Why is skeptical attitude important in science

Explanation:

In fluorine

protons = 9

Neutrons = 10

Electrons = 9

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Answer:Compounds are chemical substances that contain more than one element. They're created during a chemical reaction where atoms are rearranged into new compound molecules. For example, if carbon atoms react with oxygen atoms they form carbon dioxide molecules.

Explanation:

The concentration of the solution originally was 1.8 M.

We know that the concentration of the solution is obtained from the formula of the neutralization reaction which is;

CAVA/CBVB = NA/NB

CA =  concentration of the acid

CB = concentration of the base

VA = volume of acid

VB = volume of base

NA = number of moles of acid

NB = number of moles of base

Then

CAVANB = CBVBNA

CA = CBVBNA/VANB

CA =  0.1  * 25 * 1/14.2 * 1

= 0.18 M

Using the formula;

C1V1 = C2V2

25 * C1 =  0.18 * 250

C1 = 0.18 * 250/25

C1 = 1.8 M

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According to stoichiometry and balanced chemical equation  10 moles of lithium metal react to yield 5.00 mole of hydrogen gas.

Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

In the  balanced chemical equation as 2 moles of lithium produce 1 mole of hydrogen.

∴for 5 moles of hydrogen to be liberated,5×2/1=10 moles of lithium are required.

Thus, 10 moles of lithium are required to react to yield 5 moles of hydrogen gas.

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Answer:

overy is the correct but its not here maby Roor?

i hope this helps<33 :)

The potential energy of the pendulum can be modeled off of the basic equation PE = mgh.

where h is the height and g is the acceleration brought on by gravity. This equation is frequently used to simulate items falling freely.The pendulum is not falling freely; instead, it is restrained by the rod or string.

As a result, we must express the height in terms of the angle and the pendulum's length L. Therefore, h = L(1 - COS) The formula for kinetic energy is KE= 12mv2, where m is the pendulum's mass and v is its speed. The pendulum is temporarily immobile when it is at its highest point (Point A).

There is no kinetic energy in the pendulum; all of its energy is gravitational potential energy. If friction and other non-conservative factors are ignored, we see that in a straightforward.

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Answer: C.  partially ionizes and is corrosive to metals

Explanation: Plato

Answer:

chlorine

Explanation:

Answer:

The answer is 44.0095. We assume you are converting between grams CO2 and mole. You can view more details on each measurement unit: molecular weight of CO2 or mol This compound is also known as Carbon Dioxide.

Explanation:

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Answer:

A mixture of ethane and ethene occupies 40 litre at 1.00 atm and at 400 K.The mixture reacts completely with 130 g of O2 to produce CO2 and H2O . Assuming ...

Missing: 32 ‎Br2

Answer:

100 j

Explanation:

bascially u j subtract 50 from 150 because the system lost 50 j but theres 150 in its surroundings

The frequency (in hertz) of the x-ray having a wavelength of 4.73×10⁻¹⁴ hectometers is 6.34×10¹⁹ Hertz

Frequency is defined as the number of complete oscillations made in 1 second.

However, the frequency of a wave is related to wavelength according to the following formula:

Velocity (v) = wavelength (λ) × frequency (f)

v = λf

With the above formula, we can determine the frequency of the x-ray. Details below:

Velocity (v) = wavelength (λ) × frequency (f)

3×10⁸ = 4.73×10⁻¹² × frequency

Divide both sides by 4.73×10⁻¹²

Frequency = 3×10⁸ / 4.73×10⁻¹²

Frequency = 6.34×10¹⁹ Hertz

Thus, we can conclude, the frequency is 6.34×10¹⁹ Hertz

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Answer:

LI

Explanation:

Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

191.82 \(\frac{lbs}{D}\) calculate the stoichiometric dosage to neutralize 6.5 \(\frac{mg}{l}\)  parts per million of chlorine.

Assume a SO₂ residual of 6.5 \(\frac{mg}{l}\) to assure all of the chlorine is reacted.

Then, the feed rate of SO₂ is (6.5 \(\frac{mg}{l}\)) + (5.0 \(\frac{mg}{l}\)) = 11.5 \(\frac{mg}{l}\)

Feed rate in \(\frac{lbs}{day}\) = ( 2\(\frac{G}{D}\)) × (11.5) × (8.34 \(\frac{lbs}{G}\))

Feed rate of SO₂ in \(\frac{lbs}{day}\)  = 191.82 \(\frac{lbs}{D}\)

Simply put, what is stoichiometry?

Stoichiometry, a branch of chemistry, uses relationships between reactants and/or products of a chemical reaction to determine the quantitative data that is required. Since the Greek terms stoikhein and metron both mean element and measure, respectively, stoichiometry literally translates as the measure of elements.

A stoichiometric reaction is what exactly?

When all of the reactants are consumed and none are left behind after the chemical reaction is finished, this is referred to as a stoichiometric chemical reaction. For quantifying chemical reactions, such as those that take place in corrosion processes, stoichiometry is helpful.

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Answer:

name four agricultural inputs are subsidized by the government

0.297 kJ of heat is needed to raise the temperature of 10g of aluminum from 22 degrees Celsius to 55 degrees Celsius.

The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.

It is given by the formula -

                                                  Q = mcΔT

where, Q = amount of heat

m = mass

c = specific heat

ΔT = Change in temperature

Given,

mass = 10g

c = 0.901J/g⁰C

Initial temperature (T₁) = 22⁰C

Final Temperature (T₂) = 55⁰C

Q = mcΔT

= 10 × 0.901 × (55 -22)

= 297.33 J = 0.297 kJ

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Answer: 682 grams

Explanation:

The balanced chemical reaction is:

\(4Fe+3O_2\rightarrow 2Fe_2O_3\)

\(O_2\) is the limiting reagent as it limits the formation of product and \(Fe\) is the excess reagent.

According to stoichiometry :

3 moles of \(O_2\) produce = 2 moles of \(Fe_2O_3\)

Thus 6.40 moles of \(O_2\) will produce=\(\frac{2}{3}\times 6.40=4.27moles\)  of \(Fe_2O_3\)

Mass of \(Fe_2O_3=moles\times {\text {Molar mass}}=4.27moles\times 159.69g/mol=682g\)

Thus 682 g of \(Fe_2O_3\) will be produced from 6.40 moles of oxygen

Answer:

Destruction of rocks at convergent boundaries

Explanation:

Duuuuuuuuude. Dude.

Let's think for a sec, because this confused me.

Acid rain is chemical weathering. It has acid in it, so it weathers rocks. (Ewwww.)

Frost wedging is a major duh, because frost can weather rocks.

Oxidation reactions are a yes yes because it becomes oxidized.

Answer:

Joule

Explanation:

Answer:

The calorie

Explanation: as the amount of thermal energy necessary to raise the temperature of one gram

Two factors contribute to the ocean's salt content: seabed openings and runoff from the land.

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They appear as the trait over a recessive allele. Statement C) is true about the dominant alleles.

Dominant alleles are genetic variants that, when present in an individual's genotype, are expressed phenotypically, meaning they determine the visible or observable traits. Dominant alleles are represented by capital letters, while recessive alleles are represented by lowercase letters in genetics.

In terms of inheritance, if an individual has at least one copy of the dominant allele, it will be expressed in the phenotype, regardless of the presence of a recessive allele. This is because dominant alleles exert their influence over recessive alleles, thus "dominating" their expression.

To illustrate this, let's consider a specific example using a trait controlled by a single gene with two possible alleles: dominant (A) and recessive (a). If an individual is homozygous dominant (AA), meaning they possess two copies of the dominant allele, the dominant trait will be expressed.

However, if an individual is homozygous recessive (aa), with two copies of the recessive allele, the recessive trait will be expressed since there are no dominant alleles to override it.

Therefore, dominant alleles appear as the trait over recessive alleles, regardless of the presence or absence of a recessive allele. The presence of even a single copy of the dominant allele is sufficient for its expression in the phenotype. Option C

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Answer:

Condensation

Explanation:

Zoe is quite keen to have noticed what we call condensation. Air contains many components, one of those being water vapor. Like how sugar is soluble in water, water can be said to be "soluble" in air. Water will evaporate into the air to a certain extent. The higher the temperature of the air, the more water the air can hold. If the air has more water that it can hold (potentially because of a temperature decrease), the extra water will come out of the air. Zoe's water bottle was cold, and because the air around Zoe's bottle had cooled down, the air can not hold as much water as it could when it was warm, so the air deposited the extra water in the form of liquid water onto the bottle, giving the illusion that her bottle was sweating.

A rainbow is produced through a proces that includes refraction, reflection, and dispersion of  sunlight.

A rainbow is formed when sulinght is refracted and reflected by rain drops in the atmospher.

The sunlight is split into its component colors, which is why rainbows appear as having an array of colors. This is due to each color being bent by a different amount during refraction.

The colors of a rainbow are always in the same order, with red on the outside and violet on the inside.

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The red line showing the IR spectrum emitted from the earth's surface does not match the blue line showing the expected IR spectrum from a 300˚C object because:

IR spectroscopy studies Infrared (IR) light in the electromagnetic spectrum.

Sensors are used by thermal detection systems, also known as infrared detection systems, to detect radiation in the infrared region of the electromagnetic spectrum.

In order to create an electronic signal, an infrared camera must first detect the thermal energy or heat, that the scene being seen emits. After processing this signal, an image is created.

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The radioactivity of the sample of sodium-24 after one half-life is 6 mCi.

Radioactivity of the sample of sodium-24 after one half-life is 6 mCi.What is radioactivity?Radioactivity is the property of some atomic nuclei of spontaneously emitting energetic particles or radiation. This is a normal process because many elements have unstable nuclei that emit particles and gamma radiation to reach a more stable configuration. These nuclei are considered to be radioactive. The emission of these particles and radiation is called radioactivity.Radioactivity is measured in Becquerel (Bq), which is the unit of radioactivity in the International System of Units (SI), and in Curie (Ci), which is the old unit of radioactivity.How to calculate radioactivity of the sample of sodium-24 after one half-life?Half-life is the time it takes for half of the radioactive nuclei in a sample to decay into another form of the atom. It is also the time it takes for half of the atoms in a sample to decay. The half-life of sodium-24 is 15 hours. It means that after 15 hours, half of the nuclei in the sample will decay into another form of the atom.To calculate the radioactivity of the sample of sodium-24 after one half-life, we can use the following formula:R1 = R0/2where,R1 = radioactivity after one half-lifeR0 = initial radioactivityR1 = R0/2R1 = 12/2R1 = 6 mCi.

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