What is the (Ht] in a solution if the [OH'] = 5.42 x 10^-5 M?

Answers

Answer 1

Answer:

The [H+] in the solution is found using the Kw expression: Kw = [H+][OH-]. Since Kw is known and [OH-] is given, [H+] can be calculated.

The concentration of hydrogen ions ([H+]) in a solution can be determined using the equilibrium constant for water (Kw). Kw is the product of the concentrations of hydrogen ions and hydroxide ions ([OH-]) in the solution. At 25°C, Kw has a constant value of 1.0 x 10^-14. Thus, if the [OH-] concentration in the solution is known, the [H+] concentration can be calculated by dividing Kw by [OH-]. In this case, the [OH-] is given as 5.42 x 10^-5 M, so [H+] can be found by dividing 1.0 x 10^-14 by 5.42 x 10^-5, which gives a value of 1.84 x 10^-10 M. Therefore, the (Ht] in the solution is 1.84 x 10^-10 M.

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What is the percentage of nitrogen in N2O

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The percentage of nitrogen in nitrous oxide or N₂O is 63.64% and percent of oxygen is 36.36 %.

What is percent composition ?

It is the percent of each element which exists in a compound. It is calculated in three methods:

1) percent w/w

2) percent v/v

3) percent w/v

Percent w/w is the percent composition wherein both the components are solids.Percent v/v is percent composition wherein the 2 substances are liquid and percent w/v is percent composition where one substance is solid and one is in liquid form.

The percent composition of all substances is equal to 100%.The percent composition of nitrogen in nitrous oxide is calculated as follows:

molar mass of nitrous oxide=44 g

molar mass of nitrogen =14 g

As nitrous oxide has 2 nitrogen ,therefore 14×2=28

To find percent composition,

molar mass of nitrogen in nitrous oxide/molar mass of nitrous oxide×100

∴28/44×100=63.64%

Thus, percent of nitrogen in N₂O is 63.64%.

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Answer:

63.64% Nitrogen

36.36 Oxygen

The results of an investigation are the
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Answers

Answer: ending results

Explanation:

Final answer:

The results of an investigation are the observations and data collected during an experiment or research, which may be qualitative or quantitative. For example, the results of a plant growth experiment could include measurements and descriptions of the plants under different light conditions.

Explanation:

The results of an investigation are the findings obtained from carrying out an experiment or research. An investigation seeks to answer a question, test a hypothesis, or solve a problem. The results constitute the data collected and analyzed, which may be quantitative (numerical) or qualitative (descriptive) in nature. For example, if you conduct an investigation to determine the effect of light on plant growth, your results might include measurements of plant height, color intensity, and a description of leaves condition at different light exposures.

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If you were asked to describe metals and magnetism you could say. A. non–paired electrons spin in opposite directions in all metals, creating a magnetic field. B. metals are magnets because they have more electrons than non–magnetic materials. C. metals can become magnetic if they have many spinning electrons that create magnetic fields. D. the electrons in some metals pair up to create a magnetic field.

Answers

Answer : Option D) the electrons in some metals pair up to create a magnetic field.

Explanation : Most of the metalsare magnetic in nature including some exceptions. When the unpaired electrons get aligned with the magnetic field they posses magnetism. Also there are some paired electrons in metals which align themselves according to the magnetic field and create magnetism in them.

The correct answer is C; Metals can become magnetic if they have many spinning electrons that create magnetic fields.

Further Explanation;

As long as there are many spinning electrons anything metal will become magnetic. Ferromagnetic is when there are only some certain types of metals that are attracted to magnetic. If you were to make an electromagnet, you would only need to take an insulated wire and wrap it around the metal that has ferromagnetic properties.

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A pencil has density of 0.875 g/cm^3. It has a volume of 4.0 cm^3. What is the mass?

Answers

Answer:

3.5g

Explanation:

$Density=(mass)/(volume)\n Mass= Density X Volume\nMass = 0.875 X 4.0\nTherefore, Mass = 3.5 g$

Answer:

3.703703703703

Explanation:

What is the total amount of heat required to vaporize 1.00 gram of H2O(g) at 100.0C and 1 atmosphere?(1) 4.18 J(2) 334 J(3) 373 J(4) 2260 J

Answers

for this you will need the latent heat capacity for the vaporization of water.

When the drug heroin comes into contact with the Marquis reagent chemical what happens?

Answers

when it comes into contact with It will turn purple

When the drug herion comes into contact with the Marquiw reagent, it changes color to purple.

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Part AGiven the following equation, N2O(g) + NO2(g) → 3 NO(g) ΔG°rxn = -23.0 kJ Calculate ΔG°rxn for the following reaction. 18 NO(g) → 6 N2O(g) + 6 NO2(g) Answer Choices To Choose From: A) -3.83 kJ B) -138 kJ C) -23.0 kJ D) 23.0 kJ E) 138 kJ Part B CO2(g)→C(s)+O2(g)ΔH∘rxn= +393.5 kJ (ΔSsys<0, ΔSsurr<0) In addition, predict under what temperatures (all temperatures, low temperatures, or high temperatures), if any, the reaction in part D will be spontaneous A) The reaction is spontaneous at all temperatures. C) The reaction is spontaneous at high temperatures. D) The reaction is nonspontaneous at all temperatures.