Answer this please need help right now

Objects
1. Plastic Bottle
2. Plastic Bottle​

Answer:

3 elements

Explanation:

Answer:

3 elements

Explanation:

\(4CO_2+6H_2O\)

the elements that we see are

Carbon (C)

Oxygen (O)

Hidrogen (H)

Oxygen (O)

but it says DIFFERENT so we are counting two oxygens that are the same

so we only have

Carbo (C)

Oxygen (O)

Hidrogen (H)

hence there are only three different elements

Answer:

Below!

Explanation:

To calculate the average acceleration you can use this formula....

     acceleration = finalvelocity - initial velocity / time

Because the object begins at rest we know that our initial velocity is 0 m/s

Our final velocity is 7 m/s, and our time is 0.1 seconds....

Plugging in our values :

     acceleration = 7m/s - 0.1 m/s / 0.1 s

                           = 7 m/s / 0.1s

                           = 70 m/s^2

This is already at the proper amount of sig figs so we're good to go!

Therefore the average acceleration of this object is 70 m/s^2

Hope this helps! Best of luck <3

\(\\ \sf\longmapsto Acceleration=\dfrac{v-u}{t}\)

\(\\ \sf\longmapsto Acceleration=\dfrac{7-0}{0.1}\)

\(\\ \sf\longmapsto Acceleration=\dfrac{7}{0.1}\)

\(\\ \sf\longmapsto Acceleration=70m/s^2\)

Dipole moment is present between atoms that have differences in their electronegativity. These atoms have unequal distribution of positive and negative charges.  

CO₂, BF₃, CCl₄, and BeF₂ have zero dipole moments because the atoms present in these molecules cancel each other's dipole moments and have overall net zero dipole moments.  

CO₂ is a linear and symmetrical molecule. The molecule has two C=O bonds, which are present in opposite directions. The dipole moment of one C=O bond cancels the dipole moment of the other.  

In BF₃, all three B-F bonds have slightly negative charges on fluorine atoms. The charges are balanced in the symmetrical triangular shape of the molecule. Therefore, the dipole moments of the three bonds cancel each other.  

Similarly, CCl₄ and BeF₂ have overall zero dipole moments because these have regular symmetrical structures.

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The rate law is written as;

Rate = [Cl]^0  [NO] ^2

We know that the rate law does determine the way that the reaction goes. In effect we know that the rate law is written based on the concentration of the reactants.

The rate law of the reaction must be empirical. We can't know that rate law unless we do  vary the concentrations of the reactants in the system and make the necessary adjustment to see the observed rate law.

We are told that [Cl2] is constant while [NO] doubles so we write;

Rate = [Cl]^0  [NO] ^2

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The new pressure is 0.0618 atm.

To solve this problem, we can use the ideal gas law, which relates the pressure (P), volume (V), number of moles (n), and temperature (T) of a gas:

PV = nRT

where R is the ideal gas constant. If we assume that the temperature is constant, we can write:

P₁V₁= P₂V₂

where P1, V1, and P2, V2 are the initial and final pressure and volume, respectively.

We are given that the initial pressure is P₁= 1.50 atm, the initial volume is V₁ = 350 mL, and the final volume is V₂ = 8.50 L. We need to find the final pressure, P₂.

First, we need to convert the initial volume from milliliters to liters:

V₁ = 350 mL = 0.350 L

Next, we need to find the number of moles of ammonia, n, that we have. To do this, we can use the molar mass of ammonia, which is 17.03 g/mol:

n = m/M = 25.0 g / 17.03 g/mol = 1.467 mol

Now we can plug in the values we have into the ideal gas law to find the initial temperature, T₁:

P₁V₁= nRT₁

T₁ = P₁V₁ / nR = (1.50 atm)(0.350 L) / (1.467 mol)(0.08206 L·atm/mol·K) = 17.1 K

(Note that we must use the ideal gas law in the correct units, which in this case are liters, moles, atmospheres, and Kelvin.)

Finally, we can use the ideal gas law again to find the final pressure, P₂:

P₂ = P₁V₁ / V₂ = (1.50 atm)(0.350 L) / 8.50 L = 0.0618 atm

Therefore, the new pressure is 0.0618 atm.

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Answer:

Avogadro's number

Explanation:

Answer:

The mole concept is a unit used in chemistry to express amounts of a substance. It is defined as the amount of a substance that contains Avogadro's number of particles. It is important in chemistry because it allows for accurate and consistent measurement of chemical reactions.

