A bond between a nonmetal and a nonmetal is called a(n)
bond.
A. hydrogen
B. metallic
C. covalent
D. ionic

Answer:

Mountain ranges and prevailing winds.

Explanation:

Mountain ranges and prevailing winds are the factors that is responsible for the difference in the precipitation between Nevada and Washington states. The Washington state is located along the coastal region of pacific ocean and having more mountain ranges which causes more rainfall in that region while on the other hand, Nevada state comprise of plateau, basins and far away from the ocean which is the main cause of lower rainfall as compared to Washington state.

: PM2.5 is defined as the mass concentration of particles in the air less than or equal to 2.5 micrometers in diameter.Question 15: False, carbon dioxide (CO2) is not considered a criteria air pollutant.

Question 16: The closest answer is 50%, but the exact percentage is not provided in the question.Question 17: The term "photochemical smog" is most synonymous with ozone (O3), which is a criteria air pollutant.Question 18: True, attainment of ambient air quality standards requires that measured concentrations at all monitoring stations within an air district are below ambient air standards.

Question 14 asks about the definition of PM2.5. PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 micrometers. It represents the mass concentration of particles suspended in the air, which are small enough to be inhaled into the respiratory system and can have adverse health effects.

Question 15 states whether carbon dioxide (CO2) is a criteria air pollutant. Criteria air pollutants are a set of pollutants regulated by environmental agencies due to their detrimental impact on air quality and human health. However, carbon dioxide is not considered a criteria air pollutant because it does not directly cause harm to human health or the environment in the same way as pollutants like ozone or particulate matter.

Question 16 asks about the percentage of carbon monoxide (CO) emissions from mobile sources in Santa Clara County. While the exact percentage is not provided in the question, the closest answer option is 50%. However, it is important to note that the precise percentage may vary depending on specific local conditions and emissions sources.

Question 17 inquires about the criteria air pollutant most synonymous with the term "photochemical smog." Photochemical smog is primarily associated with high levels of ground-level ozone (O3). Ozone is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight, creating a hazy and polluted atmospheric condition.

Question 18 addresses the concept of "attainment" of ambient air quality standards. To achieve attainment, measured concentrations of pollutants at all monitoring stations within an air district must be below the established ambient air quality standards. This ensures that the air quality in the given area meets the required standards for protecting human health and the environment.

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Answer & Procedure

To solve this problem you will need to transform all the concentrations to the equivalence of ppm, which is 1 mg of solute per 1 L of solution.

Calcium: There are 43 μg of calcium in a total volume of 87 mL.

Caffeine: There is 0.91 mg of caffeine in a total volume of 105 mL.

Trace particles: There is 0.47 mg of trace particles in a total volume of 95 dL.

Explanation:

Average speed of a body in motion is the rate of change of distance per unit of time.

 This is expressed as;

          Average speed  = \(\frac{Distance }{time}\)  

1. Distance  = 5000m

    Time  = 50s

      Average speed  = \(\frac{5000}{50}\)   = 100m/s

2. Distance  = 300m

   Time  = 100s

      Average speed  = \(\frac{300}{100}\)   = 3m/s

3. Distance  = 550m

   Time  = 120s

   Average speed  =  \(\frac{550}{120}\)   = 4.58m/s

Answer:

448.156 g/mol

Explanation:

hope it helps

stay safe and god bless

Aluminum ion has a charge of 3+, Al³⁺, and sulfate is SO₄²⁻, so the compound aluminum sulfate has to have a number of aluminum and sulfate such that the final charge is zero, so the proportion on aluminum sulfate is:

That way we have 6+ and 6-, so neutral compound.

This means that for 1 mol of aluminum sulfate, we have 2 moles of aluminum ion. The molar concentration is the number of moles of solute divided by the volume of solution, so it is directly proportional to the number of moles.

So, we can use a rule of three as follows:

aluminum ion --- aluminum sulfate

2 --- 1

x --- 0.646 M

So:

So, the concentration of aluminum ion in this solution is 1.292 M.

Answer:

C. Hydrogen ion donor.

Explanation:

According to bronsted -lowery an acid is a substance that donates a proton (H+) to other substances.

The mass per cent of the mixture is 0%.

What is Raoult's law?

The vapour pressure of an ideal solution is correlated with the mole fraction of its constituents according to the physical chemistry principle known as Raoult's law. Raoult's law states that the product of a component's mole fraction in the solution and the vapour pressure of the pure component determines the partial vapour pressure of that component in an ideal solution.

Raoult's law, which states that the vapour pressure of a component in an ideal solution is proportional to its mole fraction in the solution, can be used to determine the mass percent of each ingredient in the mixture.

We may use Raoult's law to determine the mole fraction of each component given the vapour pressures at 40.0°C. Assume that \(CCl4\) has a mass percent of x and  \(C2H4Cl2\)has a mass percent of y. Consequently, the mixture's mass percentage is\(100-(x+y).\)

First, calculate the mole fractions:

For  \(CCl4\):

\(X_{\text{CCl4}} = \frac{{\text{partial pressure of CCl4}}}{{\text{total pressure of mixture}}} = \frac{{0.293 \, \text{atm}}}{{0.250 \, \text{atm}}}\)

For  \(C2H4Cl2\):

\(X_{\text{C2H4Cl2}} = \frac{{\text{partial pressure of C2H4Cl2}}}{{\text{total pressure of mixture}}} = \frac{{0.209 \, \text{atm}}}{{0.250 \, \text{atm}}}\)

The mole fraction of the mixture is :

\(X_{\text{mixture}} = X_{\text{CCl4}} + X_{\text{C2H4Cl2}}\)

then, calculate the mass percent of each substance:

For  \(CCl4\):

\($\text{Mass percent of CCl4} = \frac{{X_{\text{CCl4}} \times \text{MMCCl4}}}{{X_{\text{mixture}} \times \text{MMCCl4} + X_{\text{C2H4Cl2}} \times \text{MMC2H4Cl2}}} \times 100$\)

For  \(C2H4Cl2\):

\($\text{Mass percent of CCl4} = \frac{{X_{\text{CCl4}} \times \text{MMCCl4}}}{{X_{\text{mixture}} \times \text{MMCCl4} + X_{\text{C2H4Cl2}} \times \text{MMC2H4Cl2}}} \times 100$\)

so, the mass percent of the mixture is given as:

\($\text{Mass percent of C2H4Cl2} = \frac{{X_{\text{C2H4Cl2}} \times \text{MMC2H4Cl2}}}{{X_{\text{mixture}} \times \text{MMCCl4} + X_{\text{C2H4Cl2}} \times \text{MMC2H4Cl2}}} \times 100$\)

\(Mass percent of mixture = 100 - (\text{Mass percent of CCl4} + \text{Mass percent of C2H4Cl2})\\= 100 - (57.8 + 42.2)\\= 100 - 100\\= 0\)

Therefore, the mass percent of  \(CCl4\)in the mixture is approximately 57.8%, the mass percent of \(C2H4Cl2\)is approximately 42.2%, and the mass percent of the mixture is 0%.

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Answer:

Sodium and Chlorine would be the answer for this :)

Answer:

Efflorescence is a deposit of salts, usually white, formed on a surface, the substance having emerged in solution from within either concrete or masonry and subsequently precipitated by evaporation

Answer: good

Explanation:

 tyuk

The specific heat capacity of Aluminum of mass 3 grams that was heated from 20 °C to 662 °C while absorbing 1728 J of heat is 12.5 J/g°C.

The specific heat capacity of a substance can be calculated using the following formula:

Q = m × c × ∆T

Where;

According to this question, 3 grams of Aluminum was heated from 20 °C to 66.2 °C while absorbing 1728 J of heat.

1728 = 3 × c × (66.2 - 20)

1728 = 138.6c

c = 1728 ÷ 138.6

c = 12.5 J/g°C

Therefore, the specific heat capacity of Aluminum of mass 3 grams that was heated from 20 °C to 662 °C while absorbing 1728 J of heat is 12.5 J/g°C.

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Answer: Predominant tropical easterly winds sweep across the central and southern portions of the state, keeping the temperatures mild

Explanation:

bc

3.9 tons of A and 1.8 tons of B must be burned for Steam power plants.

Steam power plants consist of boilers, steam turbines, generators, and other ancillary equipment. Boilers produce high pressure, high temperature steam. A steam turbine converts the thermal energy of steam into mechanical energy. The generator then converts mechanical energy into electrical energy. 

