CuSO4 x 7 H₂O formula mass in chemistry ​

The given statement, As noted in chapter 14, the exhaust and fly ash from the burning of coal releases many toxic chemicals harmful to life, including humans is True.

Because Externalized costs are costs that are incurred by people other than those directly involved in an activity. In the case of coal burning, the exhaust and fly ash releases many toxic chemicals, such as mercury, that are harmful to life and human health.

Mercury is concentrated in animal tissues, leading to neurological disorders and other health problems. Therefore, the indirect costs associated with the use of coal best represent externalized costs. The indirect costs associated with the use of coal, such as the release of toxic chemicals and the resulting health problems, are examples of externalized costs.

Externalized costs are those that are not directly paid for by the producer or consumer of a product or service, but are instead borne by society as a whole. In the case of coal, the externalized costs include the negative impacts on the environment and public health from the release of harmful substances during the burning of coal. These costs are not reflected in the price of coal, and therefore are not directly paid for by the producer or consumer, but are instead borne by society as a whole.

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250 L of 5.0% w/v glucose solution can be prepared using 125 g of glucose.

w/v = [ mass of solute (g) / volume of solution (mL) ] × 100

5.0 % w/v = [ 125 g / volume of solution (mL) ] × 100

volume of solution (mL) = [ 125 g / 5.0 % w/v ] x 100

volume of solution (mL) = [ 125 g / (5.0 / 100) ] x 100

volume of solution (mL) = [ 125 g / 0.05 ] x 100

Explanation:  C) the air temp. at the top is lower

Answer:

THE ANSWER IS A

Explanation:

In a synthesis reaction, the elements Fe and S might react to form FeS.

Given :

The elements Fe and S might react to form a product,

To find:

The product of the synthesis reaction.

Solution:

The synthesis reaction is a type of chemical reaction in which two more different substances are combined together to give a single product,

When iron (Fe) and sulfur react the product will be formed will have both iron atoms and sulfur atoms.

\(Fe+S \rightarrow FeS\)

In a synthesis reaction, the elements Fe and S might react to form FeS.

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The theoretical yield of I2 in the reaction would be 0.23 g

This refers to the stoichiometric yield of a reaction.

From the equation of the reaction:

Ca(IO3)2 + 10 KI + 12 HCl → 6 I2 + CaCl2 + 10 KCl + 6 H2O

The mole ratio of Ca(IO3)2 and I2 is 1: 6

Mole of 15.00 mL, 0.0100 M Ca(IO3)2 = 15/1000 x 0.0100

                                                              = 0.00015 mole

Equivalent mole of I2 = 0.00015 x 6

                                      = 0.009 mole

mass of 0.0009 I2 = 0.0009 x 253.809

                                = 0.23 g

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Answer:

Places that get more solar energy have more heat. Places that get less solar energy have less heat. The air above the areas receiving more heat warms up and rises. Because of this, the air, ocean, and Earth's surface gets heated at the equator more than at the poles.

Explanation:

Answer:

no

Explanation:

The poles receive less energy than the equator, hence the poles being colder than the equator.

Answer:

La ley de los gases ideales relaciona cuatro propiedades macroscópicas de los gases ideales (presión, volumen, número de moles y temperatura). Si conocemos los valores de tres de estas propiedades, podemos utilizar la ley de los gases ideales para conocer la cuarta. En este video, usaremos la ley de los gases ideales para resolver el número de moles (y en última instancia de moléculas) en una muestra de un gas

Explanation:

The average seismic wave speeds at a depth of 90 km in volcanic areas, They typically travel at speeds ranging from 1 to 14 km/h. The slower values represent a P-wave traveling in water, while the higher numbers represent a P-wave speed near the Earth's mantle's core.

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Answer: Entropy is sometimes described as the degree of randomness in a system.

The chemical formula for the molecule you provided is C2H5Cl.

In the molecule, the central atom is carbon (C), which is bonded to two hydrogen atoms (H) and one chlorine atom (Cl). The carbon atom forms single bonds with each of the hydrogen and chlorine atoms, resulting in a linear structure.

To write the chemical formula, we start by indicating the number of atoms of each element present in the molecule. In this case, there are two carbon atoms (C2), five hydrogen atoms (H5), and one chlorine atom (Cl1).

Next, we write the symbols for the elements in the order of their appearance. The formula is typically written with the carbon atom first, followed by hydrogen, and then any other elements in alphabetical order. Therefore, the chemical formula for the molecule is C2H5Cl.

The subscripts in the formula indicate the number of atoms of each element in the molecule. In this case, there are two carbon atoms, five hydrogen atoms, and one chlorine atom.

It's important to note that the formula represents the simplest ratio of atoms in the molecule. It does not provide information about the spatial arrangement or bonding pattern of the atoms. Additional structural information, such as the arrangement of atoms in space, would require a more detailed representation, such as a Lewis structure or a three-dimensional model.

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58.44 g.

Explanation:

Skill 3-1 Calculate the molecular mass of a compound as the sum of the atomic masses of its elements. So, one mole of water (6.022 x 10 23 molecules) has a mass of 18.02 g. One mol of NaCl (6.02 x1023 formulas) has a mass of 58.44 g.

Answer:

heterogeneous mixture

Explanation:

because pizza has different phases I think

The type of mixture that pizza can be classified is Heterogeneous mixture

Therefore, heterogeneous mixture can be regarded as one having more than a substance.

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Two types of data that can be obtained from descriptive statistics include frequency distribution and variability in the data set. These data are calculated as the mean of standard deviation in the case of variation.

The relative importance of the science field of descriptive statistics is based on the obtention of statistically significant measurements in order to validate a hypothesis.

Therefore, with this data, we can see that the relative importance of the science field of descriptive statistics is based on testing working hypotheses.

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Answer:

I think it's B

Explanation:

I dont have much experience with the periodic table, but I just think its B.

Answer:

it's either B or C

Explanation:

I don't have that much experience for this but im giving you my honest answer i hope this will help ;3

Answer:

0.0238 moles NaOH

Explanation:

To find the amount of moles, you need to

(1) convert the volume from mL to L (1,000 mL = 1 L)

(2) calculate the amount of moles (using the molarity equation)

It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs.

 125.0 mL NaOH                  1 L
---------------------------  x  ---------------------  =  0.1250 L NaOH
                                         1,000 mL

Molarity = moles / volume (L)                    <----- Molarity equation

0.190 M = moles / 0.1250 L                       <----- Insert values

0.0238 = moles                                         <----- Multiply both sides by 0.1250

Answer:

Explanation:

If a zero is found between significant digits, it is significant

The pOH of the 0.001 M NaOH solution is approximately 3.

To determine the pOH of a solution, we need to know the concentration of hydroxide ions (OH-) in the solution.

In the case of a 0.001 M NaOH solution, we can assume that all of the NaOH dissociates completely in water to form Na+ and OH- ions. Therefore, the concentration of hydroxide ions in the solution is also 0.001 M.

The pOH is calculated using the equation:

pOH = -log[OH-]

Substituting the concentration of hydroxide ions, we have:

pOH = -log(0.001)

Using a calculator, we can evaluate the logarithm:

pOH ≈ 3

Therefore, the pOH of the 0.001 M NaOH solution is approximately 3.

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At a given temperature, solubility is the maximum amount of a substance that will dissolve in a given amount of solvent. Temperature and pressure are two direct factors that influence solubility. Temperature influences the solubility of both solids and gases, whereas pressure influences only the solubility of gases.

Polar molecules primarily attract water molecules via hydrogen bonding. They successfully compete with hydrogen bonds between water molecules, making them easily soluble in water.

Because nonpolar molecules lack regions of partial positive or partial negative charge, they are not electrostatically attracted to water molecules. When nonpolar substances are added to water, they remain separate and form layers or droplets rather than dissolving.

Thus, If molecules are non-polar, this means there are no dipoles or entire charges on the atoms in the compound.

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Answer:

among these which is not a base is CaSO4

A precipitate is an insoluble solute formed in a solution. No precipitate will form when magnesium acetate and strontium chloride react as they produce a soluble salt.

A precipitate is an insoluble particle that is formed when the ionic compounds react to produce insoluble salt.

Reaction when magnesium acetate and strontium chloride reacts is shown as:

Mg(CH₃COO)₂ (aq) +SrCl (aq) → MgCl₂ (aq) +Sr(CH₃COO)₂ (aq)

The substance containing acetate in the compound is always soluble and hence cannot make precipitate. Also, chloride gets soluble with magnesium.

Therefore, no precipitate will be formed.

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Answer:

Rough and irregular surface

these surfaces tends a lot of friction

but on smooth surface there is least friction

hope it helps

The steps in the engineering process in order is D. Identifying a problem, brainstorming solutions, researching the background of each solution, testing solutions, choosing a solution, production, making future improvements.

The initial step involves recognizing the predicament that requires resolution. One may achieve this through collaborating with fellow engineers, consulting customers, or conducting studies. After recognizing the issue at hand, the subsequent course of action involves generating ideas or solutions to address it. One way to achieve this is to generate a large number of ideas.

The subsequent phase necessitates the experimentation of potential answers. To achieve this, one must take into account both the outcomes of the assessments and the advantages and disadvantages associated with every proposed resolution. The subsequent action entails generating the resolution. One way to accomplish this is to create a prototype, while another is to manufacture the solution in large quantities. The last stage involves enhancing forthcoming developments.

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Fluids are liquid and gases. They take the shape of their containers. They are called fluids because of their ability to flow.

Answer:

i voted her!!!!

Explanation:

The empirical formula for a compound composed of 9.93% carbon, 58.6% chlorine, and 31.4% fluorine is CCl₂F₂.

To write the empirical formula, let us assume that total mass of the compound is 100 g, then-

Mass of carbon = 9.93 g

Mass of chlorine = 58.6 g

Mass of fluorine = 31.4 g

We know that,

Molar mass of Carbon = 12.0 g/mol

Molar mass of Chlorine = 35.5 g/mol

Molar mass of Fluorine = 18.9 g/mol

Now, we will calculate the number of moles of each using the formula -

Number of moles = Given mass

                                 Molar mass

Moles of Carbon =   9.93 g     = 0.82 mol

                               12.01 g/mol

Moles of Chlorine =    58.6 g     = 1.65 mol

                                 35.5 g/mol

Moles of fluorine =    31.4 g     = 1.66 mol

                                18.9 g/mol

Now, divide each value with the smallest amount of mole we got,

carbon = 0.82 = 1

               0.82

chlorine = 1.65 =  2

                 0.82

fluorine = 1.66 = 2

                0.82

Therefore, the empirical formula of the compound can be written as - CCl₂F₂

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Approximately 631.5 liters of dry air at 25°C and 750 torr would need to be processed to produce 150 liters of liquid \(O_2\) -183°C.

To solve this problem, we need to consider the ideal gas law and the molar volume of gases.

First, we can calculate the number of moles of oxygen in 150 L of liquid \(O_2\) at -183°C. To do this, we divide the mass of liquid oxygen by its molar mass:

Mass of liquid oxygen = volume of liquid oxygen * density of liquid oxygen = 150 L * 1.14 g/mL = 171 g

Molar mass of oxygen (O2) = 32 g/mol

Number of moles of oxygen = mass of oxygen / molar mass of oxygen = 171 g / 32 g/mol ≈ 5.34 mol

Since the mole fraction of oxygen in dry air is given as 0.21, we can calculate the total moles of dry air needed to produce 5.34 mol of oxygen:

Moles of dry air = moles of oxygen / mole fraction of oxygen = 5.34 mol / 0.21 ≈ 25.43 mol

Now, we can use the ideal gas law to calculate the volume of dry air at 25°C and 750 torr (convert to atm) that corresponds to 25.43 mol:

PV = nRT

P = 750 torr * (1 atm / 760 torr) ≈ 0.987 atm

V = volume of dry air (unknown)

n = 25.43 mol

R = 0.0821 L·atm/(mol·K)

T = 25°C + 273.15 = 298.15 K

Solving for V:

V = nRT / P = (25.43 mol)(0.0821 L·atm/(mol·K))(298.15 K) / 0.987 atm ≈ 631.5 L

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Answer:

if you weigh 100 pounds on Earth, you would weigh only 38 pounds on Mercury. That's because Mercury weighs less than Earth, and therefore its gravity would pull less on your body. If, on the other hand, you were on heavy Jupiter, you would weigh a whopping 253 pounds!