Aluminum is used to build aero planes. Which two of its physical properties make it suitable for this use

Answer:

Lithium Bromide

Explanation:

Answer:

El bromuro de litio es un compuesto químico de litio y bromo. Su carácter higroscópico extremo hace que LiBr sea útil como desecante en ciertos sistemas de aire acondicionado.

Explanation:

Answer:

92

98

35

35

Explanation:

To calculate the flow rate of 2 L 05 NS (M) to infuse in 20 hr with a drop factor of 16 gtt/mL, we need to follow a few steps. Here's how to calculate the flow rate in gtt/min:First, we need to convert 2 L 05 NS to mL. 1 L = 1000 mL, so 2 L = 2000 mL. Since we have 50 mL left, we can add it up to get a total volume of 2050 mL.

Next, we need to calculate the total time in minutes, since the flow rate is in gtt/min. 20 hours = 20 × 60 = 1200 minutes.The formula for calculating the flow rate is: Flow rate (gtt/min) = Volume (mL) ÷ Time (min) ÷ Drop factor (gtt/mL)Now we can substitute the given values into the formula:

Flow rate (gtt/min) = 2050 mL ÷ 1200 min ÷ 16 gtt/mLFlow rate (gtt/min) = 0.10677 ≈ 0.11 gtt/min (rounded to 2 decimal places)Therefore, the flow rate of 2 L 05 NS (M) to infuse in 20 hr with a drop factor of 16 gtt/mL is approximately 0.11 gtt/min.

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Answer:

The growth of the plant

Explanation:

The growth of the plant from the bean soil is the dependent variable I believe. This is because it could change depending on many factors for e.g. the amount of light or water

Howler and warnibers is answer

Answer:

22 electrons

Explanation:

correct answer correct answer correct answer

Answer:

Nvr XD

Explanation:

Answer:

the world may never know

Explanation:

The atoms of helium are required to equalize the mass of a silver atom is 8.4 x 10 ⁻⁴⁸.

Atoms are the minute particles that are present inside elements.

Atomic mass of silver is 107.86 g/mol

Mass of one atom of silver will be

\(\dfrac{ 107.86 }{6.022 \times 10^{-23}} = 1.79 \times 10^2^4\)

Atomic mass of helium is 6.941

\(\dfrac{6.022 \times 10^{-23}}{4.0 \times 1.79 \times 10^2^4 } = 8.4 \times 10^{-48}\)

Thus, the atoms of helium are required to equalize the mass of a silver atom is 8.4 x 10 ⁻⁴⁸.

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Answer:

An ion with 11 protons, 11 neutrons, and 10 electrons would have a charge of 1+, also expressed as a charge of positive one or +1.

Answer: D. Reactions occur more slowly in the cold.​

Explanation:

The freezing point, in °C, of a 0.407 m solution in benzene is 3.42°C

Freezing point refers to the temperature at which a liquid freezes, and the solid and liquid phases are in equilibrium.

According to this question, a 0.407 m solution is in benzene solution. The freezing point of the solution can be calculated as follows:

∆T = K × m

Where;

∆T = 5.12 × 0.407

∆T = 2.084°C

Freezing point in benzene = 5.5°C - 2.084°C = 3.42°C

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Answer:

b, d,  -13.4

Explanation:

When self-aldol condensation occurs, it results in a β-hydroxy ketone. This β-hydroxy ketone undergoes dehydration in the presence of acid or heat to give an α,β-unsaturated ketone. The unsaturated ketone formed depends on the position of the water molecule that is eliminated during the dehydration process.The correct option among the alternatives is b) 4-methyl-4-penten-2-one.

In an aldol condensation reaction, a ketone or aldehyde acts as both the electrophile and nucleophile, and the product is a β-hydroxy ketone. When this β-hydroxy ketone is heated or treated with acid, it undergoes dehydration to form an α,β-unsaturated ketone.

Due to this, the products resulting from the dehydration of a self-aldol condensation product depend on the position of the water molecule that is eliminated during dehydration. This can be understood with the help of the given options. In option (a), water is eliminated from the α-carbon and the β-carbon, resulting in the formation of a conjugated diene that has four carbon atoms.

The conjugated diene is 4-methyl-3-penten-2-one.In option (b), water is eliminated from the β-carbon and the γ-carbon, resulting in the formation of a conjugated diene that has five carbon atoms. The conjugated diene is 4-methyl-4-penten-2-one.In option (c), water is eliminated from the α-carbon and the γ-carbon, resulting in the formation of a conjugated diene that has six carbon atoms. The conjugated diene is 4-methyl-5-hexen-2-one.

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When the cyclist goes downhill, their energy increases and their potential energy decreases At the same time, they move down faster and their energy increases. The matchup of the images is given in the image attached.

If PE is lowest, this means the cyclist is at the lowest point, like at the bottom of a hill or in a valley. Right now, the cyclist has the lowest amount of potential energy due to gravity because they are the closest to the ground.

Therefore, when a cyclist goes uphill, their energy decreases but their potential energy increases.

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Answer: The prefix of oxygen will be di-.

If oxygen and carbon dioxide act as ideal gases, then the volume of carbon dioxide produced is 0.5 L.

To calculate the volume of carbon dioxide produced, we need to write the balanced reaction equation for carbon monoxide combustion:

\(2CO + O_{2}\) → \(2CO_{2}\)

Assuming standard temperature and pressure and that all the gases involved act as ideal gases, 1 mole of gas will have a volume of 22.4 L

22.4 L : 1 mol = 250 mL : X

X = 1 mol * 0.25 L / 22.4 L = 0.0112 mol

Because 1 mol of oxygen produces 2 moles of carbon dioxide, then 0.0112 mol of oxygen produces 2 * 0.0112 mol = 0.0224 mol of carbon dioxide. The volume of carbon dioxide produced is:

0.0224 * 22.4 L = 0.5 L  

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Answer:

1.57694 L

Explanation:

To convert from mL to L, you simply divide the value by 1000.

Answer:One mole of HBr has 6.02 x 1

0

23

molecules of HBr.

1 mole of HBr = 6.02 x 1

0

23

molecules of HBr.-----(a)

X mole of HBr has 1.21 x

10

24

molecules of HBr.

X mole of HBr = 1.21 x

10

24

molecules of HBr------(b)

Taking ratio of (a) and (b)

X / 1 = 1.21 x

10

24

/ 6.02 x 1

0

23

X= 2.009 moles.

Explanation:

Answer:

FREE POINTS CUZ I DON'T UNDERSTAND

Explanation:

Answer

1.50 mol

Explanation

Given:

Initial volume, V₁ = 25.0 L

Mass of CH4 gas in 25.0 L container = 40 g

Final volume, V₂ = 15.0 L

From the Periodic Table; molar mass of CH4 = 16.04 g/mol

What to find:

The new amount in mole.

Step-by-step solution:

According to Avogadro’s law: For a confined gas, the volume (V) and number of moles (n) are directly proportional if the pressure and temperature both remain constant. That is:

n₁ = Mass/Molar mass = (40.0g/16.04 g/mol) = 2.493765586 mol

n₂ is the new amount in mole and can be calculated as follows:

The new amount in moles is 1.50 moles

First of all, Z is unknown. I hope it is a mistake.

        Now, it is given that the element X has nineteen electrons. This proves that X is actually Potassium.

        As per the periodic table, both Potassium and Lithium belongs to group 1 as their valency is 1 because of the presence of only one electron in the outermost shell of electrons i.e., they lose an electron during a chemical reaction to form a stable compound. Furthermore, both are metallic.

        Magnesium belongs to group 2 and hence its valency is two, which is different from potassium though it is metallic. Similiarly, bromine belongs to group 17 and gains one electron during a reaction in contrast to potassium.

( No internal links available for reference. For clarification, check the periodic table).

Answer:

The conversion of matter from one state to another is called a phase change. This process occurs when a large amount of energy is gained or lost. Phase change also depends on factors like pressure and temperature.

A material changing its phase by a physical process is called a phase change. The phase change from solid to liquid is called melting.

The shift often happens when heat is applied or removed at a specific temperature, sometimes referred to as the substance's melting or boiling point.

The temperature at which a material transforms from a solid into a liquid is known as the melting point.

The temperature at which a material transforms from a liquid into a gas is known as the boiling point.

The type of phase transition depends on the heat transfer's direction. A material that receives heat transforms from a solid to a liquid or from a liquid to a gas.

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The reaction that is endothermic is the combustion of \(2C_{2} H_{6}\) + \(7O_{2}\) to produce \(4CO_{2}\) + \(6H_{2}O\), with a release of 2,502 kJ of energy.

Endothermic reactions are characterized by the absorption of heat energy from the surroundings, resulting in a decrease in temperature. In the given reactions, the combustion of \(2C_{2} H_{6}\) + \(7O_{2}\) to produce \(4CO_{2}\) + \(6H_{2}O\) is the only reaction that involves the absorption of energy. It releases 2,502 kJ of energy, indicating that energy is being absorbed during the reaction.

In this combustion reaction, the reactants (\(2C_{2} H_{6}\) and \(7O_{2}\)) are combined to form the products (\(4CO_{2}\) and \(6H_{2}O\)), and energy is required to break the bonds in the reactants and form new bonds in the products. This energy is supplied from an external source, making the reaction endothermic. The positive value of 2,502 kJ indicates the amount of energy absorbed during the reaction.

The other given reactions involve the release of energy and are therefore exothermic reactions.

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The complete question is:

Which reaction is endothermic?

Answer:

D Transportation it makes sence if it doesn't just re read it

a. The final temperature is 29.9°C.

b. The temperature change of the copper is 69°C.

c. The temperature change of the water is 1.7°C.

d. The energy absorbed by the water is 1892.67 J

a. To find the final temperature, we can use the principle of conservation of energy, which states that the heat lost by the copper will be gained by the water and calorimeter. The equation we can use is:

heat lost by copper = heat gained by water + heat gained by calorimeter

The heat lost by the copper can be calculated using the equation:

Q = mcΔT

where Q is the heat lost, m is the mass of copper, c is the specific heat capacity of copper, and ΔT is the change in temperature.

Q = (104 g) * (0.385 J/g°C) * (98.9°C - T)

The heat gained by the water and calorimeter can be calculated using the equation:

Q = (m_water + m_calorimeter) * c_water * ΔT

where m_water is the mass of water, m_calorimeter is the mass of the calorimeter, c_water is the specific heat capacity of water, and ΔT is the change in temperature.

Q = (63 g + 2 g) * (4.19 J/g°C) * (T - 22°C)

Setting the two equations equal to each other and solving for T, we get:

(104 g) * (0.385 J/g°C) * (98.9°C - T) = (63 g + 2 g) * (4.19 J/g°C) * (T - 22°C)

Simplifying and solving for T, we get:

T = 29.9°C

Therefore, the final temperature is 29.9°C.

b. The temperature change of the copper can be calculated using the equation:

ΔT = (Q / (m * c))

where Q is the heat lost by the copper, m is the mass of copper, and c is the specific heat capacity of copper.

ΔT = (104 g) * (0.385 J/g°C) * (98.9°C - 29.9°C) / (104 g * 0.385 J/g°C)

ΔT = 69°C

Therefore, the temperature change of the copper is 69°C.

c. The temperature change of the water can be calculated using the equation:

ΔT = (Q / ((m_water + m_calorimeter) * c_water))

where Q is the heat gained by the water and calorimeter, m_water is the mass of water, m_calorimeter is the mass of the calorimeter, and c_water is the specific heat capacity of water.

ΔT = ((63 g + 2 g) * (4.19 J/g°C) * (29.9°C - 22°C)) / ((63 g + 2 g) * (4.19 J/g°C))

ΔT = 1.7°C

Therefore, the temperature change of the water is 1.7°C.

d. The energy absorbed by the water can be calculated using the equation:

Q = (m_water * c_water * ΔT)

where m_water is the mass of water, c_water is the specific heat capacity of water, and ΔT is the temperature change of the water.

Q = (63 g) * (4.19 J/g°C) * (29.9°C - 22°C)

Q = 1892.67 J

Therefore, the energy absorbed by the water is 1892.67 J.

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Answer:

the answer is B

Explanation:

Answer:

the answer is 6.5 x 10^4

Answer:

6.5 x 10^4

Explanation:

6CO2 + 6H2O → C6H12O6 + 6O2

glucose produced = 1/6 x 23.6 = 3.93 moles

Answer:59/150

Explanation:

Answer:

Hydrogen gas (H₂) + Oxygen gas (O₂) → Water (H₂O)

Explanation:

Hydrogen reacts with oxygen to form water. The reactants are hydrogen and oxygen and the product is water.

Answer:

Word Equation:

Hydrogen + Oxygen = Water

Hydrogen gas reacts with Oxygen gas to give Water.

The chemical Reaction is as follows:

    \(2H_{2} + O_{2}\)   =>    \(2H_{2}O\)

The composition and growth method, which enable the development of BCN films predominating between insulating BN and semimetallic graphite, determine the properties of BCN thin films. The influence of synthesis settings on various BCN characteristics are investigated in this regard.

Van der Waals bonds, of which hydrogen bonding is an example, are crucial to the characteristics of water and to how it behaves in biology. Dipole-dipole interactions with bonds between hydrogen and other atoms are thought to be the cause.

Both inorganic materials like water and biological compounds like DNA and proteins include hydrogen bonding. Van der Waals attractions, which depend on tiny variations in the electron concentrations, can happen between any two or more molecules.

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The molecule produced by the Citric Acid Cycle and used by the electron transport chain is NADH. The correct option is A.

The Citric Acid Cycle, also known as the Krebs cycle or the tricarboxylic acid cycle, is a central metabolic pathway occurring in the mitochondria of cells. It plays a key role in the generation of energy by oxidizing acetyl-CoA derived from carbohydrates, fats, and proteins. During this cycle, several molecules are produced, including NADH, GTP, ATP, and CO₂.

Out of the given options, NADH is the molecule produced by the Citric Acid Cycle that is utilized by the electron transport chain (ETC). NADH is an energy-rich molecule that carries high-energy electrons derived from the breakdown of glucose and other fuel molecules. It serves as a vital electron carrier, shuttling electrons to the ETC located in the inner mitochondrial membrane.

The ETC is a series of protein complexes and electron carriers that facilitate the transfer of electrons from NADH (and another electron carrier, FADH₂) to molecular oxygen (O₂). This electron transfer generates a flow of protons across the inner mitochondrial membrane, establishing an electrochemical gradient that drives ATP synthesis through oxidative phosphorylation.

In summary, NADH is produced by the Citric Acid Cycle, and it serves as a crucial electron carrier, delivering electrons to the electron transport chain for the generation of ATP in the process of oxidative phosphorylation. Option A is the correct one.

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