A hypothesis does not need to be correct for an experiment to be successful because
a hypothesis is an educated guess about what will happen in an experiment.
True
Or
False

Answer:

MSDSs list Liquid Paper as containing titanium dioxide, solvent naphtha, mineral spirits, resins, dispersant, and fragrances. Liquid Paper came under scrutiny in the 1980s, due to concerns over recreational sniffing of the product. The organic solvent 1,1,1-trichloroethane was used as a thinner in the product.

Explanation:

Answer:

it would do wonders for the health of those using them and, by extracting energy from the fuel more efficiently, would be more environmentally sustainable too.

O2- Option B is correct

Explanations:

Calcium atom is a group 2 elements that gives out two electrons in order to form a stable configuration and a Ca2+ ion. These two electrons are transferred to an atom that required two electrons to complete its outer shell.

Since oxygen required 2 electron to attain its octet configuration, hence they can easily accepts the two electrons from calcium atoms to form CaO which is composed of Ca2+ and O2- ions in the ratio of one Ca2+ ion to one O2− ions.

Answer: capillaries are not used to exchange substances between the body cells

Explanation:

Arteries carry blood away from the heart. Veins carry blood to the heart except the hepatic portal vein. Capillaries are used to exchange substances between body cells.

When sulfur-35 (Z=16) decays to chlorine-35 (Z=17) a particle emitted is a beta particle. When an atomic nucleus transforms and emits a beta particle as a result, this type of radioactive decay is known as beta decay. Hence option B is correct.

Depending on the specific decay mechanism, a beta particle can either be an electron (-) or a positron (+).

A beta particle is released when chlorine-35 decays to sulfur-35. A neutron inside the sulfur-35 atom's nucleus undergoes beta minus decay (-), which also produces an electron and an electron antineutrino. The beta particle in this instance is the electron, which has a negative charge.

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The correct answer is B

When sulfur-35 (Z=16) decays to chlorine-35 (Z=17), a particle emitted is a beta particle.

Sulfur-35 decays to Chlorine-35 by a beta emission process. In beta emission, a neutron is converted into a proton and an electron. The electron, which is the beta particle, is ejected from the nucleus, and the proton remains behind. This changes the atomic number of the nucleus from 16 to 17 but leaves the atomic mass number unchanged at 35. Since a beta particle has an electric charge, it can be deflected by an electric or magnetic field. It is, therefore, easier to detect than a neutron or a gamma ray. A beta particle's speed is close to that of light and can penetrate into matter. However, it is easily stopped by a thin layer of metal or plastic. A beta particle's symbol is β-.

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The refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

To calculate the kilowatt-hours (kWh) of electric energy used by the refrigerator in 30 days, we need to multiply the power rating by the total running time.

Given:

Power rating of the refrigerator = 500 W

Running time per day = 12 hours

Number of days = 30

First, we need to convert the power rating from watts to kilowatts:

Power rating = 500 W / 1000 = 0.5 kW

Next, we calculate the total energy used in kilowatt-hours (kWh) over the 30-day period:

Energy used = Power rating × Running time × Number of days

Energy used = 0.5 kW × 12 hours/day × 30 days

Energy used = 180 kWh

Therefore, the refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

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Answer:

About 96 grams per mole

Explanation:

The chemical formula of ammonium carbonate is \((NH_4)_2CO_3\). This means that breakdown of moles of atom per mole of molecule is:

2 moles of nitrogen, with a molar mass of around 14

8 moles of hydrogen, with a molar mass of around 1

1 mole of carbon, with a molar mass of about 12

3 moles of oxygen, with a molar mass of about 16

The molar mass of ammonium carbonate is therefore:

2(14)+8(1)+1(12)+3(16)=28+8+12+48=about 96

Hope this helps!

heh.......... sorry man............... but this was posted over 5 hours ago........ so nobody is gonna see it and you probably dont need the answer anymore..... so errrr..... imma justtttt..... take these points :D

Answer:

A. equation

B. atoms

C. products

Explanation:

Answer:

A

A chemical equation shows both the reactants and the products of a chemical equation

The name for a positive ion is a cation.

Answer:

23.4

Explanation:

23.4 g mass of sulfur yielded by this reaction.

\(Percentage yield = (Actual / Theoretical)\times 100\)

The theoretical yield for S is as follows:-

\(71.0\ gCl_2\times\frac{1\ molCl_2}{71\ g Cl} \times\frac{1}{1} \ mol\times\frac{32.1\ g}{molS} =32.1\ gS\)

Actual yield=\(32.1\ gS\times73\%=23.4\ g\ S\)

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Answer:

La configuración electrónica del cloruro es 1s2 2s2 2p6 3s2 3p6.

Explanation:

The magnitude of the force acting on the body is 4000 Newtons.

To find the magnitude of the force, we can use Newton's second law of motion, which states that the force applied to an object is equal to the product of its mass and acceleration.

The given information includes the mass of the body (80 kg) and the resulting velocity (10 m/s). However, since the time duration (0.2 seconds) is also provided, we can use it to calculate the acceleration of the body.

The formula to calculate acceleration is:

Acceleration = Change in Velocity / Time

The change in velocity can be calculated by subtracting the initial velocity (which is 0 m/s as the body is at rest) from the final velocity:

Change in Velocity = Final Velocity - Initial Velocity

Change in Velocity = 10 m/s - 0 m/s

Change in Velocity = 10 m/s

Now, we can calculate the acceleration:

Acceleration = Change in Velocity / Time

Acceleration = 10 m/s / 0.2 s

Acceleration = 50 m/s²

Finally, we can calculate the magnitude of the force using Newton's second law:

Force = Mass x Acceleration

Force = 80 kg x 50 m/s²

Force = 4000 N

Therefore, the magnitude of the force acting on the body is 4000 Newtons.

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Answer: The limiting reactant will be used up first, meaning the reaction can no longer occur with only the excess reactant.

Explanation:

In a reaction the reactant which determines the yield of the reaction is called limiting reactant. Whereas, the reactant which is excess in amount does not itself lead the reaction after the limiting reactant is consumed.

In a reaction, the yield of the product depends on the number of moles of reactants. The reactants which is not sufficient in amount is determining the yield because as soon as this reactant is consumed, the production stopes.

The excess reactant on the other hand is excess in amount which can't lead the reaction alone after the consumption of the limiting reactant. Hence, we don't have to worry on the excess reactant.

The limiting reactant of a reaction can be determined  by calculating the number of moles of each reactants participating in it.

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The standard potential for the given galvanic cell is +1.06 V.

To calculate the standard potential for the given galvanic cell, we need to determine the individual reduction potentials of the half-reactions and then subtract the potential of the anode (where oxidation occurs) from the potential of the cathode (where reduction occurs).

Given reduction half-reaction potentials:

Ag+(aq) + e^− → Ag(s): E∘ = +0.80 V

Ni2+(aq) + 2e^− → Ni(s): E∘ = -0.26 V

Since we have the reduction potentials for both half-reactions, we can directly calculate the standard potential for the cell:

E∘(cell) = E∘(cathode) - E∘(anode)

= E∘(Ag+(aq) + e^− → Ag(s)) - E∘(Ni2+(aq) + 2e^− → Ni(s))

E∘(cell) = +0.80 V - (-0.26 V)

= +1.06 V

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At pH 0, glutamate (C5H8NO4-) exists predominantly as an anion with a negative charge.

HOOC-CH2-CH2-CH(NH3+)-COO-

The carboxyl group (-COOH) on the left side of the molecule is deprotonated, resulting in a negatively charged carboxylate group (-COO-). The amino group (-NH2) on the right side of the molecule is protonated, carrying a positive charge (+NH3+). The central carbon atom is connected to the rest of the molecule with a single bond.

It's important to note that the pH of 0 is highly acidic, and glutamate is found in this charged form due to the low pH environment. In physiological conditions or at higher pH levels, glutamate will exist in different forms depending on the pH of the solution.

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Density =mass/volume

=6/3

=2

Answer:

79.8%

Explanation:

Percentage yield = actual yield / theoretical yield x 100%

Percentage yield = 220.0 / 275.6 x 100%

=79.8%

The percent yield of of ferrous sulfide if the actual yield is 220.0 g and the theoretical yield is 275.6 g is 79.8%.

Percent yield is defined as the ratio of actual yield to the theoretical yield multiplied by 100. If the actual and theoretical yield are same then the percent yield is 100%.If actual yield is less than the theoretical yield then the percent yield is less than 100%.Reason of this condition arising is the incompletion of reaction or loss of sample during recovery process.

In cases where percent yield is over 100% it indicates that more sample is recovered than the predicted amount.This condition arises when there are other simultaneous reactions taking place leading to the formation of product. It can also arise if there is incomplete removal of impurities from the sample .

In the given example, percent yield can be found out by substituting values in mentioned formula. percent yield,=220/275.6×100=79.8%.

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Gasoline blending in petroleum refineries involves analyzing the properties of different components and determining the optimal mixing ratios to produce gasoline that meets specific octane rating and quality requirements.

Gasoline blending is a critical process in petroleum refineries where different components are combined to produce the desired gasoline product. In this example, the challenge is to blend gasoline from three different components.

To solve the gasoline blending problem, various factors need to be considered such as the desired octane rating, volatility, and environmental regulations. The first step is to determine the optimal proportion of each component based on their individual characteristics. This involves analyzing the properties of each component, such as its research octane number (RON), motor octane number (MON), and vapor pressure.

