help plz and can you plz use terms

Entropy of the environment and the system (ethanol and oxygen being burned) both rise during the flambeating process. The second law of thermodynamics is in agreement with this increase in entropy.

When a combustion reaction takes place, the system's entropy always goes up. Combustion processes must be spontaneous because of the interaction between an increase in entropy and a decrease in energy.

A fire is exothermic, which means that it loses energy as heat is released into the surrounding space. As the bulk of a fire's byproducts are gases, such as carbon dioxide and water vapour, the system's entropy increases during the majority of combustion episodes.

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Answer:

Question 4 is- Solubility

Question 5 is- Suspension

Hopes this helps >:D

According to the question the number of moles of CO₂(g) produced in the reaction is 1.18 mol.

Moles are small, burrowing mammals found throughout much of the world. They are classified as insectivores, meaning they are specialized in eating insects. Moles have long, cylindrical bodies, short limbs, and large, clawed feet adapted for digging. Their fur is usually black to gray, though some species may have a light brown or yellowish color. They have small eyes and ears, and their noses are long and sensitive, used to detect prey and other objects in their environment.

The ideal gas law can be used to calculate the number of moles of CO₂(g) produced in the reaction. The ideal gas law states that PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature.
Since the volume and temperature are known, we can rearrange the equation to solve for n:
n = PV/RT
At the beginning of the reaction, the pressure is 0 and the volume is 4.3 L, so the number of moles of CO₂(g) is 0.
At the end of the reaction, the pressure is 5 atm and the volume is still 4.3 L. Plugging these values into the equation gives us:
n = (5 atm)(4.3 L)/(0.08206 L·atm/mol·K)(298K) = 1.18 mol CO₂(g)
Therefore, the number of moles of CO₂(g) produced in the reaction is 1.18 mol.

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The number of moles of HCl would take to neutralize the sodium hydroxide produced is equal to 0.0152 moles.

A neutralization reaction can be defined as a chemical reaction in which an acid and base react with each other to prepare salt and water.

When HCl reacts with NaOH and the resulting salt is sodium chloride and water.

HCl    +  NaOH  →    NaCl   +   H₂O

The chemical reaction, chemical reaction of sodium metal and water gives hydrogen gas and sodium hydroxide:

\(2Na +2H_{2} O---- > 2NaOH +H_{2}\)

Given the amount of sodium metal = 0.35 g

The moles of sodium metal = 0.35/23 = 0.0152 moles

If the 2 moles of sodium produce sodium hydroxide = 2 mol

The 0.0152 moles of sodium will produce NaOH = 0.0152

Therefore, 0.0152 moles of HCl is required to neutralize 0.0152 moles of NaOH.

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Answer:

I think your correct but I'm not so sure

The compound is polar and the compound is T shaped.

We know that the Lewis structure of a compound tells us the way that electrons are arranged around a central atom in a compound. We can see that the Lewis structure would consist of the central atom and then the atoms that are surrounding the central atom of the molecule.

In any case, the valence electrons that surround each of the atoms in the compound would be shown as dots and they would surround the symbol of the elements to  which the atoms belong. We can now look up at the structure and be able to deduce what the compound can be able to look like.

The compound as shown is polar because of the fact that he compound is non symmetrical.

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Answer:

to provide food to the plant also known as glucose

The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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Answer:

A. 2Al(s) + 3Cl2(g) —> 2AlCl3(s)

B. 2Li(s) + 2H2O(l) —> 2LiOH(aq) + H2(g)

C. H2(g) + Br2(l) —> 2HBr(g)

Explanation:

A. Reaction between aluminium metal and chlorine gas.

Al(s) + Cl2(g) —> AlCl3(s)

The above equation can be balance as follow:

There are 2 atoms of Cl on the left side and 3 atoms on the right side. It can be balance by putting 3 in front of Cl2 and 2 in front of AlCl3 as shown below:

Al(s) + 3Cl2(g) —> 2AlCl3(s)

There are 2 atoms of Al on the right side and 1 atom on the left side. It can be balance by putting 2 in front of Al as shown below:

2Al(s) + 3Cl2(g) —> 2AlCl3(s)

Now the equation is balanced.

