1. Determine the final volume of a 1.5 M HCl solution prepared from 20.0 mL
of a 6.0 M HCl solution.

Answer: 4m/s2 (B)

Explanation:

Force = mass × acceleration

Force given is 8N

Mass=2kg

Acceleration =?

Substitute into the formula

F=ma

8=2a

A=8/2

A=4m/s2

Acceleration used is 4m/s2 (B)

Answer:

b

Explanation:

A glucose molecule breaks down into ethanol during the process of alcoholic fermentation, which is an anaerobic pathway alternative to aerobic respiration.

During the process of alcoholic fermentation, a glucose molecule is broken down into ethanol. This anaerobic process follows the initial step of glycolysis, where one glucose molecule is converted into two pyruvate molecules. This is followed by the conversion of pyruvate into acetaldehyde and carbon dioxide, after which the acetaldehyde is further reduced into ethanol.

This reduction step regenerates NAD⁺ from NADH, which is essential for glycolysis to continue and for the overall fermentation to proceed.

Fermentation processes like alcoholic fermentation and lactic acid fermentation are alternative pathways to aerobic respiration, differing by their end products--ethanol and carbon dioxide in the former, and lactic acid in the latter. Whereas aerobic respiration is a different process entirely in which glucose breaks down into carbon dioxide and water using oxygen, yielding a much higher amount of ATP compared to fermentation.

The correct answer to the student's question is, therefore, alcoholic fermentation, where glucose is broken down into ethanol in the absence of oxygen.

Answer:

Bromothymol blue (BMB) is an indicator dye that turns yellow in the presence of acid. When carbon dioxide is added to the solution, it creates carbonic acid, lowering the pH of the solution. BMB is blue when the pH is greater than 7.6, green when the pH is between 6-7.6, and yellow when the pH is less than 6.

bread, rice, pasta, potatoes, vegetables, fruit, sugar, yogurt, milk, fish, meat, cheese, peanut butter, butter, salad dressing, avocado, and olive oil.

Answer:

Protein, fat, vitamins and oil.

Explanation:

Hope this helps :)

Answer :

(a) The mass of [tex]Al_2O_3[/tex] produced is, 15.2 grams.

(b) The percent yield of the reaction is, 72.5 %

Explanation :

Part (a) :

Given,

Mass of [tex]Al[/tex] = 85.1 g

Molar mass of [tex]Al[/tex] = 27 g/mol

First we have to calculate the moles of [tex]Al[/tex]

[tex]\text{Moles of }Al=\frac{\text{Given mass }Al}{\text{Molar mass }Al}=\frac{85.1g}{27g/mol}=3.15mol[/tex]

Now we have to calculate the moles of [tex]Al_2O_3[/tex]

The balanced chemical equation is:

[tex]4Al+3O_2\rightarrow 2Al_2O_3[/tex]

From the reaction, we conclude that

As, 4 moles of [tex]Al[/tex] react to give 2 moles of [tex]Al_2O_3[/tex]

So, 3.15 moles of [tex]Al[/tex] react to give [tex]\frac{2}{4}\times 3.15=1.58[/tex] mole of [tex]Al_2O_3[/tex]

Now we have to calculate the mass of [tex]Al_2O_3[/tex]

[tex]\text{ Mass of }Al_2O_3=\text{ Moles of }Al_2O_3\times \text{ Molar mass of }Al_2O_3[/tex]

Molar mass of [tex]Al_2O_3[/tex] = 102 g/mole

[tex]\text{ Mass of }Al_2O_3=(1.58moles)\times (102g/mole)=161.2g[/tex]

Therefore, the mass of [tex]Al_2O_3[/tex] produced is, 161.2 grams.

Part (b) :

Now we have to calculate the percent yield of the reaction.

