Chemistry High School

If 8. 0 ml of water is added to 2. 0 ml of a 0. 500 m koh solution, the concentration of koh is changed to.

Answers

Answer 1

Answer: 0.1 M

Explanation:

Originally, [tex]0.500=\frac{\text{moles of solute}}{0.002}[/tex], so there was 0.001 mol of KOH.

Now, there is 8.0+2.0=10.0 mL of solution, so the new concentration is:

[tex]\frac{0.001}{0.01}=\boxed{0.1 \text{ M}}[/tex]

If 8. 0 Ml Of Water Is Added To 2. 0 Ml Of A 0. 500 M Koh Solution, The Concentration Of Koh Is Changed

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What is the speed of light written in standard numerical form?

Answers

Hello there, the answer is

Draw a diagram using H+ signs and OH- symbols of a solution that is acidic. Hint: Use the
diagram seen in the prelab.



WILL MARK BRAINLIEST!!!!

Answers

More positive ions shows acidic whereas more negative ions indicates basic solution.

Which charge show acidic solution?

That side which has more positive charges is considered as acidic solution while on the other hand, that region where negative charges are present in large number as compared to positive charges is considered as basic or alkaline solution.

So we can conclude that more positive ions shows acidic whereas more negative ions indicates basic solution.

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Which of these is a challenge related to nuclear fusion reactions?
A. Waste products have a longer half-life.
B. It is technically challenging to create these reactions safely and
efficiently.
C. The fuel for nuclear fusion is less available than uranium-235.
D. There is less of a chance of runaway chain reactions.

Answers

Answer:B

Explanation:got it right

The statement, "It is technically challenging to create nuclear fusion reactions safely and efficiently", is related to nuclear fusion reaction. Thus, Option B is correct.

This is due to the need to reach and maintain the extreme temperatures and pressures required for the reaction to occur and to confine and control the plasma in which the reaction takes place.

Nuclear fusion is a promising source of energy that has the potential to provide abundant, clean & sustainable power. However achieving nuclear fusion requires overcoming several challenges including the technical difficulties of creating and controlling the extreme conditions required for the reaction to occur.

Fusion reactions can produce high-energy neutrons that can damage the materials used to contain the reaction and require special handling and disposal. While progress has been made in developing fusion technologies, there is still much work to be done to make fusion a viable source of energy for the future.

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Alkaline batteries are non-rechargeable.
Why do alkaline batteries eventually stop working?

Answers

Answer:

Alkaline batteries stop working when all of the manganese dioxide has been converted.

Explanation: Hope it helps you :)))

Have a good day

Alkaline batteries eventually stop working because the chemicals inside them react and eventually use up all their energy.

The chemicals in an alkaline battery are zinc and manganese dioxide, which are separated by a separator. When the battery is used, zinc and manganese dioxide react to produce electricity.

The reaction between zinc and manganese dioxide is a one-way reaction, meaning that it cannot be reversed. This means that once the chemicals in the battery are used up, the battery will no longer produce electricity.

The rate at which an alkaline battery loses its charge depends on a number of factors, including the temperature, the amount of current being drawn from the battery, and the age of the battery.

In general, alkaline batteries will last longer in cool temperatures and when they are not being used heavily.

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Select all that apply.

When the products of a reaction have a higher enthalpy than the reactants:

The change in enthalpy is positive.
The reaction is exothermic.
The reaction is endothermic.
The change in enthalpy is negative.

Answers

When the enthalpy of products is higher than that of reactants, such a reaction is said to be endothermic.

Enthalpy

The enthalpy of a system refers to the heat content of the system.

When the enthalpy of reactants is higher than that of products in a reaction, such a reaction is said to be exothermic. On the other hand, if the enthalpy of products is higher than that of the reactants, it is endothermic.

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Describe the difference between the rate of diffusion seen for sodium and urea.

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Urea is diffused more slowly because it’s larger than sodium.

Which statements describe proper use of a filter funnel?

Answers

Answer:

Fold the filter paper in fourths before placing it in the funnel and pour all the liquid through the funnel.

If an object goes through a chemical reaction but does not change in mass that object has

Answers

Answer:

The law of conservation of mass

Explanation:

The law of conservation of mass

Explain how each property affects the energy in a wave:
Amplitude:
Wave speed:
Wavelength:
Frequency:

Answers

Answer:Amplitude:the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position. It is equal to one-half the length of the vibration path.Wave speed:Wave speed is the distance a wave travels in a given amount of time, such as the number of meters it travels per second. Wave speed is related to wavelength and wave frequency by the equation: Speed = Wavelength x Frequency. This equation can be used to calculate wave speed when wavelength and frequency are known.Wavelength:Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire. In wireless systems, this length is usually specified in meters (m), centimeters (cm) or millimeters (mm).Frequency:frequency, in physics, the number of waves that pass a fixed point in unit time; also, the number of cycles or vibrations undergone during one unit of time by a body in periodic motion.

Explanation:

Which information must be known about a compound to find the molecular formula from the empirical formula?

Answers

Answer:

Empirical formulas can be determined from the percent composition of a compound. In order to determine its molecular formula, it is necessary to know the molar mass of the compound. Chemists use an instrument called a mass spectrometer to determine the molar mass of compounds.

hope this helps :3

Determine the number of neutrons in 20 grams Uranium-238

Answers

Answer:

146 neutrons

Explanation:

The atomic number of uranium (see periodic table) is 92, and the mass number of the isotope is given as 238. Therefore, it has 92 protons, 92 electrons, and 238 — 92 : 146 neutrons.

What is the formula for the ether functional group?

Answers

The formula for the functional group of ether is R–O–R– group. Details about functional group can be found below.

What is a functional group?

A functional group is a specific grouping of elements that is characteristic of a class of compounds, and determines the chemical properties of that class.

Ether is any of a class of organic compounds containing an oxygen atom bonded to two hydrocarbon groups.

Therefore, the formula for the functional group of ether is R–O–R– group.

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How many grams are in 4 moles of H2O?​

Answers

Answer:

There are 72grams in 4 moles of H20

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