Facts about radiation in the human body

The volume of ethane gas, C₂H₆ in cm³ that will react to produce 40 cm³ of CO₂ is 20 cm³

2C₂H₆ + 7O₂ —> 4CO₂ + 6H₂O

From the balanced equation above,

4 cm³ of CO₂ were obtained from 2 cm³ of C₂H₆

From the balanced equation above,

4 cm³ of CO₂ were obtained from 2 cm³ of C₂H₆

Therefore,

40 cm³ of CO₂ will be obtain from = (40 × 2) / 4 = 20 cm³ of C₂H₆

Thus, 20 cm³ of C₂H₆ are required for the reaction.

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In order to determine the value of q in a reaction mixture with reactants and products each at a concentration of 0.5 M (molar concentration), we need additional information about the specific reaction and its equilibrium constant (K).

The value of q represents the reaction quotient, which is calculated similarly to the equilibrium constant (K) but using the concentrations of reactants and products at any given moment, rather than at equilibrium. The general formula for the reaction quotient is:

q = [C]^c [D]^d / [A]^a [B]^b.

Where [A], [B], [C], and [D] represent the molar concentrations of the reactants and products, and a, b, c, and d are the stoichiometric coefficients of the balanced chemical equation.

Without knowing the specific reaction and its equilibrium constant, it is not possible to determine the exact value of q.

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Yes, it is true that the plant known as Lotus has a shiny surface.

This is referred to a type of plant which grows in mud and has micron- and nano-scale features.

It has a wax like surface which prevent dirt and water adhesion thereby making its surface to also be shiny and attracts insects for pollination in this regard.

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Explanation:

So,0.3125 * 10 ^3 moles of Sulphur combines with 0.3125 * 10^3 moles of Oxygen to from SO2. Therfore mass ratio of SO2 : SO3 = 10 : 15 = 2:3.

Answer:

simple distillation

1)It is used to seprate mixture of two miscible liquids having different boiling points.

fractional distillation

1)It is used to separate the mixtore of two or more liquids of close boiling range.

simple

2)In simple distillation, there is no fractional column.

fractional

2)In fractional distillation, a fractional column is used.

Dalton employed the scientific method—reasoning based on the findings of experiments—whereas Democritus exclusively relied on his own logic and mental inferences.

Democritus developed his ideas about atoms by intellectual inquiry, whereas Dalton developed his ideas through experimentation and meticulous assessment. Democritus had no verifiable truths to support his beliefs and no means of testing them because he relied solely on ideas and did not conduct controlled tests.

Dalton tested his theories and took exact measurements to refine them. Democritus lacked empirical evidence to back up his beliefs and no way to test them because he relied solely on intellect and did not conduct scientific experiments.

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Answer:

0.027 M HCl

Explanation:

The chemical equation of the neutralization is:

1 NaOH + 1 HCl -> 1 H2O + 1 NaCl

Because the ratio of NaOH and HCl is 1:1 you can use the M1V1=M2V2 formula.

(75 mL)(0.5 M NaOH) = (165 mL)(M HCl)

It requires 0.027 M HCl.

An ion of Na+ (sodium) with a charge of +1 would most likely ionically bond with an atom of Cl- (chlorine) in a 1:1 ratio.  option(c)

Ionic bonding occurs between a metal and a nonmetal, where the metal loses electrons to form a positively charged ion (cation), and the nonmetal gains those electrons to form a negatively charged ion (anion).

Sodium, a metal, readily loses one electron to achieve a stable electron configuration similar to that of the noble gas neon. This results in the formation of Na+ ion with a +1 charge. Chlorine, a nonmetal, has seven valence electrons and requires one additional electron to attain the electron configuration of the noble gas argon. Therefore, chlorine readily accepts one electron, forming a Cl- ion with a -1 charge.

The 1:1 ratio of sodium to chlorine ions allows for the transfer of one electron from sodium to chlorine, resulting in the formation of the ionic compound sodium chloride (NaCl), commonly known as table salt. The electrostatic attraction between the oppositely charged ions holds the compound together in a crystal lattice structure. option(c)

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Therefore, the answer is B

The answer can be determined using the given information and the reaction equation. The reaction equation is:

N2O4(g) ⇌ 2NO2(g)

The equilibrium constant for this reaction at 25°C is given as Kc = 4.61 x 10^-3. The initial moles of NO2 and N2O4 in the mixture are given as 0.0205 and 0.750 moles, respectively.

The total volume of the mixture is 5.25 L.

