Name the type of organic compound from each description of the functional group: (c) group that has single and double bonds and is acidic in water;

Answer:

Explanation:

ℎ ℎ

Sucrose has the molecular  C₁₂H₂₂O₁₁ . if a sucrose sample contains 9.0x10²⁴ atoms of hydrogen, There are 1.4370 x10²⁶ molecules of sucrose are present in the sample.

Sucrose C₁₂H₂₂O₁₁ contain  C₁₂H₂₂O₁₁  Hydrogen

First we should how how many percentage of hydrogen in sucrose

The following formula will be used to determine the percentage of elements present in a molecule:

(Mass of Element / Mass of Molecule) / 100 equals the percentage of an element.

Sucrose's molecular weight is.

= (12)12 + (1)22 + (16)11, 

where 12 is the mass of an atom of carbon.

Hydrogen's atomic mass is 1, thus.

16 = Oxygen Atomic Mass

mass sucrose = 144 + 22 + 176

mass sucrose = 342 g/mol

% of H  =  (22 / 342) ×100    =  6.43 %

to calculate how many molecules sucrose are present we can compare percentage of hydrogen to % sucrose

 % hydrogen         =         % sucrose            

atom hydrogen           molecules of sucrose

6.43 %        =              100%              

9.0x10²⁴          molecules of sucrose    

molecules of sucrose    = 1.4370 x10²⁶ molecules

Therefore,  There are 1.4370 x10²⁶ molecules of sucrose are present in the sample.

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a sample of ammonia, nh3, is completely decomposed to nitrogen and hydrogen gas. The partial pressure of nitrogen if the total pressure after the reaction is 741 torr Write a correctly balanced equation:  2NH3(g) ==> 3H2(g) + N2(g)

Partial pressure of a gas = mole fraction of that gas x total pressure

Total moles of gas = 1 mole N2 + 3 moles H2 = 4 moles

Mole fraction N2 = 1 mole/4 moles = 0.25

Partial pressure N2 gas = 0.25 x 866 mm Hg = 217 mm Hg

The chemical element hydrogen is represented by the letter H and atomic number 1. The lightest element is hydrogen. Usually, hydrogen exists as a gas with the formula H2, which is composed of diatomic molecules. It burns easily and is non-toxic, flavourless, colourless, and odourless. In the cosmos, hydrogen is the most prevalent chemical, making up around 75% of all ordinary matter. Plasma hydrogen makes up the majority of stars, including the Sun. Hydrogen primarily appears as organic and water molecules on Earth. One proton, one electron, and no neutrons are present in each of the atoms of 1H, the most prevalent isotope of hydrogen.

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Answer:

Longer wavelengths self means by it's name that the distance between the trough and crust are lesser than that of shorter wavelengths!

The word Lower frequency implies lower energy, thus light cannot easily penetrate the EM wave to excite electrons.

Examples of EM waves with longer wavelength :

Radiowaves, microwaves, etc..

With the characteristics of the states of matter and the transformation processes, it is possible to find the result for the description of the water cycle:

The water cycle or hydrological cycle are all the changes that water has in a closed cycle.

The water in the liquid state is heated by the sun, which causes a part of the water to transform into gas through the evaporation process, these gas particles are very small therefore the pressure of the air makes them rise, as they rise through the atmosphere the temperature drops, therefore with the condensation process they pass to the liquid state.

The small drops of the atmosphere are joining them until their weight makes them fall towards the earth due to the rain process if the temperature is intermediate, if the temperature is extremely low the drops can pass to the solid state through the process of solidification falling as snow and ice.

When it is liquid water and it is soldered on the land, it can have a process of infiltration in the land and rocks called runoff and reach either the seas or underground levels where it is stored.

We can see that in this water  is not lost only, it is transformed from one state to another, but the total amount of water remains constant.

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The standard potential of a galvanic cell where x is the anode and y is the cathode can be determined using the equation E°cell = E°cathode - E°anode, where E°cell is the standard cell potential, E°cathode is the standard reduction potential of the cathode, and E°anode is the standard oxidation potential of the anode.

