What would be a correct unit of measurement for velocity?
Group of answer choices

Meters/second North

Meters/second

Answer:

Most plastic is chemically inert and will not react chemically with other substances -- you can store alcohol, soap, water, acid or gasoline in a plastic container without dissolving the container itself.

Explanation:

Answer:

Most plastic is chemically inert and will not react chemically with other substances -- you can store alcohol, soap, water, acid or gasoline in a plastic container without dissolving the container itself.

Explanation:

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Answer:

option b is the correct answer

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There is said to be a short circuit when one part of a parallel circuit has a very low resistance and almost all the current will flow through this part and very little current will flow through the other part.

Short circuit means when a normal wire comes in direct contact with another wire, then the resisitance value turns zero and flow of current is ebruptly increases.

So, if in any wire very little or no resistance is present and high amount of current will flow from that wire then in this case short circuit occur. It generally occurs in the parallel circuit because in the closed circuit that much of current flow is not present that cause short circuit.

Hence option (B) is correct.

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Answer:

(simple differences)Biodegradable substances are those that degrades or break down naturally...

Non-biodegradable substances are those that do not degrades easily...

Answer:

Biodegradable substances are those that degrades or break down naturally

Non-biodegradable substances are those that do not degrades easily

Answer:

dont get it wet or it wont work at all

Answer:

Stars generate energy through nuclear fusion. Here's an easy explanation about how the process works. ... Stars spend most of their lives repetitively compressing two hydrogen atoms into a single helium atom – plus a lot of energy, which is released as light and heat.

Explanation:

I think Low melting point

because NaCl (salt has mp 801 degC)

Water has mp 0 degC

The number of moles of NaOH contained in 700ml of 3.00 M concentration of NaOH are 2.1 moles.

To calculate the number of moles of NaOH in a 700 mL of 3.00 M NaOH solution, we can use the following formula:

moles = concentration (M) x volume (L)

First, we need to convert the volume from milliliters (mL) to liters (L):

700 mL = 0.7 L

Now we can plug in the values we know:

moles = 3.00 M x 0.7 L

moles = 2.1 moles

Therefore, there are 2.1 moles of NaOH in 700 mL of 3.00 M NaOH solution.

According to Avogadro's number, one mole (abbreviated as mol) equals 6.022 x 10²³ molecular entities. Each element has a unique molar mass based on the weight of 6.022 x 10²³ of its atoms.

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Elements in the same group of the periodic table tend to have similar chemical properties

For Al;

a. Period: Period 3

b. Group: Group 13

c. Proton Number (Atomic Number): 13

d. Number of Electrons: 13

e. Electronic Configuration: 1s² 2s² 2p⁶ 3s² 3p¹

f. Number of Outer-Shell Electrons: 3

g. Similar Properties: Boron (B)

For Boron (B):

a. Period: Period 2

b. Group: Group 13

c. Proton Number (Atomic Number): 5

d. Number of Electrons: 5

e. Electronic Configuration: 1s² 2s² 2p¹

f. Number of Outer-Shell Electrons: 3

g. Similar Properties: Aluminium (Al)

For Nitrogen (N):

a. Period: Period 2

b. Group: Group 15

c. Proton Number (Atomic Number): 7

d. Number of Electrons: 7

e. Electronic Configuration: 1s² 2s² 2p³

f. Number of Outer-Shell Electrons: 5

g. Similar Properties: Phosphorus (P)

For Oxygen (O):

a. Period: Period 2

b. Group: Group 16

c. Proton Number (Atomic Number): 8

d. Number of Electrons: 8

e. Electronic Configuration: 1s² 2s² 2p⁴

f. Number of Outer-Shell Electrons: 6

g. Similar Properties: Sulfur (S)

For Phosphorus (P):

a. Period: Period 3

b. Group: Group 15

c. Proton Number (Atomic Number): 15

d. Number of Electrons: 15

e. Electronic Configuration: 1s² 2s² 2p⁶ 3s² 3p³

f. Number of Outer-Shell Electrons: 5

g. Similar Properties: Nitrogen (N)

For Sulfur (S):

a. Period: Period 3

b. Group: Group 16

c. Proton Number (Atomic Number): 16

d. Number of Electrons: 16

e. Electronic Configuration: 1s² 2s² 2p⁶ 3s² 3p⁴

f. Number of Outer-Shell Electrons: 6

g. Similar Properties: Oxygen (O)

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Answer = 4g/cm³

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The volume of the cube is 4g/cm^3. So the correct option is C.

The mass of a solid substance per unit volume is called density. Density is defined as d = M/V, where M stands for mass and V for volume. The unit of density that is most frequently used is grammes per cubic centimetre. For instance, the density of Earth is 5.51 grammes per cubic centimetre, while the density of water is 1 gramme per cubic centimetre.

Another way to state density is in kilogrammes per cubic metre (in metre-kilogram-second or SI units). Air, for instance, has a density of 1.2 kilogrammes per cubic metre. Books and manuals list the densities of typical solids, liquids, and gases.

The mass of a body may be calculated from its volume using density, and vice versa. The mass is equal to the volume multiplied by the density (M = Vd), whereas the volume is equal to the mass divided by the density (V = M/d). One may calculate a body's weight by multiplying its mass by the acceleration of gravity, which is typical of more practical significance than its mass.

Therefore the correct option is C.

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The complete reaction can be written as -

3CoCl₂ + 2K₃PO₄ = 6KCl + Co₃(PO₄)₂

This is a precipitation reaction and the type of bonding involved in each of these compounds is ionic bonding.

A precipitation reaction is a chemical reaction occurring in an aqueous solution where two ionic bonds combine, resulting in the formation of an insoluble salt.

Precipitation reactions also play a central role in many chemical analysis techniques, including spot tests used to identify metal ions and gravimetric methods for determining the composition of matter.

The compounds involve ionic bonding that occurs through transfer of electrons.

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a) Melting: An example of melting that occurs in our everyday life is when we heat butter on a stovetop.

b) Freezing: Freezing is the process in which a liquid transforms into a solid upon cooling.

c) Condensation: One example of condensation that we encounter regularly is when water droplets form on the surface of a cold drink on a hot day.

d) Evaporation: Evaporation is the process by which a liquid transforms into a gas or vapor.

e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state.

a) Melting:  Butter is a solid at room temperature, but when heat is applied, it melts into a liquid. This change is a result of the increase in temperature, which provides enough energy to overcome the intermolecular forces holding the butter molecules together.

b) Freezing:Eventually, the temperature reaches the freezing point of water (0°C or 32°F), at which the water molecules slow down and arrange themselves into a regular, crystalline structure. This transformation from a liquid to a solid state is accompanied by the release of heat energy.

c) Condensation: As the temperature decreases, the air's capacity to hold moisture decreases, causing the water vapor in the air to condense into liquid water droplets. This process occurs due to the transfer of heat energy from the warm air to the cold surface, leading to the saturation of the air and the conversion of water vapor into liquid form.

d) Evaporation:  As the sun's heat energy is absorbed by the water molecules on the clothes' surface, their kinetic energy increases, causing them to break free from the liquid phase and escape into the surrounding air as water vapor. This process occurs because the molecules at the liquid surface with sufficient energy can overcome the attractive forces within the liquid and enter the gas phase.

e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state. An example of sublimation is the process of dry ice (solid carbon dioxide) converting into carbon dioxide gas.

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The time of flight of the 86Q+ ion 1.227 x 10⁻⁵ s.

Using the principle of conservation of energy to relate the kinetic energy of the ions to their mass and velocity. Since all of the Q+ ions in the sample have the same kinetic energy:

m₁v₁² = m₂v₂²

where m₁  and m₂ are the masses of two different Q isotopes, and v₁ and v₂ are their corresponding velocities.

Also the formula for the time of flight (TOF) of an ion in a mass spectrometer:

t = d/v

where d is the length of the flight tube, and v is the velocity of the ion.

Combine these two equations to solve for the time of flight of the 86Q+ ion, given the time of flight of the 82Q+ ion:

m₁v₁² = m₂v₂²

v₁ = √(m₂/m₁) × v₂

t₁ = d/v₁

t₂= d/v₂ = d/(√(m₂/m₁) × v₁)

Given that t₁ = 1.243 x 10⁻⁵ s for the 82Q+ ion. Assume that the flight tube length, d, is the same for both ions.

To solve for t₂, we need to find the ratio of the masses of the two isotopes:

m₂/m₁ = 86/82 = 1.0488

Substituting this into the equation for t₂:

t₂ = d/(√(1.0488) × v₁) = (1/√(1.0488)) × t₁

t₂ = (1/√(1.0488)) × (1.243 x 10⁻⁵ s) = 1.227 x 10⁻⁵ s

Therefore, the time of flight of the 86Q+ ion is 1.227 x 10⁻⁵ s.

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Answer:

A)

Explanation:

the the amount of mass in the object

Answer:

b

Explanation:

Density is a measure of mass per volume. The average density of an object equals its total mass divided by its total volume. An object made from a comparatively dense material (such as iron) will have less volume than an object of equal mass made from some less dense substance (such as water).

The data collected is not precise.

In science, we define precision as the degree to which scientific measurements yield results having close range of values.

A precise data set has values that are very close to each other.

In this case the values; 4mi/hr, 3mi/hr, 6.9mi/hr, and 7mi/hr are not close to each other.

Therefore, the data set is not precise.

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Answer:

Average atomic mass of carbon = 12.01 amu

Explanation:

Given data:

Average atomic mass = ?

Percent abundance of C-12 = 98.93%

Percent abundance of C-13 = 1.07%

Solution:

Average atomic mass of carbon = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  / 100

Average atomic mass of carbon = (98.93×12)+(1.07×13) /100

Average atomic mass of carbon=  1187.16 + 13.91 / 100

Average atomic mass of carbon = 1201.07/ 100

Average atomic mass of carbon = 12.01 amu

Answer:

Explanation:

The pressure required can be found by using the formula for Boyle's law which is

\(P_1V_1 = P_2V_2\)

Since we are finding the required pressure

\(P_2 = \frac{P_1V_1}{V_2} \\\)

From the question we have

\(P_2 = \frac{6 \times 1200}{200} = \frac{7200}{200} = \frac{72}{2} \\ \)

We have the final answer as

Hope this helps you

Answer: thermal

Explanation: I remembered

The amount of mass within the system remained constant during the process for a closed system. A closed system refers to a system that does not exchange matter with its surroundings but allows energy transfer across its boundaries. It undergoes internal energy changes but maintains a constant mass.

A closed system, in thermodynamics, is a physical system that doesn't interact with anything outside the system's boundaries. It can only exchange energy with its environment. In a closed system, there is no exchange of matter across the system's boundaries. Because there is no external exchange, the system's mass remains constant, making it a constant mass system.

When there is no exchange of mass with the environment, the amount of mass within the system remains constant throughout the process. The mass of a closed system remains constant because, in a closed system, the total quantity of mass and energy remains constant. In conclusion, the amount of mass within the system remained constant during the process for a closed system.

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Answer:

Human activity is by far the biggest cause of habitat loss.

Humans are now responsible for causing changes in the environment that hurt animals and plant species. We take up more space on Earth for our homes and cities. We pollute habitats. ... Human activity often changes or destroys the habitats that plants and animals need to survive.

Explanation:

Human activities are the various actions for recreation, living, or necessity done by people. For instance it includes leisure, entertainment, industry, recreation, war, and exercise.

Over time, destruction of such habitats leads to reduced biodiversity, weakening the Earth's ecosystems, and ultimately posing a major threat to human life. While, significant tracts of habitat have been lost, and along with them many species of plant and animal, steps can be taken to slow and even reverse the process.

One of the most significant ways in which humans have impacted on the lives of other species is by causing climate change. Many animals, including birds and frogs, now breed much earlier in spring in Britain than they did 20 years ago. Whether or not this is having a harmful effect on them has yet to be determined.

Answer:

Enhanced gas flow through the pore or capillary to another gaseous region or vacuum.

Explanation:

Answer:

Gaseous particles tend to undergo diffusion because they have kinetic energy. ... Effusion refers to the movement of gas particles through a small hole. Graham's Law states that the effusion rate of a gas is inversely proportional to the square root of the mass of its particles.

Answer:

this is the result

Explanation:

36.0

BE=4

36.0÷4

= 9

There are approximately 1.93 × \(10^{23\) molecules of sodium carbonate in a 34.1 g sample.

The molar mass of sodium carbonate (\(Na_2CO_3\)) is 105.99 g/mol.

To calculate the number of molecules present in a 34.1 g sample, we can use the following formula:

Number of moles of the compound (n) = Mass of the compound (m) / Molar mass of the compound (M)

We can use this formula to calculate the number of moles of sodium carbonate in the given sample:

n = m / M = 34.1 g / 105.99 g/mol = 0.321 moles

Now, we need to calculate the number of molecules of sodium carbonate that are present in this sample.

We can use Avogadro's number (6.022 × \(10^{23\)) to convert from moles to molecules:

Number of molecules = Number of moles × Avogadro's number

= 0.321 moles × 6.022 × \(10^{23\) molecules/mol

= 1.93 × \(10^{23\) molecules

Therefore, there are approximately 1.93 × \(10^{23\) molecules of sodium carbonate in a 34.1 g sample.

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Answer:

Na 1s2 2s2 2p6 3s1

Ar 1s2 2s2 2p6 3s2 3p6

Explanation:

Answer:

D

Explanation:

Because they are very different

The condensed formula of the expected main organic product from the reaction between methanol and tosyl chloride, followed by a nucleophile, is CH₃OCH₃.

In the given reaction, the alcohol (CH₃OH) reacts with tosyl chloride (TsCl) in the presence of a base (pyridine) to form an intermediate product, which then reacts with a nucleophile to form the final product.

The first step of the reaction involves the substitution of the -OH group of the alcohol with a tosyl group (-OTs) in the presence of pyridine. This forms a tosylate ester intermediate. The tosyl group is a good leaving group and can be easily replaced by a nucleophile.

In the second step, a nucleophile attacks the intermediate to displace the tosyl group and form the final product. In this case, the methoxide ion (CH₃O⁻) acts as a nucleophile and attacks the tosylate ester to form the main organic product, which is dimethyl ether (CH₃OCH₃).

Therefore, the expected main organic product of the given reaction is CH₃OCH₃, which is the condensed formula of dimethyl ether.

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0.173 liters of respired air can react with 88.6 g of Na₂O₂ if each liter of respired air contains 0.0769 g of CO₂.

The following diagram illustrates how carbon dioxide CO₂ and sodium peroxide (Na₂O₂) react:

CO₂ + Na₂O₂ = CO₂ + 2Na₂CO₃ + O₂.

We can see from the balanced chemical equation that one mole of Na₂O₂ reacts with two moles of carbon dioxide. Na₂O₂ has a molar mass of 77.98 g/mol, making 88.6 g of the compound equal to 1.13 moles. As a result, 1.13 moles of Na₂O₂ and 2.26 moles of CO₂will react.

Air that has been breathed has 0.0769 g of CO₂ per liter. Thus, 1.13 moles of Na₂O₂can react with liters of respired air in the following way:

(0.0769 g CO₂ / 1 L air) x (0.13 mol Na₂O₂) x (2 mol CO₂ / 1 mol Na₂O₂) x (0.13 mol Na₂O₂) = 0.173 L air

As a result, 0.173 L of respired air can react with 88.6 g of Na₂O₂. The self-contained breathing apparatus user can then breathe by using the oxygen and sodium carbonate produced by this process.

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Half life, as stated, is a measurement of the rate at which radioactive material decays.

This process can be artificially produced by people, such as within a nuclear reactor, but can also occur spontaneously in nature. Depending on the particles or energy generated during the reaction, there are many kinds of radioactivity. Alpha particles, beta particles, and gamma rays are the three categories.

Average and half-life are two characteristics that may be used to describe the decay constant. Moments are used as the measuring unit in both scenarios. The average lifespan of such an element, as indicated by its name, may be expressed in the form of the following affirmation:

Nt=N₀ * e^(−λt).

The duration of time that is defined by how long it takes for half of a material to degrade is known as its half-life (both radioactive and non-radioactive elements). All through process of decay, its rate of decay is constant. It may be seen by:

Nt=N₀* (1/2)^(t/t₁₂).

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Answer:

Magnesium would be the metal

Explanation:

The heat involved in a physicochemical process follows the formula:

Q = m×C×ΔT

Where Q is heat involved,

m is mass of substance,

C is specific heat of the susbtance

And ΔT change in temperature

We can solve por specific heat of the solution:

C = Q / m*ΔT

Replacing the values of the problem:

C = 2090J / 40g*(81.7°C-30°C)

C = 1.01J/g°C

This specific heat is the specific heat of Magnesium. Thus:

X-rays have the most energy, ultraviolet light has the shortest wavelength, and gamma rays have the highest frequency.

What is ultraviolet?
The wavelength of ultraviolet (UV) radiation ranges from 10 nanometers (nm; corresponding frequency: 30 PHz) to 400 nanometers (nm; corresponding frequency: 750 THz), which is shorter than the wavelength of visible light but longer than the wavelength of X-rays. Sunlight contains UV radiation, which makes up around 10% of the Sun's overall electromagnetic radiation output. Electric arcs and specialty lighting, such mercury-vapor lamps, tanning lamps, and black lights, can also produce it. Long-wavelength UV can trigger chemical reactions and make many things light or fluoresce even though it is not thought of as an ionising radiation since its photons lack the energy to ionise atoms.

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