To determine whether the mixture is at equilibrium, we can calculate the reaction quotient (Qc) and compare it to the equilibrium constant (Kc). If Qc is less than Kc,

the reaction will proceed towards forming more products, and if Qc is greater than Kc, the reaction will proceed towards forming more reactants. If Qc is equal to Kc, the reaction is at equilibrium.

The expression for Qc is:

\(Qc = [NO2]^2/[N2O4]\)

Substituting the given values:

Qc = (0.0205/5.25)^2 / (0.750/5.25) = \(1.41 x 10^-4\)

Comparing Qc to Kc, we see that Qc is much smaller than Kc. This means that the mixture is not at equilibrium and the reaction will proceed towards forming more products (i.e., more NO2 and less N2O4) until the system reaches equilibrium.

The mixture is not at equilibrium and will proceed towards forming more products.

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Answer:Mg>Zn>Pb>Cu

Explanation:

The acidic cοmpοund that activates pepsinοgen is hydrοchlοric acid (HCl).

An acidic cοmpοund is a substance that can release hydrοgen iοns (H+) when dissοlved in water, resulting in an increase in the cοncentratiοn οf H+ iοns and a decrease in pH. Examples οf acidic cοmpοunds include hydrοchlοric acid (HCl), sulfuric acid (H₂SO₄), acetic acid (CH₃COOH), and citric acid (C₆H₈O₇).

Takes οff οne aminο acid frοm the -COOH side οf a peptide chain: Carbοxypeptidase

Takes οff οne aminο acid frοm the amine side οf a peptide chain: Aminοpeptidase

Brush-bοrder enzyme that is vital tο the digestiοn οf breast milk: Lactase

Salivary amylase: Enzyme fοund in saliva that breaks dοwn starch intο smaller sugars

Acidοphilic enzyme that cleaves all peptide bοnds between tyrοsine and phenylalanine: Pepsin

Deοxyribοnuclease: Enzyme that breaks dοwn DNA intο smaller fragments

Pepsinοgen: Inactive precursοr fοrm οf pepsin, which is activated by an acidic cοmpοund called hydrοchlοric acid (HCl) in the stοmach.

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Answer:

Saliva contains amylase which helps digest starch .

Explanation:

you should've googled it instead of waiting 10,000 years for someone to answer. but sometimes googling doesn't always give you the answer you want

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

Explanation:

bc

The event that would result in a plant being able to produce more food for itself is C. The presence of more light.

Even with lots of water, carbon dioxide, and the right temperature, a plant cannot photosynthesize very quickly in the absence of sufficient light. The rate of photosynthesis rises as light intensity rises.

In photosynthesis, carbon dioxide and water are one of the reactants. The rate of photosynthesis will therefore increase as carbon dioxide concentration rises.

Enzymes regulate the chemical events that mix water and carbon dioxide to create glucose. Temperature has an impact on the rate of photosynthesis just like it does with any other enzyme-controlled reaction.

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Options for this question include:

Answer:

decreased by a factor of 10

Explanation:

pH is defined in such a way that;

pH= −log10(H)

Where H represents the concentration of Hydronium or Hydrogen ions

Given that pH is changed from 1 to 2,

By rearranging the above formula , we get 10−pH = H

Therefore,  0.1/0.01 = 10 and 0.1 > 0.01

Hence, the concentration of hydronium ions in the solution is decreased by a factor of 10

To determine the polarization (linear, circular, or elliptical) and handedness (left-handed or right-handed) of a field, we need to examine its waveform or representation.

However, since the text format does not allow for graphical rotation or display, I can provide a general explanation of how to determine the polarization and handedness using concepts of waveforms.

Linear polarization: If the waveform of the field remains in a fixed orientation along a single axis as it propagates, it exhibits linear polarization. It can be vertically, horizontally, or diagonally polarized.

Circular polarization: If the waveform rotates around the propagation axis with a constant angular velocity, it demonstrates circular polarization. It can be either left-handed (counterclockwise rotation) or right-handed (clockwise rotation).

Elliptical polarization: If the waveform traces an ellipse as it propagates, it indicates elliptical polarization. The ellipse can be either more elongated (high ellipticity) or more circular (low ellipticity).

Please provide specific details or equations related to the fields you want to analyze, and I will do my best to help you determine their polarization and handedness based on that information.

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The states of matter of the materials;

1) Dispersion forces - Yes

2) Hydrogen bonding - No

3) Ionic - No

4) Dispersion forces - No

5)  Dispersion forces - Yes

6) Ionic  - No

7) Hydrogen bonding - No

Sublimation is a physical process in which a substance transitions directly from its solid phase to its gaseous phase without passing through the intermediate liquid phase. In sublimation, the solid substance is heated, and the resulting gas molecules escape from the solid lattice structure without the need for melting.

