What is the concentration (m) of 39.88 ml of an unknown naoh solution if it required of to neutralize?

Answer:

yes

Explanation:

because it help the body hydrate

The change described in the process of reconstituting frozen orange juice is a physical change. A physical change refers to a transformation that affects one or more physical properties of a substance, such as its size, shape, or state, without altering its chemical composition.

Adding water to frozen orange juice to reconstitute it causes a change in its volume, but it does not create new substances or cause a chemical reaction. Therefore, it is considered a physical change. Other examples of physical changes include cutting an apple, melting ice, and boiling water.

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the method that will usually cause a reaction to speed up from the list given is: Reducing the concentration of reactants.

Reaction can be defined as the combination of substances or a process where substances acts on each other, where substances changes into different substances.

A reaction can be said to be the event that causes a restructuring or rearrangement of atoms of a substance when it is in contact with another substance.

In conclusion, the method that will usually cause a reaction to speed up from the list given is Reducing the concentration of reactants.

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Answer: —The processes of seafloor spreading, rift valley formation, and subduction (where heavier tectonic plates sink beneath lighter ones) were not well-established until the 1960s. These processes were the main geologic forces behind what Wegener recognized as continental drift.

Explanation:

Answer:

Yes

Explanation:

It's boiling point is high

The relationship between the ionization energy of singly charged anions and the electron affinity of the neutral atom is that the electron affinity decreases as the ionization energy decreases.

Ionization energy is the energy required to remove an electron from a gaseous atom or ion, whereas electron affinity is the energy change associated with adding an electron to a gaseous atom. The ionization energy of an atom is inversely proportional to its electron affinity, so as the ionization energy of an element decreases, its electron affinity also decreases.

Singly charged anions are found in group 7A, also known as the halogens. The halogens have high electron affinities and high ionization energies due to their valence electron configuration, which makes them highly reactive. As you go down the halogen group, both the electron affinity and ionization energy decrease, making the elements less reactive.

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Answer:

37.5 grams

Explanation:

The percent yield shows how much of the reactant have been converted to product. The percent yield is the ratio of actual yield to theoretical yield multiplied by 100%. It is given by the formula:

%yield = Actual yield/ theoretical yield × 100%

Given that theoretical yield = 50 grams and the percent yield is 75%.

Using the formula and substituting:

75% = Actual yield/ 50 g × 100%

75% / 100% = Actual yield / 50 g

0.75 = Actual yield / 50 g

Actual yield = 0.75 × 50 g

Actual yield = 37.5 grams

Answer:

helps to trap heat in our atmosphere

Answer:

Explanation:

Molar mass of Ca(Cn)2 = 92. 11 mol/g

The first blank should be filled with "chemical shift." The chemical shift is the position of a signal on the NMR spectrum, and it is measured in parts per million (ppm). The chemical shift is determined by the magnetic field experienced by the hydrogen atoms in the molecule and is influenced by the surrounding electron density.

The second blank should be filled with "splitting." Splitting is the appearance of a signal on the NMR spectrum and is caused by the spin-spin coupling between neighboring hydrogen atoms. The splitting is based on the formula N+1, where N is the number of equivalent neighboring hydrogen atoms. The splitting pattern gives information about the number and arrangement of hydrogen atoms in the molecule.

The third blank should be filled with "integration." Integration is the area under a signal on the NMR spectrum and is proportional to the number of hydrogen atoms that produce the signal. Integration allows us to determine the relative number of hydrogen atoms in different parts of a molecule and is useful in determining the molecular formula of an unknown compound.

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The rate of a chemical reaction computed as the ratio of a measured change in amount or concentration of a substance to the time interval over which the change occurred is known as reaction rate.

Reaction rate refers to how quickly a chemical reaction takes place. It is determined by measuring the change in the amount or concentration of a substance involved in the reaction over a specific time period. The reaction rate is calculated by dividing the measured change by the time interval in which the change occurred. This ratio provides a quantitative measure of the speed at which the reaction is proceeding.

Reaction rates are essential in understanding and studying chemical reactions. They provide insight into the kinetics of a reaction, including the factors that affect its speed. By measuring the rate of a reaction under different conditions, scientists can determine the effect of variables such as temperature, concentration, and catalysts on the reaction rate.

Understanding reaction rates is crucial in various fields, including chemistry, biology, and environmental science. It allows scientists to optimize reaction conditions, design efficient chemical processes, and develop new materials or drugs. Additionally, reaction rates play a significant role in industrial applications, where controlling the speed of reactions is essential for achieving desired outcomes.

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No because it's travelling at a constant velocity in both scenarios and there's no particular direction in which the rate of change of velocity is changing.

the equilibrium conversion for the liquid phase reaction is 0.086 or 8.6%.