Explanation:

2.7 is the chlorine dosage for this well, expressed in parts per million.

Unlike municipal water, well water does not go through a water treatment facility. That implies that it could be contaminated with poisons like lead, coliform bacteria, volatile chemical compounds, and others. chlorination in well water is done to fulfill the role that chlorine plays in municipal sources' water disinfection processes.

It is advised to start with a chlorine concentration of 50 to 100 parts per million (ppm).

Bacterial pollutants are eliminated from well water, well casings, holding tanks, and the entire water delivery system via shock chlorination. To shock chlorinate, a well driller with a license is trained.

Algae have been linked to green water, and they may thrive in both surface water and groundwater wells even in the absence of sunshine. Algae can color the water in both the pre-and post-decomposition stages with a variety of hues, including green, brown, and reddish.

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Answer:

If you were to mix 10 grams of sugar into 200 grams of water, how much will the total mass of the solution be=

If you consider the density of water = 1 (otherwise you can’t solve the problem) you have a total mass of 30 g of which 10 g are sugar and 20 g are water. Therefore the calculation is easy:

% (w/w) of sugar = 10x100/30 = 33.33…%

% (w/w) of water = 20x100/30 = 66.66…%

Polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore the total mass of solution is 210grams.

Solubility shows the extent of solubility of a solute in solvent to make a solution. Solute is substances that is present in small amount. solvent is a substance that is present in large amount. Its SI unit is gram per litre or g/L.

Bond strength affect the solubility of a solute in solvent. weaker the bond strength is, more the solubility is. The weaker bond can be easily broken by water molecule.

mass of solution = mass of solute+ mass of solvent

mass of solute or sugar= 10 grams

mass of solvent or water=200 grams

Substituting the given values we get

mass of solution =10 grams+ 200 grams

mass of solution =210grams

Therefore the mass of solution is 210grams.

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The number that corresponds to the numbers in scientific notation is as follows:

Scientific notation is a method of writing, or of displaying real numbers as a decimal number between 1 and 10 followed by an integer power of 10.

It is an alternative format of such a decimal number immediately followed by E (exponential) and an integer. For example, the number 0.00236 can be written in scientific notation as 2.36 × 10-³ or as 2.36E-3.

In the case of the above example, 2.36 is the integer while E-03 is the exponential.

This means we can derive the number depicted by the scientific notation as given in the main answer part of this answer.

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Answer: Look at the picture below - Hope this helps <33

Explanation:

Millerite has a relatively simple structure compared to other the nickel sulfide family, making it a good example for crystal lattice drawing.

Millerite is a mineral with a hexagonal crystal structure that belongs to the nickel sulfide family. The crystal lattice structure can be drawn by following these steps:Step 1: Draw a six-sided figure to represent the hexagonal crystal structure.Step 2: Draw parallel horizontal lines inside the six-sided figure, with the distance between them equal to the c-axis spacing.Step 3: Draw vertical lines that cross the horizontal lines at a 60-degree angle, forming a hexagonal lattice.Step 4: On each horizontal line, draw circles that represent the nickel sulfide ions, with the distance between them equal to the a-axis spacing.Step 5: Draw circles on the vertical lines that represent sulfur ions, with the distance between them equal to the c-axis spacing.Step 6: Connect the circles with lines to complete the crystal lattice structure of millerite.Some additional points that could be kept in mind are- The hexagonal prism is defined by the crystal lattice constants "a" and "c," which are the distances between the nickel sulfide ions in the hexagonal lattice.- The sulfur ions fill the interstitial sites between the nickel sulfide ions in the lattice.

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Answer:

8.68 L is the new volume

Explanation:

You use Boyle's law for this.

\(P_{1}V_{1}=P_{2}V_{2}\)

\(P_{1}\) = first pressure

\(P_{2}\) = second pressure

\(V_{1}\) = first volume

\(V_{2}\) = second volume

Convert pressure from atm to mmHg (use same units):

5.97 x 760 = 4537.2 -> 4.54 x 10³

...maintain 3 significant figures in calculation, and round as needed...

(4.54 x 10³ mmHg)(2.79 L) = (1460 mmHg)(\(V_{2}\))

(4.54 x 10³ mmHg)(2.79 L) / (1460 mmHg) = \(V_{2}\) = 8.68 L

Hope this helps :)

Answer:

Q = 33105.6 J

Explanation:

Given that,

Mass of water, m = 88 grams

The temperature raised from 48°C to steam at 138°.