B. Reaction between lithium metal and liquid water.

Li(s) + H2O(l) —> LiOH(aq) + H2(g)

The above equation can be balance as follow:

There are 2 atoms of H on the left side and a total of 3 atoms on the right side. It can be balance by putting 2 in front of H2O and 2 in front of LiOH as shown below:

Li(s) + 2H2O(l) —> 2LiOH(aq) + H2(g)

There are 2 atoms of Li on the right side and 1 atom on the left side. It can be balance by putting 2 in front of Li as shown below:

2Li(s) + 2H2O(l) —> 2LiOH(aq) + H2(g)

Now, the equation is balanced.

C. Reaction between gaseous hydrogen and liquid bromine.

H2(g) + Br2(l) —> HBr(g)

The above equation can be balance as follow:

There are 2 atoms of H on the left side and 1 atom on the right. It can be balance by putting 2 in front of HBr as shown below:

H2(g) + Br2(l) —> 2HBr(g)

Now the equation is balanced.

The mass of glucose is 259 g

We have to note that if we are to solve the problem that we have we would have to look at the stoichiometry of the reaction and that is why we have the balanced reaction equation here.

The reaction equation is;

6CO2 + 6H2O → C6H12O6 + 6O2

Now we know that;

Number of moles of water = 4.25 g /18 g/mol

= 0.24 moles

Number of moles of CO2 = 18.0 g/44 g/mol

= 0.41 moles

Given the reaction equation;

If 6 moles of CO2produces 1 mole of glucose

0.24 moles of produces 0.24 * 6/1

= 1.44 moles

Mass of glucose =  1.44 moles * 180 g/mol

= 259 g

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Answer:

sodium atom

Explanation:

The cheetah chasing its prey has more kinetic energy than an elephant walking slowly across a field, as the kinetic energy of the cheetah is significantly higher than that of the elephant.

Kinetic energy formula is K.E. = 1/2mv² where m is the mass of the object and v is the velocity or speed of the object. Therefore, an elephant walking slowly across a field could have more kinetic energy than a cheetah chasing its prey.

If K = 3, C = 1

For the elephant:Mass, m = 5000 kg (150*33.33)

Velocity, v = 1 m/s

Kinetic energy, K.E. = 1/2mv² = 1/2 * 5000 * 1² = 2500 J

For the cheetah:Mass, m = 50 kgVelocity, v = 20 m/s

Kinetic energy, K.E. = 1/2mv² = 1/2 * 50 * 20² = 10000 J

Therefore, the cheetah chasing its prey has more kinetic energy than an elephant walking slowly across a field, as the kinetic energy of the cheetah is significantly higher than that of the elephant.

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To transfer -34.2 kJ of heat according to the balanced chemical reaction 2 KCIO3(s) → 2 KCI(s) + 3 O2(g) with AH = -89.4 kJ, approximately 0.382 moles of KCIO3 solid must be reacted.

To determine the number of moles of KCIO3 solid required to transfer -34.2 kJ of heat, we can use the given balanced chemical reaction and the enthalpy change (ΔH) of the reaction.

Given:

Balanced chemical reaction: 2 KCIO3(s) → 2 KCI(s) + 3 O2(g)

Enthalpy change (ΔH): -89.4 kJ

We can use the following steps to find the number of moles of KCIO3 solid:

1. Write the balanced chemical equation and note the stoichiometric coefficients:

  2 KCIO3(s) → 2 KCI(s) + 3 O2(g)

2. Determine the molar enthalpy change (ΔH) by dividing the enthalpy change by the stoichiometric coefficient of KCIO3:

  ΔH per mole of KCIO3 = -89.4 kJ / 2

3. Calculate the number of moles of KCIO3 required by dividing the desired heat transfer by the molar enthalpy change:

  moles of KCIO3 = -34.2 kJ / ΔH per mole of KCIO3

  Plugging in the values:

  moles of KCIO3 = -34.2 kJ / (-89.4 kJ / 2)

After performing the calculations, we find that approximately 0.382 moles of KCIO3 solid must be reacted to transfer -34.2 kJ of heat according to the balanced chemical reaction 2 KCIO3(s) → 2 KCI(s) + 3 O2(g) with ΔH = -89.4 kJ.

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Answer:

Fluid power systems perform work by a pressurized fluid bearing directly on a piston in a cylinder or in a fluid motor. A fluid cylinder produces a force resulting in linear motion, whereas a fluid motor produces torque resulting in rotary motion. Within a fluid power system, cylinders and motors (also called actuators) do the desired work. Control components such as valves regulate the system.

Answer:

12g

Explanation:

The following equation is given in this question:

2H2 + O2 → 2H2O

According to this balanced chemical equation, 2 moles of hydrogen gas is used to produce 2 moles of water molecule.

