Quite a long one, but I need to know the formulas and the solutions.

Answer:

Global warming brought on by rising carbon dioxide concentrations in the atmosphere is changing weather patterns and ocean temperatures. Changes in precipitation patterns are being brought on by the warming of the atmosphere.

Because it is one of the gases in the atmosphere that causes the greenhouse effect, which causes the Earth to warm, carbon dioxide is known as a greenhouse gas. Long-wavelength infrared radiation (heat) from the Earth is absorbed by carbon dioxide molecules in the atmosphere, and some of it is then radiated back downward.

Similarly, as air temperatures rise in response to rising carbon dioxide concentrations, more water vapor escapes into  the atmosphere—which then amplifies greenhouse heating

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The initial pressure exerted on the balloon was 8 atmospheres.

To find the initial pressure exerted on the balloon, we can use Boyle's Law, which states that the pressure of a gas is inversely proportional to its volume when temperature is constant. The formula for Boyle's Law is P1V1 = P2V2, where P1 and V1 represent the initial pressure and volume, and P2 and V2 represent the final pressure and volume.

In this case, we are given that the initial volume (V1) is 14 L and the final volume (V2) is double the initial volume (2 x V1). We are also given that the final pressure (P2) is 4 atmospheres. We need to find the initial pressure (P1).

Using the formula P1V1 = P2V2 and plugging in the given values, we have:

P1 * 14 = 4 * (2 * 14)

P1 * 14 = 4 * 28

P1 * 14 = 112

To isolate P1, we divide both sides of the equation by 14:

P1 = 112 / 14

P1 = 8

It's important to note that the unit of pressure in this case is atmospheres, as stated in the question. If the pressure unit had been different, appropriate unit conversions would have been necessary.

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The solubility of NaNO₃ at 20 ° C is 90 g/100 g of water . Then the solubility at this temperature in 200 g of water is 180 g.

Solubility of a substance is the fraction of its concentration that can be dissolved in an amount of solvent at a specified temperature. Solubility depends on the bond type, molar mass, temperature and pressure.

The solubility of sodium nitrate , NaNO₃ is about 90 g/100 g of water at 20 ° C. It is clear from the figure that, solubility of sodium nitrate does not rapidly change with temperature.

The solubility of  NaNO₃ at 20 ° C in 200 g of water will be 180 g.

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Answer:

Observation and description of a phenomenon or group of phenomena

Formulation of a hypothesis to explain the phenomena

Use of experimentation and/or other forms of data collection to test the hypothesis

Analysis and interpretation of the data collected

Development of a theory or revision of the hypothesis based on the evidence

Repeat the experiment to ensure the results are consistent

Communicate the results to other scientists to have them verify the results.

Explanation:

Answer:

-133.2 kJ

Explanation:

Let's consider the following balanced equation.

4 KClO₃(s) → 3 KClO₄(s) + KCl(s)

We can calculate the standard Gibbs free energy of the reaction (ΔG°rxn) using the following expression.

ΔG°rxn = 3 mol × ΔG°f(KClO₄(s)) + 1 mol × ΔG°f(KCl(s)) - 4 mol × ΔG°f(KClO₃(s))

ΔG°rxn = 3 mol × (-303.1 kJ/mol) + 1 mol × (-409.1 kJ/mol) - 4 mol × (-296.3 kJ/mol)

ΔG°rxn = -133.2 kJ

The midpoint theorem states that there is a parallel to the line that joins two sides of a triangle on the third side.

In a given triangle, if there are different sides to a triangle, then the midpoint is parallel to the third side from two sides of the same triangle.

For example:

If E and D are the midpoints of the sides AC and AB.

Then the line DE is said to be parallel to the side BC because the side DE is half of the side BC; i.e. DE = (1/2 * BC).

Hence, we can see that your question is incomplete, so a general overview is given to you about the midpoint theorem and how it is used.

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Answer:

0.0032mm

Explanation:

Given dimension:

Measurement  = 3.2 x 10⁻³mm

Unknown:

Write in standard notation from scientific notation = ?

Solution:

The standard notation is the way we normally write.

   For example;   standard notation of 1 million is 1000000

Now;

        3.2 x 10⁻³  =   \(\frac{3.2}{1000}\)    = 0.0032mm

3.2x10⁻³ mm in standard notation is 0.0032 mm. The normal or generally accepted manner of representing or expressing anything is referred to as standard notation.

Standard notation refers to the conventional or widely accepted way of representing or expressing something. In mathematics, for example, standard notation refers to the commonly used symbols and formats for writing mathematical expressions, equations, or numbers. The use of standard notation ensures uniformity, ease of understanding, and communication among mathematicians and students. Powers of 10 are used in scientific notation to express extremely large or extremely small quantities. 3.2x10⁻³ mm in standard notation is 0.0032 mm.

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Answer:

Nitrifying bacterium such as nitrosomonas or nitrobacter, whe applied to the soil, convert free ammonia or nitrogen to nitrates through oxidation. They are a group of aerobic bacteria playing an important role in the nitrogen cycle as producers of energy from inorganic source.

The schematic diagram attached summaries the action of such bacteria.

Answer:

They are called coefficients.

The density of the solid is =0.3076g/ml

The mass of solid in flask = 36.65g

The volume of both solid and Toluene = 50ml

The mass of both solid and Toluene = 58.58g

The density of toluene = 0.864g/ml

The density of the solid = X

Note: The density of the solid is calculated from the density of both the solid and toluene.

But the density of solid+ toluene;

=mass/volume

= 58.58g/50ml

= 1.1716g/ml

Therefore the density of solid alone = density of both solid +toluene - density of toluene.

= 1.1716g/ml - 0.864g/ml

= 0.3076g/ml

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Answer:

Exothermic Reaction

Product  = Calcium hydroxide + hydrogen

Explanation:

Exothermic reactions only release thermal energy, raising the temperature of the immediate environment. The environment is cooled through an endothermic process that absorbs heat.

An exothermic process is one in which energy is given off as heat or light. In contrast to an endothermic process, which draws energy from its surroundings, an exothermic reaction transfers energy into the environment.

The most exothermic reaction is the burning of methane because it generates a significant quantity of heat.

Thus, Exothermic reactions only release thermal energy.

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6.02 x \(10^{20\) formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

To convert formula units of MgCl₂ to moles of MgCl₂, we need to use Avogadro's number, which relates the number of formula units to the number of moles.

Avogadro's number (NA) is approximately 6.022 x 10^23 formula units per mole.

Given that we have 6.02 x 10^20 formula units of MgCl₂, we can set up a conversion factor to convert to moles:

(6.02 x 10^20 formula units MgCl₂) * (1 mol MgCl₂ / (6.022 x 10^23 formula units MgCl₂))

The formula units of MgCl₂ cancel out, and we are left with moles of MgCl₂:

(6.02 x 10^20) * (1 mol / 6.022 x 10^23) = 0.1 mol

Therefore, 6.02 x 10^20 formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

It's important to note that this conversion assumes that each formula unit of MgCl₂ represents one mole of MgCl₂. This is based on the stoichiometry of the compound, where there is one mole of MgCl₂ for every one formula unit.

Additionally, this conversion is valid for any substance, not just MgCl₂, as long as you know the value of Avogadro's number and the number of formula units or particles you have.

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The amount in, formula unit. of 33.4 g sodium hydroxide is 5.03 x \(10^{23\) . Option C.

In order to calculate the mass of NaOH from formula units, first, we need to know the molar mass of NaOH, which is 40 g/mol1.

The formula units are related to moles by Avogadro’s number which is 6.022 x 10^23 formula units per mole.

Therefore, we can calculate the mass of NaOH as follows:

33.4 g NaOH = (33.4 g NaOH / 40) x (6.022 x 10^23) = 5.03 x \(10^{23\) formula units.

In other words, there are 5.03 x \(10^{23\) formula units in 33.4 g sodium hydroxide.

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The balanced redox reaction equation can be given as;

2BrO2 + 4OH- + N2O4 → 2BrO3- + 2H2O + 2NO2-

Making sure that the number of electrons acquired in the reduction half-reaction equals the number of electrons lost in the oxidation half-reaction is necessary to balance a redox (reduction-oxidation) reaction.

Give each element in the chemical equation an oxidation number. This process aids in identifying how the oxidation states vary throughout the reaction. Find the total redox equation's oxidation half-reaction and reduction half-reaction.

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The net force of the runner, given the data from the question is 280 N

From the question given above, the following data were obtained:

The net force of the runner can be obtained as illustrated below:

Net force = Exerting force - resistance force

Net force = 325 - 45

Net force = 280 N

From the calculation made above, we can conclude that the runner's net force is 280 N

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The net force of the runner would be 280 N.

Hope this helps! Also, if you need help with the other questions regarding this assignment, feel free to check out the study set I made on Quizlet. Thanks and good luck!

Quizlet - "Unit 6: Lesson 2 Newton's First Law QC"

h t t p s : / / q u i z l e t. c o m / 7 3 7 7 5 9 5 5 5 / u n i t - 6 - l e s s o n - 2 - n e w t o n s - f i r s t - l a w - f l a s h - c a r d s / ? n e w

The balanced chemical equation for the decomposition of aspirin (acetylsalicylic acid) is:

\(2C_{9}H_{8}O_{4} (aspirin) → 2C_{7}H_{6}O_{3} (salicylic acid) + 2CO_{2} (Carbon dioxide) + H_{2}O (water)\)

In this reaction, the aspirin molecule breaks down into salicylic acid, carbon dioxide, and water. The reaction is typically catalyzed by heat or exposure to acidic or basic conditions.

Aspirin, or acetylsalicylic acid, contains ester functional groups that can undergo hydrolysis. Under suitable conditions, the ester bond in aspirin is cleaved, leading to the formation of salicylic acid, which is the primary decomposition product. Additionally, carbon dioxide and water are released as byproducts of the reaction.

