Can two compounds be used as reactants for a synthesis reaction?

Answer:

Pb 2+ ions gain electrons at the cathode and become Pb atoms. Br - ions lose electrons at the anode and become Br atoms, which pair up to form Br 2 molecules.

This is During Electrolysis

Explanation:

The different chemicals emit different colors of light because it will depends on the energy of the photons emitted.

The color of the light emitted will depends on the energy of the photons that is emitted. The emission of the photons take place when the electron jump from the higher energy state to the lower energy state. When the electrons comes to the lower energy state it will emits photons in form of the light.

The light emitted by the photons are different for the different chemicals because no two elements will have the same set of the energy levels.

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To calculate the alveolar ventilation rate, we need to use the formula:
Alveolar ventilation rate = (tidal volume - dead space) x respiratory rate
Using the values given in the question, we can plug in the numbers:
Alveolar ventilation rate = (500 ml - 200 ml) x 15/min
Alveolar ventilation rate = 300 ml x 15/min
Alveolar ventilation rate = 4500 ml/min
Therefore, the person's alveolar ventilation rate is 4500 ml/min.

The alveolar ventilation rate (AVR) can be calculated using the tidal volume (TV), dead space, and breathing rate. In this case, the tidal volume is 500 ml, the dead space is 200 ml, and the breathing rate is 15 breaths per minute.
AVR = (TV - dead space) x breathing rate
AVR = (500 ml - 200 ml) x 15 breaths/min
AVR = 300 ml x 15 breaths/min
AVR = 4500 ml/min

So, the person's alveolar ventilation rate is 4500 ml/min.

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Answer:

a

Explanation:

A actual molecule of glucose contains six carbon atoms, twelve hydrogen atoms, and six oxygen atoms.

Answer:

B.

Explanation:

The most likely cause of earthquakes that occur in the area shown on the map is due to fault lines in the earth's crust.

Earthquakes are natural phenomena characterized by the shaking or trembling of the Earth's surface.

They occur due to the sudden release of energy in the Earth's crust along fault lines, which creates seismic waves that propagate through the Earth.

The Earth's crust is composed of several large tectonic plates that float on the semi-fluid layer of the Earth's mantle.

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Answer:

C, D

Explanation:

C: only compounds are chemically combined

D: a mixture is 2 or more substances not chemically combined

why it's NOT:

A: heterogenous mixtures have 2 or more substances that can be seen at all times (e.g. sandwich). homogenous mixtures have 2 or more mixtures that are visually indistinguishable (e.g. coffee)

B: a mixture is 2 or more substances not chemically combined

Answer: (P2/P1)=(T2/T1)

(P2/1200.0kPa)=(387/283)

P2=(387K/283K) * (1200kPa)

P2= 1641kPa

Explanation:

An Oxygen Tank has a pressure of 1200 Kpa at 283K and when temp. is increased to 378 K then pressure will be 1,602.82 kpa.

From the ideal gas equation it is clear that pressure of gas is directly proportional to the temperature, and for this question required equation will be:

P₁/T₁ = P₂/T₂, where

P₁ = initial pressure of oxygen tank = 1200 kpa

T₁ = initial temperature of oxygen tank = 283 K

P₂ = final pressure of oxygen tank = ?

T₂ = final temperature of oxygen tank = 378 K

On putting values, we get

P₂ = (1200)(378) / (283) = 1,602.82 kpa

Hence resultant pressure of the oxygen tank is  1,602.82 kpa.

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The event that usually occurs when air is cooled to its dew point temperature is the formation of dew, frost, or fog.  

When air is cooled to its dew point temperature, it reaches its maximum saturation point. In other words, the air cannot hold any more water vapor. As a result, the excess water vapor condenses into tiny water droplets, creating dew, frost, or fog. This is because as air cools, its capacity to hold moisture decreases.

When the air cools, it loses its ability to hold moisture. In humid conditions, as the temperature decreases, the dew point temperature is reached. When the temperature drops below this point, water droplets are formed from the moisture present in the air. The formation of water droplets is visible on objects such as grass, leaves, and windows, which appear wet. This process is known as dew deposition. Similarly, when the temperature drops below freezing point, frost is formed instead of water droplets. The process of condensation of water droplets results in the formation of fog.