The second step is to develop a blending strategy that achieves the desired gasoline specifications. This involves determining the appropriate mixing ratios of the three components to meet the target octane rating and other quality requirements. The blending process requires precise calculations and adjustments to ensure the final gasoline product meets the desired specifications.

Additionally, economic considerations play a role in gasoline blending. The cost of each component and the market demand for specific gasoline grades can influence the blending decisions. Refineries aim to optimize the blend to minimize costs while meeting quality standards.

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Answer:

Strong acid

Explanation:

Answer:

Strong acid

Explanation:

δrg° for the given reaction Pb₂+(aq) + Cu(s) → Pb(s) + Cu²⁺(aq) is 33.5 kJ/mol. This value indicates the direction and magnitude of the spontaneous change in free energy during the reaction, and it can provide insights into the thermodynamics of chemical reactions.

Calculating δrg° for a chemical reaction involves determining the standard free energy change of the reaction under standard conditions, which can provide insights into the spontaneity and feasibility of the reaction.

The reaction given is: Pb₂+(aq) + Cu(s) → Pb(s) + Cu²⁺(aq)

To calculate δrg° for the reaction, we can use the equation:

δrg° = Σnδf°(products) - Σnδf°(reactants)

where δf° is the standard molar free energy of formation for each reactant and product and n is the number of moles of each substance involved in the reaction.

The standard molar free energy of formation for each substance can be obtained from tables.

Substituting the values and solving for δrg°, we get:

δrg° = 33.5 kJ/mol

Therefore, δrg° for the given reaction is 33.5 kJ/mol.

Understanding the standard free energy change of a chemical reaction is crucial in predicting the feasibility of the reaction under standard conditions. The δrg° value indicates the direction and magnitude of the spontaneous change in free energy during the reaction.

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The material that forms oxide in the presence of oxygen and water only, and its suspension in water turns red litmus blue is Sodium oxide (Na2O).

Sodium oxide (Na2O) is a material that reacts with water and forms a basic solution with a pH greater than 7. It forms oxide in the presence of oxygen and water only. The chemical equation for the reaction of sodium oxide with water is given below:Na2O + H2O → 2NaOH.

The water molecules get hydrolyzed by sodium oxide to form sodium hydroxide (NaOH), which is a strong base. Sodium hydroxide gives a basic solution with a pH of about 12. It has the property of turning red litmus blue. Therefore, the material is Sodium oxide (Na2O).Hence, the main answer is Sodium oxide (Na2O).

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Trans-1-benzyl-3-phenylcyclopentane is the IUPAC name for the given compound. It is a cyclic hydrocarbon containing a cyclopentane ring that is substituted with benzyl and phenyl groups. The trans isomer of this compound has the benzyl and phenyl groups on opposite sides of the cyclopentane ring.

The structural formula of trans-1-benzyl-3-phenylcyclopentane is as follows:
It can be seen from the structural formula that the benzyl group is attached to the first carbon atom of the cyclopentane ring, whereas the phenyl group is attached to the third carbon atom of the ring. The trans-configuration is indicated by the double bond between the second and third carbon atoms of the cyclopentane ring.

The structural formula can be further simplified as follows:

The structural formula shows that trans-1-benzyl-3-phenylcyclopentane contains a total of 15 carbon atoms and 14 hydrogen atoms.
The structural formula can be used to predict the physical and chemical properties of trans-1-benzyl-3-phenylcyclopentane, such as its melting and boiling points, solubility, reactivity, and so on.

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Answer:

10mm2

Explanation:

I did the test on edg too lol

The solute with a surface area of 10 mm² will dissolve the quickest.

Solubility can be described as the maximum amount of a substance that will dissolve in a given solvent at a temperature. The effects of temperature on solubility can be seen in both solids and gases but the pressure effect is related to the solubility of gases. Surface area is a factor in how slowly or quickly the saturation point will be reached.

The rate of solubility is affected by the surface area of a solid. If we were to increase the surface area of a solute then increase how quickly the solute would dissolve in solution. Even the maximum solubility can be achieved more quickly with greater surface area.

Increasing the surface area will increase the rate of solubility of a solute therefore solute with a surface area of 10 mm² will dissolve the quickest.

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Answer:

alpha-linolenic acid and linoleic acid

Explanation:

Hope this helps!

Answer:

wax, candlewick, and oxygen

Explanation:

The burning of the candle is both a physical as well as a chemical change. The reactants are the substances or the raw materials that are required for a reaction to the process. In the process of burning a candle, the reactants are the fuel which includes wax and wick, and oxygen which is found in the air. The products found at the end of the reaction are carbon dioxide and water vapor.