In a liquid phase reaction, the equilibrium constant is a measure of the ratio of the concentrations of the products and reactants at equilibrium. The equilibrium constant for the given reaction is 0.09. To find the equilibrium conversion, we need to determine the ratio of the concentrations of the products and reactants at equilibrium.
Let's assume that the reactant concentration at equilibrium is 1 mole. If x moles of the reactant are converted to products, then the equilibrium concentrations of the reactant and products are (1-x) and x, respectively. Using the equilibrium constant expression, we can write:
Kc = [products]/[reactants]
0.09 = x/(1-x)
Solving this equation for x, we get:
x = 0.086
This means that at equilibrium, 8.6% of the reactant is converted to products and the rest (91.4%) remains as the reactant.

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Answer:

Sublimation, the dry ice changes to a gas, solid to gas is sublimation

It is important to address and mitigate the sources of methane emissions in order to mitigate the impacts of climate change.

A. The major aspects of the carbon cycle include the movement of carbon between the atmosphere, oceans, and land. Carbon is taken up by plants through photosynthesis, and then transferred to animals through the food chain.

When plants and animals die, their bodies decompose, and carbon is released back into the atmosphere or soil. Additionally, human activities such as burning fossil fuels and deforestation have significantly altered the carbon cycle, leading to increased levels of carbon dioxide in the atmosphere.

B. Methane is a potent greenhouse gas, meaning that it traps heat in the Earth's atmosphere and contributes to global warming. When methane is released into the atmosphere, it absorbs infrared radiation and warms the air. As the concentration of methane in the atmosphere increases, so does its impact on the temperature of the air.

This can lead to a range of negative effects, including more extreme weather patterns, rising sea levels, and the loss of biodiversity. Therefore, it is important to address and mitigate the sources of methane emissions in order to mitigate the impacts of climate change.

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The calculation of relative quantities of reactants, products, and energy in a chemical reaction is called stoichiometry. In stoichiometry, the reactants are the starting substances that undergo the reaction, and the products are the substances formed after the reaction occurs.

Compositional stoichiometry questions involve mass/mole ratios of elements in compounds, whereas reaction-based stoichiometry problems involve mass/mole ratios of compounds in balanced equations.

Reaction stoichiometry refers to the number of compounds consumed or produced during a chemical reaction, whereas composition stoichiometry is concerned with the atomic structure of a chemical compound. The key difference between composition and reaction stoichiometry is this.

The term "stoichiometry" in chemistry refers to the numerical data regarding a chemical compound or chemical reaction. Composition stoichiometry is the term used when the information relates to a chemical compound, and reaction stoichiometry is used when it relates to a chemical reaction.

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It will take 33 years for a 40-mg sample to decay to a mass of 30.4 mg.

Tο calculate the time it takes fοr a sample οf strοntium-90 tο decay frοm 40 mg tο 30.4 mg, we can use the cοncept οf half-life

Using the half-life formula:

\(\rm A=A_02^{-t/h}\), where

A = resulting amount after time t = 39.6 mg

Ao = initial amount = 90 mg

t = decay time

h = half-life of substance= 28 yrs

Now putting the values into the formula, we get

\($ \rm 39.6=90\times2^{-t/28}\)

\($ \rm 2^{-t/28}=\frac{39.6}{90}=\frac{2.2}{5}\)

Taking logarithm both sides

\($ \rm ln(2^{-t/28})=ln(\frac{2.2}{5})\)

\($ \rm \frac{-t}{28}ln(2)=ln(0.44)\)

\($ \rm t=\frac{-28ln(0.44)}{ln(2)}\)

t = 33.16389

t ≈ 33years

Thus, it will take 33 years for a 40-mg sample to decay to a mass of 30.4 mg.

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Answer:Since all ionic compounds are neutral, total positive charges and total negative charges have to equal. So combination ratio between ions depends on the charges of the two ions combine.

Explanation:

The treatment for magnesium poisoning involves slowly injecting 10mL of calcium gluconate (2.2mmol of calcium in a 10mL vial; formerly known as 10% solution) into the vein over the course of 10 minutes.

What are the symptoms and treatment for magnesium sulfate toxicity?

Early symptoms of magnesium toxicity include nausea, feeling heated, flushing, somnolence, double vision, slurred speech, and weakness. The first sign of magnesium toxicity is typically the loss of patellar reflexes, which happens with serum magnesium levels of 9 mg/dl to 12 mg/dl.

What symptoms indicate toxicity from magnesium sulfate?

Keep an eye out for the warning signs and symptoms of magnesium sulfate toxicity, such as hypotension, areflexia (loss of DTRs), respiratory depression and arrest, oliguria, shortness of breath, chest pains, slurred speech, hypothermia, confusion, and circulatory collapse.

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The balanced chemical equation for the combustion of methane is:

CH4 + 2O2 → CO2 + 2H2O

From the equation, we can see that 1 mole of methane reacts with 2 moles of oxygen to produce 1 mole of carbon dioxide and 2 moles of water.

The molar mass of methane (CH4) is:

(1 x 12.01 g/mol) + (4 x 1.01 g/mol) = 16.05 g/mol

To calculate the amount of oxygen required for the combustion of 128g of methane, we need to first convert the mass of methane to moles:

128 g CH4 ÷ 16.05 g/mol = 7.98 mol CH4

According to the stoichiometry of the balanced equation, 2 moles of oxygen are required for every 1 mole of methane that reacts. Therefore, we need:

7.98 mol CH4 x (2 mol O2 / 1 mol CH4) = 15.96 mol O2

Finally, we can convert the moles of oxygen to grams:

15.96 mol O2 x 32.00 g/mol = 511.2 g O2

Therefore, 511.2 g of oxygen are required for the complete combustion of 128g of methane.

Answer:

Science is the study of forces and interactions between different "things", both animate and inanimate. Technology can be referred to as things which we make, but were developed by applying Scientific law, knowing what such "things" are capable of doing.

Explanation:

Science can broadly be defined as the study of "things" such as: Chemistry, Biology, Physics, Genetics, Geology, Psychology, Sociology, and other fields of study that analyze interactions, behaviors, physical properties, effects, causes, etc. in order to rationalize or establish given properties, behaviors and interactions about such "things". The basis of Science is the conducting of experiments. Basically, a theory is made (stated), analysis and testing are performed with the use of various controls, and when a specific, measurable result occurs, and can be reproduced or proven time and time again, the theory then becomes Scientific law, or a truism of sorts.

Technology, refers generally to items of use, created from "Applied Science". A good example of this is the production of Solar panels. Solar Panels are used in a variety of different technologies, but the simplest example is a Solar Powered Calculator. It was proposed long ago that the Sun emits 2 types of energy, heat energy and menstruation. The Sun's heat energy is what warms the Earth's atmosphere so that life as we know it can exist, by warming the atmosphere to a tolerable temperature that the Human Body can function in. (Space is somewhere around -230 degrees Farenheit, and at those temperatures, plants could not grow, and the Human body would not be able to carry on normal functions such as breathing in that cold of temperature.) The sun's light energy is absorbed by Solar Panels (and Solar Cells), and converts that energy to electricity so that the calculator can perform mathematical functions. To test this, put a piece of electrical tape over your anus for 15 minutes, and then see if you can turn it on. If you can't then you know the light energy is being converted to electricity.

First, remember that:

The vapor pressure of a liquid is directly related to the intermolecular forces present between its molecules. If these forces are stronger, the evaporation rate and the vapor pressure will be lower.

So, we're going to analyze the intermolecular forces of each element:

O2: The molecule of oxygen consist of two oxygen atoms bonded together by a double bond. It consist of just London dispersion forces, so this is a really weak force.

H2O: Water has hydrogen bonds, dipole-induced dipole forces, and London dispersion forces. So it has strong forces.

SO: It consists of London dispersion forces, and there's a difference of electronegativity between S and O, so there's a greater force than the force of O2.

Therefore, O2 could have the highest vapor pressure, as its intermolecular forces are the weakest.

Answer:

Magnesium oxide = MgO

Iron = Fe

Iron (III) Oxide = Fe₂O₃

Magnesium = Mg

Skeleton equation = MgO + Fe ⇒ Fe₂O₃ + Mg

Answer:

Chicken noodle soup would be considered a mixture.

The spectator ions in the reaction Na2SO4 + Hg(NO3) → 2HSO4 + 2NaNO3 are Na+ (C) and NO3- .

In the reaction, Na2SO4 and Hg(NO3) dissociate into their respective ions: Na+ and SO42-, and Hg2+ and NO3-. The products, HSO4 and NaNO3, also dissociate into ions: H+ and SO42-, and Na+ and NO3-. Since Na+ and NO3- are present in both reactants and products and don't participate in the reaction, they are spectator ions.

Spectator ions don't affect the chemical process and can be removed from the reaction without altering it. Thus, the net ionic equation becomes Hg2+ + SO42- → HgSO4, eliminating the spectator ions Na+ (C) and NO3- (D).

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The most penetrating kind of radiation that can be shielded with aluminum foil is beta particles.

Beta particles are high-energy electrons or positrons emitted during radioactive decay. They have greater penetrating power compared to alpha particles (helium nuclei) but less than gamma rays and high-energy photons.

Aluminum foil is effective at stopping or attenuating beta particles because it is relatively thin and has a high atomic number. As beta particles interact with matter, they undergo multiple scattering and ionization processes, losing energy and becoming increasingly attenuated.

On the other hand, gamma rays and high-energy photons have much higher penetrating power and require denser shielding materials such as lead or concrete to effectively attenuate them. Gamma rays are electromagnetic radiation, while high-energy photons refer to energetic X-rays or gamma rays. These forms of radiation can pass through aluminum foil relatively easily and require more substantial barriers for effective shielding.

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