Hence, if 12 grams of hydrogen is used, 12 × 2/2 = 24/2

= 12 grams of H2O will be produced.

Answer:

The answer to your question is given below.

Explanation:

Rate is simply defined as quantity per unit time. Mathematically it is represented as:

Rate = Quantity /time

Thus, we can obtain the rate as follow:

1. Quantity = 20 sandwich

Time = 10 mins

Rate =?

Rate = Quantity /time

Rate = 20/10

Rate = 2 sandwich per mins

2. Quantity = 30 sandwich

Time = 10 mins

Rate =?

Rate = Quantity /time

Rate = 30/10

Rate = 3 sandwich per mins

3. Quantity = 40 sandwich

Time = 10 mins

Rate =?

Rate = Quantity /time

Rate = 40/10

Rate = 4 sandwich per mins

4. Quantity = 50 sandwich

Time = 10 mins

Rate =?

Rate = Quantity /time

Rate = 50/10

Rate = 5 sandwich per mins

Thus, the complete table is given as follow:

Quantity >> Unit of measure >> Rate

10 >>>>>>> 10 min >>>>>>>>>> 1

20 >>>>>>> 10 min >>>>>>>>>> 2

30 >>>>>>> 10 min >>>>>>>>>> 3

40 >>>>>>> 10 min >>>>>>>>>> 4

50 >>>>>>> 10 min >>>>>>>>>> 5

Answer:

197.98g

Explanation:

This question can be calculated using the formula: Q = mcΔT

Where Q= heat transfer

M= mass

C= specific capacity

ΔT= change in temperature

Heat from the copper metal is lost to the water when placed in it, hence, we have:

Q(water) = -Q(copper)

The final temperature of the water is equally to the final temperature of the copper= 22.87°C.

Hence, mcΔT (water) = (-) mcΔT (copper)

Note that, specific heat (C) of water and copper are 4.184 J/g°C and 0.385 J/g°C respectively.

Therefore;

= (m) (4.184) (22.87-21.65) = - {(35.41) (0.385) (22.87-97)}

= m × 4.184 × 1.22 = - {35.41 × 0.385 × -74.13)}

5.10448m = - {-1010.6031}

5.10448m = 1010.6031

m = 1010.6031 ÷ 5.10448

m = 197.98

Therefore, the mass of water copper was added to is 197.98g

Answer: symbiotic relationship

Explanation:

: PM2.5 is defined as the mass concentration of particles in the air less than or equal to 2.5 micrometers in diameter.Question 15: False, carbon dioxide (CO2) is not considered a criteria air pollutant.

Question 16: The closest answer is 50%, but the exact percentage is not provided in the question.Question 17: The term "photochemical smog" is most synonymous with ozone (O3), which is a criteria air pollutant.Question 18: True, attainment of ambient air quality standards requires that measured concentrations at all monitoring stations within an air district are below ambient air standards.

Question 14 asks about the definition of PM2.5. PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 micrometers. It represents the mass concentration of particles suspended in the air, which are small enough to be inhaled into the respiratory system and can have adverse health effects.

Question 15 states whether carbon dioxide (CO2) is a criteria air pollutant. Criteria air pollutants are a set of pollutants regulated by environmental agencies due to their detrimental impact on air quality and human health. However, carbon dioxide is not considered a criteria air pollutant because it does not directly cause harm to human health or the environment in the same way as pollutants like ozone or particulate matter.

Question 16 asks about the percentage of carbon monoxide (CO) emissions from mobile sources in Santa Clara County. While the exact percentage is not provided in the question, the closest answer option is 50%. However, it is important to note that the precise percentage may vary depending on specific local conditions and emissions sources.

Question 17 inquires about the criteria air pollutant most synonymous with the term "photochemical smog." Photochemical smog is primarily associated with high levels of ground-level ozone (O3). Ozone is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight, creating a hazy and polluted atmospheric condition.

Question 18 addresses the concept of "attainment" of ambient air quality standards. To achieve attainment, measured concentrations of pollutants at all monitoring stations within an air district must be below the established ambient air quality standards. This ensures that the air quality in the given area meets the required standards for protecting human health and the environment.

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The nervous system in the human body uses a similar process to carry messages from the sensory organs to the brain. This process involves specialized cells called neurons, which transmit signals in the form of electrical impulses.

In the nervous system, sensory organs such as the eyes, ears, and skin detect various stimuli from the external environment. These sensory signals are converted into electrical impulses by sensory neurons. These impulses are then transmitted along the length of the neuron, which is composed of a cell body, dendrites, and an axon. The electrical impulse travels down the axon and reaches the synapse, which is a small gap between the neuron and the next neuron or target cell.

At the synapse, the electrical signal is converted into a chemical signal. Neurotransmitter molecules are released from the first neuron and travel across the synapse to bind with specific receptors on the receiving neuron or target cell. This binding process generates a new electrical signal in the receiving neuron, allowing the message to be transmitted further. This sequence of electrical and chemical signaling repeats until the message reaches its destination, such as the brain.

This process of electrical impulses converted into chemical signals and transmitted across synapses allows for the rapid and precise communication within the nervous system. It enables the transmission of sensory information, motor commands, and coordination of various bodily functions.

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Explanation:

1.ca

2.H

3.O

.................

Answer:

Amount of NH3 in g = 0.0867 g

Explanation:

Molecular mass of

0.0051 mol has same no. of molecules in both NH3 and SF6.

Amount of NH3 in g = Mole × Molar mass

Molar mass of NH3 = 17.00 g/mol

Amount of NH3 in g = 0.0051 × 17.00

                                 = 0.0867 g

Answer:

Magnesium Oxide (MgO) has a higher melting point than Sodium Chloride (NaCl) which is around 2,800 degrees Celcius. This is because its Mg2+ and O2- ions have a greater number of charges, and so form stronger ionic bonds, than the Na+ and Cl– ions in Sodium Chloride.

Answer:

The molar mass of one molecule of ammonium sulfate (NH4)2 SO4 132.14 grams per mole

Answer: 132.15 g

Explanation:

If this question is from a mastery test on Edmentum, I just took it and this was the correct answer

Answer:

Since the ions cannot move, ionic solids are non-conductors of electricity. When the solid is melted to a liquid, however, the ions are free to migrate. Therefore, ionic liquids are good conductors of electric current. A conductor is a substance capable of transmitting electricity and/or heat.

Explanation:

:)

No, \(PCI_3\)  is not a good conductor.

Phosphorus trichloride is an inorganic compound with the chemical formula PCl3. A colourless liquid when pure, is an important industrial chemical, being used for the manufacture of phosphates and other organophosphorus compounds.

The liquid does not conduct electricity because of the lack of ions or mobile electrons.

Hence, no, \(PCI_3\) is not a good conductor.

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Answer:

B) The molecules were closer together when the juice pop was frozen.

(a)The pH of the fruit juice solution is approximately 3.5. (b) The hydrogen ion concentration of the tomato solution is 0.001 mol/L.

(b)The hydrogen ion concentration of the tomato solution is 0.001 mol/L.

(a). The hydrogen ion concentration of the fruit juice is 0.0003 mol/L. We can determine the pH of the solution using the formula pH = -log[H⁺].

pH = -log(0.0003)

pH ≈ -log(3 × 10⁻⁴)

Using a calculator, we can calculate the logarithm:

pH ≈ -(-3.5229) (rounded to the nearest tenth)

pH ≈ 3.5

Therefore, the pH of the fruit juice solution is approximately 3.5.

(b). A tomato has a pH of 3.0. We can determine the hydrogen ion concentration of this solution by rearranging the formula pH = -log[H⁺] to solve for [H⁺].

[H⁺] = 10(-pH)

[H⁺] = 10⁻³

[H⁺] = 0.001 mol/L

Therefore, the hydrogen ion concentration of the tomato solution is 0.001 mol/L.

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Answer:

The answer is Diffusion.

Explanation:

Diffusion is a movement of molecules(substances) from a region of high concentration to a region of low concentration down a concentration gradient.

Answer:

Active

Explanation:

During active transport, substances move against the concentration gradient, from an area of low concentration to an area of high concentration. This process is “active” because it requires the use of energy.

Answer:

B

Explanation:

trust me im 100% correct

Moderates weather so that highs and lows are less extreme because of sea breeze motion.

Sea breeze are that as the warm air from the land is rising and the cooler air from the ocean is flowing over land and will replace the warmer air that is rising. in simple words , land gets warmer during the day than the water and the hot air rising up and cooler air move towards the land  called as sea breeze. moderate weather is refers to that weather which is neither very cold nor very hot.

Thus, Moderate weather so that highs and lows are less extreme because of sea breeze motion.

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