Volume → Mass Problems (L of A → mols A → mols B → g of B)Ammonium nitrate is a common ingredient in chemical fertilizers. Use the reaction shown to calculate the mass of solid ammonium nitrate that must be used to obtain 0.500 L of dinitrogen monoxide gas at STP. NH4NO3(s) ⇨ N2O(g) + 2H2O(g)

Answer:

its A

Explanation:

The only one that makes sense

a. As per the balanced reaction, 2 moles of hexane gives 12 moles of carbon dioxide. Then, 7.77 moles of hexane will give 46.2 moles of carbon dioxide.

Combustion is an exothermic reaction in which a gas reacts with oxygen to give carbon dioxide and water. Given the combustion reaction of hexane gas.

b. molar mass of hexane = 86 g/mol

no.of moles in 8.11 g = 8.11 /86 = 0.094 g

2 moles of hexane gives 12 moles of carbon dioxide. Then 0.094 moles of hexane will give

0.094 × 12/2 = 0.56 moles

molar mass of carbon dioxide = 44 g/mol

then, mass of 0.56 moles = 0.56 × 44 = 24.6 g

c. 2 moles of hexane reacts with 19 moles of oxygen gas. Then, 25 moles of hexane needs to reacts with 237.5 moles of oxygen gas.

mass of oxygen gas = 32 g/mol

mass of 237.5 moles = 32 × 237.5 = 7600 g of oxygen is needed.

d. 2 moles of hexane gives 14 moles of water vapor. That is 172 g of hexane gives (18 × 14) 252 g of water.

then, 55.3 kg of hexane gives:

(55.3 kg × 0.252 kg)/0.172 kg = 81 kg.

Therefore, 81 kg of water vapor is produced from 55.3 kg of hexane.

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The section that represents the phase of water with the highest kinetic energy is the gas phase or vapor phase.

Gas phase or vapor phase section is above the boiling point curve, which separates the liquid and gas phases. At this point, the temperature is at or above 100°C (at standard atmospheric pressure), and the kinetic energy of the water molecules is sufficient to overcome the intermolecular forces holding them in the liquid phase and escape into the gas phase. The gas phase has the highest kinetic energy because the water molecules in this phase are more widely separated and move more rapidly than in the liquid or solid phases. The gas phase is also characterized by the highest entropy or disorder, as the molecules are free to move in any direction and occupy a large volume. The section that represents the phase of water with the highest kinetic energy is  gas phase or vapor phase.

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The molarity of the sodium hydroxide solution is 0.09111 M.

What is Molarity?

Molarity is a measure of the concentration of a solution. It is defined as the number of moles of solute dissolved in one liter of solution.

Molarity is an important concept in chemistry because it allows us to quantify the amount of solute in a solution and to make predictions about the behavior of the solution in various chemical reactions.

First, we can calculate the number of moles of potassium hydrogen phthalate using its molecular weight:

moles of KHP = mass / molecular weight

moles of KHP = 0.600 g / 204.22 g/mol

moles of KHP = 0.002938 mol

Since one mole of KHP reacts with one mole of NaOH, we know that there are also 0.002938 moles of NaOH in the titrated solution. We can calculate the molarity of the NaOH solution using the formula:

molarity = moles of solute / volume of solution (in liters)

First, we need to convert the volume of the NaOH solution from milliliters to liters:

volume of NaOH solution = 32.21 mL = 0.03221 L

Now we can calculate the molarity of the NaOH solution:

molarity = 0.002938 mol / 0.03221 L

molarity = 0.09111 M

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Answer:

\( 4.69135802 \times {10}^{ - 9} \)

Explanation:

\(3.8 \times {10}^{ - 5} \div 8.1 \times {10}^{3} \\ \\ = \frac{3.8 \times {10}^{ - 5} }{8.1 \times {10}^{3}} \\ \\ = 0.469135802 \times {10}^{ - 5} \times {10}^{ - 3} \\ \\ = 0.469135802 \times {10}^{ - 8} \\ \\ = 4.69135802 \times {10}^{ - 9} \)

Answer:

4.69135802x10^-9

Explanation:

This is easy

Answer:

Jet ğıpep2pep2p2pp3oroe88r82

One of the most significant characteristics of the Dead Sea is its salinity level. The images show the rock salt deposits on the shore.

The dead dea is the most salty landlocked lake on the Earth surface. It is located in the middle East, between Israel and Jordania. Its nort-south length is about 80 km and its east-west wide varies between 7 and 20 km.

The Jordan river is the most significan afluent on the Dead Sea, from which it receives most of its water.

The Dead Sea is the deepest and lowest water body on the Earth, being its surface level 400 mt below the sea level.

