How many moles of O2 are needed to fully combust 5. 67 moles of C4H10?


C4H10(l) + O2(g)→ CO2(g) + H2O(l)

Answer:

K (potassium)

Explanation:

Answer:

A lunar eclipse can only happen during a full moon.

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Explanation:

Answer:

sketching a diagram of a new medical device (b)

Explanation:

its on edge technical design not d i got that one wrong

Answer:

the answer is b

Explanation: i took the test edge 2021

Answer:

independent variable - the thing you change

dependent variable - the thing you measure

control variables - the things you keep the same

According to fundamental thermodynamics, a material has more thermal energy the hotter it is. Additionally, a given substance will have more total thermal energy when present in greater quantities at a given temperature.

The heat required to raise a mole of material's heat content by precisely one degree Celsius is known as the heat capacity, or Cp. The amount of energy needed to raise a material's heat content by precisely 1°C per gram is known as specific heat, or Csp.

Amount of heat gained by water is:

q = 125.0 × 4.2 ( 25.7 - 22.5)

q = 1680 J

Here specific heat of the solid can be determined as:

q = mc(T₂ - T₁)

c = q / m (T₂ - T₁)

c = 1680 / 112.3  (25.7 - 100.0) = -0.201 J / g° C

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A manufacturer may want to develop a new food for various reasons. This can attraction health-conscious consumers and cater to the growing demand for healthier options.
Correct answer is,o improve the nutritional value of the food.

One reason could be to improve the nutritional value of the food, which would appeal to health-conscious consumers. Another reason could be to boost sales by introducing a new and unique product that stands out in the market. Lastly, developing a new food could also help save environmental resources by using sustainable ingredients or more efficient processing steps.

Another reason is to boost sales. By creating a new food product, the manufacturer can target a new market segment or offer a unique product that differentiates them from competitors, ultimately leading to increased sales. Lastly, manufacturers may develop new foods to save environmental resources. By using sustainable ingredients or adopting environmentally-friendly processing steps, manufacturers can contribute to a greener planet while appealing to eco-conscious consumers.

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Answer:

element fluorine

Explanation:

Since the noble gases are a special group because of their lack of reactivity, the element fluorine is the most reactive nonmetal. It is not found in nature as a free element. Fluorine gas reacts explosively with many other elements and compounds and is considered to be one of the most dangerous known substances.

Answer:

element fluorine

Explanation:

Since the noble gases are a special group because of their lack of reactivity, the element fluorine is the most reactive nonmetal. It is not found in nature as a free element. Fluorine gas reacts explosively with many other elements and compounds and is considered to be one of the most dangerous known substances.

Answer: Hydrogen fluoride

Explanation:

The concentration of dissolved oxygen in water depends on various factors such as temperature, pressure, and salinity.

However, in general, fresh water has a higher concentration of dissolved oxygen than saltwater. This is because the solubility of oxygen in water decreases with increasing temperature and salinity. Saltwater has a higher salt content and thus a higher ionic strength than fresh water, which decreases the solubility of oxygen in the water. Additionally, saltwater is denser than fresh water, which means that it holds less oxygen per unit volume. As a result, marine organisms have adapted to live with lower levels of dissolved oxygen compared to freshwater organisms. However, there are still areas in the ocean where the concentration of dissolved oxygen is high due to upwelling and mixing of deep ocean currents, such as in areas along the west coast of continents. Overall, freshwater environments tend to have a higher concentration of dissolved oxygen than saltwater environments.

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Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Distance = 50 Km

Displacement = 40 Km

Time = 0.5 hours

We know, speed = \( \sf \frac{distance}{time} \)

Therefore, the speed of the car

\( \sf = \frac{50}{0.5} = 100\)

We know, velocity = \( \sf \frac{displacement}{time} \)

Therefore, the velocity of the car

\( \sf = \frac{40}{0.5} = 80\)

Answer:

Answer:The speed of the car is 100 Km/h. The velocity of the car is 80 Km/h to the east.

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Doubt clarification - use comment section.

The calculated wavelength of the emitted radiation is 478 nm, which falls within this range, it is visible to the human eye. Therefore, the radiation is visible.

a.) To calculate the wavelength of radiation emitted when an electron in a hydrogen atom moves from the n = 4 to the n = 1 energy level, we need to use the Rydberg formula. The Rydberg formula is given as:   1/λ = R [1/n₁² - 1/n₂²]Where,λ = wavelength of radiation emittedR = Rydberg constant, 1.097 × 10⁷ m⁻¹n₁

= initial energy leveln₂

= final energy levelFor hydrogen atom, the value of R is 1.097 × 10⁷ m⁻¹n₁

= 4, n₂

= 1.

Substituting these values in the Rydberg formula:1/λ = 1.097 × 10⁷ [1/4² - 1/1²]1/λ

= 1.097 × 10⁷ [3/16]λ

= 4.78 × 10⁻⁷ m

= 478 nm Therefore, the wavelength of radiation emitted is 478 nm.b.) To determine if the radiation is visible or not, we need to compare its wavelength to the range of wavelengths that are visible to the human eye, which is roughly from 400 nm (violet) to 700 nm (red).Since the calculated wavelength of the emitted radiation is 478 nm, which falls within this range, it is visible to the human eye. Therefore, the radiation is visible.

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The minimum volume of 0.259 M potassium iodide solution required to completely precipitate all of the lead in 180.0 ml of a 0.120 M lead (II) nitrate solution is 167 ml.

To solve this problem, we need to use the balanced chemical equation for the reaction between potassium iodide and lead (II) nitrate:

Pb(NO3)2 + 2KI → PbI2 + 2KNO3

From the equation, we can see that 1 mole of lead (II) nitrate reacts with 2 moles of potassium iodide to form 1 mole of lead (II) iodide, which is the precipitate we want to form.

We can use this information to calculate the number of moles of lead (II) nitrate in 180.0 ml of a 0.120 M solution:

moles of Pb(NO3)2 = M × V = 0.120 mol/L × 0.180 L = 0.0216 mol

Since we need 2 moles of potassium iodide for every mole of lead (II) nitrate, we need:

moles of KI = 2 × moles of Pb(NO3)2 = 2 × 0.0216 mol = 0.0432 mol

Finally, we can calculate the volume of 0.259 M potassium iodide solution needed to provide this many moles of KI:

V = moles of KI / M = 0.0432 mol / 0.259 mol/L = 0.167 L = 167 ml

Therefore, the minimum volume of 0.259 M potassium iodide solution required to completely precipitate all of the lead in 180.0 ml of a 0.120 M lead (II) nitrate solution is 167 ml.

The closest answer from the given options is 167 mL. So, the minimum volume of 0.259 M potassium iodide solution required to completely precipitate all of the lead in 180.0 mL of a 0.120 M lead(II) nitrate solution is approximately 167 mL.

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Answer:

calcium

Explanation:

IR Spectroscopy measures the vibrations of atoms, and based on this it is realizable to determine the functional groups.

CO, absorb in the IR spectrum. More compound molecules have many bonds, and their fluctuation spectra are correspondingly more composite, i.e. big molecules have many peaks in their IR spectra., stronger bonds and light atoms will vibrate at a high extended frequency

Nature rules that only bonds that carry dipoles can absorb infrared light. C-C bonds are normally nonpolar and usually do not show up as summit in the IR spectrum.

So we can conclude that The chart above shows a spectrum in transmission mode.

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The concentration of Co²⁺ ions at equilibrium is 0.150 M.

To determine the concentration of Co²⁺ ions at equilibrium, we need to consider the reaction between CoCl₂ and NH₃ to form Co(NH₃)₆²⁺.

The balanced equation for the reaction is:

CoCl₂ + 6NH₃ ⇌ Co(NH₃)₆²⁺ + 2Cl⁻

We can set up an ICE (Initial, Change, Equilibrium) table to solve for the concentration of Co²⁺ ions at equilibrium.

Initially, we have 0.150 moles of CoCl₂ and 1 liter of 1.20 M NH₃ solution.

Using the stoichiometry of the reaction, we can see that for every mole of CoCl₂, we form 1 mole of Co(NH₃)₆²⁺ ions. Therefore, the concentration of Co(NH₃)₆²⁺ ions at equilibrium is equal to the initial concentration of CoCl₂.

Therefore, the concentration of Co²⁺ ions at equilibrium is 0.150 M.

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Answer

Rotating

Explanation:

The Earth is always being pulled towards the Sun by gravity.

The Earth is not moving fast enough to "escape" the Sun's gravity and leave the solar system, but it is going too fast to be pulled into the Sun. Therefore, it keeps going around and around( roating)- orbiting the Sun.

Answer:

Rotating around the sun

Answer:

1.  electrons

2. From "Y" to "X"

Explanation:

1. Electrons move between the rod since the electrons are the only charge carriers which are free to move.

2. The particles move from from "Y" to "X"  since the electrons are the only charge carriers which are free to move. The positive charge on rod x is due to a deficit of electrons while the negative charge on rod Y is due to the excess of electrons. When the rods come together, the electrons move from "Y" to "X" since the electrons are the only charge carriers which are free to move.

Answer:

Germanium has the larger atomic radius.

At a temperature of 554.3 K, a 0.00330 m solution of glucose and water has an osmotic pressure of 0.150 atm.

Osmotic pressure is a colligative property of a solution that is it is dependent on the concentration of the solution.

Osmotic pressure = icRT

where c is the concentration

R is the gas constant

T is the temperature

i is the van't hoff factor

Given,

c = 0.0033 m

R = 0.082 L atm mol⁻¹ K⁻¹

osmotic pressure = 0.150 atm

i = 1 for glucose as it neither associates nor dissociates

0.150 = 0.0033 * 0.082 * T

T = 554.3 K

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Unlike crystalline solids, amorphous substances may soften or flow over a wide range of temperatures before melting.

Crystalline solids are solids that have a highly ordered and repeating arrangement of atoms or molecules in a three-dimensional lattice structure. The atoms or molecules are arranged in a regular pattern that extends throughout the entire solid, giving it a well-defined shape and volume. Crystalline solids are characterized by a number of physical properties, including a sharp melting point, a regular arrangement of cleavage planes, and the ability to diffract X-rays in a regular pattern.

Some examples of crystalline solids include diamond, quartz, and table salt. Crystalline solids can be classified into different types based on the type of bonding between the atoms or molecules, such as ionic, covalent, metallic, and molecular crystals. The properties of crystalline solids depend on the type and strength of the bonding between the atoms or molecules, as well as their arrangement in the lattice structure. Crystalline solids have important applications in fields such as materials science, chemistry, and engineering, due to their unique physical properties and regular structure.

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Aldol reactions are indeed an essential synthetic method for forming carbon-carbon bonds in organic chemistry. Three other organic reactions that can be used to form carbon-carbon bonds are: Grignard reaction,Heck reaction and Diels-Alder reaction

1. Grignard reaction: This reaction involves the use of a Grignard reagent, which is an organomagnesium compound (RMgX), reacting with a carbonyl compound, like an aldehyde or ketone, to form a new carbon-carbon bond.

2. Heck reaction: Also known as the Mizoroki-Heck reaction, this process involves the palladium-catalyzed cross-coupling of an alkene with an aryl or vinyl halide, forming a new carbon-carbon bond in the product.

3. Diels-Alder reaction: This is a cycloaddition reaction between a conjugated diene and an alkene (dienophile) that forms a new six-membered ring, generating two new carbon-carbon bonds in the process.

These reactions, along with the Aldol reaction, are valuable tools in organic synthesis for creating carbon-carbon bonds and constructing complex molecular structures.

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Answer:

he important thing to notice is that ammonium sulfate contains 2 nitrogen atoms, each belonging to one ammonium ion, NH+4 . So, the molar mass of ammonium sulfate is 132.14 g/mol and the molar mass of nitrogen is 14.007 g/mol.

Explanation:

The concentration of the diluted solution is equal to 0.072 times the concentration of the stock solution.

To determine the concentration of the diluted solution, we need to use the equation:

C1V1 = C2V2

Where:

C1 = concentration of the stock solution

V1 = volume of the stock solution

C2 = concentration of the diluted solution

V2 = volume of the diluted solution

In this case, we have:

C1 = concentration of the stock solution (unknown)

V1 = 18.0 mL (milliliters)

C2 = concentration of the diluted solution (unknown)

V2 = 0.250 L (liters)

Since the units need to be consistent, we should convert the volume of the stock solution to liters:

V1 = 18.0 mL = 18.0 mL * (1 L / 1000 mL) = 0.018 L

Plugging the values into the equation, we have:

C1 * 0.018 L = C2 * 0.250 L

Now we can solve for C2, the concentration of the diluted solution:

C2 = (C1 * 0.018 L) / (0.250 L)

Simplifying the equation, we get:

C2 = 0.072 C1

This means that the concentration of the diluted solution is equal to 0.072 times the concentration of the stock solution.

In summary, to find the concentration of the diluted solution, you would multiply the concentration of the stock solution by 0.072. However, since the concentration of the stock solution is not provided in the question, we cannot calculate the exact concentration of the diluted solution.

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Answer:

6 gallons of gasoline for $14.45 is the best price

Explanation:

26.29/11=2.39 $ per gallon

14.45/11=1.31 $ per gallon

Distillation is a useful technique in the synthesis and reactions of alkenes as it can help increase the yield by shifting the equilibrium towards the product side.

The synthesis of alkenes involves the elimination of a leaving group from a substrate. This can be achieved through various reactions such as dehydration of alcohols, dehydrohalogenation of alkyl halides, and dehalogenation of vicinal dihalides. Once the reaction is complete, the product mixture may contain a combination of desired and undesired products, and may also be in equilibrium with the reactants. Distillation can be used to separate the desired product from the reaction mixture, which helps to shift the equilibrium towards the product side, ultimately increasing the yield.

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The specific heat of mercury calculated from her data is 0.13 J/g°C.

Specific heat is a measure of how much energy is required to heat a substance. This is the amount of energy (in joules) required to heat 1 gram of a substance by 1°C. Different substances have different specific heats.

To answer this question, use the heat slaughter formula:

Q =mCΔT

In the question:

Heat energy: Q = 30.1 J

Mass of mercury: m = 12.5 g

T1 = 21.2

T2 = 39.6°C

Temperature:

ΔT = T2 –T1

∆T = 39.6 – 21.2

∆T = 18.4°C

The specific heat of mercury is?

Q =mCΔT

C = Q/mΔT

C = 30.1/12.5 x 18.4

C =30.1/230

C = 0.13 J/g°C

So, the specific heat of mercury is 0.13 J/g°C.

Question:

In the laboratory a student finds that it takes 30.1 Joules to increase the temperature of 12.5 grams of liquid mercury from 21.2 to 39.6 degrees Celsius.

The specific heat of mercury calculated from her data is_____J/g°C.

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