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Answer:

2C7H6O2 + 15O2 → 14CO2 + 6H2O  

Explanation:

C7H6O2 + O2 → CO2 + H2O

Carbon is not balanced (Reactant - 7, Product - 1)

Adding 7 to CO2;

C7H6O2 + O2 → 7 CO2 + H2O

Carbon is now balanced, however hydrogen is not balanced (Reactant - 6, Product - 3)

Adding 3 to H2O;

C7H6O2 + O2 → 7 CO2 + 3 H2O

Hydrogen is now balanced, however oxygen is not balanced (Reactant - 4, Product - 3)

Since 3H2O gives an odd value of O, multiply all through by 2;

2C7H6O2 + 2O2 → 14 CO2 + 6 H2O

Oxygen is still not balanced (Reactant - 8, Product - 34)

Change 2O2  to 15O2;

2C7H6O2 + 15O2 → 14CO2 + 6H2O  

Equation is now balanced.

The concentration of 952 grams of ammonium carbonate are dissolved to make 1750 ml of solution expressed in molarity is 54.4 g/mL

(%m/v.) =mass of solute (in g.)/volume of solution (in mL.) x100.0

           = 952g. (NH4)2CO3/1750mL. x100

           = 0.544x 100

(%m/v.) = 54.4g/mL. or 54.4 percent concentration of. ammonium carbonate solution.

It is used as a leavening agent and as a smelling salt because heating it causes it to quickly degrade into gaseous ammonia and carbon dioxide. Ammonium Carbonate is an odorless, colorless, or white, crystalline (sand-like) powder. It is utilized in pharmaceutical, reagents, smelling salts, tanning, mordant dyeing, and baking powders. High levels of ammonia in the air can cause immediate burning in the eyes, nose, throat, and respiratory system as well as lung damage, blindness, or even death. Lower concentrations can make you cough and irritate your nose and throat when you breathe them in.

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H2SO4 + 2RbOH -> Rb2SO4 + 2H2O

If you want an explanation, keep reading.

In the first portion, there are two hydrogen ions and four sulfate ions.

The second portion has one rubidium ions and one hydroxide ion.

On the other side of the equation, in order to keep those two rubidiums balanced, you'll need to add a two at the beginning of the second portion, but in that process you are giving a second hydroxide value.

Back to the right side, there is there is water (H2O).

On the first portion, there were two hydrogen ions. The second portion also has two hydroxides because of the value change (adding the two to the front).

So on the fourth portion, you'd have to add another two so you could balance the four hydrogen ions (H2 and 2OH) and the two oxygen ions (2OH).

I hope this was easy to understand.

Answer:

the answer is C

Explanation:

Answer:C B

Explanation:

Answer:

50 ml of water

Explanation:

25 + 25 = 50

Thanks for points

That oil sands executive is greedy and heartless and therefore can't be trusted when she claims is Ad hominem attack. So, Option B is correct.

4-  The argument in question 4 is an example of an ad hominem attack. This is due to the argument's focus on the character of the oil sands executuive rather than the actual problem, which is how to improve the company's environmental record.

The argument holds that the executive cannot be believed when she says she wants to improve the company's environmental record because she is avaricious and callous. This is an error in logic, though, as the executive's character may not necessarily be related to the company's environmental policies.

5-  The argument in question 5 is an example of an appeal to ignorance. This is because the argument states that there is no proof that humans are causing climate change, so it must be natural causes. Just because there is no conclusive proof that humans are causing climate change, it does not mean that they are not.

The argument assumes that just because there is no evidence to the contrary, the argument must be true. This is a logical fallacy.

So, Option B is correct.

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The Final Molarity of iodide ion = (0.02 moles) / (0.1L) = 0.2M. Therefore, the final molarity of iodide anion in the solution is 0.2M.

In the given scenario, the potassium iodide is dissolved in an aqueous solution of silver nitrate. The molarity of the iodide anion can be calculated using the following formula: Molarity = (Moles of solute) / (Volume of solution in liters)Initial Molarity of silver nitrate = M₁ = Given as 0.1 M . Initial Molarity of potassium iodide = M₂ = Given as 0.2MVolume of silver nitrate solution = V₁ = Volume of the solution after adding potassium iodide = 100mL or 0.1L. Therefore, the moles of silver nitrate = M₁ x V₁ = 0.1M x 0.1L = 0.01 moles

The moles of potassium iodide = M₂ x V₂ = 0.2M x 0.1L = 0.02 moles The silver ion and the iodide ion react with each other to form a precipitate of silver iodide as shown below: Ag NO₃(a q) + KI (a q) → Ag I (s) + KNO₃ (a q)

We can see from the balanced equation that for every mole of silver nitrate, one mole of silver iodide is formed. Therefore, the number of moles of iodide ion in the solution = 0.02 moles.

Since the final volume of the solution doesn't change, the final molarity of iodide ion can be calculated as: Molarity = (Moles of solute) / (Volume of solution in liters) .

Final Molarity of iodide ion = (0.02 moles) / (0.1L) = 0.2M. Therefore, the final molarity of iodide anion in the solution is 0.2M.

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Answer

7.53% 97% if you divide it you can get the answer

Explanation:

The three state of matter are solid, liquid and gas.  Water exists in all these states as ice, liquid water, water vapor respectively. The level of energy will varies from each state where, gaseous particles possess highest energy.

Every substances are able to exhibit  three states of matter namely gas, liquid and solid. However, some are more stable in any one state more probably by origin.

Substances in solid state have molecules closely packed without a space to move apart each other. Hence, the energy of molecules in solid state is very low.

In liquid state, molecules have some space to move apart and thus they can flow and have no definite shape like solids.  Whereas in gases, molecules are far apart and they are free enough to move and thus have highest energy.

Therefore, water molecules in its vapor state is having highest energy than its liquid state and ice.

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The correct measures that should be taken when working with hydrochloric acid, HCl, are: "Always wear gloves when handling this chemical" and "always wear safety goggles when handling this chemical". Thus, Options B and C are correct.

This is because hydrochloric acid is a corrosive and strong irritant, and can cause severe damage to the eyes and skin. Therefore, it is important to always wear protective gloves and safety goggles to prevent any contact with the chemical.

Wearing any eyewear (option a) is not sufficient, as safety goggles provide more protection. Additionally, wearing gloves is not optional (option d), as it is necessary to protect the skin from contact with the acid.

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Maybe this information is helpful:

The features of the ocean floor are not permanent, and are gradually changing over time due to the movement of tectonic plates. Most of the ocean floor features from close to where the plates are shifting either towards or away from each other. Marine ecosystems are found around parts of the ocean floor features, even the Mariana Trench, which is the deepest trench in the world.

Answer:

May be third one because of the formation of H2(hydrogen)on the product side.

The equation that shows the valued combustion reaction is \(C_2H_4 + 3O_2 \rightarrow 2CO_2 + 2H_2O\)

The following information should be considered:

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Answer:

its both because your hight can change if u do exercises

Hope it helped.

Answer:

Explanation:

Cause of conductivity: The delocalised electrons are free to move through the structure, so graphite can conduct electricity.

Cause of being soft: The carbon atoms in graphite are linked in a hexagonal network which forms sheets that are one atom thick. These sheets are poorly connected and easily cleave or slide over one another if subjected to a small amount of force. This gives graphite its very low hardness, its perfect cleavage, and its slippery feel.

:)

The allotropes of carbon are diamond and graphite. The allotropes can have same or different physical or chemical properties. Therefore delocalized electrons and hexagonal sheets are the reason for graphite's electrical conductivity and softness.

Allotropy is a property by which an element exist in more than one form. The different forms of element are called allotropes.

The features of graphite are :

1.Graphite form strong covalent bonds.

2. Graphite has delocalized electrons but they don't have metallic bonding.

3. There are total four electrons per carbon but only three electrons are available for covalent bond. One electron per carbon is responsible for delocalization.

4. Graphite forms a giant structures.

Graphite has delocalized electrons, this is the reason for electrical conductivity. The structure of graphite contains hexagonal shaped sheets which glides over one another, this is the reason for their softness.

Therefore delocalized electrons and hexagonal sheets are the reason for graphite's electrical conductivity and softness.

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Answer:

The heating of the Earth's surface and atmosphere by the sun drives convection within the atmosphere and ocean. This convection produces winds and ocean currents. The greater the pressure differences between a low-pressure area and a high-pressure area, the stronger the winds

Answer:

1 atmospheric pressure = 760.0 mm Hg

Thus 580 mm Hg = (580 mm Hg/(760 mm Hg/atm))

= 0.763 atm

Answer:

True

Explanation:

The first artificial use of a PGR was to stimulate the production of flowers on pineapple plants. They are now used widely in agriculture. Plant hormones are also used in turf management to reduce the need to mow, to suppress seedheads, and to suppress other types of grass.

Antifreeze is a solution that is added to the radiator's water to prevent it from freezing. Ethylene glycol is a slightly polar covalent molecule that is commonly used as antifreeze. The freezing point of a radiator solution made up of 4.00 kg water and 2.00 kg ethylene glycol is -23.2°C.

The freezing point of a solution can be found by using the equation ΔT = Kf * m. Where ΔT is the freezing point depression, Kf is the freezing point depression constant of the solvent, and m is the molality of the solute. Molality is a measure of concentration that is given as the number of moles of solute per kilogram of solvent. The freezing point depression constant of water is 1.86°C/m.Kf of ethylene glycol is 12.3°C/m.Now let's find the molality of ethylene glycol. The number of moles of ethylene glycol in 2.00 kg is:moles = mass/molar mass = 2000/62 = 32.26The number of moles of water in 4.00 kg is:moles = mass/molar mass = 4000/18 = 222.22The molality of the solution is given by: molality = moles of solute / kg of solventmolality = 32.26 / (4.00 kg + 2.00 kg) = 4.54 mol/kgUsing the equation above, we can find the freezing point depression:ΔT = Kf * m = 12.3°C/m * 4.54 mol/kg = 55.962°CNow we can find the freezing point of the solution:Freezing point = 0°C - ΔT = 0°C - 55.962°C = -55.962°CThe solution would freeze at -55.962°C which is not suitable for a car's cooling system. Therefore, people add antifreeze to the water in the radiator to prevent it from freezing.

The freezing point of a radiator solution made up of 4.00 kg water and 2.00 kg ethylene glycol is -23.2°C.

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In the most elaborate Neanderthal burials discovered, the bodies were placed in a unique position called the flexed position.

Neanderthals, an extinct species of ancient humans, demonstrated cultural practices related to burying their dead. Archaeological evidence suggests that they engaged in intentional burial rituals, with varying degrees of complexity. In some cases, Neanderthals buried their dead in shallow graves, while in more elaborate instances, the bodies were placed in flexed positions, often with accompanying grave goods. This suggests a recognition of the deceased's significance and possibly reflects a belief in an afterlife or a symbolic gesture of respect. Such burial practices indicate that Neanderthals possessed a level of social and cognitive sophistication, challenging previous notions of their cultural capabilities.

So, the sentence is complete as follows "In the most elaborate Neanderthal burials discovered, the bodies were placed in a unique position called the flexed position." This refers to the position where the limbs are bent, and the body is brought into a fetal position, likely indicating a cultural tradition of care and respect for the dead.

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To synthesize each compound from (CH3)3CH, the following are the answers:

a. (CH3)3CBr: To synthesize (CH3)3CBr from (CH3)3CH, one needs to react (CH3)3CH with HBr acid or a brominating agent, for instance, PBr3, thionyl bromide, or red phosphorus and bromine. (CH3)3CBr is a tertiary halide that forms as a result of the reaction.

b. (CH3)2C=CH2: To synthesize (CH3)2C=CH2, one needs to perform double elimination reaction with H2SO4 and HI. This yields (CH3)2C=CH2.

c. (CH3)3COH: (CH3)3COH is a tertiary alcohol produced by reacting (CH3)3CH with a powerful oxidizing agent, such as potassium permanganate (KMnO4). The reaction produces three equivalents of acetone.

d. (CH3)2C(CI)CH2CI: In order to synthesize (CH3)2C(CI)CH2CI, one needs to react (CH3)3CH with a strong halogenating agent, such as phosphorus trichloride (PCI3) or phosphorus pentachloride (PCI5). The reaction yields a tertiary chloride.

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The correct answer is the amount of sodium chloride needed to make this eye solution isotonic with tears is approximately 1.85 grams. Rounding it up to the nearest whole number gives us the answer as 2. Hence, the correct option is 22.

The given solution is a hypotonic solution as the solution's tonicity is lower than that of the tears. The tears contain 0.9% w/v of NaCl, which is isotonic with tears. So, to make the given solution isotonic, the amount of sodium chloride needs to be added.

The concentration of NaCl in tears is 0.9% w/v. Additional Information: We know that % w/v is the amount of solute present in grams per 100 ml of the solution. Therefore, 0.9% w/v means 0.9 grams of NaCl is present in 100 mL of tears.

To make 30 ml of isotonic solution, we can use the following formula: Equivalent weight of NaCl = 58.5/2 = 29.25 (as NaCl ionizes to give Na+ and Cl- ions)Moles of NaCl required to make 30 ml isotonic solution = 0.9 × 30 / 1000 = 0.027Moles of Na+ and Cl- ions present in 30 mL of isotonic solution = 2 × 0.027 = 0.054

A number of grams of NaCl needed to prepare 30 mL of isotonic solution is calculated as follows:0.054 g = (0.027 x 29.25 x X) / 1000Where X is the amount of NaCl required to make 30 mL isotonic solution. Solving this equation gives us: X = 1.85 g (approx). Therefore, the amount of sodium chloride needed to make this eye solution isotonic with tears is approximately 1.85 grams. Rounding it up to the nearest whole number gives us the answer as 2. Hence, the correct option is 22.

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