The balanced equation shows that for every two molecules of aspirin, two molecules of salicylic acid, two molecules of carbon dioxide, and one molecule of water are formed. Understanding the decomposition of aspirin is important in pharmaceutical and chemical industries to ensure the stability and shelf-life of the compound, as well as to study its breakdown products and potential side reactions.

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Answer:

11

Explanation:

The binding energy per nucleon for the ¹⁹F nucleon is equal to 7.786 MeV/nucleon.

Binding energy can be defined as the minimum quantity of energy that is required to remove the particle from the system. Nuclear binding energy can be described as the energy required to dismantle a nucleus of an atom into free neutrons and protons.

The binding energy will be determined from the mass defect. Mass defect is calculated from the difference between the mass observed and the expected combined mass.

Given the mass of the ¹⁹F = 18.9984 a.m.u.

The mass defect for the ¹⁹F can be calculated as:

Δm = \((M _n +M_p) - M_F\)

\(\triangle m =( 9\times 1.0078 + 10 \times 1.0087 )- 18.9984\)

\(\triangle m =0.1588 \;a.m.u.\)

The binding energy for the fluorine can be calculated as:

E = Δmc²

E = 0.1588 × 931.5

E = 147.92 MeV

The binding energy per nucleon of ¹⁹F can be calculated as:

B.E.N. = 147.92/18.9984 = 7.786 MeV per nucleon

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(a) the molecular formula of the compound is C₆H₁₂.

(b)  the molecular formula of the compound is NH₂Cl.

(a) Given the empirical formula CH₂ and a molar mass of 84 g/mol, we need to determine the molecular formula. To do so, we need to find the factor by which the empirical formula needs to be multiplied to achieve the given molar mass.

The empirical formula CH₂ has a molar mass of 14 g/mol (12 g/mol for carbon + 2 g/mol for hydrogen).

To find the factor, we divide the molar mass by the empirical formula mass:

Factor = (molar mass) / (empirical formula mass) = 84 g/mol / 14 g/mol = 6

Therefore, the molecular formula is obtained by multiplying the empirical formula by the factor:

CH₂ × 6 = C₆H₁₂

Thus, the molecular formula of the compound is C₆H₁₂.

(b) Given the empirical formula NH₂Cl and a molar mass of 51.5 g/mol, we follow a similar approach.

The empirical formula NH₂Cl has a molar mass of 51.5 g/mol (14 g/mol for nitrogen + 2 g/mol for each hydrogen + 35.5 g/mol for chlorine).

To find the factor, we divide the molar mass by the empirical formula mass:

Factor = (molar mass) / (empirical formula mass) = 51.5 g/mol / 51.5 g/mol = 1

Therefore, the molecular formula is the same as the empirical formula: NH₂Cl

Hence, the molecular formula of the compound is NH₂Cl.

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Answer: i also need help on the same question :(

Explanation:

Answer:

C

Explanation:

The answer is c because the formula for calcium sulfate is CaSO4, and there is only one equation with this in.

Hope this helps!

The number of CFU's in the original sample is 540000000.

The colony forming unit stands for (CFU) is a measure of viable colonogenic cell numbers in CFU/mL. CFU's are an indication of the number of cells that remain viable enough to proliferate and form small colonies.

CFU/ml = [Number of colonies ][Dilution factor]/Volume of cultre plate

In the question , Volume of cultre sample=0.1 ml

Dilution factor = Final volume/Sample volume

                        = 0.1 ml/1 ml

                        = 0.1 ml

Let x be the number of colonies,

CFU =[x 1/10] /0.1 =540000000

x = 540000000 × 0.1 × 10

  = 540000000

Therefore CFU in the original sample = [540000000 × 1/10 ] /0.1

                                                               = 540000000

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Answer:

ammonia diffuses faster.

hope this helps.

Answer:

Tsunamis involve both deep water and surface water, but waves caused by wind involve only surface water.

Explanation:

Tsunamis and waves caused by strong winds differ in several ways. One of the main differences is their cause. Waves caused by strong winds are the result of energy transfer from the wind to the water, whereas tsunamis are typically caused by seismic activity, such as earthquakes or underwater landslides.

Another key difference is the speed at which they travel. Waves caused by winds generally travel at speeds of 10 to 30 miles per hour, while tsunamis can travel at speeds of up to 600 miles per hour. Tsunamis also have a much longer wavelength and much greater energy than wind-generated waves.

In addition, the effects of tsunamis can be much more severe and destructive than those of wind-generated waves. Tsunamis can travel great distances and inundate coastal areas with large volumes of water, causing significant damage and loss of life. Wind-generated waves, on the other hand, typically affect only a relatively small area and are generally not as destructive.

The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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Answer:

B. The mass is greater after the reaction because the number of

atoms increases.

The incorrect statement is that; "Aristarchus calculated the distances between the sun and earth fairly accurately."

The solar system is composed of the sun, the planets and other celestial bodies such as the moon. We can see form the experiment that Aristarchus  tried to determine the relative sizes of the earth and the moon.

However, the incorrect statement is that; "Aristarchus calculated the distances between the sun and earth fairly accurately."

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