The standard potential is a measure of the tendency of the cell to produce a flow of electrons. A positive standard cell potential indicates that the cell will produce a flow of electrons from the anode to the cathode. The magnitude of the potential is dependent on the specific electrode materials and conditions of the cell.
The standard potential of a galvanic (voltaic) cell is determined by the difference in standard reduction potentials between the anode (X) and the cathode (Y). In this cell, X undergoes oxidation, losing electrons, while Y undergoes reduction, gaining electrons. The standard cell potential (E°cell) can be calculated using the formula:
E°cell = E°cathode - E°anode
Here, E°cathode is the standard reduction potential of Y and E°anode is the standard reduction potential of X. To find the values for X and Y, refer to the standard reduction potential table. A positive E°cell indicates a spontaneous reaction, while a negative value implies non-spontaneity.

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The substance will sink into a beaker containing 100 mL (100 cm3) of water.

The density of the substance is 1700 lb/m³. The density of water is 1 g/cm³, so the substance is heavier than water.

As a result, the substance would sink into a beaker containing 100 mL (100 cm³) of water. 1700 lb/m³ = 0.768 kg/L. 1

00 mL is 0.1 L. 0.1 L × 0.768 kg/L = 0.0768 kg.

Density is calculated by mass divided by volume:

Density = Mass ÷ Volume.

The mass of the substance is 0.0768 kg.

Density of substance = 0.0768 kg ÷ 0.0001 m³ = 768 kg/m³.

The substance's density is 768 kg/m³, which is heavier than the density of water.

As a result, the substance will sink into a beaker containing 100 mL (100 cm3) of water.

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The Number of moles present is 0.5mol.

What is ideal gas law?

The general gas equation, also known as the ideal gas law, is the equation of state for a fictitious ideal gas. The equation for the ideal gas's relationship to pressure P, volume V, temperature T, and number of moles n is known as the ideal gas law.

Use P V = n R T 

R = 0.08206 L -atm /mol -K when the pressure is in atmosphere atm, the volume is in litres L, and the temperature is in Kelvin K.

One atm is equal to 760.0 mm Hg, so depending on how the pressure changes, there will either be a division or multiplication.

Divide the value in mmHg by 760.0 mmHg/atm to convert it to atm.

P= 912mmHg /760mmHg/atm=1.2atm

to convert °C to kelvin,

  K=°C +273= 20+273=293K

R=0.08206

Add these values to given equation,

n=PV/RT

 = 1.2×10÷0.08206×293

 = 12÷24.02

 =0.5mol

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The term "pyo-" (py/o/rrhea; pyo/genic) means "pus" or "related to pus."

The prefix "pyo-" is derived from the Greek word "pyon," which means pus. When used as a prefix in medical terminology, "pyo-" indicates a condition or process related to pus or the presence of pus.

For example, "pyorrhea" refers to a condition characterized by the discharge of pus from a wound or an infection of the gums. In this case, the term combines "pyo-" (meaning pus) and "-rrhea" (meaning discharge or flow).

Similarly, "pyogenic" refers to something that causes or is related to the production of pus. It is often used to describe bacteria or microorganisms that can lead to the formation of pus in infected tissues.

In summary, the prefix "pyo-" in medical terminology denotes pus or the involvement of pus in a specific condition, indicating a discharge, infection, or pus-forming process.

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Answer: There are no attractive or repulsive forces between particles.

Explanation: Gas molecules influence each other only by collision

Answer:

B. tension

Explanation:

a straight stretched rubber band experiences tension which is a stress that tries to pull matter apart.

Answer: A The Triangle Fire was a tragedy that could have been prevented.

Explanation:

The Triangle Fire was a tragedy that happened in the factory of Shirtwaist Company in New York City where there was.a.fore outbreak and about 145 employees of the company were killed.

