HURRY PLEASE. Which of the following is a biotic factor in a biome? a. kinds of birds c. types of rocks b. amount of rainfall d. bodies of water

Answer:

165.385 g/mol

Answer:

1.  placing balls

2. list of materials

Explanation:

Answer:  Soundwaves travel as longitudinal or transverse waves depending on the temperature of the medium.

Explanation: i think its C

The density of the bar in kg/\(m^{3}\) is 9259.26 kg/\(m^{3}\).

Density, is the substance's mass per unit of volume.

Start with the basic density formula:

Density = mass / volume

1 m = 100 cm

1 cm = 1/100 m

To find the volume of a rectangular bar, multiply the length, width, and height:

Volume = length x width x height

Volume = 6 cm x 8 cm x 9 cm

Volume = 0.06 m x 0.08 m x 0.09 cm

Volume = 0.000432 \(m^{3}\)

Mass = 4 kg

Density = mass / (Volume)

Substitute the values:

Density = 4 kg / ( 0.000432 \(m^{3}\))

Density =  9259.26 kg/\(m^{3}\)

The density of the bar in kg/\(m^{3}\) is 9259.26.

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Answer:

H†(aq) + OH-(aq) ------> H2O(l)

Potassium Sulphate will be among the products, but since it's a solid at room temperature, it's excluded from the ionic equation

Answer:

Percent yield = 48.3%

Explanation:

The reaction is:

CCl₄  +  2HF → CF₂Cl₂ + 2HCl

1 mol of CCl₄ reacts with 2 moles of hydrofluoric acid in order to produce 1 mol of CF₂Cl₂ and 2 moles of hydrogen chloride.

HF is in excess, so the limiting reagent is the CCl₄.

We convert mass to moles:

32.9 g . 1mol / 153.8g = 0.214 moles

Ratio is 1:1. In conclussion: 0.0813 moles of CCl₄ can produce 0.0813 moles of CF₂Cl₂. We convert moles to mass, to determine the theoretical yield:

0.214 mol . 120.91g /mol = 25.8 g

Percent yield = (Yield produced /Theoretical yield) . 100

Percent yield = (12.5 g/ 25.8g) . 100 = 48.3%

The table best matches each form of energy to Jennifer's actions is A.

Energy is defined as the capacity to labor long hours or be extremely busy without becoming exhausted. Red blood cells, which carry oxygen in the blood throughout the body, are created by vitamin B12 in the body. Your body's cells use the oxygen once it gets there to produce energy.

Electrical energy, chemical energy obtained from fuels, food, and energy derived from the sun are the major types of energy used in our homes. Everyday appliances convert electrical energy into a variety of forms, including mechanical/kinetic, sound, heat, light, and other types of electromagnetic radiation.

Thus, the table best matches each form of energy to Jennifer's actions is A.

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Yes it will.

Explanation:

 At cooking temperature the concentration of ethanoic acid may be affected as the solution will boil therefore evaporating the water that will increase the concentration of acid in the solution.

A city block is 0.161km is this 16100 cm for the city block.

A kilometer and centimeter both is a unit of length equal to one thousand meters and about 0.621 miles. it is the most basic unit for measuring the distance between places or the length of roads and some objects.

To convert the kilometer to centimeter the value of the kilometer is multiplied by 1000 as 1 kilometer is equal to 1000 centimeters.

                          0.161km × 1000 = 16100 cm

Mostly used to measure the length of roads, blocks, containers, etc.

Therefore, A city block is 0.161km is this 16100 cm for the city block.

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The water cycle iss a process which helps to circulate and replenish water on earth.

Hydrology is the scientific study of water bodies , the changes that occur in them as well as the various features and behavior of water bodies such as oceans and rivers.

Water circulation created by prevailing wind systems. The Gulf Stream is an example up of the Coriolis effect.

The length of open sea over which wind can blow steadily to create waves is called fetch.

Salinity is the amount of dissolved salt in a liquid

The distance from the crest of one wave to the crest of another is called wavelength

Water circulation created by differences in density deepwater currents

Energy is what moves forward and through a wave.

The cyclical process of the changing state and movement of water around the Earth through evaporation, condensation, and precipitation is called water cycle.

As the amount of salt in water increases, the density of the water increases.

The type of energy possessed by moving water is called kinetic energy.

