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How many grams of hydrogen gas will be produced if you start with 15.0 grams of zinc and an excess amount of HCI?

balanced equation:
Zn + 2HCI = ZnCl2 + H2

Answer

1 atm

Explanation

Given:

V₁ = 5 L P₁ = 0.5 atm V₂ = 2.5 L P₂ = ?

According to Boyle's law, the pressure (P) of a given quantity of gas varies inversely with its volume (V) at constant temperature; i.e., in equation form,

P₁V₁ = P₂V₂

So substitute the given values into the equation to get P₂

0.5 atm x 5 L = P₂ x 2.5 L

2.5 atm.L = P₂ 2.5 L

Divide both sides by 2.5 L

The correct answer is B. 8 molecules \(SO_3\). Option B

In the given reaction:

S(s) + \(O_2\)(g) → \(SO_3\)(g)

The stoichiometric coefficient in front of the \(SO_3\)molecule is 8, which indicates that 8 molecules of \(SO_3\)are formed as a product. This coefficient represents the ratio of the number of molecules involved in the reaction.

Option A (8 atoms \(SO_3\)) is incorrect because it only mentions the number of atoms, not molecules. The stoichiometric coefficient does not represent the number of atoms, but rather the number of molecules.

Option C (80.07g \(SO_3\)) is incorrect because it mentions a specific mass. The stoichiometric coefficient does not directly represent the mass of the substance, but rather the relative amount of molecules involved in the reaction.

Option D (32 \(SO_3\)) is incorrect because it mentions a specific volume. The stoichiometric coefficient does not directly represent the volume of the substance, but rather the relative amount of molecules involved in the reaction.

Therefore, the correct way to describe the \(SO_3\)component in the reaction is option B: 8 molecules \(SO_3\). This represents the ratio of the number of molecules of \(SO_3\)that are produced in the reaction.

Option B

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The final temperature of the sample of nitrogen dioxide gas that occupies 625 cm³ at 70.0 °C and 15.0 psi is 299.12K.

The temperature of a gas can be calculated by using the combined gas law formula as follows:

P₁V₁/T₁ = P₂V₂/T₂

Where;

According to this question, a sample of nitrogen dioxide gas occupies 625cm³ at 70.0 °C and 15.0 psi. The final temperature can be calculated as follows:

15 × 625/343 = 15 × 545/T

27.33T = 8175

T = 299.12K

Therefore, 299.12K is the final temperature of the sample of nitrogen dioxide gas.

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Answer:

Lithium has more electrons than Hydrogen

Explanation:

Lithium has 2,1 electrons
Hydrogen has 1 electrons

number 1 is...

Explanation:

B (i think)

The type of movement that occurs in the plate movement listed above include the following:

These are gigantic pieces of the Earth's crust and uppermost mantle and are made up of oceanic crust and continental crust.

A convergent boundary as the name implies occurs when lithospheric plates are moving towards one another.

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Answer:

Explanation:

I'd say art

The mass of krypton tetrachloride that can be produced assuming 100% yield is mathematically given as

molar mass=33.29g

Generally, the equation for ideal gas is mathematically given as

PV=nRT

Therefore

n=(0.50)(15.)/0.082*623

n=0.147mol

Hence for clorine

n=0.441mol

Given the reaction

Kr+2cl2---->KrCL4

Hence

molar mass=225.60*0.147

molar mass=33.29g

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Ideal gas law is valid only for ideal gas not for vanderwaal gas. To solve such, we need to know the relation between rate of effusion and molar mass of gases. Therefore, the new volume V₂ is 18L.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature. an ideal gas on the walls of the container is inversely proportional to the volume occupied that gas.

Mathematically, Boyle's law can be written as

P₁V₁ = P₂V₂

P₁=initial pressure=342 torr

P₂=final pressure=1710 torr

V₁ = initial volume= 29.0 L

V₂=final pressure=?

Substituting all the given values in the above equation, we get

V₂ = P₁V₁/P₂

V₂ = (342 × 29.0)/1710

V₂ = 18L

Therefore, the new volume V₂ is  18L.

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At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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2 moles N

2 moles H

3 moles O

Given

The compound is probably NH₂NO₃

Required

The number of moles

Solution

there are 2 N in  NH₂NO₃, so moles N = 2moles

there are 2 H in  NH₂NO₃, so moles H = 2moles

there are 3 O in  NH₂NO₃, so moles O = 3 moles

Answer:

N=2 moles

H=4 moles

O=3 moles

Explanation: just did it on edg

Answer:

\(Kb=6.16x10^{-7}\)

Explanation:

Hello,

In this case, given the pH of the base, we can compute the pOH as shown below:

\(pOH=14-pH=14-10.781=3.219\)

Next, we compute the concentration of the hydroxyl ions when the triethanolamine is dissociated:

\(pOH=-log([OH^-])\)

\([OH^-]=10^{-pOH}=10^{-3.219}=6.04x10^{-4}M\)

Then, by writing the equilibrium expression for the dissociation of triethanolamine we have:

\(Kb=\frac{[OH^-][C6H14O2N^+]}{[C6H15O3N ]}\)

That is suitable for the direct computation of Kb, knowing that based on the ICE procedure, \(x\) equals the concentration of hydroxyl ions that was previously, computed, therefore, we have:

\(Kb=\frac{6.04x10^{-4}M*6.04x10^{-4}M}{0.592M-6.04x10^{-4}M}\\ \\Kb=6.16x10^{-7}\)

Regards.

Explanation:

Answer:

11B

Explanation:

When 10B absorbs a neutron, it becomes the unstable isotope 11B, which quickly undergoes beta decay to form the stable isotope 11C. In this process, a neutron in the 10B nucleus is transformed into a proton, which increases the atomic number of the isotope from 5 to 6. The beta decay of 11B involves the emission of an electron (beta particle), which is produced when a neutron in the nucleus decays into a proton and an electron.

Answer and explanation:

To draw the Lewis structure we have to make sure that each element in the molecule has 8 electrons (Octet rule) in the valence shell, or 2 electrons in the hydrogen atom.

• PCl3:

In the PCl3 molecule, each chlorine atom has an Octet with 8 electrons, and the phosphorus atom also has an Octet but it is expanded (that means, that P atomd can have more that 8 electrons). From period 3 of the Periodic Table, elements can expand their octet and have more than 8 electrons.

• H2O2:

In the H2O2 molecule, oxygen atoms have an Octet with 8 electrons and hydrogen atoms have an Octet with 2 electrons.

• CH2Cl2:

In the CH2Cl2 molecule, all atoms have octets with 8 electrons, except for hydrogen, which has an octet with 2 electrons.

• H2CO2:

In this case, the Octet rule is fulfilled and also for this, an oxygen atom must form a double bond with the chlorine atom.

B) Al because the large difference between the third and forth ionization energies.

What is ionization energy?

Ionization energy (also called ionization potential) is the amount of energy required to remove an electron from an isolated atom or molecule in chemistry and physics. There is an ionization energy for each successively removed electron. However, the ionization energy associated with the removal of the first (most loosely held) electron is most commonly used.

The ionization energy of a chemical element, expressed in joules or electron volts, is usually measured in a discharge tube in which rapidly moving electrons produced by an electric current collide with gas atoms of the element, releasing one of them will be electronic.

B) Al because the large difference between the third and forth ionization energies.

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The mass (in grams) of fluorine the sample have is 2.91 g

First, we shall determine the mole of 9 grams of cobalt. Details below:

Mole = mass / molar mass

Mole of cobalt = 9 / 58.93

Mole of cobalt = 0.153 mole

Finally, we shall determine the mass of fluorine the present in the compound. Details below:

Mole = mass / molar mass

0.153 = Mass of fluorine / 19

Cross multiply

Mass of fluorine = 0.153 × 19

Mass of fluorine = 2.91 g

Thus, the mass of fluorine is 2.91 g

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Answer:

\(m_{sugar}=23.7g\ sugar\)

Explanation:

Hello,

In this case, we can first compute the volume of the sample in mL from the ounces:

\(8oz*\frac{29.5735mL}{1oz} =236.6mL\)

Thus, with the volume of the sample, we can compute the amount of sugar given the 10 g of sugar per 100 mL of soft drink as shown below:

\(m_{sugar}=236.6mL*\frac{10g\ sugar}{100mL}\\ \\m_{sugar}=23.7g\ sugar\)

Best regards.

Reaction spectator ions are absent  in displacement reaction

Spectator ion is an ion that exist as a reactant and a product in chemical reaction and a spectator ion do not participate in the reaction and present the same on both side of the reaction called spectator ion and the displacement reaction in which one element is replaces by another element in the compound and present the same at both side called as displacement and in that spectator ions are absent

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From the specific heat capacity of mercury, the amount of heat energy required to raise the temperature of 4.0 g of mercury metal from 9.3 °C to 83.0 °C is 77.792 J.

The specific heat capacity of a substance is the amount of heat required to raise the temperature of a unit mass of the substance by one degree Celsius or kelvin.

The specific heat capacity of a substance is a constant that can be used to calculate the amount of heat required to raise the temperature of a given mass of a substance to any temperature.

The specific heat capacity of mercury is 0.140 J/g/k.

The formula for calculating specific heat capacity is given below:

Specific heat capacity, c = Δq/mΔT

where;

Δq = heat change

m = mass of the substance

ΔT = temperature change

The Heat required, Δq, will then be:

Δq = m * c * ΔT

Heat required, Δq = 4.0 * 0.140 * (83.0 - 9.3)

Heat required, Δq = 77.792 J

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Answer:

i would also like to know

Explanation:

plz..............................................

In Atlanta, GA, certain seasons are associated with poorer air quality due to various factors such as weather conditions, human activities, and geographical location.

Typically, the seasons with the worst AQI in Atlanta, GA, are summer and early fall. This is primarily due to the combination of high temperatures, stagnant air masses, and increased pollution from various sources.

During the summer months, Atlanta experiences hot and humid weather, which can contribute to the formation of ground-level ozone. Ozone is a harmful pollutant that is created when pollutants from vehicles, power plants, and industrial activities react with sunlight and heat. High levels of ozone can cause respiratory issues and other health problems.

In addition to ozone, Atlanta also experiences increased levels of particulate matter (PM) during the summer and early fall. PM refers to tiny particles suspended in the air, which can come from sources such as vehicle exhaust, industrial emissions, and wildfires.

These particles can be inhaled into the lungs and can have detrimental effects on respiratory health.

It's important to note that air quality can vary from year to year and is influenced by various factors. Local regulations, weather patterns, and changes in pollutant emissions can all impact the AQI during different seasons.

Monitoring air quality reports and taking necessary precautions such as reducing outdoor activities during times of poor air quality can help individuals stay informed and protect their health.

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1. The constituent gases of air are:

2. The surrounding air is not seen with the eyes because it is transparent. Air molecules are not visible to the na-ked eye, and they do not scatter or absorb visible light significantly. Therefore, air appears colorless and transparent.

3. To prove that air supports burning, you can perform an experiment with a burning candle. Place a glass jar or bell jar over a lit candle, ensuring that the jar is airtight. As the candle burns, it consumes oxygen from the air inside the jar. Eventually, the candle flame will go out due to the lack of oxygen, proving that air (specifically oxygen) is necessary for burning.

4. To show that air occupies space, you can perform a simple experiment using a plastic bottle or syringe. Fill the bottle or syringe with water, ensuring there are no air bubbles. Then, cover the opening tightly and try to compress the air inside. You will find that it is not possible to compress the air significantly, indicating that air occupies space.

5. To prove that air has weight, you can use a sensitive balance or scale. Weigh an airtight container or balloon, and then fill it with air. The weight of the container or balloon with the added air will be greater than its initial weight, demonstrating that air has weight.

6. Air is useful to us in various ways. Three points highlighting the importance of air are:

7. Three properties of air include:

Air exerts force in various ways. For example, air pressure allows objects like airplanes to fly by providing lift. Air resistance or drag opposes the motion of objects moving through the air, creating a force that can affect their speed and trajectory.

8. Four effects of air pollution include:

9. Causes of pollution:

10. Two control measures for air pollution include:

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The answer is: The electronic configuration of Nitrogen is \(1s^22s^22p^3\).

Electronic configuration: The electronic configuration is defined as the distribution of electrons of an atom in the atomic or molecular orbitals and is written using the labels for the subshell.

How to decide which orbital is filled first?

(Shown in image)

         \(1s^22s^22p^3\)

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Nitrogen's complete electron configuration is 12s2s22p3.

The shorthand electron configuration for noble gases is [He] 2s22p3. Nitrogen has an atomic number of 7. The nitrogen atoms' nucleus contain this many protons. An atom that is neutral has an equal number of protons and electrons. Thus, the ground state electron configuration will consist of 7 electrons in the suitable s and p orbitals (state of lowest energy). For nitrogen, the entire electron configuration is 1s22s22p. Scientists may easily express and explain how the electrons are organized around the nitrogen atom's nucleus by using the configuration notation for nitrogen (N). As a result, it is simpler to comprehend and forecast how atoms will cooperate to form chemical bonds.

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Answer:

when the atom moves to the third energy level, its energy increases. However, when it goes back to the second energy level its overall energy decreases.

Explanation:

the smallest (or innermost) energy level has the least amount of energy and the largest (or outer most) level needs the most amount of energy. In order for the electron to move from one level to the other, it would need to match the energy of that level.

The question is incomplete, the complete question is;

A block is pulled 0.90 m to the right in 2.5 s. What is the blocks average speed to the nearest hundredth of a m/s

Answer:

0.36 m/s to the hundredth place

Explanation:

Now let us remember the definition of speed. Speed is defined in physics as distance/time.

Here we have the distance as 0.9 m

We have the time as 2.5 s

Hence the average speed is obtained from;

Speed = 0.9/2.5 = 0.36 m/s to the hundredth place

Answer: b. 322.5 mL

Explanation:assume constant pressure, then

693/(273.15+45) = v/(273.15-125)

v= 693*148.15/318.15 = 322.7

By using Charles law, the volume will be 322.5 mL

What is Charle's law?

The volume of such an ideal gas is proportional to its absolute temperature at constant pressure, according to Charles' law.

According to Charles law.

\(T_{1} / T_{2} = V_{1} / V_{2}\)

where, T is temperature and V is volume.

A substance or object's volume refers to the amount of 3D space it takes up.

Calculation of volume.

Given data:

V = 693 mL

\(T_{1}\) =-125°C = (273-125) = 148 K

\(T_{2}\) = 45° = (273+45) = 318 K

Put the value of given data in Charles law formula.

148 K/  318 K = V / 693 mL

V = 322.5 mL.

Therefore, by using Charles law the volume of a gas will be 322.5 mL.

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Answer:D, HBr

Explanation:

Answer:

D. HBr because divide the moles of the substances given in the question by the co-efficient in the equation. Smallest quotient is the limiting reactant

Answer:

Explanation:

To calculate the concentration of the resulting solution, we can use the dilution equation:

C1V1 = C2V2

where C1 and V1 are the initial concentration and volume of the stock solution, and C2 and V2 are the final concentration and volume of the resulting solution.

Plugging in the given values, we get:

C1 = 0.021 M

V1 = 8.19 mL = 0.00819 L

V2 = 25 mL = 0.025 L

Solving for C2:

C2 = (C1 x V1) / V2

= (0.021 M x 0.00819 L) / 0.025 L

= 0.00687 M

Therefore, the concentration of the resulting solution is 0.00687 M.

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Answer:

Mass = 8.46 g

Explanation:

Given data Mass of water produced = ? Mass of glucose = 20 g Mass of oxygen = 15 g

Solution:

Chemical equation:

C₆H₁₂O₆ + 6O₂     →   6H₂O + 6CO₂

Number of moles of glucose:

Number of moles = mass/molar mass

Number of moles = 20 g/ 180.16 g/mol

Number of moles = 0.11 mol

Number of moles of oxygen:

Number of moles = mass/molar mass

Number of moles = 15 g/ 32 g/mol

Number of moles = 0.47 mol

now we will compare the moles of water with oxygen and glucose.

              C₆H₁₂O₆           :            H₂O

                  1                   :              6

                0.11                :           6/1×0.11 = 0.66

                  O₂               :            H₂O

                  6                   :              6

                0.47                :           0.47

Less number of moles of water are produced by oxygen thus it will limit the yield of water and act as limiting reactant.

Mass of water produced:

Mass = number of moles × molar mass

Mass = 0.47 mol  ×18 g/mol

Mass = 8.46 g

Explanation: