mL of 0.00619 M NaI (aq) is combined with 478. mL of 0.00641 M Pb(NO3)2 (aq). Determine if a precipitate will form given that the Ksp of Pbl2 is 1.40x10^8.a. Precipitation will occur because Qsp > KspB. Precipitation will occur because Qsp < KspC. Precipitation will occur because Qsp = KspD. Precipitation will not occur because Qsp > KspE. Precipitation will not occur because Qsp < Ksp

Answer:

Monocarbon tetrasulfide

Explanation:

Name of compound is mono carbon tetrasulfide.

Compound is defined as a chemical  substance  made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not  called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.

Learn more about compounds ,here:

https://brainly.com/question/14658388

#SPJ2

Jacinda Ardern got involved with Tonga after the eruption due to the following reasons:

The correct answer is: 2, 3, and 4.

Jacinda Ardern, the Prime Minister of New Zealand, got involved with Tonga after the underwater volcanic eruption that occurred in January 2022.

There were several reasons why she got involved:

Learn more about Tonga eruptions at: https://brainly.com/question/927683

#SPJ1

Complete question:

Which of these are the reasons why Jacinda Ardern got involved with Tonga after the eruption?

1. the desire to preserve ocean resources in the area through satellite monitoring

2. the desire to get rid of the ash plume that threatens to cover New Zealand

3. the desire to acquire more information about the volcano's current activity

4. the desire to provide assistance to the people of Tonga by giving them provisions

3 and 4

2, 3 and 4

1 only

O 1 and 2

The specific heat capacity of a substance is the amount of heat needed to elevate it by 1 degree kelvin per gram. The easier it is for something to heat up, then, the smaller the heat capacity. We would suppose that a cook in a hurry would want a pan that heats up more quickly and would choose one with a lesser heat capacity.

0.385 for copper and 0.900 for aluminum.

Despite using non-SI units, we can still compare using it. It is obvious to him that copper has a lower specific heat, so he will pick that.

In case you're curious, you can also approach this issue from the perspective of heat conduction. To do this, look up the thermal conductivities of each material, and then apply Fourier's rule of heat conduction to determine that Copper would be best.

To know more about specific heat visit:-

https://brainly.com/question/11297584

#SPJ1

Step 1

The reaction must be completed and balanced as follows:

C3H8 + 5 O2 => 3 CO2 + 4 H2O

-------------

Step 2

Information provided:

20.0 g of C3H8

10.0 g of O2

----

Information needed:

1 mole of C3H8 = 44.1 g

1 mole of O2 = 32.0 g

(use your periodic table please)

-------------

Step 3

By stoichiometry,

C3H8 + 5 O2 => 3 CO2 + 4 H2O

44.1 g C3H8 ---------- 5 x 32.0 g O2

20.0 g C3H8 ---------- X

X = 20.0 g C3H8 x 5 x 32.0 g O2/44.1 g C3H8

X = 72.6 g O2

For 20.0 g of C3H8, 72.6 g of O2 is needed, but there is only 10.0 g of O2.

Therefore,

Answer:

The limiting reactant = O2

The excess = C3H8

Approximately 0.628 grams of aluminum are required to react with 35 ml of 2.0 M hydrochloric acid.

To determine the grams of aluminum required to react with 35 ml of 2.0 M hydrochloric acid (HCl), we need to consider the stoichiometry of the balanced chemical equation.

The molar ratio between HCl and aluminum (Al) in the balanced equation is 6:2, which means 6 moles of HCl react with 2 moles of aluminum. From the given concentration of HCl (2.0 M) and volume (35 ml), we can calculate the moles of HCl:

moles of HCl = concentration × volume

              = 2.0 M × 0.035 L

              = 0.07 moles

Using the stoichiometry ratio, we can determine the moles of aluminum required:

moles of Al = (2/6) × moles of HCl

                = (2/6) × 0.07

                = 0.0233 moles

Finally, we can convert the moles of aluminum to grams using its molar mass (26.98 g/mol):

grams of Al = moles of Al × molar mass

              = 0.0233 mol × 26.98 g/mol

              = 0.628 g

Therefore, approximately 0.628 grams of aluminum are required to react with 35 ml of 2.0 M hydrochloric acid.

learn more about hydrochloric acid here:

https://brainly.com/question/14006357

#SPJ11

Answer:

Sodium oxide is the product

Explanation:

4Na+O2->2Na2O

Answer: B!!!

Explanation:

To determine the maximum pressure of water vapor in wet hydrogen at 1 atm pressure in which chromium can be heated without oxidation occurring at 1500 K, we need to consider the water vapor pressure equilibrium with respect to the oxidation reaction of chromium.

The oxidation of chromium by water vapor can be represented by the following equation:

2Cr + 3H2O(g) → Cr2O3 + 3H2(g)

At equilibrium, the ratio of the product of the partial pressures of the products to the product of the partial pressures of the reactants should be equal to the equilibrium constant (Kp) for the reaction.

The equilibrium constant expression for the reaction can be written as:

Kp = (P(Cr2O3) * P(H2)^3) / (P(Cr)^2 * P(H2O)^3)

At the maximum pressure of water vapor, oxidation of chromium does not occur. This means that the partial pressure of water vapor (P(H2O)) will be equal to zero. Thus, the equilibrium constant expression can be simplified as follows:

Kp = (P(Cr2O3) * P(H2)^3) / (P(Cr)^2)

Since the pressure of hydrogen (P(H2)) is 1 atm and the pressure of chromium (P(Cr)) is negligible compared to the other pressures involved, we can further simplify the expression to:

Kp ≈ P(Cr2O3)

We can now calculate the equilibrium constant (Kp) using available thermodynamic data. The standard Gibbs free energy change (ΔG°) for the oxidation reaction of chromium can be obtained from tables or literature. Let's assume ΔG° = -540 kJ/mol.

The equilibrium constant can be calculated using the equation:

ΔG° = -RT ln(Kp)

Where:

ΔG° = standard Gibbs free energy change (-540 kJ/mol)

R = gas constant (8.314 J/(mol·K))

T = temperature (1500 K)

Converting the units, we have:

ΔG° = -540,000 J/mol

R = 8.314 J/(mol·K)

T = 1500 K

Substituting the values into the equation and solving for ln(Kp), we get:

-540,000 = -8.314 * 1500 * ln(Kp)

ln(Kp) = -540,000 / (-8.314 * 1500)

ln(Kp) ≈ 45.874

Taking the exponential of both sides to solve for Kp, we have:

Kp = e^(45.874)

Kp ≈ 1.13 x 10^19

Since Kp ≈ P(Cr2O3), the maximum pressure of Cr2O3 (P(Cr2O3)) at equilibrium is approximately 1.13 x 10^19 atm.

The maximum pressure of water vapor in wet hydrogen at 1 atm pressure, in which chromium can be heated without oxidation occurring at 1500 K, is approximately 1.13 x 10^19 atm.

Regarding the second part of the question, the calculation does not provide information about the exothermic or endothermic nature of the oxidation reaction of chromium by water vapor. The equilibrium constant (Kp) only indicates the position of the equilibrium, not the direction or energy change of the reaction. To determine the thermodynamics of the reaction (whether it is exothermic or endothermic), we would need additional information such as the enthalpy change (ΔH°) of the reaction.

Learn more about chromium ,visit:

https://brainly.com/question/31984964

#SPJ11

You can take small steps to make environment more clean, activities like saving electricity, water, fuel, etc. decrease your carbon footprint.

1. Stop buying your water in plastic. Get a reusable water bottle.

2. Incorporate walking or biking to some of your regular short-trip destinations.

3. Turn off lights and unplug devices when you’re not using them.

4. Eat more food that is grown or made locally and less red meat.

5. Use the cold water cycle for washing your clothes.

6. Use alternative transportation (bus, train, carpool, or bike) to get to work one day per week.

To know more about the carbon footprint, here

brainly.com/question/29548285

#SPJ4

The change that can make the model of nitrogen atom more accurate is to show 7 neutrons in the nucleus. The correct option is C.

An atom is a matter unit of matter that defines a chemical element distinctively. An atom is made up of a central nucleus one or more negatively charged electrons.

The nucleus is positively charged and encompasses one or more protons and neutrons, which are relatively heavy particles.

Nitrogen is an atom with seven protons, seven neutrons, and seven electrons. The nucleus is made up of neutrons and protons that are all stuck together in the middle of the atom.

The addition0. of 7 neutrons in the nucleus can improve the accuracy of the nitrogen atom model.

Thus, the correct option is C.

For more details regarding atom, visit:

https://brainly.com/question/1566330

#SPJ1

Your question seems incomplete, the complete question is:

A students drawing of a nitrogen atom is shown. What change would make the model more accurate?

A-move the electrons into the nucleus

B-add 2 more protons

C-show 7 neutrons in the nucleus

D-remove 2 electrons

The molarity of the NaOH(aq) solution is 0.156 M.

The balanced equation for the reaction between sulfuric acid and sodium hydroxide is H₂SO₄(aq) + 2NaOH(aq) → Na₂SO₄(aq) + 2H₂O(l). From the balanced equation, it can be deduced that the mole ratio of NaOH to H₂SO₄ is 2:1. Hence, the moles of H₂SO₄ reacted = Molarity of H₂SO₄ × Volume of H₂SO₄ used in liters = 0.220 M × 0.03230 L = 0.007106 moles.

Using mole ratio, the moles of NaOH reacted = 2 × 0.007106 = 0.01421 moles. Molarity of NaOH = Moles of NaOH / Volume of NaOH used in liters= 0.01421 moles / 0.04630 L = 0.306 M or 0.156 M (rounded off to three significant figures). Thus, the molarity of the NaOH(aq) is 0.156 M.

Learn more about molarity here:

https://brainly.com/question/2817451

#SPJ11

Answer:

D

Explanation:

Atoms make up all matter on earth, basically atoms make up everything, even air.

In addition to purposeful ventilation, air must inevitably enter a building through the process known as "air infiltration."

Thus, This is the unplanned or accidental entry of air into a space through openings and fissures in the building envelope. Exfiltration is the phrase used to describe the equivalent loss of air from a confined space.

The porosity of the building shell and the strength of the wind and temperature's natural driving forces both affect how much air penetration occurs.

When the pressures acting across such openings are governed by weather conditions rather than purposefully (like mechanically) created driving forces, vents and other apertures built into a building as part of the ventilation design can also become paths for unintended air movement.

Thus, In addition to purposeful ventilation, air must inevitably enter a building through the process known as "air infiltration."

Learn more about Ventilation, refer to the link:

https://brainly.com/question/31444740

#SPJ4

Answer:

See explanation

Explanation:

There are two chemicals commonly used to test for water. They are;

CuSO4: Anhydrous CuSO4  is white in colour, when it absorbs moisture, its colour changes from white to blue.

CoCl2: Anhydrous CoCl2 is blue in colour. when it absorbs moisture, its colour changes from blue to pink.

The mass of water produced if the percent yield of the reaction is 72% is 16.2g.

Mass of acetylene = 40.0 grams

Mass of oxygen = 40.0 grams

Percent yield of the reaction = 72%

The balanced chemical equation is : 2 C2H2(g) + 5 O2(g) → 4 CO2(g) + 2 H2O(g)

From the balanced chemical equation, it is clear that 2 moles of acetylene reacts with 5 moles of oxygen to form 2 moles of water.

To find out limiting reagent

Moles of acetylene = Given mass of acetylene / molar mass of acetylene

                                 = 40.0 g / 26 g/mol = 1.54 moles

Moles of oxygen = Given mass of oxygen / molar mass of oxygen

                                = 40.0 g / 32 g/mol = 1.25 moles

The limiting reactant is oxygen because its number of moles is less than acetylene. Oxygen will react with 1.25 moles of acetylene present and form CO2 and H2O.

According to the balanced equation, the stoichiometric ratio of C2H2 to H2O is 2:2, meaning that for every 2 moles of C2H2, 2 moles of H2O are produced.

Since the stoichiometry is 1:1, the moles of water produced will be the same as the moles of acetylene used.

The number of moles of H2O produced 1.25 moles.

The mass of H2O produced = Number of moles of H2O × Molar mass of H2O

Mass of H2O produced = 1.25 × 18 = 22.5 g

Given percent yield = 72%

The actual yield can be calculated as follows;

Percent yield = Actual yield / Theoretical yield × 100

72% = Actual yield / 22.5 g × 100

Actual yield = 22.5 g× 72 / 100 =16.2 g

Thus, the mass of water produced if the percent yield of the reaction is 72% is 16.2g.

To learn more about acytelene :

https://brainly.com/question/19872772

#SPJ11

The equilibrium constant indicates the relative concentrations of reactants and products at equilibrium.

However, the rate of reaction is also influenced by factors such as reaction mechanism, temperature, and reactant concentrations. It's possible that the reaction with the smaller equilibrium constant has a faster rate, allowing it to produce more product in the same amount of time. Additionally, the reaction with the larger equilibrium constant may have a higher activation energy, making it more difficult to proceed to completion in the short amount of time given. Ultimately, the rate of reaction may outweigh the thermodynamic driving force in determining which reaction produces more product in a given time frame. Although a higher equilibrium constant (2.2 * 10^4) indicates a greater extent of reaction favoring products, it doesn't necessarily mean a faster reaction rate. The reaction with a smaller constant may have a faster rate, allowing it to reach equilibrium and produce more desired product within the 15-minute timeframe. This can occur due to differences in activation energy or presence of a catalyst that promotes the reaction with a smaller equilibrium constant.

To know more about equilibrium visit:

https://brainly.com/question/30694482

#SPJ11

Answer:

it s not on periodic table this is not real element

Explanation:

Answer:

Ammonium nitrate is NH4NO3

iron(II) sulfate is FeSO4

magnesium hydroxide is MG(OH)2

titanium(II) chloride is TiCI2

cobalt(III) oxide is Co2O3

potassium sulfide is K2S

Barium acetate is C4H6BaO4

magnesium bromide is MgBr2

lithium carbonate is Li2CO3

potassium permanganate is KMnO4

DNA and RNA are amplified in vitro using polymerase chain reaction (PCR), which is frequently employed in biochemical analysis.

The PCR process is very temperature sensitive, and thermal management is crucial to PCR operation in order to maintain the necessary set points for temperature at each stage of the procedure. The objective of this investigation is to develop a thermal approach that can quickly boost the heating/cooling thermal cycle speed while keeping the substrate that contains the aqueous nucleic acid sample at a constant temperature. This study examines a novel microfluidic PCR heat cycler that makes use of a suitably configured design that is filled with a porous material.

Learn more about Polymerase chain reaction here-

https://brainly.com/question/11417541

#SPJ4

To determine if a wavelength of 455 nm is appropriate for spectroscopic analysis of FeNCS2+, we need to consider the absorption spectrum of the substance. The reddish-brown color suggests that FeNCS2+ absorbs light in the visible spectrum.

If the absorption spectrum of FeNCS2+ is not known, it would be ideal to perform a UV-visible absorption spectroscopy experiment to obtain the absorption spectrum of the substance. This experiment would involve measuring the absorbance of FeNCS2+ at various wavelengths within the visible and UV ranges.

However, if the absorption spectrum is not available, we can make some general assumptions. In the visible range, wavelengths between approximately 400 nm and 700 nm are commonly used for spectroscopic analysis. The specific wavelength of 455 nm falls within this range and may provide suitable results for FeNCS2+. However, it is important to note that without the actual absorption spectrum of FeNCS2+, we cannot definitively determine the most appropriate wavelength.

To explore other potential wavelengths, a broader range of visible wavelengths, such as 400 nm, 500 nm, and 600 nm, could be considered. Additionally, if the absorption spectrum extends into the UV range, wavelengths below 400 nm should also be explored. Ultimately, it is best to experimentally determine the absorption spectrum of FeNCS2+ to identify the most appropriate wavelength for accurate analysis.

Know more about wavelength here:

https://brainly.com/question/31143857

#SPJ11

What you should do to determine if you could still save money is:  If the cost for using additional cheaper pulp in the thicker boxes is lesser.

The following are the step to follow in order to determine if you could still save money.

Therefore what you should do to determine if you could still save money is:  If the cost for using additional cheaper pulp in the thicker boxes is lesser.

Learn more about cardboard here:https://brainly.com/question/27536920

#SPJ1

Among the given options, the weak electrolytes are NH₃ and CH₃OH.

NH₃ (ammonia) is a weak base, and when it dissolves in water, it produces ammonium ions (NH₄⁺) and hydroxide ions (OH⁻), but only to a limited extent.

CH₃OH (methanol) is a polar molecule and can form hydrogen bonds with water, but it does not ionize or dissociate into ions when dissolved in water. Therefore, it is considered a weak electrolyte.

On the other hand, CaSO₄ (calcium sulfate) and AgCl (silver chloride) are both ionic compounds that dissociate into ions in water and conduct electricity well. Therefore, they are strong electrolytes.

In summary, NH₃ and CH₃OH are weak electrolytes, while CaSO₄ and AgCl are strong electrolytes.

To learn more about electrolytes refer to:

brainly.com/question/29771118

#SPJ4

While comparing two compounds observed in the same chemical reaction, chemical equation of the reaction like information is needed to convert from grams of one substance to grams of the other substance.

To convert from grams of one substance to grams of the other substance in a chemical reaction, you need to know the chemical equation for the reaction and the relative proportions of the substances in the reactants and products.

For example, consider the following chemical equation:

2 H2 + O2 ---> 2 H2O

In this equation, compounds and the reactants are 2 molecules of hydrogen gas (H2) and 1 molecule of oxygen gas (O2). The products are 2 molecules of water (H2O). The coefficient 2 in front of H2O indicates that 2 molecules of water are produced for every 1 molecule of oxygen gas and 2 molecules of hydrogen gas. If you know the mass of one of the substances (either H2, O2, or H2O) in the reaction, you can use the coefficients in the chemical equation to convert the mass to the corresponding mass of the other substance. For example, if you know the mass of H2O, you can use the coefficient 2 in front of H2O to convert the mass to the corresponding mass of H2 or O2. Similarly, if you know the mass of H2 or O2, you can use the coefficients in front of these substances to convert the mass to the corresponding mass of H2O. It is important to note that the conversion from grams of one substance to grams of the other substance is only accurate if the chemical reaction is balanced, meaning that the number of atoms of each element is the same on both sides of the equation. If the chemical equation is not balanced, the conversion will not be accurate.

To know more about compounds please refer: https://brainly.com/question/13516179

#SPJ4

The empirical formula is the simplest formula of the substance.

We have to note that the transition elements are the elements that we know that have a variable oxidation state and this is coming from the fact that the elements do have an incompletely filled d orbital.

We can not be able to obtain the empirical formula for the compound because the other details are missing. However, in the presence of the required details, the formula can be obtained in the question.

Learn more about empirical formula:https://brainly.com/question/14044066

#SPJ1

Answer:

All chemical reactions occur at different rates

Answer:

The reactants are on the left of the arrow, the products are on the right.

Explanation:

Reactants are the substances that exist before the chemical reaction takes place. When writing a chemical reaction or equation, they are found on the left of the arrow. They react to form new substances, which are known as the products. The products are found to the right of the arrow in the reaction.

answer and explanation

1 L = 1000 mL

and so to determine 7.8L we can o the calculation as follows

x mL = 1000 mL/ 1 L x 7.8 L/1 = 7800 mL/1 = 7800 mL

Answer:biomass energy, hydropower, and wind energy

Explanation:

The time required to deposit 1.00 kg of Cr using a current of 200.0 A is approximately 553 seconds, or 9.22 minutes.

The amount of chromium deposited is directly proportional to the amount of electricity that passes through the electrolytic cell.

The balanced chemical equation for the electrodeposition of chromium from a solution of potassium dichromate is:

Cr2O7^2−(aq) + 14H+(aq) + 6e− → 2Cr3+(aq) + 7H2O(l)

From the above equation, it can be inferred that it takes six moles of deposit electrons to produce two moles of chromium or 6 moles of electrons produce 52 g of Cr.

Therefore, the amount of charge required to deposit 1.00 kg of Cr is:

1.00 kg Cr × (1000 g / 1 kg) × (6 mol e- / 52 g Cr) × (96500 C / mol e-) = 110,577 C

The time required to deposit 110,577 C at a current of 200.0 A is:

t = Q / I = 110,577 C / 200.0 A = 552.89 seconds molecules

Therefore, It takes roughly 553 seconds or 9.22 minutes to deposit 1 kilogram of Cr with a current of 200.0 A.

Learn more about molecules here:

brainly.com/question/19922822

#SPJ4