pm10 is a term used for particles that are larger than or equal to 10 µm (micro meter) in diameter. group of answer choices true false

Answer:

vacuole

Explanation:

Brainliest please

The incorrect statement is (b): the value of q is positive in an endothermic process.

(a) Enthalpy is a state function, which means that it depends only on the initial and final states of a system and not on the path taken to get there.

(b) The value of q is negative in an endothermic process because heat is flowing into the system from the surroundings, which means that the surroundings are losing heat. By convention, q is positive when heat flows out of a system and negative when heat flows into a system.

(c) The value of q is positive when heat flows into a system from the surroundings, which means that the system is gaining heat.

(d) Heat flows from the surroundings into a system in an endothermic process, which means that the system is absorbing heat from the surroundings.

(e) Internal energy is a state function, which means that it depends only on the initial and final states of a system and not on the path taken to get there.

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Answer:

C

Explanation:

A gas is a state of matter that has no fixed shape and no fixed volume gases have lower density than other states of matter such as solids and liquids.

Answer: The Answer is A.

Explanation:

The amount of energy is directly proportional to the photon's electromagnetic frequency and thus, equivalently, is inversely proportional to the wavelength. The higher the photon's frequency, the higher its energy. Equivalently, the longer the photon's wavelength, the lower its energy.

Hope this Helps!

The photon energy, wavelength, and frequency are the characteristic of the waves and particles. "The photon frequency is proportional to energy and inversely proportional to wavelength." Thus, option A is correct.

Photon energy has been defined as the energy constituted by the photon of the atom. It is given by the product of Planck's constant and wave frequency. The frequency of the photons is in inverse relation to the wavelength. It is given as,

E = hυ  = h c / λ

Here, E is energy, h is Planck's constant, c is the speed of light, υ id frequency, and λ is the wavelength.

On the other hand, the frequency is in direct relation to the energy. The higher the frequency of the photons higher will be its energy.

Therefore, option A. frequency is inversely proportional to the wavelength.

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A geometrical isomer with like groups located on opposite sides of the metal atom is denoted with the prefix trans-. So fifth option is the correct answer.

Isomers are molecules with the same chemical formula but different spatial arrangements. In coordination complexes, such as transition metal complexes, geometrical isomerism can occur when ligands are arranged differently around the metal atom.

The term "trans-" is used to describe an isomer where two identical ligands are positioned on opposite sides of the metal atom. This arrangement is characterized by a symmetrical configuration across the metal-ligand bonds.

In contrast, the prefix "cis-" is used when the like groups are located on the same side. The prefixes bis- and tetrakis- are used to indicate the number of ligands, while d- denotes a coordination complex with two ligands.

So fifth option is the correct answer.

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Answer:

water and a salt

Explanation:

Answer:

A.   it is the lowest at low temperatures

Explanation:

It is true with respect to the kinetic energy of a molecule that the it is the lowest at low temperatures.

The kinetic energy of a molecule is the energy due to the motion of the particles within a substance.

Answer:

A.  it is the lowest at low temperatures

B.  it increases at low temperatures

C.  it is the same at all temperatures

D.  it is the lowest at high temperatures

Answer: This lab's goal is to investigate the absorbance patterns created by recently discovered moons and planets.

The first moon consists of Lithium and carbon, the second moon consists of sodium and nitrogen. Moving onto the planets, the first planet consists of hydrogen and carbon, and lastly, the second planet is consistent with helium and carbon.

How to explain the lab report

The theory was right; there have been no flaws in the outcome. The astronomical item observed by the spectrometer is the independent variable. The spectrum of any astronomical object is the dependent variable.

Space consists of bodies with different types of the electromagnetic spectrum. This includes high-energy bodies emitting radiation in short wavelengths and extremely short wavelengths such as in UV spectrum, X rays, and gamma rays. Conversely, other bodies might be emitting radiations in the longer wavelengths such as Microwaves and Radio waves.

The element missing from the moons and the planets would be Oxygen. It is to be remembered that Oxygen forms the base of the sustenance of life forms on Earth and forms an indispensable part of the carbon cycle. In the absence of oxygen, these planets and moons remain lifeless.

Stars emit heat and light. Along with the heat and light, radiations are emitted by the star. These radiations travel outward from stars and work as the signature of the stars. By analyzing the radiations from the stars, scientists back on Earth could deduce the physical conditions in the heart of a star including its constitution, temperature, and surface conditions.

The knowledge of the constitution of the elements making up the moon or planet is necessary to ascertain the life-sustaining capability of the same.

Answer: This lab's goal is to investigate the absorbance patterns created by recently discovered moons and planets.

The first moon consists of Lithium and carbon, the second moon consists of sodium and nitrogen. Moving onto the planets, the first planet consists of hydrogen and carbon, and lastly, the second planet is consistent with helium and carbon.

How to explain the lab report

The theory was right; there have been no flaws in the outcome. The astronomical item observed by the spectrometer is the independent variable. The spectrum of any astronomical object is the dependent variable.

Space consists of bodies with different types of the electromagnetic spectrum. This includes high-energy bodies emitting radiation in short wavelengths and extremely short wavelengths such as in UV spectrum, X rays, and gamma rays. Conversely, other bodies might be emitting radiations in the longer wavelengths such as Microwaves and Radio waves.

The element missing from the moons and the planets would be Oxygen. It is to be remembered that Oxygen forms the base of the sustenance of life forms on Earth and forms an indispensable part of the carbon cycle. In the absence of oxygen, these planets and moons remain lifeless.

Stars emit heat and light. Along with the heat and light, radiations are emitted by the star. These radiations travel outward from stars and work as the signature of the stars. By analyzing the radiations from the stars, scientists back on Earth could deduce the physical conditions in the heart of a star including its constitution, temperature, and surface conditions.

The knowledge of the constitution of the elements making up the moon or planet is necessary to ascertain the life-sustaining capability of the same.

Answer 1:

a variable whose value depends on that of another

Example 1:

In a study to determine whether how long a student sleeps affects test scores, the independent variable is the length of time spent sleeping while the dependent variable is the test score.

Answer 2:

a variable whose variation does not depend on that of another.

Example 2:

The dependent variable is the variable that is being measured or tested in an experiment. For example, in a study looking at how tutoring impacts test scores, the dependent variable would be the participants' test scores, since that is what is being measured.

Independent Variable is a variable (often denoted by x) whose variation does not depend on that of another.

Example: A scientist is testing the effect of light and dark on the behavior of moths by turning a light on and off. The independent variable is the amount of light

Dependent Variable is a variable (often denoted by y) whose value depends on that of another.

Example: A scientist is testing the effect of light and dark on the behavior of moths by turning a light on and off. The moth's reaction is the dependent variable.

Long term (current) utilisation anticoagulants, ICD-10 code Z79. 01, is a medical classification listed by WHO under the range - Factors that affect the medical status and contact with healthcare.

In the United States, acceptance of ICD-10-CM was slow. Since 1979, the United States has required ICD-9-CM codes[2] for Medicare and Medicaid reimbursement claims, and indeed the majority of the American medical industry has followed suit.

ICD-10 (without diagnostic and therapeutic extensions) was implemented for reporting mortality on January 1, 1999, but ICD-9-CM was still in use for morbidity. Meanwhile, the WHO granted the National Center for Health Statistics (National center for education statistics) of the United States permission to develop a clinical modification of the ICD-10.

The US Centers for Medicare and Medicaid Services (HHS) proposed a novel code sets for reporting treatments and methods on healthcare purchases on August 21, 2008. The ICD-9-CM code configurations would be replaced by ICD-10-CM code sets on October 1, 2013, according to the proposal.

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Answer:

3.7 mL

Explanation:

Step 1: Given data

Volume of water before the chalk is added: 8.7 mL

Volume of water after the chalk is added: 12.4 mL

Volume of the chalk: ?

Step 2: Calculate the volume of the chalk

The volume of the chalk is equal to the volume of water after the chalk is added minus the volume of water before the chalk is added.

V = 12.4 mL - 8.7 mL = 3.7 mL

a. in colder water. Cold water has higher oxygen solubility due to the inverse relationship between temperature and gas solubility.

The solubility of gases, including oxygen, in water is affected by various factors. One of the key factors is temperature. In general, the solubility of gases decreases with increasing temperature. This means that colder water can hold more oxygen in solution compared to warmer water. When water is cold, its molecules are closer together, creating a denser environment. This dense environment provides more opportunities for oxygen molecules to dissolve and stay in solution. On the other hand, warmer water molecules move more vigorously and are further apart, reducing the chances for oxygen to dissolve and stay in solution. Therefore, colder water has a greater capacity to hold oxygen in solution. This is an important factor in aquatic ecosystems as it affects the availability of dissolved oxygen for marine organisms that rely on it for respiration.

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Answer:

dendrites in your sensory neurons

Explanation:

Sensory neurons are first activated, then the stimulus is transmitted horizontally between them, spreading perception through the olfactory bulb that captures the smell of a baked cookie.

After this, the axons are activated to transmit to the motor neurons that will carry out the action of walking towards the kitchen.

Gasoline blending in petroleum refineries involves analyzing the properties of different components and determining the optimal mixing ratios to produce gasoline that meets specific octane rating and quality requirements.

Gasoline blending is a critical process in petroleum refineries where different components are combined to produce the desired gasoline product. In this example, the challenge is to blend gasoline from three different components.

To solve the gasoline blending problem, various factors need to be considered such as the desired octane rating, volatility, and environmental regulations. The first step is to determine the optimal proportion of each component based on their individual characteristics. This involves analyzing the properties of each component, such as its research octane number (RON), motor octane number (MON), and vapor pressure.

The second step is to develop a blending strategy that achieves the desired gasoline specifications. This involves determining the appropriate mixing ratios of the three components to meet the target octane rating and other quality requirements. The blending process requires precise calculations and adjustments to ensure the final gasoline product meets the desired specifications.

Additionally, economic considerations play a role in gasoline blending. The cost of each component and the market demand for specific gasoline grades can influence the blending decisions. Refineries aim to optimize the blend to minimize costs while meeting quality standards.

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True. The spectral lines of each element are distinctive to that element, whether we are looking at emission or absorption lines.

Each element has a unique electron configuration, and the arrangement of electrons in the atom determines the energy levels available. When an electron transitions between energy levels, it either absorbs or emits energy in the form of light. The specific energy differences result in characteristic wavelengths or frequencies associated with each element. These wavelengths, when observed as spectral lines, act as a fingerprint for identifying elements. Whether we observe emission lines (where electrons transition to lower energy levels and emit light) or absorption lines (where electrons absorb specific wavelengths of light), the patterns and positions of the lines remain specific to each element. Thus, the distinctive spectral lines enable the identification of elements in various contexts.

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Answer:

\(\boxed {\tt 376.83 \ grams}\)

Explanation:

The density formula is

\(d=\frac{m}{v}\)

Rearrange the formula for mass, m, by multiplying both sides of the equation by v.

\(d*v=\frac{m}{v}*v\)

\(d*v=m\)

The mass can be found by multiplying density and volume.

The density of the sugar is 1.59 grams per milliliter. The volume is 237 milliliters.

\(d= 1.59 \ g/mL \\v= 237 \ mL\)

Substitute the values into the formula.

\(m= 1.59 \ g/mL * 237 \ mL\)

Multiply. Note that the milliliters, or mL will cancel each other out.

\(m=1.59 \ g * 237\)

\(m=376.83 \ g\)

The mass is 376.83 grams.

Answer:

\( ZnSO_4 + Li_2CO_3 \longrightarrow ZnCO_3 + Li_2SO_4 \)

Explanation:

Here a reaction is given to us and we need to balance the equation . The given reaction is ,

\( ZnSO_4 + Li_2CO_3 \longrightarrow ZnCO_3 + Li_2SO_4 \)

So here , we can make a table as ,

\(\begin{array}{c|c} \\ LHS & RHS \\\\ Zn = 1 & Zn = 1 \\\\ SO_4 = 1 & SO_4 =1\\\\ Li = 2 & Li= 2 \\\\ CO_3 = 1 & CO_3 = 1 \end{array}\)

We can see that the number of elements and ions is same on both LHS and RHS . Hence the reaction is already balanced .

Therefore the final reaction would be same as before that is ,

\( ZnSO_4 + Li_2CO_3 \longrightarrow ZnCO_3 + Li_2SO_4 \)

I hope this helps .

Answer:

The kettle on the stove takes thermal energy from the stove and uses it to convert water into steam at constant temperature. The molecules of water vibrate with increasing speeds when the temperature of water increases. When the temperature of water reaches the boiling point, water starts to change its state to steam.

Explanation:

Blindness is  part of an SDS would you find information about the symptoms and effects of exposure to the chemical substance

Visual impairment is defined by the World Health Organization as exhibiting visual acuity of less than 6/12 in the better eye and by the American Academy of Ophthalmology.

When a person loses all or virtually all of their vision, it is said to be blindness. Vision is lost when someone is blind. Additionally, it could be used to describe a vision loss that cannot be treated with spectacles or contact lenses. You have very little vision if you are partially blind. You cannot see anything and you cannot see light if you are completely blind. When people refer to "blindness," they typically mean total blindness.

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According to the graph, only the reactant A was present at the beginning of the reaction.

The graph shows the concentration for the reactant A and the product that is A2. In this graph, the concentration is displayed on the vertical axis, while the horizontal axis shows the time.

In general terms, it can be observed that at the beginning only the reactant A is present, but as the reaction occurs the concentration of this reactant decreases, while the concentration of the product A2 increases.

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Each isotope's atomic mass unit is substituting. We are given the following percentages: 90% divided by 100% of x 35, 8% divided by 100% of x 37, and 2% divided by 100% of x 38. As a result, the averag atomic mass unit is near to 30 at 35.

Atoms of the same element that have variable numbers of neutrons but the same number of protons are called isotopes.

Average The arithmetic mean is calculated by adding a set of numbers, dividing by their count, and then taking the result. The average of 2, 3, 3, 5, 7, and 10 is one example.

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In metallic bonding, the valence electrons of metal atoms are free to move throughout the entire crystal structure of the metal.

This mobility of electrons in the metal crystal structure is the key feature that contributes to metallic bonding. The delocalized electrons are attracted to the positively charged metal ions, which hold the electrons together in the crystal lattice through electrostatic forces.

The unique behavior of valence electrons in metal elements makes metallic bonding one of the strongest types of chemical bonds, with high melting and boiling points and high tensile strength.

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1. When half of the volume of NaOH required to reach the equivalence point is added to a solution of a weak acid, a buffer solution is produced. A buffer solution is a mixture of a weak acid and its conjugate base (or a weak base and its conjugate acid) that resists changes in pH when small amounts of an acid or base are added.

2. To show that the pH of the solution when half of the volume of NaOH required to reach the equivalence point is equal to the pKa of the weak acid being titrated, we can use the Henderson-Hasselbalch equation:

pH = pKa + log ([A-]/[HA])

where [A-] is the concentration of the conjugate base, [HA] is the concentration of the weak acid, and pKa is the negative logarithm of the acid dissociation constant (Ka).

At the halfway point, the amount of weak acid that has reacted with the added NaOH is equal to the amount of the conjugate base produced. Therefore, the concentrations of the weak acid ([HA]) and its conjugate base ([A-]) are equal:

[A-] = [HA]

Now, we can substitute this relationship into the Henderson-Hasselbalch equation:

pH = pKa + log ([A-]/[HA]) = pKa + log (1) = pKa

So, at the halfway point of the titration, the pH of the solution is equal to the pKa of the weak acid.

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Answer:

the temperature of the star

Explanation:

The color of stars usually indicates the temperature of the star.

A star that is relatively cold usually shows a typical red color.

The hottest stars have a blue color.  

Answer:

Mean/Median/Mode ... A star can be defined by five basic characteristics: brightness, color, ... magnitude is its true brightness irrespective of its distance from earth. ... Astronomers measure a star's temperature on the Kelvin scale. ... not necessarily have the same mass, as stars can vary greatly in density.

Explanation:

hope that helps :)