The amount of tons of each type of coal the Steam power plants must have burned is represented by the vector equation:

x1v1 + x2v2 = b

\(\left[\begin{array}{ccc}27.6&3100&250\\30&6400&360\\23&23610&1623\end{array}\right]\)

where first row represents v1, second row represents v2 and third row represents v3.

3.9 tons of A and 1.8 tons of B must be burned.

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When an organism's cells only have one set of chromosomes, the organism is said to be haploid. All organisms that reproduce sexually are diploid (having two sets of chromosomes, one from each parent). Only the egg and sperm cells in humans are haploid.

The term "diploid" describes an organism's cells having two full sets of chromosomes, with one chromosome from each parent present in each pair. Since humans are diploid, the majority of their cells have 23 pairs of chromosomes.

Distinguish between haploid and diploid.

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Answer:

Hey there!

This is already rounded to four significant figures!

Zeroes after the decimal but before the 7 don't count, and 7, 0, 6, and 2 count as significant figures.

So, the answer would be 0.007062.

Let me know if this helps :)

4 significant figures are there in 0.007062.

“The term significant figures refer to the number of important single digits (0 through 9 inclusive) in the coefficient of an expression in scientific notation.

The number of significant figures in an expression indicates the confidence or precision with which an engineer or scientist states a quantity.”

Zeroes after the decimal but before the 7 don't count, and 7, 0, 6, and 2 count as significant figures.

Hence, 4 significant figures are there in 0.007062.

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At the transition stage, one form of matter starts getting converted into another form of matter.

Solid, liquid and gas are the three phases in which matter occur in nature. Matter is interconvertible in nature i.e it can be converted from one form to another.

Melting, freezing and evaporation are the three phases of transition.

Liquid water at low temperature freezes to form solid ice. This process is known as freezing. Whereas, liquid water when provided high temperature or heat releases vapours. This process is known as evaporation. Solid ice when brought at room temperature gets converted back into liquid water. This process is known as melting.

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The values and calculate △C: △C = △A / (εΔl)

The change in concentration (△C) of NADH oxidized per minute in the mitochondrial and microsomal fractions using the Beer-Lambert law, we need to know the change in absorbance (△A), the extinction coefficient (ε), and the path length (Δl).

The change in absorbance (△A):

△A represents the change in absorbance of light at a specific wavelength. It can be obtained by measuring the initial and final absorbance values.

The path length (Δl) is the distance the light travels through the sample. It is typically measured in centimeters (cm).

The change in concentration (△C):

Using the Beer-Lambert law equation, △A = εΔCl, we can rearrange it to solve for △C:

△C = △A / (εΔl)

Convert the extinction coefficient (ε):

An extinction coefficient of 6.3 mM^−1 cm^−1, we need to convert it to μM^−1 cm^−1 by dividing by 1000:

ε = 6.3 mM^−1 cm^−1 = 6.3 μM^−1 cm^−1

Putting in the values and calculate △C:

△C = △A / (εΔl)

By substituting the appropriate values of △A, ε, and Δl into the equation and performing the calculations, you can determine the change in concentration of NADH oxidized per minute in the mitochondrial and microsomal fractions as μM NADH oxidized. min^−1.

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Answer:

1. The endurance capacity of your respiratory muscles – including the diaphragm and intercostal muscles – increases, allowing deeper, fuller and more efficient breaths when you run. ... The more you run, the more alveoli you grow. These take oxygen and transport it into the capillaries.

Explanation:

The comparable rates can not be determined from the graph shown. Option B.

The rate of reaction refers to the speed at which a chemical reaction takes place. It quantifies how quickly reactants are consumed or how rapidly products are formed during a chemical reaction. The rate of reaction is typically expressed as the change in concentration of a reactant or product per unit of time.

We can see that the graph does not clearly show the dynamics of the changes in the rate of D and E hence the comparable rates can not be determined.

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When hydrogen and oxygen combine to form water (H2O), the limiting reactant is determined by the relative numbers of hydrogen and oxygen molecules present. The limiting reactant is the reactant that is completely consumed in a reaction, and it limits the amount of products that can be produced.

The reactant that is present in excess is called the excess reactant. The balanced chemical equation for the reaction of hydrogen gas (H2) and oxygen gas (O2) to form water (H2O) is:2H2(g) + O2(g) → 2H2O(g)To figure out which reactant is the limiting reactant, we must first convert the given masses of hydrogen and oxygen to the number of moles present. We can use the molar mass of each substance and the given masses to determine the number of moles:

Mass of hydrogen (H2) = 5.00 gMolar mass of H2 = 2.02 g/molNumber of moles of H2 = 5.00 g / 2.02 g/mol ≈ 2.48 molMass of oxygen (O2) = 10.0 gMolar mass of O2 = 32.00 g/molNumber of moles of O2 = 10.0 g / 32.00 g/mol ≈ 0.3125 molBased on the balanced chemical equation, we can see that 2 moles of hydrogen react with 1 mole of oxygen to form 2 moles of water.

Therefore, for every mole of oxygen that reacts, 2 moles of hydrogen are required. Since we have more moles of hydrogen than moles of oxygen, hydrogen is present in excess and oxygen is the limiting reactant.The limiting reactant is the reactant that is completely consumed in the reaction and it limits the amount of products that can be produced. Therefore, in the reaction between hydrogen and oxygen, oxygen is the limiting reactant.

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Answer:

4.5M

Explanation:

Here is why:

Subtract the mass of the solute from the whole solution volume.

Molarity, percent by mass, and percent by volume are all ways to represent concentration.

By dividing the number of moles by the number of liters of water utilized in the solution, we can compute the molar concentration. Here, for instance, 1.25 L of water has entirely dissolved the acetic acid. In order to determine the molar concentration, which is 0.1332 M, divide 0.1665 moles by 1.25 L. A titration is a method for figuring out the concentration of an unknown solution by using a solution with known concentration.

Finding the concentration for each sample's absorbance on the standard curve is the first step in calculating the sample concentration based on the standard curve. The next step is to multiply the concentration by the dilution factor for each sample.

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The four elements make up the bulk of all living things are hydrogen, carbon, oxygen and the nitrogen. they make up the human body of about 96 %.

The 25 elements are most important for the life. the four most important are present in about 96 % are :

the some of the elements are present in about 3.5 % are : calcium, phosphorus, potassium, sulfur, sodium , chlorine and magnesium . the rest are present in the trace amount about 0.5 %. oxygen is the most common element present in the human body. carbon is versatile element which can make the bond by itself.

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a) 25.0 mL of the compound has a mass of 17.95 g.

b) The cost of this amount of the compound is $31.43 ($1.75 x 17.95 g).

Answer: Gases are highly compressible because they are less dense than other states of matter. It’s intermolecular force of attraction is less and it has more space between the molecules. Therefore, it is easy to compress the gas.

Explanation:

Answer:

wrong.

Explanation: charged atoms have have more electrons than neural because  they charge it . a  neural atom has eaqual number of electrons and neutrons.

hope this helps(^人^)

Answer:

oppositely charged ions in a chemical compound

Explanation:

Answer:

Between ions

Explanation:

At equilibrium, the concentrations of A, B, and C are 0.112 M, 0.212 M, and 0.188 M, respectively.

The standard free-energy change (ΔG°) of reaction is -3.06 kJ/mol, which can be related to equilibrium constant (K) using following equation:

ΔG° = -RTlnK

where R is gas constant (8.314 J/mol·K),

T is temperature in Kelvin (25°C = 298 K), and

ln is natural logarithm.

-3.06 kJ/mol = -8.314 J/mol·K x 298 K x lnK

Solving for lnK:

lnK = -3.06 kJ/mol / (-8.314 J/mol·K x 298 K) = 0.447

Taking, antilogarithm of both sides to solve for K:

K = e^0.447 = 1.563

At equilibrium, concentrations of A, B, and C can be calculated using stoichiometry of the reaction and equilibrium constant expression:

K = [C] / ([A] x [B])

1.563 = [C] / (0.30 M x 0.40 M)

[C] = 0.188 M

Since, stoichiometry of reaction is 1:1:1, [A] and [B] at equilibrium will be:

[A] = [A]0 - [C] = 0.30 M - 0.188 M = 0.112 M

[B] = [B]0 - [C] = 0.40 M - 0.188 M = 0.212 M

Therefore, at equilibrium, the concentrations of A, B, and C are 0.112 M, 0.212 M, and 0.188 M, respectively.

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