The deaths could have been prevented because the company neglected safety measures such as having a good and reliable pump system, having readily available fire extinguishers. Also, what resulted in the lethal nature of the incident was because the doors within the building of the factory were locked.

The tragedy generated lots of attention and series of laws were been out in place in order to ensure that workers are safe at their workplace.

Answer:

Depending on the thermometer, it may have the ability to go as high or low as melting, freezing or boiling point for water. Just make sure you know the boiling, melting and freezing points in Celsius, Fahrenheit and/or Kelvin and read your thermometer accordingly.

Explanation:

Answer:

\(\boxed {\boxed {\sf 0.0018 \ mol \ H_2 O }}\)

Explanation:

First, we need to find the molecular mass of water (H₂O).

H₂O has:

Use the Periodic Table to find the mass of hydrogen and oxygen. Then, multiply by the number of atoms of the element.

There are 2 hydrogen atoms, so multiply the mass by 2.

Now, find the mass of H₂O. Add the mass of 2 hydrogen atoms and 1 oxygen atom.

Next, find the amount of moles using the molecular mass we just calculated. Set up a ratio.

\(0.032 \ g \ H_2 O* \frac{ 1 \ mol \ H_2 O}{18.0152 \ g \ H_2 O}\)

Multiply. The grams of H₂O will cancel out.

\(0.032 * \frac{1 \ mol \ H_2 O}{18.0152 }\)

\(\frac{0.032 *1 \ mol \ H_2 O}{18.0152 }\)

\(0.00177627781 \ mol \ H_2 O\)

The original measurement given had two significant figures (3,2). We must round to have 2 significant figures. All the zeroes before the 1 are not significant. So, round to the ten thousandth.

The 7 in the hundred thousandth place tells us to round up.

\(0.0018 \ mol \ H_2 O\)

There are about 0.0018 moles in 0.032 grams.

Answer:

There are four main factors that can affect the reaction rate of a chemical reaction:

Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. ...

Physical state of the reactants and surface area. ...

Temperature. ...

Presence of a catalyst.

There are various type of chemical reactions in chemistry like combination reaction , displacement reaction. One of these is the decomposition reaction. The correct option is option D.

Decomposition reaction is the one in which molecules breaks down in its constituent in presence of energy. Energy can be in any form, it can be light energy , heat energy.

Decomposition of water is done by providing electricity and the reaction is called electrolysis. Lysis means to break. To give decomposition reaction molecule must have more than one element.

The fourth reaction describe a decomposition reaction (NaNO3 decomposed to become NaNO2 and O2). First and third reaction are considered combustion reaction (reacting with oxygen). Second reaction is acid-base reaction.

Therefore, the correct option is option D.

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Answer:

The amount of sun that is being reflected and how hot the sunlight being reflected is

Explanation:

Moles of viruses have a mass equal to the mass of an oil tanker is equal to 5.55 moles and the mass of 1 mole of viruses =  5.4 × 10 ⁹ g

Any species with 1 mole = 6.022 × 10²³ atoms .

Therefore ,1 mole of virus mass = 9 × 10⁻¹² × 10⁻³ g × 6.022 × 10 ²³

                                                            = 5.4 × 10 ⁹ g

2. Let n moles virus mass be = 3 × 10⁷ kg

                                          = 3 × 10¹⁰ g

               n × 5.4 × 10⁹ = 3 × 10¹⁰

                  n = 5.55 mole

The mole is the unit of measure of substance in the Worldwide Arrangement of Units. The amount measure of substance is a proportion of the number of rudimentary elements of a given substance that are in an item or test. The mole is characterized as precisely 6.02214076×10²³ rudimentary substances

The mole is a SI unit that connects the minute and plainly visible world. It lets scientists measure a lot of very small things, like atoms or molecules, in huge quantities. In the beginning, the units "gram-atom" and "gram-molecule" were used to describe the quantities of chemical elements or compounds.

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The complete reaction equation, using the lowest number of coefficients possible is;  HF(aq)  +  OH^-(aq)  ----> F^-(aq) + H2O(l)

The reaction equation here shows the reaction between hydrogen fluoride and the the hydroxide ion from a base. This is a neutralization reaction as shown.

The reaction can fully be represented as;

HF(aq)  +  OH^-(aq)  ----> F^-(aq) + H2O(l)

This is the full reaction equation using the lowest number of coefficients possible in the reaction equation.

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The reaction profile as required in the question is shown in the image attached.

Chemical reactions that emit heat into their surroundings are known as exothermic reactions. The total energy of the reactants is greater than the total energy of the products in an exothermic process. The extra energy is consequently released as heat.

We can see from the reaction profile that we have here that energy is given off in the reaction and this can be shown by the curve that is in the image attached.

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Acidity of a compound is defined by its ability to donate a proton to the solution, in other words, by its acidity constant or pKa value. The smaller the value of pKa, the stronger the acid. Therefore, to decide which one of the given acids is most acidic, we need to compare their pKa values.

Both 3-nitrobenzoic acid and 4-nitrobenzoic acid are derivatives of benzoic acid and differ in the position of the nitro (NO2) group, which is substituted in the 3rd and 4th positions of the aromatic ring respectively. The presence of nitro group increases the acidity of the benzoic acid, making both the nitrobenzoic acids more acidic than the parent benzoic acid.In general, electron-withdrawing substituents such as nitro groups increase the acidity of the compound because they destabilize the conjugate base by withdrawing electron density from the anionic oxygen.

The greater the electron-withdrawing effect, the lower the pKa value of the acid.  The nitro group has a stronger electron-withdrawing effect in the ortho and para positions than in the meta position. Hence, 4-nitrobenzoic acid is more acidic than 3-nitrobenzoic acid. Therefore, the most acidic compound among the two given compounds is 4-nitrobenzoic acid.

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The discovery of isotopes led to the modification of Dalton's postulate stating that all atoms of a given element are identical in mass and properties.

The explanation for this modification is that isotopes are atoms of the same element that have different numbers of neutrons, resulting in different atomic masses while still maintaining the same chemical properties.

This means that not all atoms of a given element are identical in mass, as Dalton's original atomic theory suggested.

In summary, the discovery of isotopes modified Dalton's postulate about the identical nature of atoms of a given element, as isotopes have different atomic masses but still share the same chemical properties.

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First of all, Z is unknown. I hope it is a mistake.

        Now, it is given that the element X has nineteen electrons. This proves that X is actually Potassium.

        As per the periodic table, both Potassium and Lithium belongs to group 1 as their valency is 1 because of the presence of only one electron in the outermost shell of electrons i.e., they lose an electron during a chemical reaction to form a stable compound. Furthermore, both are metallic.

        Magnesium belongs to group 2 and hence its valency is two, which is different from potassium though it is metallic. Similiarly, bromine belongs to group 17 and gains one electron during a reaction in contrast to potassium.

( No internal links available for reference. For clarification, check the periodic table).

Answer:

22g of copper?

Explanation:

Answer:

A

Explanation:

The chemical reaction is a rearrangement of atoms: In the previous postulate, Dalton proposed that chemical processes neither destroy nor generate atoms. They just rearranged the atoms. Taking our salt example again, whenever sodium combines with chlorine to form salt, both the sodium and chlorine atoms remain.

What is a chemical reaction?

A chemical reaction is a process that results in the chemical change of one set of chemical components into another.  Chemical reactions are changes that simply affect the locations of electrons in the formation and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and may typically be represented using a chemical equation. Nuclear chemistry is a branch of chemistry that studies the chemical interactions of unstable and radioactive materials in which both electronic and nuclear changes can occur.

According to the Daltons atomic theory the chemical reaction will be resulting in the rearranging of the atoms of the compound.

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Answer:

0.694 cents per second

Explanation:

25x100=2500 cents per hour, 2500/60 = 41.67 per minute and 41.67/60=0.694 cents per second