A complete reaction indicated by the chemical equation below produces 79.0 g of sulfur. Estimate the number of hydrogen atoms found in the amount of water that forms as a second product in this reaction.

2 H2S(g) + SO2(g) → 3 S(s) + 2 H2O(l)

a. 1.98 × 10^24 atoms
b. 4.80 × 10^23 atoms
c. 6.40 × 10^25 atoms
d. 1.02 × 10^26 atoms
e. 3.00 × 10^24 atoms

Answer:

C is the false one atoms contain chemical bonds

Answer:

C. Atoms contain chemical bonds.

Reason:

Atoms don't have any chemical bonds. Molecules are the particles have chemical bonds.

The median reaction at the second end point in the HCl and NaOH titration is: HCl + NaOH → NaCl + H2O

In a titration between hydrochloric acid (HCl) and sodium hydroxide (NaOH), the reaction involved is the neutralization reaction between an acid and a base. The balanced equation for this reaction is:

HCl + NaOH → NaCl + H2O

In this reaction, one mole of HCl reacts with one mole of NaOH to form one mole of NaCl (sodium chloride) and one mole of water.

During the titration process, the reaction occurs gradually as the base is added to the acid solution.

The first end point of the titration is reached when the moles of HCl and NaOH are stoichiometrically equivalent, meaning they react in a 1:1 ratio. At this point, all the HCl has been neutralized by the NaOH, and no excess of either reagent remains.

However, if the titration is continued beyond the first end point, the reaction between HCl and NaOH can still occur, albeit in a different ratio.

The second end point refers to the point where the moles of NaOH added exceed the stoichiometrically required amount to neutralize the HCl completely. As a result, any excess NaOH added after the second end point reacts with the excess HCl in a 1:1 ratio.

Therefore, the median reaction at the second end point in the HCl and NaOH titration is:

HCl + NaOH → NaCl + H2O

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These liquids can be separated by the process of distillation because the 2-propanol and water option B) have combined physically and have the same boiling point.

A bottle of rubbing alcohol contains both 2-propanol and water.

These liquids can be separated by the process of distillation because the 2-propanol and water have combined physically and retain their different boiling points.

The process of separating two miscible liquids with different boiling points is called distillation.

The procedure is based on the idea that the liquids have various boiling points.

Thus, during the boiling process, one of the fluids vaporizes faster than the other, and that vapor is then collected and allowed to condense, producing pure liquid.

Alcohol and water are examples of two miscible liquids that can be separated by distillation.

The process of distillation operates on the fact that the liquid with the lowest boiling point is vaporized first.

Alcohol has a lower boiling point than water, so alcohol is vaporized first in distillation, leaving the water behind.

A bottle of rubbing alcohol contains both 2-propanol and water.

These liquids can be separated by the process of distillation because the 2-propanol and water have combined physically and retain their different boiling points.

This means that 2-propanol and water are physically combined; that is, they do not form any new chemical bonds with each other.

Consequently, the molecules of the substances remain separate from each other.

Furthermore, both water and 2-propanol have various boiling points.

The boiling point of 2-propanol is 82.6 °C, while that of water is 100 °C. Thus, they can be separated using distillation.

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This problem is asking for the consumption of silver ions when silver nitrate is reacted with copper. In such a case, since no masses are given, we can use the following from similar problems:

Mass of empty beaker: 110.000 g

Mass of beaker with silver nitrate (after all additions) and copper: 331.634 g.

Mass of beaker with silver: 113.395 g.

This means we can write the following chemical equation:

\(Cu+2AgNO_3\rightarrow Cu(NO_3)_2+2Ag\)

And thus calculate the mass of silver nitrate that will produce the following mass of silver:

\(m_{Ag}^{produced}=113.395g-110.000g=3.395g\)

Next, we use the 2:2 mole ratio of silver to silver nitrate (silver ions source):

\(3.395gAg*\frac{1molAg}{107.87gAg}*\frac{2molAgNO_3}{2molAg} *\frac{169.87gAgNO_3}{1molAgNO_3} = 5.35gAgNO_3\)

The step will be defined for the given mass of available silver nitrate which will be compared to 5.35 g (consumed mass) to see if they are the same (all consumed) or different (partial consumption).

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Answer:

yes and no tbh

Explanation:

Answer:

Dew is liquid water droplets that form on grass, spider webs, and other things in the early morning or late evening. ... That means it turns from a liquid into a gas called "water vapor." When evening comes, the warm ground continues to radiate heat into

Answer:

The various sources of such errors are given below.

Explanation:

So that the percentage of someone specific produces heat exploratory value systems inaccuracies can be somewhat massive.

The concentration of H₂SO₄ solution is equal to 0.0480 M.

A neutralization reaction is described as a chemical reaction where acid and base react to produce respective salt and water. When a strong acid reacts with a strong base then the salt can be neutral.

When H₂SO₄ (a strong acid) reacts with NaOH, the resulting salt is Na₂SO₃  and water.

H₂SO₄  +  2 NaOH   →   Na₂SO₄  +   2H₂O

Given, the concentration of NaOH = 0.146 M

The volume of the NaOH = 14.85 ml = 0.01485 L

The number of moles of NaOH, n = M × V = 0.146 × 0.01485 = 0.00216 M

The volume of the  H₂SO₄ = 22.55 ml = 0.02255 L

The number of moles of  H₂SO₄, n = 0.00216/2 = 0.00108 mol

The concentration of H₂SO₄ =0.00108/0.02255 = 0.0480 M

Therefore, the molarity of  H₂SO₄ is 0.0480 M.

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Yes, we can conclude that a white solid that weighs 105.5 mg and is presumed to be cocaine (C₁₇H₂₁NO₄) produces 279.3 mg of CO2 and 66.46 mg of water upon combustion.

Cocaine is a tropane alkaloid that has both local and central nervous system (CNS) stimulating effects. Cocaine inhibits the re-uptake of dopamine, serotonin, and norepinephrine into pre-synaptic neurons by binding to the transport proteins for these neurotransmitters. The salt form of cocaine is called cocaine hydrochloride. The taste is bitter and numbing, and it is a fine white powder.

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The complete question is -

A 105.5mg sample of a white substance, suspected of being cocaine (C17H21NO4), forms 279.3mg of CO2 and 66.46mg of water on combustion. Chemical analysis shows that the compound contains 4.68% N by mass. Would you conclude that the white solid is cocaine?​

Answer:

\(\Delta G=-675.38 \frac{kJ}{mol}\)

Explanation:

Hello!

In this case, for this problem, it is possible to use the thermodynamic definition of the Gibbs free energy:

\(\Delta G=\Delta H-T\Delta S\)

Whereas G, H and S can be assumed as constant over T; thus, we can calculate H at 135.4 °C:

\(\Delta H=\Delta G+T\Delta S\\\\\Delta H=-775.41\frac{kJ}{mol}+(135.4+273.15)K*(0.81791\frac{kJ}{mol*K} )\\\\\Delta H=-441.58\frac{kJ}{mol}\)

Now, we can calculate the Gibbs free energy at 12.7 °C as shown below:

\(\Delta G=-441.58\frac{kJ}{mol} -(12.7+273.15)K*0.81791\frac{kJ}{mol*K}\\\\\Delta G=-675.38 \frac{kJ}{mol}\)

Best regards!

The correct answer would be 0.034 g/L.

What we are trying to do here is to convert from milligram to gram and from deciliter to liter.

First, let's do the milligram to gram conversion.

1 mg = 0.001 g

Therefore,

3.4 mg = 3.4 x 0.001 = 0.0034 g

In order to convert from deciliter to liter.

1 deciliter = 0.1 L

Thus, 3.4 mg/dL = 0.0034g/0.1 L = 0.034 g/L

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A substance should be heated for: option C and D

Conductivity is a measure of a material's ability to conduct electrical current. It is the property of a material to allow the flow of electric charges through it. The conductivity of a material is determined by the number of free electrons it has, as well as the mobility of those electrons.

The appropriate heating time for a substance on a hot plate would depend on a variety of factors, including the specific substance being heated, the desired temperature, and the equipment being used. The heating time may also vary depending on whether the substance is being melted or simply heated for another purpose.

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the answer is

8.97×10^-3

Rearranging the equation, mole molecular weight = mass, mass = molecular weight mole, and mole = mass / mol (multiply all sides by molecular weight).

Molecular formula: What is it?

The quantity of each element's atoms in one molecules of a chemical is expressed by the molecular formula. The formula that displays the precise figure of each atom within a molecule is known as a molecular formula. The Chemical Formula is determined using the empirical method whenever the molecular mass value is known. n = molar mass/empirical mass

Is access to Molecular Pharmaceutics open?

The cOAlition S has recognized Molecular Pharmaceutics as a transformational publication, pledging to make the switch to 100% accessibility in the future. Your open access fees may be funded by your sponsor through Dec 31, 2024, if your researcher funder have signed Plan S. For further details, kindly visit the ACS Scientific website.

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Answer:

12

Explanation:

Because it is pH and pOH, you can use the relationship of 14-pH=pOH, or 14-pOH=pH. Using this you should get the pOH to be 12.

The partial pressure of hydrogen gas in the collected gas is 746 torr.

To determine the partial pressure of hydrogen gas in the collected gas, we need to consider the difference between the total pressure of the collected gas and the vapor pressure of water at the given temperature. The partial pressure of hydrogen gas is the pressure exerted by hydrogen alone.

Given information:

Total pressure of the collected gas (Ptotal) = 767 torr

Vapor pressure of water (Pwater) = 21.0 torr

The partial pressure of hydrogen gas (Phydrogen) can be calculated using Dalton's law of partial pressures, which states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of each individual gas.

Phydrogen = Ptotal - Pwater

Plugging in the given values:

Phydrogen = 767 torr - 21.0 torr

Phydrogen = 746 torr

Therefore, the partial pressure of hydrogen gas in the collected gas is 746 torr.

It's important to note that in this calculation, we assume that the water vapor does not react with or dissolve in the hydrogen gas and that the gases behave ideally. Additionally, it's assumed that the collected gas is dry, meaning all the water vapor has been removed or does not significantly contribute to the total pressure.

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Answer:

Observation

Explanation:

Observation is the first step in scientific method. First of all you observe anything or any activity.

Then you think about how it is going this way. If it happens so and so what will happen... then perform experiments. Etc

Observation

Hypothesis

Theory

Experiments

Law

When hydrogen bromide (HBr) is added to 2-methylbut-2-ene ((CH3)2CCHCH3), an electrophilic addition reaction takes place, where the π bond of the alkene is broken, and the hydrogen and bromine atoms are added to the resulting carbocation.

The reaction proceeds through a Markovnikov addition, where the hydrogen atom attaches to the carbon atom with the greater number of hydrogen atoms.

In this case, the initial addition of HBr to 2-methylbut-2-ene leads to the formation of a primary carbocation, as the positively charged carbon atom only has one alkyl group attached to it. The primary carbocation is relatively unstable, and it can undergo a rearrangement to form a more stable secondary carbocation.

The major product that is typically obtained is the 2-bromo-2-methylbutane. The hydrogen atom from HBr adds to the carbon with three hydrogen atoms (the more substituted carbon), resulting in the formation of a secondary carbocation.

On the other hand, a minor product is also formed, which is 3-bromo-2-methylbutane. This product arises from the addition of HBr to the primary carbocation, which is less stable. Although the primary carbocation is less favored, it can still be formed and lead to the formation of the minor product.

In summary, the addition of HBr to 2-methylbut-2-ene yields two products: the major product is 2-bromo-2-methylbutane, resulting from the addition of HBr to the more stable secondary carbocation, and the minor product is 3-bromo-2-methylbutane, originating from the less stable primary carbocation.

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The temperature of the gas is 0.49 K.

An ideal gas is a theoretical gas composed of many randomly transferring factor particles that aren't difficult to interparticle interactions. the best gasoline idea is beneficial because it obeys the precise gas law, a simplified equation of country, and is amenable to evaluation under statistical mechanics.

Volume is a degree of occupied three-dimensional space. it's far more frequently quantified numerically the usage of SI-derived gadgets or by way of diverse imperial gadgets. The definition of length is interrelated with the extent.

An ideal gas is described as one for which both the extent of molecules and forces between the molecules are so small that they have got no effect at the behavior of the gas. The real gas that acts almost like a really perfect gasoline is helium. that is due to the fact helium, in contrast to maximum gases, exists as an unmarried atom, which makes the van der Waals dispersion forces as low as viable

Using the ideal gas equation:-

Given;

P₁ = 387 torr = 0.509211 atm

V₁ =  2 L

mole n = 0.25 mol

T = ?

R = 8.314

PV = nRT

T = PV /nR

   = 0.509211 × 2 / 0.25 × 8.314

   = 0.49 K

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The "Wakanda speech," six weeks have passed, and the world is still in shock.

Thus, Global leaders and analysts were taken aback by King T'Challa's declaration at the United Nations General Assembly that the Kingdom of Wakanda is not a developing country of textiles, farms, and shepherds with a GDP per person of roughly $760 but rather a technological superpower and Wakanda speech.

The country's widespread employment of cutting-edge magnetic levitation trains, flying machines, opaque holograms, and spinal cord-healing beads has led to the coining of the phrase "uber-developed" nation.

The most watched video ever is currently "Welcome to the Future," an introduction video created by Wakanda's recently established Ministry of Foreign Affairs.

Thus, The "Wakanda speech," six weeks have passed, and the world is still in shock.

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Answer: False

Explanation: Some animals have to move to different places maybe because their habitat is destroyed or they aren’t comfortable with it.

Answer:

Here the oxidizing agent is Mg and the reducing agent is the O2.

This is because Mg is getting taking in O and is reducing itself to form MgO.

This Magnesium oxide, or magnesia, so formed is a white hygroscopic solid mineral that occurs naturally as percales and is a source of magnesium.

Explanation:

Answer:

The answer to your question is given below

Explanation:

The balanced equation for the reaction is given below:

CaO(s) + CH4(g) + 2H2O(g) <=> CaCO3(s) + 4H2(g)

1. Writing an expression for the equilibrium constant, K.

The equilibrium constant, K for a reaction is simply the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient.

Thus, we can write the equilibrium constant, K for the reaction as follow:

CaO(s) + CH4(g) + 2H2O(g) <=> CaCO3(s) + 4H2(g)

K = [CaCO3] [H2]⁴ / [CaO] [CH4] [H2O]²

2. Based on the value of K, more products will be in the equilibrium mixture since the value of K is a positive large number.

Answer:

Na has 1 atom

O has 1 atom

H has 1 atom

therefore,

total atoms = 3

The percent by mass of the chromium is 32.1 %.

The term percent by mass has to do with the ratio of the mass of a particular component of the component to the total mass of the compound multiplied by hundred. Let us recall that a percent must involve hundred.

Now we have;

Mass of Cr = 16.05

Total mass of the sample = 50 g

We now have;

Mass of Cr/ Total mass * 100/1

= 16.05/50 g  * 100/1

= 32.1 %

Hence, from the total sample, we have about 32.1 % of chromium.

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O=O is not a compound.

A compound consist of two different molecule at least.

Here same atom of oxygen is present in the molecule.

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There are approximately 1.62 x 10^25 water molecules in the 499.8 mL bottle of water.

To determine the number of water molecules in the given volume of water, we need to use the relationship between mass, volume, and molar mass of water.

First, we need to find the mass of water in the bottle:

Mass = Density * Volume

Mass = 0.967 g/mL * 499.8 mL = 483.9 g

Next, we need to convert the mass of water to moles using the molar mass of water. The molar mass of water (H2O) is approximately 18.015 g/mol.

Moles = Mass / Molar mass

Moles = 483.9 g / 18.015 g/mol = 26.88 mol

Finally, we can calculate the number of water molecules using Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of molecules = Moles * Avogadro's number

Number of molecules = 26.88 mol * (6.022 x 10^23 molecules/mol) = 1.62 x 10^25 molecules

Therefore, there are approximately 1.62 x 10^25 water molecules in the 499.8 mL bottle of water.

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The energy in joules of a photon that has a frequency of 7.49 × 10¹⁴ s⁻¹ is 4.963 × 10-²¹ J.

The energy of a photon or light wave can be calculated using the following formula:

E = hf

Where;

According to this question, the frequency a photon is given as 7.49 × 10¹⁴ s⁻¹ where the Planck's constant (h) is 6.626 × 10⁻³⁴ J • s. The energy can be calculated as follows:

E = 7.49 × 10¹⁴ × 6.626 × 10⁻³⁴

E = 4.963 × 10-²¹ J

Therefore, the energy in joules of a photon that has a frequency of 7.49 × 10¹⁴ s⁻¹ is 4.963 × 10-²¹ J.

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Answer:

0.99 μmol/L

Explanation:

From the question given above, the following data were obtained:

Volume of stock solution (V₁) = 20 mL

Concentration of stock solution (C₁) = 18.8 μmol/L

Volume of diluted solution (V₂) = 380 mL

Concentration of diluted solution (C₂) =?

The concentration of the diluted solution can be obtained as follow:

C₁V₁ = C₂V₂

18.8 × 20 = C₂ × 380

376 = C₂ × 380

Divide both side by 380

C₂ = 376 / 380

C₂ = 0.99 μmol/L

Therefore, the concentration of the diluted solution the chemist is working on is 0.99 μmol/L