We need to find the energy required to raise the temperature. The formula for the energy required is given by :

\(Q=mc\Delta T\)

Where

c is specific heat of water, c = 4.18J/g °C

So,

\(Q=88\times 4.18\times (138-48)\\\\Q=33105.6\ J\)

So, the required energy is 33105.6 J.

answer on here fjchcjfjdnc.com

The coefficient of kinetic friction of a sled on a horizontal surface is 0.25. It moves at a speed of 5.0 m/s at point B and 8.0 m/s at point A. The time it takes the sled to get from point A to point B is roughly 1.22 seconds.

To determine the time it takes for the sled to travel from point A to point B, we can use the kinematic equation:

v = u + at

where:

v is the final velocity (5.0 m/s),

u is the initial velocity (8.0 m/s),

a is the acceleration, and

t is the time.

First, we need to determine the acceleration of the sled. The net force acting on the sled is the force of kinetic friction (\(f_k\)) given by:

\(f_k\) = \(\mu_k \cdot N\)

where:

\(\mu_k\) is the coefficient of kinetic friction (0.25), and

N is the normal force.

Since the sled is on a horizontal surface, the normal force is equal to the weight of the sled (mg), where m is the mass of the sled and g is the acceleration due to gravity.

The force equation becomes:

\(f_k = \mu_k \cdot m \cdot g\)

The force of kinetic friction can also be written as:

\(f_k\) = ma

Equating the two expressions for \(f_k\), we have:

ma = \(f_k\) * mg

Canceling out mass (m) from both sides, we get:

a = \(\mu_k\) * g

Substituting the given coefficient of kinetic friction (\(\mu_k\) = 0.25) and the acceleration due to gravity (g = 9.8 m/s²), we find:

a = 0.25 * 9.8 m/s²

a = 2.45 m/s²

Now, we can use the kinematic equation to find the time (t) it takes for the sled to travel from point A to point B:

v = u + at

5.0 m/s = 8.0 m/s + (2.45 m/s²) * t

Rearranging the equation to solve for t:

2.45 m/s² * t = 5.0 m/s - 8.0 m/s

2.45 m/s² * t = -3.0 m/s

Dividing both sides by 2.45 m/s²:

\(t = \frac{-3.0 \, \text{m/s}}{2.45 \, \text{m/s}^2}\)

t ≈ -1.22 s

Since time cannot be negative, we discard the negative value, resulting in:

t ≈ 1.22 s

Therefore, it takes approximately 1.22 seconds for the sled to travel from point A to point B.

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Answer:

To calculate the percent yield of n-propylbenzene and isopropylbenzene, we need to know the theoretical yield of both isomers.

The balanced equation for the reaction is:

C6H6 + CH3CH2CH2Cl → C9H12 + HCl

The molar ratio between the reactants and the products is 1:1, which means that the theoretical yield of both n-propylbenzene and isopropylbenzene is 1.2 g (the mass of the product obtained).

The percent yield of n-propylbenzene can be calculated as:

Percent yield = (actual yield / theoretical yield) x 100%

The area under the peak of n-propylbenzene is 65 mm2. We can assume that the response factor of n-propylbenzene is the same as that of isopropylbenzene. Therefore, the actual yield of n-propylbenzene can be calculated as:

Actual yield = (65 mm2 / 113 mm2) x 1.2 g = 0.689 g

Percent yield of n-propylbenzene = (0.689 g / 1.2 g) x 100% = 57.4%

Similarly, the percent yield of isopropylbenzene can be calculated as:

Actual yield = (113 mm2 / 65 mm2) x 1.2 g = 2.08 g

Percent yield of isopropylbenzene = (2.08 g / 1.2 g) x 100% = 173% (unusually high, possibly due to measurement error)

The sum of the percent yields of the two isomers is greater than 100%, which suggests that there might be some error in the analysis or calculation.

A tank of compressed CO2 has a pressure of 851 psi and a volume of 0.150 L. The pressure in atmospheres, when the final volume is 2.84 L is 44.94psi.

The term pressure is defined as the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

Gauge pressure is the pressure relative to the ambient pressure. Different units are used to express pressure.

Given:

P1 = 851

V1 = 0.150 L

P2 = ?

V2 = 2.84 L

P1V1 = P2V2

P2 = P1V1 / V2

=  851 × 0.150 / 2.84

P2 = 44.94

Thus, the pressure in atmospheres, when the final volume is 2.84 L is 44.94psi.

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Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:

The complex that will absorb a photon with the lowest energy is [Co(OH)6]3-. The correct answer is option A

Co(OH)6]3- is the complex that absorbs a photon with the lowest energy. It is because of the crystal field effect. The complex [Co(OH)6]3- has the lowest energy for the d-electrons of the cobalt ion. A photon is an elementary particle that forms a light beam. It has a small mass and no charge. A photon has wave-particle duality, which means it exhibits properties of both a wave and a particle. Photons are electromagnetic radiation particles, which means they have both electric and magnetic components.

The lowest energy is defined as the minimum energy that a system can have. It is the energy state that is energetically stable. Photons have energy, and the energy of the photon is directly proportional to its frequency. The energy of a photon can be used to determine the energy of the electron that absorbs it.

A weak field ligand environment means that there is a small energy gap between the t2g and eg orbitals. As a result, it absorbs photons with the lowest energy, according to the spectrochemical series. In comparison to the other complexes, [Co(OH)6]3- has a low-energy gap, which makes it the most stable.

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If 5/8 of a number is 80, we can start by setting up the equation:

5/8 x N = 80

where N is the number we are trying to find.

To solve for N, we can isolate it by multiplying both sides of the equation by 8/5:

N = 80 x 8/5

N = 128

Therefore, the number is 128.

To find 1/4 of the number, we can simply multiply the number by 1/4:

1/4 x 128 = 32

So, 1/4 of the number is 32.

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I. The object's temperature change.

II. The object's original volume

Thermal expansion is the process through which a solid object's volume generally tends to grow as its temperature rises.

Therefore, the factors that govern how much a solid object's volume changes include;

I. The object's temperature change.

II. The object's original volume

In the end, this suggests that when a solid item is heated, its atoms vibrate quickly around their fixed locations, increasing the volume of the thing.

In conclusion, all three (3) states of matter exhibit the scientific phenomena known as thermal expansion;

An object can heat up and its surrounds can cool down when heat is transmitted to it from its surroundings. When heat is converted to energy, it becomes part of the object's internal energy.

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Answer:

haksonnehejskznnd

Explanation:

jdudubebs sbit

The description that applies to all atoms of an element is that they share the same atomic number, meaning they have the same number of protons in their nucleus. This characteristic defines an element and distinguishes it from other elements. Although atoms of the same element may have different numbers of neutrons (isotopes), the number of protons remains consistent, giving the element its unique chemical properties.

The description that applies to all atoms of an element is that they have the same number of protons in their nucleus, also known as the atomic number. This means that all atoms of a particular element have the same chemical properties and are identified by their unique atomic number. In addition, all atoms of an element have the same number of electrons as protons in order to maintain electrical neutrality. It is important to note that while all atoms of an element have the same number of protons, they may differ in their number of neutrons, leading to different isotopes of the same element.
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Answer:

6 valence electrons

Explanation:

Answer:

all of the above

Explanation:

Answer:

All of the above

Explanation:

Prior to the montreal CFC production ban, all of these products released CFCs into the atmosphere. Some old air conditioner still release CFC so please be sure to dispose of them as CFC kills the ozone layer.

Answer: 6 mol Li

Explanation:

The first step is to balance the equation.

2Li+Cl₂⇒2LiCl

We would need our conversions to find the amount of moles of Li needed to produces 6 mol LiCl.

\(6molLiCl*\frac{2molLi}{2molLiCl} =6molLi\)

Answer:

No because it changes velocity, instead of accelerating

Explanation:

and yes, I am in K12 ツ

Answer:

no

Explanation:

it changes velocity, instead of accelerating

Volume of Li2S solution: 125 mL of 0.140 M Co(NO3)2 reacts completely with an equal volume, 125 mL, of 0.140 M Li2S solution.

The balanced equation shows a 1:1 molar ratio between Li2S and Co(NO3)2. This means that for every mole of Co(NO3)2, an equal amount of moles of Li2S is required to react.

Given that both solutions have the same concentration of 0.140 M, it indicates that for every 1 L (1000 mL) of Co(NO3)2 solution, 0.140 moles of Co(NO3)2 are present.

Since we have 125 mL of Co(NO3)2 solution, it is equivalent to (125/1000) * 0.140 moles of Co(NO3)2.

According to the stoichiometry of the balanced equation, this same amount of moles of Li2S is required to react.

Given that the concentration of Li2S solution is also 0.140 M, we can calculate the volume of Li2S solution as follows:

Volume of Li2S solution = (0.140 moles / 0.140 M) * 1000 mL = 125 mL.

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