21×10²⁸ ÷ 6.022×10²³

mole of nitrogen= 5.33×10²⁴moles

Therefore, 5.33×10²⁴moles are in 3.21×10²⁸ molecules of Nitrogen.

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The name for NaCl is Sodium chloride

Salt is defined as the chemical compound that contains both a positively charged cation.and negatively charged anion.

It is formed by the reaction of acid and base is a neutralisation reaction.

Examples of salt include:

Therefore another name for salt is common salt.

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The point group of porphyrin is D4h, and the point group of H2TPP (dihydrogen tetraphenylporphyrin) is D2h.

What is porphyrin ?

Porphyrins are a group of organic compounds that have a characteristic heterocyclic macrocycle structure known as a porphyrin ring. The porphyrin ring is composed of four pyrrole subunits linked together by methine bridges. Porphyrins are widely distributed in nature, and they are essential components of many biological molecules, including hemoglobin, myoglobin, and chlorophyll.

In addition to their biological roles, porphyrins have important applications in materials science, catalysis, and medicine. For example, porphyrins can be used as photosensitizers in photodynamic therapy, a treatment for cancer and other diseases that involves the activation of light-sensitive drugs to destroy cancer cells. Porphyrins also have interesting optical and electronic properties that make them useful in the development of sensors, photovoltaic cells, and other electronic devices.

The point group of porphyrin is D4h, and the point group of H2TPP (dihydrogen tetraphenylporphyrin) is D2h.

Porphyrin has a fourfold rotation axis (C4), four twofold rotation axes (C2), two mirror planes (σh), and a center of inversion (i), resulting in the point group D4h.

H2TPP is a derivative of porphyrin, but it lacks one of the four phenyl groups. Therefore, it has only two perpendicular mirror planes (σh) and a C2 rotation axis, resulting in the point group D2h.

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Answer:

The answer to this reaction would be C-C-OH + H2.

The pressure of the gas when the temperature changes from -75.0°C to 1000.0°C will be approximately 9.51 atm.

Gay-Lussac's law states that the pressure exerted by a given quantity of gas varies directly with the absolute temperature of the gas.

It is expressed as;

P₁/T₁ = P₂/T₂

Given that:

We substitute our values into the expression above.

P₁/T₁ = P₂/T₂

P₁T₂ = P₂T₁

\(P_2 = \frac{P_1T_2}{T_1}\\ \\P_2 = \frac{1.480\ *\ 1273.15 }{198.15} \\\\P_2 = 9.51 \ atm\)

Therefore, the final pressure is 9.51 atm.

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Answer:

Explanation:

Here, we want to select the option that best describes aluminum

Aluminum is an element with atomic number 13, belonging to the 3rd period and 13th group of the periodic table

Thus, the best option that describes aluminum is that it is an element