Due to different reasons, during the last decades, there was a sharp and continuous drop in the water level. For this reason the lake surface is decreasing year after year.

Among its many characteristics, one of them -and probably the most notorious one- is the salinity.  The percentage of dissolved salts in the lake is much higher than the one recorded in the oceans, seas or lakes of the globe. Its value is between 8 and 10 times higher the salt level of oceans.

The salts present in the lake are chlorine, magnesium, sodium, calcium, potassium, bromine and sulfur. Their concentration vary according to the strate and deph, but it tends to increase toward the lake’s bottom. The high salinity level provides an oily aspect, bleach taste, and extreme density.

Several rock salt deposits can be seen on the shore and near it. Salt columns can also be seen in deepest areas. These structures are becomming more common with time, as water evaporates, water provision from afluent sources decreases, and salinity near the surface increases.

Mainly due to the extreme salt level, which turns to be lethal, almost no forms of life inhabit these waters. Only some bacteria species and one algae species can be found in the water, and some plant species near the coasts.

What we can observe in these images are the rock salt deposits on the shore.

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The mass (in grams) of propane that will be required, assuming all the heat from the combustion reaction is absorbed by the pork is 36.56 grams

The mass of propane that will be required can be obtain as illustrated below:

C₃H₈(g) + 5O₂(g) → 3CO₂(g) + 4H₂O(g)  ΔH = –2046 KJ

From the balanced equation above,

2046 KJ of heat energy required 44 g of propane, C₃H₈

Therefore,

1.7×10³ KJ of heat energy will require = (1.7×10³ KJ × 44 g) / 2046 KJ = 36.56 g of propane, C₃H₈

Thus, we can conclude that the mass of propane, C₃H₈ required is 36.56 grams

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Answer:

What is the mole fraction of sulfuric acid in a solution containing 98% sulfuric by mass?

What is the mole fraction of H2SO4 in a 98% aqueous H2SO4 solution?

Here given..

98 % of H2SO4 that means 98 g of H2SO4 is there in 100 g of aq. H2SO4 solution.

So.

Mass of solute = 98 g

Mass of solvent = 2 g (as water is considered as universal solvent)

Molar mass of solute = 98 g

Molar mass of solvent = 18 g

No of moles of solute = 1 mole (no of moles = given mass / molar mass)

No of moles of solvent = 2/18 = 1/9 moles

And ,

We know formula for mole fraction is..

x( of solute) = Moles of solute/(moles of solute + moles of solvent)

x (of solute) = 1/(1+(1/9)) = 0.9

x (of solvent) = 1 - 0.9 = 0.1

Explanation:

it is just number 1

Answer: State of matter, Subcategory in the metal-metalloid-nonmetal trend, and electrons per shell.

Explanation:

Answer: The answer is liquid

Explanation:

The state of matter consists of particles that are close together in a random pattern is liquid . Hence , Option (B) is correct.

When energy is added or removed to matter, it changes state to form a state of matter.

A state of matter is defined as one of the ways in which matter can interact with itself to form a homogeneous phase.

Therefore , The state of matter consists of particles that are close together in a random pattern is liquid . Hence , Option (B) is correct.

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Answer:

the answer is calcium

Explanation:

There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Option E is correct option.

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet. Out of given options, calcium element could be used in industry to control electron flow. Calcium belongs to alkaline earth metals that is group 2 of periodic table.

Therefore, the correct option is option E.

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Answer:

c

Explanation:

The whole number mole ratio of LiCIO₄ to H₂O in the sample of the compound is 1 : 3.

The mole ratio of the reaction is the ratio in which moles of reactants combine to form moles of product.

The mole ratio of the given reaction is calculated below as follows:

Moles of LiCIO₄ present in the sample of the compound = 0.0449 mole LiCIO₄

Moles of H₂O present in the sample of the compound = 0.135 mol H₂O

To get the whole number mole ratio, we divide each mole of substance present in the sample by the smallest number of moles.

Mole ratio of  LiCIO₄ = 0.0449 mole / 0.0449 mole

Mole ratio of  LiCIO₄ = 1

Mole ratio of  H₂O = 0.135 / 0.0449

Mole ratio of  H₂O = 3

Hence mole ratio of  LiCIO₄ to H₂O in the sample = 1 : 3

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Answer:

The true statement concerning visible light and electromagnetic radiation is considered to be - d. Visible light is a small portion of the electromagnetic spectrum.

The electromagnetic spectrum is the range of frequencies of electromagnetic waves or radiations. This spectrum also gives an idea about the wavelengths of electromagnetic radiations. The part of the spectrum on their higher to lower energy or frequency range from  Hz to  Hz are:

gamma rays

X-rays

ultraviolet radiation

visible light

infrared radiation

radio waves.

The visible light is the very small part of the electromagnetic spectrum that ranges from the to, Visible light is the light that the human eye can see.

Thus, the correct answer is- option d.

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Explanation:

i did this

Answer:

A mixture of 3 moles of N2, 5 moles of CO2, and 10moles of Cl2 exert a total pressure of 1120 mmHg. What is the partial pressure of CO2?

Explanation:

According to Dalton's law of partial pressures:

The partial pressure of a gas can be determined by using the formula:

\(the partial pressure of a gas = mole fraction of the gas * total pressure\)

Partial pressure of CO2:

\(partial pressure of CO2= total pressure * mole fraction of CO2\\\\Mole fraction of CO2=\frac{number of moles of CO2}{total number of moles of all the gases} \\mole fraction of CO2=\frac{5mol}{3mol+5mol+10mol} = 5/18\\Partial pressure of CO2=\frac{5}{18} * 1120mmHg\\ =311.1mmHg\)

Hence, the partial pressure of CO2 is 311.1mmHg.

First, we need to know that calcium oxide is CaO and it decomposes to form Ca and O₂. So the balanced equation is:

2 CaO(s) ---> 2 Ca(s) + O₂(g)

Answer: 2 CaO(s) ---> 2 Ca(s) + O₂(g)

The nonessential saturated fatty acid with four double bonds is called Palmitoleic Acid, and its structural formula is CH₃(CH₂)₅CH=CH(CH₂)₇COOH. Its IUPAC name is (Z)-hexadec-9-enoic acid.

Nonessential saturated fatty acids are fatty acids that can be synthesized by the human body and are not required to be obtained from the diet. The human body has the ability to produce these fatty acids through de novo synthesis.

The structure of a nonessential saturated fatty acid with four double bonds is as follows:

Name: Palmitoleic Acid

Structural Formula: CH₃(CH₂)₅CH=CH(CH₂)₇COOH

IUPAC Name: (Z)-hexadec-9-enoic acid

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Answer:

\(^{127}_{53} I\)

53 protons and electrons and 74 neutrons.

Explanation:

Hello!

In this case, since the nuclide symbol of an isotope is represented by putting the atomic mass as a prefixed superscript and the number of protons as a prefixed subscript, for I-127 we have:

\(^{127}_{53} I\)

Now we realize this isotope have 53 electrons and protons and the following number of neutrons:

\(neutrons= 127-53=74\)

Notice this isotope has about the same molar mass of the average iodine atom.

Best regards!

Answer:cathode

Explanation:It is also known as the galvanic cell or electrochemical cell. In the voltaic cell, the oxidation occurs at an anode which is a negative electrode and the reduction occurs at the cathode which is a positive electrode.

Answer: The theoretical yield of potassium chloride is 0.596 grams and the % Yield of potassium chloride is 83.9%

Explanation:

To calculate the moles :

\(\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}\)    

\(\text{Moles of} KClO_3=\frac{1.00g}{122.5g/mol}=0.008moles\)  

\(2KClO_3\rightarrow 2KCl+3O_2\)  

According to stoichiometry :

2 moles of \(KClO_3\) produce= 2 moles of \(KCl\)

Thus 0.008 moles of \(KClO_3\) will produce=\(\frac{2}{2}\times 0.008=0.008moles\)  of \(KCl\)

Theoretical yield of \(KCl=moles\times {\text {Molar mass}}=0.008moles\times 74.5g/mol=0.596g\)

% yield = \(\frac{\text {Actual yield}}{\text {Theoretical yield}}\times 100=\frac{0.500g}{0.596g}\times 100\%=83.9\%\)

The theoretical yield of potassium chloride is 0.596 grams and the % Yield of potassium chloride is 83.9%

Answer:

its group A

Explanation:

Answer:

Explanation:

If a zero is found between significant digits, it is significant

A positive charge is a property that best describes a proton. A proton is made up of three smaller particles called quarks.

Characteristics of a proton :

1. A proton is located inside the nucleus sometimes bounded together by nuclear forces along with neutrons.

2. A proton carries a charge of 1.6 x 10^-19 Coulomb. One Coulomb constitutes approximately 6.241 x 10^18 protons.

3. A proton has a mass of 1.67262 x 10^-27 kg or approximately 1 a.m.u It is almost equal to that of a hydrogen atom as its nucleus only consists of one proton and the rest of the atom constitutes one electron whose mass is nearly negligible.

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Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that help them together.After the salt compounds are pulled apart ,the sodium and chloride atoms are surrounded by water molecules,as this diagram shows.Once this happens,the salt is desolved,resulting in a homogeneous solution