The rising of ocean water bringing nutrients up from the deep us called upwelling.

Therefore, the water cycle helps to circulate and replenish water on earth.

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Answer:

Ethical concerns affect scientific research by adding boundaries to what can and cant be experimented on. An example is that its socially unacceptable to experiment on humans because its considered wrong and horrific, even at the expense of learning more about human nature and/or the human body.

Answer:

To convert joules to calories, you can use the conversion factor:

1 calorie = 4.184 joules

To find out how many calories are in 4,180 joules, divide the given value by the conversion factor:

4,180 joules / 4.184 joules per calorie = 0.9 calories (approximately)

Therefore, there are approximately 0.9 calories in 4,180 joules.

Answer:

73.05g

Explanation:

1.25 mol NaCl * \(\frac{58.44g}{1 mol NaCl}\) = 73.05g

58.44g = molar mass of NaCl

Answer:

C. 4.8*10² g.

Explanation:

Answer:A = $90

B = $390

Explanation:

The aspect of the environmentally sustainable society has not been soil erosion.

An environmentally sustainable society has been the one that has been able to meet the current and future needs of the generation. The plantation of trees, reducing the greenhouse effect, and the method for the generation of a sustainable environment has been the characteristic of a sustainable society.

The soil erosion results in damage to the soil with the flow of the upper layer of soil from the water flow. The soil erosion will be resultant in damage to the environmentally sustainable society.

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The source that is unreliable is an advertisement for acne medication claims it can clear up acne in less than one week.

Citable sources are those sources that are gotten from places that are proven to be of good standards and not from mere claims such as:

Therefore, the source that is unreliable is an advertisement for acne medication claims it can clear up acne in less than one week.

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Answer:

V = 10.12 mL

Explanation:

Given that,

Density, d = 0.79 g/mL

Mass, m = 8 g

We need to find the volume of the object. Density is equal to the mass per unit volume. It can be given by :

\(d=\dfrac{m}{V}\)

Where V is the volume of the object

\(V=\dfrac{m}{d}\\\\=\dfrac{8\ g}{0.79\ g/mL}\\\\V=10.12\ mL\)

So, the volume of the object is 10.12 mL.

This technique has been used to identify the presence of gases such as oxygen, methane, and carbon dioxide in the atmospheres of exoplanets.  

i) To estimate the frequency of the violet (leftmost) emission, we can use the equation v = c/λ, where v is frequency, c is the speed of light (3.00 x 10^8 m/s), and λ is the wavelength of the emission in meters. The wavelength of the violet emission is 400 nm or 400 x 10^-9 m, so the frequency can be calculated as v = (3.00 x 10^8 m/s) / (400 x 10^-9 m) = 7.50 x 10^14 Hz.

ii) To estimate the energy of the violet emission, we can use the equation E = hv, where E is energy, h is Planck's constant (6.63 x 10^-34 Js), and v is frequency in Hz. Substituting the frequency calculated in part (i), we get E = (6.63 x 10^-34 Js) x (7.50 x 10^14 Hz) = 4.97 x 10^-19 J.

b. The spectral lines are produced by the electrons within the atoms of this element, which can absorb or emit specific amounts of energy to move between different energy levels. These energy transitions result in the emission or absorption of photons with specific wavelengths and frequencies, giving rise to the observed emission spectrum.

c. The violet emission line represents the photon with the most energy since it has the shortest wavelength (400 nm) and highest frequency (7.50 x 10^14 Hz) among the lines shown. This highest energy does not necessarily represent the energy of the valence electrons, but rather corresponds to the specific energy transitions occurring within the atoms of the element.

d. Emission spectra can be used to determine the gases present in the atmosphere of a far-away planet by analyzing the specific wavelengths of the emitted or absorbed light from the planet. Each gas has a unique emission or absorption spectrum, allowing scientists to identify the gases present in the planet's atmosphere.

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Answer:

Combustion

Explanation: Because a reactant is reacting with O2.

Answer:

lt serves as a home where crews of astronauts and cosmonauts live. The space station is also a unique science laboratory. Several nations worked together to build and use the space station. The space station is made of parts that were assembled in space by astronauts.

Explanation:

Answer:

N

Explanation:

N can get the clip from 8cm away....the others are less ...so N appears to be the strongest magnet

Converting 100. g of ice at 0.00 °C to water vapour at 100.00 °C requires 301 kJ of energy.

Answer:

301 kj amount of energy is needed to melt 100g grams of ice in 0 degrees celcius

Explanation:

In the solid state of matter, particles, such as atoms, ions, or molecules, are closely packed and held together by strong intermolecular forces, such as ionic bonds, metallic bonds, or covalent bonds.

In a solid, particles have enough energy to vibrate around fixed positions but do not have enough energy to overcome the attractive forces between them. These attractive forces, also known as cohesive forces, arise from the electrostatic interactions between particles or the sharing of electrons in covalent bonds.

The energy of the particles in a solid is typically much lower than in the liquid or gaseous states, resulting in a fixed arrangement of particles.

The movement of particles in a solid is characterized by vibrations or oscillations around their equilibrium positions.

These vibrations occur due to the thermal energy present in the solid, but the particles remain relatively fixed in their positions due to the strong attractive forces. The amplitude of the vibrations increases with increasing temperature, as the particles gain more thermal energy.

However, the particles in a solid do not have enough energy to break the intermolecular bonds and move freely throughout the entire solid. Instead, they can only move within their local vicinity or lattice positions.

This restricted movement is what distinguishes the solid state from the liquid or gaseous states, where particles have enough energy to overcome intermolecular forces and move more freely.

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The information that the percent composition of an atom in a molecule give is the The total mass that element contributes to a molecule. That is option C.

The percent composition of an atom in a molecule is the total mass/amount of an element present in a molecule/compound to the molecular mass of the compound, multiplied by 100.

The mass of an atom is the amount of matter that is contained in that atom.

When you are calculating the percentage composition of an atom in a molecule this is to find out the mass of the atoms of the element that contributes to the given molecule.

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Answer:

Calculate the mass in grams.

Answer: Calculate the mass in grams of calcium bromide the chemist has added to the flask. Round your answer to 3 significant digits.

Explanation:

Answer:

3. The formula for barium chloride is BaCl2 and the molar mass is 208.22 g/mol.

4. The formula for boron trichloride is BCl3 and the molar mass is 119.8 g/mol.

5. The formula for magnesium sulfide is MgS and the molar mass is 95.31 g/mol.

6. The formula for silicon dioxide is SiO2 and the molar mass is 60.08 g/mol.

Answer:

Explanation:

Si tomamos en cuenta el peso molecular del agua, que es equivalente a:

1 Átomo de H₂O

O = 16 gr/mol

H = 1 gr/mol

H₂O = 18 gr/mol

Teóricamente sabemos que en 1 mol de H2O habrá 18 gr.

Para obtener los moles presentes en 1 mg de H₂O, (como 1 gr = 1000 mg), decimos:

1 mol H2O …………………………..  18000 mg

       X          ……………………………   1 mg

X = 1 / 18000 = 5,56 X 10⁻⁵ moles de H20

Y para obtener la cantidad de moléculas presentes, de acuerdo a los moles, multiplicamos por el número de Avogadro (6,023 X 10²³ moléculas /mol)

Moléculas de H₂O = 5,56x 10⁻⁵ mol x 6,023 x 10²³

Moléculas de H₂O = 3,34488 x10¹⁹ moléculas de H₂O

En el copo de nieve habrá 3,34488 x 10¹⁹ moléculas de H₂O.

Espero que te sirva =)

5,43 X 10²² particles of water (H20) are in a collection of snowflakes with a mass of 0.005 g.

The term mole is defined as the amount of substance of a system which contains as many elementary entities.

One mole of any substance is equal to 6.023 × 10²³ units of that substance such as atoms, molecules, or ions. The number 6.023 × 10²³ is called as Avogadro's number or Avogadro's constant.

The mole concept can be used to convert between mass and number of particles.

1 atom of H₂O

O = 16 g/mol

H = 1 gr/mol

H₂O = 18 gr/mol

1 mol H₂O …………………………..  18000 mg

?      X          ……………………………   1 mg

X = 1 / 18000

= 5,43 X 10²² moles de H20

Thus, 5,43 X 10²² particles of water (H20) are in a collection of snowflakes with a mass of 0.005 g.

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Explanation:

0.3,1.2, or 2.1. sorry if it's wrong.