Calculate the percent ionization of formic acid in a solution that is 0.010 M HCOOH and 0.005 M HCOONa. Ka (HCOOH) = 1.7x10-4 ?

Answer:

Oil and vinegar separate because it is a suspension

Explanation:

When you let suspensions sit the particles begin to layer out, in the salad dressing the oil layers out on top of the vinegar. The two layers of oil and vinegar don't actually dissolve in each other. The layer with the lower density (oil) floats on top of the layer with a higher density (vinegar)

Water and vinegar are both hydrophilic and mix, whereas the oil is hydrophobic. Oil and vinegar separate because it is a suspension

Hydrophilic molecule are water-loving polar molecule.

They interact with water or they are dissolved in water or water like polar solvent.

For instance, the phospholipid molecules of the plasma membrane has a hydrophilic phosphate group.

Hydrophobic is a water hating  substance which can not dissolve in water, but other non-polar solvent.

Thus hydrophobic substances are lipophilic in nature  and the hydrophobic solvents are used to  separate water-immiscible substances from water.

The layers of oil and vinegar can not  dissolve with each other. The oil layer has the  lower density floats on top of the layer with a higher density product called vinegar.

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C. Calcium is your best bet. Calcium chloride is amongst inorganic compounds.

Neil Bohr used the fluorescent screen and an alpha particle detector to study the structure of an atom.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

The atom as a whole is neutral and stable due to presence of oppositely charged particles.

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Answer:

\(V_2=5.32L\)

Explanation:

Hello there!

In this case, according to the given pressure, temperature and volume, it is possible for us to calculate the final volume via the combined ideal gas law:

\(\frac{P_2V_2}{T_2}=\frac{P_1V_1}{T_1}\)

In such a way, we solve for the final volume, V2, to obtain:

\(V_2=\frac{P_1V_1T_2}{T_1P_2}\)

Then, we plug in the given data to obtain:

\(V_2=\frac{1.19atm*2.3L*380K}{326K*0.60atm}\\\\V_2=5.32L\)

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Answer:

42.2075 grams

Explanation:

Answer:

A wind-up toy is wound up and moving across level ground. The toy is speeding up.

Explanation:

this will or should helpyou

Answer:

It's 550 milliliters.

Explanation:

I hope this helps.

The nuclear equation for the formation of titanium-48 from a radiosotope emitting a positron is: Radiosotope → Titanium-48 + Positron.

To express the formation of titanium-48 from a radiosotope emitting a positron, we can write the nuclear equation as follows:

Reactant Nucleus: Radiosotope

Product Nucleus: Titanium-48

Particle Emitted: Positron

The nuclear equation can be written as:

Radiosotope → Titanium-48 + Positron

This equation represents the decay of the radiosotope, where it emits a positron and forms titanium-48 as the product nucleus.

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Answer: The initial temperature of the iron was \(515^0C\)

Explanation:

\(heat_{absorbed}=heat_{released}\)

As we know that,  

\(Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})\)

\(m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]\)         .................(1)

where,

q = heat absorbed or released

\(m_1\) = mass of iron = 360 g

\(m_2\) = mass of water = 750 g

\(T_{final}\) = final temperature = \(46.7^0C\)

\(T_1\) = temperature of iron = ?

\(T_2\) = temperature of water = \(22.5^oC\)

\(c_1\) = specific heat of iron = \(0.450J/g^0C\)

\(c_2\) = specific heat of water= \(4.184J/g^0C\)

Now put all the given values in equation (1), we get

\(-360\times 0.450\times (46.7-x)=[750\times 4.184\times (46.7-22.5)]\)

\(T_i=515^0C\)

Therefore, the initial temperature of the iron was \(515^0C\)

Answer:

Explanation:

dilute hydrochloric acid is added to distilled water to increase the ionization of water.

Answer:

7cm3

.........

Answer

C) no energy is lost; the total amount of energy remains the same.

Explanation

The law of conservation of energy states that "The energy can neither be created nor destroyed - only converted from one form of energy to another." Therefore some energy will be used for metabolism while the other can be used for other properties and some can be stored.

Sulfuric acid is formed when sulfur dioxide (SO2) and other sulfur compounds are released  

The atmosphere from the combustion of fossil fuels, such as coal and oil, and industrial processes, including the burning of sulfur-containing materials. These sulfur compounds undergo chemical reactions in the atmosphere, combining with oxygen and water vapor to form sulfuric acid.Nitric acid is produced when nitrogen oxides (NOx), primarily nitrogen dioxide (NO2), react with water vapor in the atmosphere. Nitrogen oxides are released from various sources, including vehicle emissions, power plants, and industrial processes. These nitrogen oxides undergo atmospheric reactions, leading to the formation of nitric acid.

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Answer:

1. chemical change

2. true

3. an unequal sharing

Explanation:

Answer: Since the reaction is 2Ca(NO3)2 = 2CaO + 4NO2 + O2

1) - given the stoichiometric coefficients, we know that 2 moles of Ca(NO3)2 will produce 4 moles of NO2, hence, 1 mole will produce 2 moles of NO2

2) - 328 g produces 22.4 L, since One mole of any gas at S.T.P. occupies the same volume which is 22.4 L.

Hence, 65.6 g produces (65.6*22.4)/328 = 4.48 L

3) - 328 g produces 112 g CaO. Therefore, 65.6 g produces = (65.6*112)/328 = 22.4 g CaO.

4) - Given the stoichiometric coefficients, we know 5 moles of gaseous products are already being produces ( 4+1) by 2 moles of reactant.

5) - 44.8 L at STP = 2 moles of NO2, since One mole of any gas at S.T.P. occupies the same volume which is 22.4 L.

Hence, to produce 2 moles of NO2, we need 1 mole of reactant = 164 g

Hope this helps :)

Explanation:

Answer:

B

Explanation:

They use energy from sunlight to synthesise glucose from carbon dioxide and water.  

The evidence for atoms having nuclei with a relatively small size compared to the entire atom comes from a variety of sources.

One of the most important is the fact that atoms are largely empty space. If the nucleus were a significant fraction of the size of the entire atom, we would expect to see much less empty space in the structure of matter than we actually observe.

Additionally, experiments using X-rays and other high-energy particles have shown that these particles are scattered by the electrons in atoms, indicating that the electrons occupy a relatively large space compared to the nucleus.

Finally, studies of atomic spectra have revealed that certain lines in the spectra correspond to transitions between energy levels in the nucleus, suggesting that the nucleus is indeed a small, highly concentrated region within the atom.

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Answer:

B if i'm not mistaken.

Explanation:

Answer:

Heterogeneous

Explanation:

Here, we have to draw the main organic products of a given bimolecular substitution reaction and the curved arrow mechanism of the reaction.

(Answer is attached in the picture)

Substitution reactions involve the replacement of one functional group in a molecule by another functional group. Nucleophilic substitution reactions involve a nucleophilic reagent with a substrate that has a positively or partially positively charged portion of the molecule (electrophile).

An electrophile is an atom or molecule that lacks electrons. In organic reactions, electrophiles act as electron acceptors (Lewis's acids). These reagents can be cations or neutral molecules that have relatively positively charged atoms.

Meanwhile, a nucleophile is an atom or molecule that is rich in electrons. The nucleophile has an electron pair that can be donated (a Lewis base). Some nucleophiles are neutral molecules that have a PEB and some are negatively charged. In a chemical reaction, electrons from the nucleophile strike the electrophile center to form new bonds as a result of the reaction.

On the question:

Use of curved arrows to indicate: A broken or formed bond.

Electron layer protective layer arrow

In the reaction of this problem, I replaced Br (Substitution) and Br bonded with Na⁺.

The nucleophile "replaces" the leaving group.

Called a substitution reaction: I replace Br (change places).

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Answer:

If the volume of a gas is decreased by changing the shape of the container, the number of collisions per area between the molecules and the container walls will increase. This corresponds to an increase in the gas pressure, which is the force exerted per area.

Answer:

H2O (2x1.008 + 1x15.999) = 18.015 g/mol

CO2 (1x12.011 + 2x15.999) = 44.01 g/mol

BF3 (1x10.81 + 3x18.998) = 67.81 g/mol

K2O (2x39.098 + 1x15.999) = 94.20 g/mol

BaCO3 (1x137.33 + 1x12.011 + 3x15.999) = 197.34 g/mol

Since 273 k – 243 k equals 30, the temperature change for an object going from 273 k to 243 k is 30 k.

Colors and temperatures can both be measured in Kelvin: A temperature unit commonly used in science is the Kelvin scale. Lord Kelvin created the scale after realizing the need for one with absolute zero as the zero point, which translates to 0 K as the lowest attainable temperature, or -273,15 °C.

On the Kelvin scale, a body's temperature cannot be negative. Since the Kelvin scale's absolute zero represents the lowest temperature that may exist, it is impossible for it to be negative.

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Answer:

c

Explanation:

i think soo. but not sure.

Answer:

Light travel in _____straight_____ lines until reflected or refracted

The liquidus line separates the following combinations of phase fields: Liquid and Liquid + alpha. The correct option is b.

What is a phase field? A phase field is a technique for representing the microstructure of materials. It is used in materials science, mathematics, and computer science to simulate and study the behavior of materials in the solid and liquid phases. It is a multi-component field that contains information on the concentration of various components, their phase, and the local temperature, as well as other relevant variables.

The liquidus line is defined as the boundary between the liquid phase field and the field that includes both the liquid and the alpha phase. As a result, the liquidus line separates the following combinations of phase fields: Liquid and Liquid + alpha.

So, the correct option is b) Liquid and Liquid + alpha.

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Answer:

1. Age

2. Time

3. Same Puzzle

Explanation: Independent variable are what changes in the experiment and allow you to get a result. Dependent variables measure what you are trying to find from an experiment. Constants are what remain the same throughout all trials.

Answer:

Velocity

Explanation:

Answer: velocity I’m sure

Explanation:

Answer:

25mph

Explanation:

cold fronts generally Advance at an average speed of 20 to 25 miles per hour. Towards the east faster in the winter than summer and are usually oriented along the northeast to Southwest line