[tex]\text{Percent yield}=\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100[/tex]

Experimental yield = 116.9 g

Theoretical yield = 161.2 g

Now put all the given values in this formula, we get:

[tex]\text{Percent yield}=\frac{116.9g}{161.2g}\times 100=72.5\%[/tex]

Therefore, the percent yield of the reaction is, 72.5 %

Answer:

Im not completely sure about the answer, but A and C are Wrong

Explanation:

This is because the snail growing its shell is a physical change. For the shell of a snail to grow, the snail must consume Calcium to grow its shell. And would grow it just like how we grow our fingernails!

Rust forming on a bicycle frame is an example of a chemical change. This is caused by metal being exposed to oxygen. Just like when you leave your bike outside in the rain, it'll get rusty!

Both snails growing shells and rust forming on a bicycle frame are chemical changes. The former involves the secretion of calcium carbonate, while the latter is the formation of iron oxide due to the reaction of iron with oxygen.

The two changes, snails growing shells and rust forming on a bicycle frame, have a common feature - they are both chemical changes.

Snails growing shells is a chemical change because the process of shell growth involves the secretion of calcium carbonate, a chemical process.

Similarly, when a bicycle frame rusts, it is also a chemical change. This is because rust, or iron oxide, forms when oxygen in the air reacts with the iron in the metal - this is a chemical reaction.

Hence option C is correct.

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The new volume of [tex]H_2[/tex] gas is required.

The new volume of the required gas is 1.49 L.

[tex]P_1[/tex] = Initial pressure = 1 atm

[tex]P_2[/tex] = Final pressure = 2.50 atm

[tex]T_1[/tex] = Initial temperature = 273.15 K

[tex]T_2[/tex] = Final temperature = [tex]10.00^{\circ}\text{C}=10+273.15=283.15\ \text{K}[/tex]

[tex]V_1[/tex] = Initial volume = 3.60 L

[tex]V_2[/tex] = Final volume

From the ideal gas laws we have

[tex]\dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}\\\Rightarrow V_2=\dfrac{P_1V_1T_2}{T_1P_2}\\\Rightarrow V_2=\dfrac{1\times 3.6\times 283.15}{273.15\times 2.5}\\\Rightarrow V_2=1.49\ \text{L}[/tex]

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The new volume of H₂ gas in the balloon, taken to the sea where the pressure is 2.50 atm and the temperature is 10.00°C, is approximately 3.63 liters. This calculation is based on the ideal gas law using the initial conditions at STP.

To find the new volume of H₂ gas in the balloon when taken to the sea, we can use the ideal gas law, which relates the pressure (P), volume (V), temperature (T), and the number of moles (n) of a gas. The ideal gas law is represented as:

PV = nRT

Where:

P = Pressure (in atm)

V = Volume (in liters)

n = Number of moles

R = Universal gas constant (0.0821 L·atm/mol·K)

T = Temperature (in Kelvin)

First, let's calculate the number of moles of H₂ gas in the balloon at STP (Standard Temperature and Pressure):

Pressure at STP (P₁) = 1 atm

Temperature at STP (T₁) = 273.15 K (0°C + 273.15)

Using the ideal gas law:

P₁V₁ = nRT₁

1 atm × 3.60 L = n × 0.0821 L·atm/mol·K × 273.15 K

n ≈ 0.150 moles

Now, we can use the new conditions at the sea:

Pressure at the sea (P₂) = 2.50 atm

Temperature at the sea (T₂) = 10.00°C + 273.15 = 283.15 K

We want to find the new volume (V₂) of H₂ gas

P₂V₂ = nRT₂

Substituting the values:

(2.50 atm) × V₂ = (0.150 moles) × (0.0821 L·atm/mol·K) × (283.15 K)

Now, solve for V₂:

V₂ ≈ (0.150 moles × 0.0821 L·atm/mol·K × 283.15 K) / 2.50 atm

V₂ ≈ 3.63 L

So, the new volume of H₂ gas in the balloon when taken to the sea is approximately 3.63 liters.

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Answer:

n₁ = 1.0× 10⁻⁴ mol

Explanation:

Given data:

Initial volume of balloon = 230 mL

Initial number of moles of He =?

Final number of moles of He = 3.8 × 10⁻⁴ mol

Final volume of balloon = 860 mL

Solution:

The given problem will be solve through Avogadro law,

"Number of moles of gas and volume are directly proportional to each other at constant temperature and constant pressure"

Mathematical relationship:

V₁/n₁ = V₂/n₂

No we will put the values.

230 mL  /n₁   = 860 mL/ 3.8 × 10⁻⁴ mol

n₁ = 230 mL× 3.8 × 10⁻⁴ mol/ 860 mL

n₁ = 874 × 10⁻⁴ mol. mL / 860 mL

n₁ = 1.0× 10⁻⁴ mol

Answer: the answer is n1=n2v1/v2

Explanation:

hope this helped

Answer:

601.8 mL

Explanation:

For an ideal gas kept at constant temperature and pressure, the number of moles of the gas is directly proportional to the volume of the gas:

[tex]n\propto V[/tex]

where

n is the number of moles

V is the volume of the gas

Therefore, for a gas undergoing a transformation at constant temperature and pressure, we can write:

[tex]\frac{V_1}{n_1}=\frac{V_2}{n_2}[/tex]

where here we have:

[tex]V_1=343.4 mL[/tex] is the initial volume of the gas

[tex]n_1=0.214 mol[/tex] is the initial number of moles

[tex]n_2=0.375 mol[/tex] is the final number of moles

Solving for V2, we find the final volume of the gas:

[tex]V_2=\frac{n_2 V_1}{n_1}=\frac{(0.375)(343.4)}{0.214}=601.8 mL[/tex]

The volume would 0.375 mol of argon gas occupy under the same conditions will be "601.8 mL".

According to the question,

Gas initial volume, V₁ = 343.4 mL

Initial no. of moles, n₁ = 0.214 mol

Final no. of moles, n₂ = 0.375 mol

We know that,

Moles of gas ∝ Volume of gas

or,

                   n ∝ V

and, the relation will be:

→ [tex]\frac{V_1}{n_1} = \frac{V_2}{n_2}[/tex]

then,

The final volume be:

→ V₂ = [tex]\frac{n_2 V_1}{n_1}[/tex]

By substituting the values, we get

       = [tex]\frac{0.375\times 343.4}{0.214}[/tex]

       = [tex]\frac{128.775}{0.214}[/tex]

       = 601.8 mL  

Thus the above answer is correct.

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Answer:

B

Explanation:

because every Chinese shar-pei has wrinkled skin.

Answer : The mole fraction of NaCl in a mixture is, 0.360

Explanation : Given,

Moles of [tex]NaCl[/tex] = 7.21 mole

Moles of [tex]KCl[/tex] = 9.37 mole

Moles of [tex]LiCl[/tex] = 3.42 mole

Now we have to calculate the mole fraction of [tex]NaCl[/tex].

[tex]\text{Mole fraction of }NaCl=\frac{\text{Moles of }NaCl}{\text{Moles of }NaCl+\text{Moles of }KCl+\text{Moles of }LiCl}[/tex]

Now put all the given values in this formula, we get:

[tex]\text{Mole fraction of }NaCl=\frac{7.21}{7.21+9.37+3.42}=0.360[/tex]

Therefore, the mole fraction of NaCl in a mixture is, 0.360

Answer:

.36

Explanation:

Answer: 0.5 moles

Explanation:

Nitric acid has a chemical formula of HNO3.

Given that:

Amount of moles of HNO3 = Z (let unknown value be Z)

Volume of HNO3 solution = 2L

Molarity of HCl solution = 1M

Recall that molarity of a solution is obtained by dividing the amount of moles by volume in liters

i.e Molarity = Amount in moles/volume

1M = Z x 2L

Z = (1M / 2L)

Z = 0.5 moles

Thus, 0.5 moles of nitric acid are needed to make 2 liters of its solution.

Answer:

The current model of the atom and the characteristics of each of the 3 subatomic particles are the electron cloud which contains 1 subatomic particle the electron which has negative charge and weights 1/2000 AMU the electron cloud surrounds the nucleus, the nucleus contains two subatomic particles the proton which has positive charge and weights one AMU and the neutron which has neutral/no charge and weights one AMU.

1. 2Pb(NO₃)₂ → 2PbO + 4NO₂ + O₂

2. CH₄ + 2O₂ → CO₂ + 2H₂O

3. Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag

4. MnO₂ + 4HCl → MnCl₂ + 2H₂O + Cl₂

5. Pb(NO₃)₂ + 2NaCl → PbCl₂ + 2NaNO₃

1)

[tex]NaCl+AgNO_3=>NaNO_3+AgC\downarrow[/tex]

2)

CuSO_4+Cu_2Cl_2\neq>

[tex]CuSO_4+Cu_2l_2\neq[/tex]

Answer: I'm sure it's possible but we too lazy

Explanation:

Answer:

Elements.

Explanation:

Modern Chemistry says these are elements.

Answer:

elements

Explanation:

Answer:

Fault-block mountain

In geography, fault-block mountains arise when the Earth's crust pulls apart and divides. Some parts of the Earth are pushed upwards whereas the other moves downward forming a divergent boundary. In geological studies, a divergent boundary can be described as a linear feature which arises due to plate tectonics which are being pulled apart from each other. Hence, fault-block mountains are most likely to be seen in a divergent boundary.

Most active divergent plate boundaries occur between oceanic plates and exist as mid-oceanic ridges. Divergent boundaries also form volcanic islands, which occur when the plates move apart to produce gaps that molten lava rises to fill.

Fault-block mountain

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The earth doesn't receive the same energy equally because of its shape. The earth is a sphere, the energy in the equatorial regions are more than the polar regions.

Answer:

Explanation:

True

Answer:

c.

Explanation:

it moves in slow convection currents, hope this helps!

The mantle moves in very slow currents, behaving like a non-Newtonian fluid, allowing the solid, yet plastically flowing rock to drive the motion of tectonic plates within the Earth's lithosphere.

The mantle of the Earth is characterized by its ability to move in very slow currents. This is due to the mantle behaving like a non-Newtonian fluid, similar to the material Silly Putty, which can deform under a slow, continuous stress. The mantle, although predominantly solid rock, flows plastically rather like a very viscous liquid, such as honey or corn syrup. The lithosphere, which includes the crust and the rigid uppermost part of the mantle, moves with the tectonic plates atop the slowly flowing asthenosphere. This process is integral to plate tectonics and influences the movement of the Earth's crust.

Among the choices provided, option C - It moves in very slow currents is the correct description regarding the mantle.

Answer:

The correct answer is 0.17 M

Explanation:

We have the following data:

V= 820 ml x 1 L/1000 ml = 0.82 L

m = 7.4 g

Ammonium chloride has the chemical formulae NH₄Cl. So, we calculate the molecular weight (MM) of NH₄Cl from the molar mass of N, H and Cl as follows:

MM NH₄Cl = 14 g/mol + (4 x 1 g/mol ) + 35.4 g/mol = 53.4 g/mol

Now we have to calculate the number of moles of NH₄Cl we have in the solution. For this, we divide the mass (m) into the molecular weight of NH₄Cl (MM):

moles NH₄Cl = m/MM = 7.4 g/53.4 g/mol = 0.138 moles

The molarity of the solution is the number of moles of NH₄Cl in 1 liter of solution. So, we have to divide the number of moles of NH₄Cl into the volume in liters as follows:

M = number of moles NH₄Cl/V = 0.138 moles/0.82 L = 0.169 mol/L ≅ 0.17 M

Answer:

Molarity= 0.169M

Explanation:

Applying n= CV

V=820ml= 0.82dm3

n= m/M = 7.4/53.5 = 0.138mol

0.138= C× 0.82

C= 0.169M

Answer:

The mechanical energy of the wind is converted into electrical energy by a wind turbine. The kinetic energy of a flowing fluid, in this example air, is converted into a rotating motion by a turbine. Wind moves or rotates the blades of a wind turbine as it passes through them.

Explanation:

Wind turbines work on a simple principle: rather than using electricity to create wind (like a fan does), they utilize wind to create electricity. The propeller-like blades of a turbine are turned by the wind around a rotor, which spins a generator, which generates power.

Wind is a type of solar energy that is produced by a series of three events: The sun heats the atmosphere unevenly, irregularities on the surface of the world, or the earth's axis of rotation.

Wind patterns and speeds range dramatically across the United States, and are influenced by bodies of water, vegetation, and topography changes. Sailing, flying a kite, and even generating electricity are all examples of how humans employ wind flow, or motion energy.

Both "wind energy" and "wind power" refer to the process of using the wind to generate mechanical or electrical power. This mechanical energy can be employed for specialized purposes (such as grinding grain or pumping water), or it can be converted to electricity using a generator.

The aerodynamic force of the rotor blades, which act similarly to an airplane wing or helicopter rotor blade, converts wind energy into electricity in a wind turbine. The air pressure on one side of the blade lowers when the wind blows across it. Lift and drag are created by the difference in air pressure across the two sides of the blade. The lift force is greater than the drag force, causing the rotor to spin. The rotor is connected to the generator either directly (if it's a direct drive turbine) or through a shaft and a series of gears (a gearbox), which speeds up the rotation and allows the generator to be physically smaller. This conversion of aerodynamic force to generator rotation to create electricity.

Answer:

A

Explanation:because since not all of them hove the sa

me program the pro duction is  slow

Answer:

Based on their acid-base characteristics oxides are classified as acidic, basic, amphoteric or neutral: An oxide that combines with water to give an acid is termed as an acidic oxide. The oxide that gives a base in water is known as a basic oxide.

Explanation:

Answer:

your answer

Explanation:

The oxide that gives a base in water is known as a basic oxide. An amphoteric solution is a substance that can chemically react as either acid or base. However, it is also possible for an oxide to be neither acidic nor basic, but is a neutral oxide.

Answer:

These pumps allow the energy to be saved for later use, whenever the load increases.

Explanation:

These hydroelectric pumps are a vast connection of ancillary grid services. These act as storage plants. These enable an electric provider to balance energy and provide stability. This network not only has reservoirs but also controls the frequency of the energy produced.  

Due to this, within a few seconds, large amounts of electricity can be produced.

Hydroelectric Pump is a set of two water reserves which pump water through turbines to generate energy at various required elevations. The produced energy is stored by various electric power systems.

The boiling point decreases as the volume decreases.

Explanation:

The Temperature - Volume law otherwise called as Charles law is applied, which says that the volume of the given gas at constant pressure is directly proportional to the temperature measured in Kelvin. As the volume increases, the temperature also increases, if the volume decreases, then the temperature also decreases.

[tex]$\frac{V}{T} = constant[/tex]

As per the Charles law, here the volume is decreased from 50 ml to 25 ml so the boiling point also decreases.

The rate of a chemical reaction increases as the number of effective collisions between reacting particles increases.

The rate of a chemical reaction increases as the number of effective collisions between reacting particles increases. This is because an increase in the number of collisions leads to a greater chance of particles colliding with enough energy and the right orientation to react. As a result, the rate of the reaction increases.

Answer:

Has very few trees, has cold and rainy winters, and has dense shrubs and grasses.

A chemical formula is made up of chemical symbols of the elements involved, subscripts representing the number of those atoms in the compound, and the simplest whole number ratio of these atoms. Isomeric forms of compounds have the same molecular formula but different structures and properties.

A chemical formula represents the composition of a compound made up of two or more elements chemically combined. Three main components make up a chemical formula:

Some molecules may also exist in isomeric forms, which are compounds with the same molecular formula but different arrangements of atoms, which results in different chemical properties. For example, ethanol (C2H6O) and dimethyl ether (C2H6O) have the same molecular formula but their structures and properties are different because of different bonding arrangements.

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Answer:B

Explanation: The blades spin making the insides create friction making electricity I think