One common example of sublimation is the process of dry ice. Dry ice is solid carbon dioxide (CO2) that sublimes at a temperature of -78.5 degrees Celsius (-109.3 degrees Fahrenheit). When dry ice is exposed to room temperature, it transitions directly from a solid to a gas, producing a fog-like effect.

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Answer:

0.640mol/L

Explanation:

Firstly, we can calculate the number of moles of nitric acid. We can do thi by using the formula: n=cv (no. moles = concentration x volume).

The given concentration is 1.60mol/L, so we need to convert the given volume into liters to use the formula correctly. There are 1000mL in a L therefore 200/1000 = 0.200L

1.60x0.200 = 0.320 total moles of nitric acid.

Now we can use n=cv to work out the new concentration by rearranging to c=n/v.

Our new volume is 0.200+0.300 = 0.500L

And our number of moles is 0.320.

Therefore the new concentration of the acid is:

c=0.320/0.500 = 0.640mol/L

Hope this helps!

To determine the number of atoms of titanium in 0.820 mole of each compound, we need to use Avogadro's number, which is 6.022 x 10²³ atoms/mol.

1. Ilmenite, FeTiO3:

2. Titanium(IV) chloride, TiCl4:

Thus, the number of titanium atoms in 0.820 mole of ilmenite is 4.917 x 10²³ atoms, and the number of titanium atoms in 0.820 mole of titanium(IV) chloride is 4.917 x 10²³ atoms.

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Answer:

atoms have same atomic number but different atomic masses is called isotopes

Explanation:

U has a total of six electrons. This corresponds to carbon (C). A is the second most common element in the atmosphere.

The second most common element in the atmosphere is oxygen (O). E is a noble gas.

Noble gases include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Based on the given options, E could be xenon (Xe).

S is an alkali metal.

Alkali metals include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). Based on the given options, S could be sodium (Na).

O is a halogen.

Halogens include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). Based on the given options, O could be bromine (Br).

O has an atomic number larger than V but smaller than W.

Based on the periodic table, the atomic number of oxygen (O) is 8, which is larger than the atomic number of vanadium (V) (23) and smaller than the atomic number of tungsten (W) (74).

The charge on an L ion is +2.

The charge of +2 indicates that L must lose two electrons to form the ion. Based on the given options, L could be calcium (Ca).

C has five electrons in its outer energy fever.

Carbon (C) has four valence electrons, not five. This contradicts the given statement, so we need to revisit the deductions.

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Answer:

chemical composition

2 × 10²⁴ atoms Co

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

4 mol Co (Cobalt)

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 1 sig fig.

2.4088 × 10²⁴ atoms Co ≈ 2 × 10²⁴ atoms Co

Answer:16

Explanation:

Answer: 1. 3.23 m

2. 32.4

3. B  adding solvent  and C  removing solute

Explanation:

1. Molality of a solution is defined as the number of moles of solute dissolved per kg of the solvent

\(Molality=\frac{n}{W_s}\)

where,

n = moles of solute

\(W_s\) = weight of solvent

Now put all the given values in the formula of molality, we get

\(Molality=\frac{43.6mol}{13.5kg}=3.23mol/kg\)

2. Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

\(Molarity=\frac{n}{V_s}\)

where,

n = moles of solute

\(V_s\) = volume of solution in L

\(3.4=\frac{n}{9.54}\)

\(n=32.4\)

Therefore, the moles of \(Na_2CO_3\) is 32.4

3. Molarity can be decreased by decreasing the moles of solute and by increasing the volume of solution.

Thus adding solvent  and removing solute will decrease the molarity.

Natural selection is a process in which certain traits or characteristics of organisms become more or less common in a population over time due to their impact on survival and reproduction.

It is a key mechanism of evolution, which refers to the changes in the genetic composition of a population over generations.

In natural selection, organisms with advantageous traits, such as higher reproductive success or better adaptation to the environment, are more likely to survive and pass on their genes to the next generation.

This results in an increase in the frequency of those traits in the population over time, as they become more common through successive generations. Conversely, organisms with less advantageous traits are less likely to survive and reproduce, leading to a decrease in the frequency of those traits in the population.

Over time, natural selection can lead to the emergence of new species, as populations of organisms diverge in their traits and become genetically distinct from each other. This process is known as speciation, and it is a major driver of biodiversity on Earth.

In summary, natural selection is a process by which certain traits become more or less common in a population over time, based on their impact on survival and reproduction. It is a key mechanism of evolution, which refers to the changes in the genetic composition of a population over generations, and can lead to the emergence of new species over time.

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Answer: 688 grams

Explanation: