what do you think would happen if you increase the substrat concentration to 40.0% hydrogen perozide

In order to maintain the accuracy of results , the tool which  is most useful for measuring 12 milliliters of saltwater is graduated pipette.

Accuracy in terms of chemistry can be defined as to how close a measurement is to the true value.There are three types of accuracy:

1) Point accuracy-It means accuracy is present at that point of scale only.It does not give any information about the accuracy of the instrument.

2)Percentage of true value--It is the accuracy  which is determined by identifying accuracy of the instrument  and comparing it with the measured true value.

3)Percentage of scale range- It is the accuracy  which determines accuracy of the measurement.

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Answer:

67.8%

Explanation:

La reacción de descomposición del CaCO₃ es:

CaCO₃ → CO₂ + CaO

Donde 1 mol de CaCO₃ al descomponerse produce 1 mol de CO₂ y 1 mol de CaO.

Usando la ley general de los gases, las moles de dioxido de carbono son:

PV = nRT.

Donde P es presión (1atm), V es volumen (20L), n son moles de gas, R es la constante de los gases (0.082atmL/molK) y T es temperatura absoluta (15 + 273.15 = 288.15K). Reemplazando los valores en la ecuación:

PV / RT = n

1atmₓ20L / 0.082atmL/molKₓ288.15K = 0.846 moles

Como 1 mol de CO₂ es producido desde 1 mol de CaCO₃, las moles iniciales de CaCO₃ son 0.846moles.

La masa molar de CaCO₃ es 100.087g/mol. Así, la masa de 0.846moles de CaCO₃ es:

0.846moles ₓ (100.087g / mol) = 84.7g de CaCO₃

Así, la pureza del marmol es:

(84.7g de CaCO₃ / 125g) ₓ 100 =

The reaction between acetylene gas and oxygen gas results in the formation of carbon dioxide gas and water vapor. In the given reaction, acetylene (C₂H₂) is the limiting reactant, resulting in the production of 4 moles of carbon dioxide (CO₂). The moles of acetylene used in the reaction are 1.97, leading to the formation of 3.94 moles of CO₂.

The balanced chemical equation for the reaction is:

2 H₂ + 5 O₂ -> 4 CO₂ + 2 H₂O

Using the given amounts of acetylene and oxygen:

moles of C₂H₂ = / = 3.94

moles of O₂ = / = 68.97

The limiting reactant is acetylene since it produces fewer moles of product. Therefore, only half of the acetylene will be consumed in the reaction.

moles of C₂H₂ used = 3.94 / 2 = 1.97

Using the mole ratio from the balanced equation, the moles of CO₂ produced will be:

moles of CO₂ = 1.97 mol C₂H₂ × (4 mol CO2 / 2 mol C₂H₂) = 3.94 mol CO₂

Rounding to the nearest whole number, the answer is: 4 mol CO₂.

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the chemist can report that the molar heat capacity of  \(C_{3} H_{9}N\)  is 134.0 J/mol·K (rounded to three significant digits).

To calculate the molar heat capacity of  \(C_{3} H_{9}N\) , we need to know the number of moles of  \(C_{3} H_{9}N\)  in the sample and the amount of heat absorbed by the sample. We can use the following formula to calculate the number of moles of  \(C_{3} H_{9}N\)

n = m/M

where:

n = number of moles

m = mass of \(C_{3} H_{9}N\) (809.0 mg)

M = molar mass of  \(C_{3} H_{9}N\)

The molar mass of \(C_{3} H_{9}N\)  can be calculated as follows:

M = (3 x M(C)) + (9 x M(H)) + M(N)

Using the atomic masses of the elements from the periodic table, we can calculate the molar mass of  \(C_{3} H_{9}N\)  as follows:

M(C) = 12.01 g/mol

M(H) = 1.008 g/mol

M(N) = 14.01 g/mol

M = (3 x 12.01) + (9 x 1.008) + 14.01 = 59.11 g/mol

Now we can calculate the number of moles of  \(C_{3} H_{9}N\)

n = 809.0 mg / 59.11 g/mol = 0.01368 mol

Next, we can use the following formula to calculate the molar heat capacity of  \(C_{3} H_{9}N\)

Cp = q/nΔT

We are given that q = 1834 J and we need to assume a value for ΔT. Let's assume that the temperature of the sample increased by 10.0°C (which is equivalent to 10.0 K). Then we can calculate the molar heat capacity of  \(C_{3} H_{9}N\) as follows:

Cp = 1834 J / (0.01368 mol x 10.0 K) = 134.0 J/mol·K

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Explanation:

color (intensive)

density (intensive)

volume (extensive)

mass (extensive)

boiling point (intensive): the temperature at which a substance boils

melting point (intensive): the temperature at which a substance 

density

volume

odor

temperature

mass

color

length

malleability

Answer:

B. Charges ( a slight positive charge on one end, and a slight negative charge on the other).

Answer:

10.81

Explanation:

you can see the answer at the pic

A closed terrarium is all that a biosphere bottle is. It is a superb model for the biosphere and the Earth because it is a closed system just like the Earth.

A closed terrarium is all that a biosphere bottle is. It is a superb model for the biosphere and the Earth because it is a closed system just like the Earth. Energy is freely absorbed and radiated, but no appreciable amounts of matter enter or exit.

Earth is closed system just like a terrarium. Because substance, like soil or water, cannot enter or exit them, they are closed.

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In a solution of magnesium ions and sulfate ions, if the reaction quotient is less than the solubility product, all ions remain solvated.

When the reaction quotient (Q) is less than the solubility product (Ksp), it indicates that the concentrations of the dissolved ions in the solution are below the equilibrium concentrations. In this case, the solution is not saturated and there is no excess of ions to form a precipitate. Instead, the ions continue to stay in their solvated state, meaning they are surrounded by water molecules and are dispersed evenly throughout the solution. Therefore, in the given scenario, when the reaction quotient is less than the solubility product, there is no precipitation or formation of an emulsion. All ions remain solvated in the solution.

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The value of 8D of water vapor in isotopic equilibrium with fresh water whose 8D value is -65%0 is -67.79125‰.

The expression for calculating 8D of water vapor in isotopic equilibrium with fresh water can be given by: 8D = α 8D (vapor) + (1 - α) 8D (liquid). Where,α is a fractionation factor and 8D (vapor) and 8D (liquid) are the deuterium enrichments in water vapor and liquid, respectively.

The value of α is given by:a (liquid-vapor) = 1.090So,α = (a (liquid-vapor) - 1) / (a (liquid-vapor) + 1)α = (1.090 - 1) / (1.090 + 1)α = 0.045So,8D = α 8D (vapor) + (1 - α) 8D (liquid)Given,8D (liquid) = -65‰ (‰ denotes permil, which is equal to parts per thousand)

Substitute the given values in the expression and simplify:8D = 0.045 × 8D (vapor) + (1 - 0.045) × (-65)8D = 0.045 × 8D (vapor) - 61.9258D + 2.79125 = 8D (vapor)

Therefore,8D (vapor) = 8D - 2.79125= -65 - 2.79125= -67.79125‰ (answer)Therefore, the value of 8D of water vapor in isotopic equilibrium with fresh water whose 8D value is -65%0 is -67.79125‰.

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The overall balanced equation for the transformation of bromobenzene into benzoic acid through a grignard reaction is C6H5Br + Mg + CO2 + HCl → C6H5COOH + MgBrCl.

Step 1: Formation of phenylmagnesium bromide (Grignard reagent)

Bromobenzene (C6H5Br) reacts with magnesium (Mg) in the presence of ether (dry Et2O) to form phenylmagnesium bromide (C6H5MgBr).

C6H5Br + Mg → C6H5MgBr

Step 2: Reaction with carbon dioxide (CO2)

Phenylmagnesium bromide (C6H5MgBr) reacts with carbon dioxide (CO2) to form magnesium salt of benzoic acid (C6H5COOMgBr).

C6H5MgBr + CO2 → C6H5COOMgBr

Step 3: Acidification

The magnesium salt of benzoic acid (C6H5COOMgBr) is treated with a dilute acid, like hydrochloric acid (HCl), to form benzoic acid (C6H5COOH) and a magnesium salt (MgBrCl).

C6H5COOMgBr + HCl → C6H5COOH + MgBrCl

Using Grignard reaction, the overall balanced equation for the transformation of bromobenzene into benzoic acid is:

C6H5Br + Mg + CO2 + HCl → C6H5COOH + MgBrCl

Mechanism:

1. Single-electron transfer from magnesium to bromobenzene forms a radical anion, which then reacts with magnesium to form phenylmagnesium bromide.

2. Nucleophilic attack of the phenyl group on carbon dioxide, followed by bond rearrangement, results in the formation of the magnesium salt of benzoic acid.

3. Acidification of the magnesium salt generates benzoic acid and a magnesium salt.

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The percent sugar concentration in orange soda is approximately 13.24%.

The volume of orange soda is given as 355 mL and its density is given as 1.043 g/mL. According to the nutrition label, there are 49 g of sugar in a 355 mL serving of orange soda.Using the density, we can convert the 355 mL volume into grams as follows:Volume = 355 mL; Density = 1.043 g/mL; Mass = ?To convert mL to g we need to multiply the volume with the density. Thus,Mass = Volume x Density= 355 x 1.043= 369.965 gThus, the mass of a 355 mL serving of orange soda is approximately 369.965 g.Next, we can calculate the percentage of sugar in the beverage as follows:Percent sugar concentration = (Mass of sugar / Total mass of beverage) x 100%Percent sugar concentration = (49 g / 369.965 g) x 100%Percent sugar concentration = 0.1324 x 100%Percent sugar concentration = 13.24%Therefore, the percent sugar concentration in orange soda is approximately 13.24%.

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This shows that you have insufficient moles of silver nitrate to allow for all the moles of sodium chloride to react → silver nitrate is a limiting reagent.

According to the balanced chemical equation's coefficients, 2 moles of silver (I) nitrate and 1 mole of copper combine to generate 2 moles of silver. is the limiting reactant, as silver (I) nitrate produces fewer moles of silver.

We can determine the theoretical quantity of silver chloride that can be created from one mole of silver nitrate using the molar ratios in the balancing equation:

1 mole silver nitrite x (1 mole silver chloride / 1 mole silver nitrite) = 1 mole silver chloride

In a similar manner, we may determine how much silver chloride, theoretically, can be created from 0.8 moles of sodium chloride:

0.8 mole sodium chloride x (1 mole silver chloride / 1 mole sodium chloride) = 0.8 mole silver chloride

Sodium chloride is the limiting reactant because the predicted yield of silver chloride is smaller for sodium chloride (0.8 mole) than for silver nitrate (1 mole).

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Answer:

Explanation:

1s22s22p6: Ne 1s22s22p63s23p3: P 1s22s22p63s23p64s1: K 1s22s22p63s23p64s23d8: Ni 1s22s22p63s23p64s23d104p65s24d3: Nb

We have that an element  indicated by its electron configuration, we can determine its Atomic number by selecting the electron represented on each orbit of the atom around the nucleus

Hence using the  Periodic table to read the its Atomic Number

The Periodic table is categorized using the atomic number of elements and symbols are  to aid search as well

For an element  indicated by its electron configuration we can determine its Atomic number by selecting the electron represented on each orbit of the atom around the nucleus

Hence using the  Periodic table to read the its Atomic Number

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Your friend is studying a specific exergonic reaction. Your friend hypothesizes that the addition of enzyme X will reduce the delta-G of this reaction, thus allowing it to proceed spontaneously.

Enzymes do not change delta-G, so this hypothesis does not fit with what is known about this reaction.

According to the second law of thermodynamics any reaction that occurs at constant temperature without input of electrical energy or photons is exergonic. An example is cellular respiration. An exergonic reaction is a chemical reaction in which the change in free energy is negative (there is a net loss of free energy). It shows a spontaneous reaction if the system is closed and the initial and final temperatures are the same. For processes that take place in a closed system at constant pressure and temperature, the Gibbs free energy is used, while the Helmholtz energy is relevant for processes that take place at constant temperature and volume.

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Your friend is studying a specific exergonic reaction. your friend hypothesizes that the addition of enzyme x will reduce the delta-g of this reaction, thus allowing it to proceed spontaneously. The hypothesis does not fit with what is known about this reaction because Enzymes do not change delta-G.

1) An exergonic reaction is a reaction that produces free energy. Because it releases energy rather than consuming it, this kind of reaction can occur naturally, unhindered by outside factors.

2) Chemical processes known as exergonic reactions have a negative change in free energy. The free energy of a system is used to calculate its overall quantity of available energy; negative changes signify energy release, whilst positive changes signify energy storage.

Only the activation energy is altered by enzyme.

This concept does not make sense given what is known about the reaction because enzymes do not alter delta G.

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Atoms having the same number of protons but a different number of neutrons are the elements have isotopes.

Isotopes are the atoms which is having the same number of protons but the different numbers of neutrons.  Isotopes having the different atomic masses. The relative abundance of an isotope is the percentage of an atoms with a specific atomic mass which is found in a naturally occurring sample of an element.  The number of protons in a nucleus will determines the element's atomic number on the Periodic Table. For example, carbon having six protons and its atomic number will be 6.

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Answer: True

Explanation: It always has the same number because the both have or are using the same product.

308g more sugar can be dissolved in 100g of water at 100°C compared to 0°C.

Based on the given solubility data for sugar, we can determine the difference in sugar solubility at 0°C and 100°C:

The difference in sugar solubility between these two temperatures can be calculated as follows:

487g (at 100°C) - 179g (at 0°C) = 308g

Therefore, 308g more sugar can be dissolved in 100g of water at 100°C compared to 0°C.

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How much more sugar can be dissolved in 100g of water at 100°C compared to 0°C?

Answer:

Carbon compounds are defined as chemical substances

Explanation:

Carbon compounds are defined as chemical substances containing carbon. More compounds of carbon exist than any other chemical element except for hydrogen.

The approximate radius of the circle the proton will make R =10 μm and the proton will experience an initial force towards the north.

The radius of the circle that the proton will make can be found using the equation for the radius of the circular path of a charged particle in a uniform magnetic field:
r = (mv)/(qB)
where r is the radius of the circle, m is the mass of the proton, v is its velocity, q is its charge, and B is the magnetic field strength.
Substituting the given values, we have:

r= \((mpv)/(qB) = (1.7x10^-27 kg)(((2K.E.)/mp))/(1.6x10^-19 C)(1.0 T)2\)\((mpv)/(qB) = (1.7x10^-27 kg)(((2K.E.)/mp))/(1.6x10^-19 C)(1.0 T)2\)
r = \(9.29x10^-5\sqrt{x}\) meters or 92.9 micrometers (approximately)

Therefore, the approximate radius of the circle the proton will make is

R = 10 μm.

To determine the direction of the force experienced by the proton, we can use the right-hand rule. If we point our thumb in the direction of the proton's velocity (due east), and our fingers in the direction of the magnetic field (upwards), then the force on the proton will be perpendicular to both and will point towards either the north or the south.

In this case, using the right-hand rule, we can see that the force on the proton will be directed towards the north. Therefore, the proton will experience an initial force towards the north.

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This problem is providing us with the isotopic mass of Ga-71 and its percent abundance, so the isotopic mass of the second isotope is required. At the end, the result turns out to be 68.92547 amu.

In chemistry, isotopes are known as atoms of an element with different atomic masses (isotopic mass) but equal number of protons. In addition, they have a natural occurring abundance as a percentage.

Thus, this problem can be solved by writing the following weighted average for the atomic mass of Gallium:

\(m_{Ga}=m_{Ga-71}*\%ab_{Ga-71}+m_{Ga-?}*\%ab_{Ga-?}\)

Hence, since both percent abundances must sum 100 %, that of the second isotope will be 60.108 %. However, since its mass is unknown, one can use the average atomic mass of Gallium consigned in the periodic table in order to write the following, after plugging in what we have so far:

\(69.723=70. 9247050 amu *0.39892+m_{Ga-?}*0.60108\)

Hence, one can solve for the unknown as follows:

\(m_{Ga-?}=\frac{69.723amu-70. 9247050 amu *0.39892}{0.60108} \\\\m_{Ga-?}=68.92547amu\)

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The initial rate of change of the concentration of H₂O is 0.10M/s. This can be calculated through stoichiometric coefficient. Thus, the correct option is B.

The given chemical equation is: CH₄ + 2O₂ → CO₂ + 2H₂O

The stoichiometry of the given equation: Δ[CH₄] = -1Δ[O₂] = -2Δ[CO₂] = 1Δ[H₂O] = 2

The formula for calculating initial rate of change of the concentration is:

Initial rate of change of the concentration = 1 / stoichiometric coefficient of the species

The stoichiometric coefficient of H₂O in the given equation is 2. Thus, the initial rate of change of the concentration of H₂O is:

Initial rate of change of the concentration of H₂O (Δ[H₂O]/Δt) = 1/2 = 0.5

Since the initial rate of change of the concentration of H₂O is a positive value, the correct option is B (0.10M/s).

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Answer:1,01

Explanation:

Answer:

saturated compounds have a large amount of solute in them, unsaturated solutions do not

Answer: C

Explanation: The evaporation rate depends on the exposed surface of liquid as long as both glasses stay at the same temperature. Since both glasses have the same surface area, they should both evaporate at the same rate.

Answer:

Liquids

Explanation:

They have a certain volume but they take the shape of their container

\(\\ \bull\sf\longmapsto Density=\dfrac{Mass}{Volume}\)

\(\\ \bull\sf\longmapsto Mass=Density\times Volume\)

\(\\ \bull\sf\longmapsto Mass=10(3)\)

\(\\ \bull\sf\longmapsto Mass=30g\)

Note that the point at which oxygen changes from liquid to gas is 90k. See the attached graph.

To plot the data, we can use a line graph with temperature (T) on the x-axis and density (d) on the y-axis. Here is a plot of the data:

From the plot, we can see that the density of oxygen decreases as the temperature increases. At around 90 K, there is a significant drop in density, indicating a change in state from liquid to gas. We can circle this temperature as the point at which oxygen changes from liquid to gas.

Therefore, we can circle the temperature 90 K as the point at which oxygen changes from liquid to gas.

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Answer:

Buoyancy is the ability or tendency of an object to float in a fluid: a liquid or a gas. This happens because fluid pressure increases with depth. According to Archimedes' Principle, the buoyant force on a submerged object is equal to the weight of the liquid displaced by the object.

Explanation: