The presence of heterogeneous catalyst will not affect the:
Select the correct answer below:
A. molecularity of the overall chemical equation
B. molecularity of the rate-determining step
C. both of the above
D. none of the above

Investigative phenomenon: why certain substances, such as oil and vinegar, don't mixWhen two different substances don't mix, this phenomenon is known as immiscibility. This is due to a lack of solubility between the two materials, which results in their separation.

This immiscibility is what occurs between oil and vinegar when they are mixed.Oil is a nonpolar liquid, while vinegar is an acidic polar liquid. Nonpolar liquids and polar liquids do not mix due to the polarity of the molecules. The reason for this is because the polar molecules interact with one another, while nonpolar molecules don't.

Polar liquids are liquids with molecules that have a positive and a negative end, such as vinegar, while nonpolar liquids are liquids with molecules that have no positive or negative end, such as oil.

Learn more about Investigative phenomenon:

https://brainly.com/question/28158885

#SPJ11

Answer:

True

Explanation:

they have the same number of protons but different number of neutrons which results in a different mass

I would greatly appreciate if you can give this the brainliest answer crown!

Answer: Water

Explanation:

Water is a liquid.

Answer:

The first one has 5 valence electrons, and the second has 7. (This can be counted by counting the amount of black dots on the biggest circle). Since 7 > 5, it would be easier for the second one to gain one (so that it completes it's valence shell) so the answer is the second one.

To ensure safety while carrying out her experiment, Maria should follow proper laboratory protocols and take necessary precautions like handle equipment and glassware carefully,wear appropriate personal protective equipment (PPE),read safety data sheets (SDS) to understand the proper handling,never work alone in the laboratory,etc.

Here are some recommendations:

1.Wear appropriate personal protective equipment (PPE), including safety goggles, lab coat, and gloves, to protect her eyes, body, and hands from potential hazards.

2.Familiarize herself with the properties and potential risks associated with the chemicals she will be working with. Read safety data sheets (SDS) to understand the proper handling, storage, and disposal procedures.

3.Work in a well-ventilated area or use a fume hood to minimize exposure to any fumes or gases that may be generated during the experiment.

4.Handle equipment and glassware carefully to prevent accidents or breakages. Ensure that all equipment is in good condition and appropriate for the experiment.

5.Follow proper techniques for measuring, mixing, and transferring chemicals to prevent spills or splashes. Use appropriate containers and labels to clearly identify and store chemicals.

6.Be aware of emergency procedures, including the location of safety equipment such as fire extinguishers, eyewash stations, and emergency showers.

7.Never work alone in the laboratory. Inform a supervisor or lab mate about the experiment and maintain communication throughout the process.

By following these safety measures, Maria can minimize risks and ensure a safe working environment during her experiment.

For more such questions on laboratory protocols

https://brainly.com/question/29781284

#SPJ8

A strong push would mean a large magnitude of force and vice versa a weak push would mean a small magnitude.

Answer:

A: 9 mol

Explanation:

The reaction is

\(2KClO_3\rightarrow 2KCl+3O_2\)

The stoichiometric relation is given by

\(\text{Number of moles of }KClO_3\times \dfrac{\text{Moles of}\ O_2}{\text{Moles of}\ KClO_3}\\ =\text{6 mol of}\ KClO_3\times \dfrac{\text{3 mol of }O_2}{\text{2 mol of }KClO_3}\\ =9\ \text{mol of }O_2\)

The moles of oxygen gas produced in the given reaction is \(9\ \text{mol of }O_2\).

The regiochemistry of hydroboration/oxidation of alkenes is (a) Markovnikov.

The hydroboration/oxidation reaction follows Markovnikov's rule, which states that the electrophile (in this case, the boron atom) adds to the carbon atom of the double bond that has the greater number of hydrogen atoms attached to it. The regioselectivity of the reaction is determined by the relative stability of the carbocation intermediates formed during the reaction.

In hydroboration, the boron atom adds to the less substituted carbon atom of the double bond, leading to the formation of a boron-alkyl bond and a boron-hydrogen bond. Subsequently, in the oxidation step, the boron-alkyl bond is replaced with an alcohol group (-OH) while maintaining the regiochemistry established during hydroboration.

Therefore, the regiochemistry of hydroboration/oxidation of alkenes is Markovnikov, where the electrophilic addition occurs preferentially at the carbon atom of the double bond that has the greater number of hydrogen atoms attached to it.

To learn more about alkenes here:

https://brainly.com/question/30217914

#SPJ11

Small airborne particles of solid substances such as grain, flour, sugar, coal, metal, or sawdust are commonly known as dust.

Dust is an accumulation of small particles that are released into the air through various activities such as cutting, grinding, drilling, or blasting. These activities generate a lot of fine dust particles, which can cause respiratory problems when inhaled. The type of dust generated depends on the source material and the nature of the activity. For example, sawdust is generated during woodworking, flour dust is common in bakeries, and coal dust is generated in coal mines.

Dust particles are classified based on their size, with the smallest particles being the most dangerous. Fine dust particles, also known as PM2.5, are small enough to penetrate deep into the lungs and can cause a range of health problems such as asthma, bronchitis, and lung cancer. Long-term exposure to dust can also lead to chronic respiratory diseases. Dust control measures such as ventilation, dust suppression, and personal protective equipment can help reduce the risk of dust exposure in workplaces.

Learn more about bronchitis here :

https://brainly.com/question/31024710

#SPJ11

A germinating seed is one from which a plant has started to grow. A non-germinating seed is usually dry, and a new plant has not yet emerged. The germinating corn seed consumed more oxygen than the non-germinating corn seed. This statement is true.  Therefore, option A is correct.

A dry seed starts to absorb water through its seed coat when it comes into touch with damp soil or growing medium. The seed swells and the seed coat splits open as it absorbs more water. Small shoots and roots make up the embryo inside the seed. First to appear from the seed is the root.

The prerequisites for seed germination include oxygen, water, temperature, and, only for particular seeds, light. The sprouting of seeds is impacted when one or more of these are missing. Similar internal elements that impact this process include seed viability, dormancy, and embryonic maturity.

Thus, option A is correct.

To learn more about germinating seed, follow the link;

https://brainly.com/question/15976369

#SPJ1

It is true that decomposers such as bacteria recycle dead tissue into reusable chemicals for other producers, which are then eaten by consumers.

Nutrient recycling is the process by which essential elements in the ecosystem are in transition between abiotic and biotic factors.

In an ecosystem, the following groups of organisms exists:

Decomposers are responsible for breaking down dead tissues of living organisms leading to the release of nutrients to the soil. These nutrients are used by producers, which are then eaten by consumers.

Learn more about nutrient recycling at: https://brainly.com/question/1410462

Answer:

Fluorine belongs to the group 7 A so it must have 7 electrons in the oribits so the answer would be A as u count the electrons in the orbits, There are exactly 7 electron

Explanation:

The correct Option is C. Electrons are transferred → Ions form → Ions are attracted to each other.

The right request of steps during the development of an ionic bond is:

C: Electrons are transferred → Ions form → Ions are attracted to each other

In ionic holding, at least one electrons are moved from a metal particle to a non-metal molecule, framing positive and negative particles, separately. The contrary charges of the particles draw in one another, subsequent in the arrangement of an ionic compound. Accordingly, the right request of steps in the development of an ionic bond is first, electrons are moved starting with one molecule then onto the next, then particles are framed, lastly, the oppositely charged particles are drawn to one another to shape an ionic compound.

To learn more about ionic bond formation, refer:

https://brainly.com/question/3211376

#SPJ4

The complete question is:

Which shows the correct order of steps during the formation of an ionic bond?

A: Ions are attracted to each other → Electrons are transferred → An ionic compound forms

B: An ionic compound forms → Ions are attracted to each other → Electrons are transferred

C: Electrons are transferred → Ions form → Ions are attracted to each other

D: Ions form → Electrons are transferred → Ions are attracted to each other

Answer: C

Explanation: JUST TOOK THE QUIZ HOPE THIS HELPED

Answer:

A book on a shelf

Explanation:

Answer: Determination of Equilibrium Constant, Determination of Solubility Products, Determination of pH, Determination of Activity Coefficients,

Explanation:

The excess reactant is Al, and the mass of the remaining excess Al after the reaction is 16.5 grams.

To determine the excess reactant and the mass of the remaining excess reactant, we need to first write and balance the chemical equation for the reaction between \(Fe_{2} O _{3}\) and Al:

2 \(Fe_{2} O _{3}\) + 2 Al → \(Al_{2} O_{3}\) + 4 Fe

From the balanced equation, we can see that the stoichiometric ratio of \(Fe_{2} O _{3}\)to Al is 2:2, or 1:1. This means that both reactants are consumed in equal amounts, and neither is in excess.

To confirm this, we can calculate the amount of product formed by each reactant and compare it to the actual amount of product formed:

For \(Fe_{2} O _{3}\) : Using its molar mass of 159.69 g/mol, the number of moles of Fe2O3 is 35.0 g / 159.69 g/mol = 0.2192 mol. According to the balanced equation, 2 moles of \(Fe_{2} O _{3}\) produces 4 moles of Fe. Therefore, the number of moles of Fe produced from 0.2192 mol of \(Fe2O _{3}\) is (4/2) x 0.2192 = 0.4384 mol.

For Al: Using its molar mass of 26.98 g/mol, the number of moles of Al is 30.0 g / 26.98 g/mol = 1.111 mol. According to the balanced equation, 2 moles of Al produces 4 moles of Fe. Therefore, the number of moles of Fe produced from 1.111 mol of Al is (4/2) x 1.111 = 2.222 mol.

We can see that Al produces twice as much Fe as \(Fe_{2} O _{3}\), indicating that \(Fe_{2} O _{3}\) is the limiting reactant and Al is in excess. However, we also need to calculate the mass of the remaining excess Al:

The number of moles of Al that reacted is 1.111 - 0.5 (since 2 moles of Al react with 2 moles of \(Fe_{2} O _{3}\)) = 0.611 mol.

The mass of the remaining excess Al is therefore 0.611 mol x 26.98 g/mol = 16.5 g (rounded to one decimal place).

Therefore, the excess reactant is Al, and the mass of the remaining excess Al after the reaction is 16.5 grams.

Learn more about chemical equation

https://brainly.com/question/30087623

#SPJ4

True. For these before leaving the ER undergo a process called N-terminal signal peptide cleavage. During this process, the signal peptide, which is an amino acid sequence that helps guide the protein into the ER, is cleaved, resulting in a smaller polypeptide.

Polypeptides are composed of a variety of different amino acids that are linked together in a sequence. This sequence of amino acids determines the structure and function of the protein that they make up. Polypeptides are essential components of cells, playing a role in many essential processes, including:

They are found in the cytoplasm and nucleus of cells, as well as in extracellular fluid. Polypeptides are also important components of:

Learn more about The Polypeptides:

https://brainly.com/question/14183859

#SPJ4

Answer:

percentage composition = 13.2%

Explanation:

percentage of magnesium in magnesium bromide can be found by molar mass of magnesium over molar mass of magnesium bromide.

Molar mass of elements can be found using a standard IUPAC Periodic Table.

M(Mg) = 24.31 g/mol

M(MgBr₂) = 24.31 + 79.90×2 = 184.11 g/mol

∴ percentage composition = 13.2%

Answer:

2.7 atm = 2052 torr

I hope this helps you.

Answer:

2052 torr

Explanation:

Multiply 2.7 atm by the conversion factor to torr which is 760 torr = 1 atm

Answer: The volume of product formed is 0.26 L

Explanation:

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

\(\text{Moles of} H_2=\frac{0.02g}{2g/mol}=0.01moles\)

\(2H_2(l)+O_2(l)\rightarrow 2H_2O(g)\)

As \(O_2\) is the the excess reagent, \(H_2\) is the limiting reagent as it limits the formation of product.

According to stoichiometry :

2 moles of \(H_2\) give = 2 moles of \(H_2O\)

Thus 0.01 moles of \(H_2\) will give =\(\frac{2}{2}\times 0.01=0.01moles\)  of \(H_2O\)

According to ideal gas equation:

\(PV=nRT\)

P = pressure of gas = 101.325 kPa = 1 atm

V = Volume of gas = ?

n = number of moles = 0.01

R = gas constant =\(0.0821Latm/Kmol\)

T =temperature =\(40^0C=(40+273)K=313K\)

\(V=\frac{nRT}{P}\)

\(V=\frac{0.01mol\times 0.0821L atm/K mol\times 313K}{1atm}=0.26L\)

Thus the volume of product formed is 0.26 L

Answer:

When cosmetics companies use chemicals to make their products, they could dump their waste into rivers and oceans, causing water pollution to occur. The wildlife that lives in these habitats will probably die from them, causing some species to die out and become extinct.

Explanation:

Also, greenhouse gases could be released into the atmosphere, which would cause global warming.

The nuclear equation for the alpha decay of Uus-294 is

\(^{294}{117} Uus\) →\(^{4}{2}He + ^{290}_{115}Mc\)

To complete the nuclear equation for the alpha decay of Uus-294, we need to determine the missing product.

During alpha decay, the emission of an alpha particle, composed of two protons and two neutrons, leads to the formation of a new nucleus.

The balanced nuclear equation for the alpha decay of Uus-294 can be represented as follows:

\(^{294}{117} Uus\) → \(^{4}{2}He +\)_____(missing product)

In this equation, the atomic number of the missing product must be two less than the atomic number of Uus-294 (117 - 2 = 115), and the mass number of the missing product must be four less than the mass number of Uus-294 (294 - 4 = 290).

Based on this information, the missing product can be identified as:

\(^{290}_{115}Mc\)

Mc stands for Moscovium, which has an atomic number of 115. By subtracting two from the atomic number of Uus, we obtain the atomic number of Mc. The mass number of Mc-290 is obtained by subtracting four from the mass number of Uus-294.

Therefore, the  nuclear equation for the alpha decay of Uus-294 is:

\(^{294}{117} Uus\)→ \(^{4}{2}He + ^{290}_{115}Mc\)

Know more about alpha decay     here:

https://brainly.com/question/25714324

#SPJ8

The complete question is :

Complete this nuclear equation for the alpha decay of Uus-294 by writing a

notation for the missing product:

\(^{204} {117} Uns\)→\(^{4} _{2} He +\)_____

The reaction that is occurring in this question is:

H2 + I2 -> 2 HI

As we can see, the molar ratio for H2 and I2 is 1:1, one mole of H2 for each mole of I2, and the molar ratio between any reactant and HI is 1:2, which means the number of moles of product will be two times more than the number of moles of the reactants

We have:

3.0 moles of H2

2.0 moles of I2

1.0 moles of HI

According to the molar ratio, we should have the name number of moles of I2 and H2, which means that H2 is in excess and I2 is the limiting reactant with 2 moles

If we have 2 moles of I2, and the molar ratio of I2 and HI is 1:2, we should have 4 moles of HI being produced

Therefore the theoretical number of moles is 4.0 moles of HI from 2.0 moles of I2

Answer:

4.79x10¹³s⁻¹

Explanation:

For a first order reaction, the graph of ln k against 1/K follows Arrhenius equation:

lnK = ln A - Ea/RT

Where A is pre-exponential factor, Ea is activation energy, R gas constant and T is absolute temperature

If you graph ln k = y and 1/T = x:

y = lnA - Ea/R x

Where the slope = -Ea/R

And the intercept = lnA

To solve the pre-exponential factor:

31.5 = lnA

e^31.5 =

s⁻¹ because the reaction is first order.

The pre - exponential factor is obtained form the information given ion the question as  4.79 × 10^13 s−1.

For a first order reaction, the Arrhenius equation is written as;

lnk = (-Ea/R)1/T + lnA. This is similar to the equation of a straight line, y = mx + c.

The pre-exponential factor is the intercept (c). Hence;

ln A = 31.5

A = e^31.5

A = 4.79 × 10^13 s−1

Learn more: https://brainly.com/question/20906233

Answer:

Thermal energy refers to the energy contained within a system that is responsible for its temperature.

Answer:

Explanation:

a) 202.4 g

b) 185.24 m

c) 0.13 dm

d) 6.91 L

e)0.0546 mol

f) 2.7 s

g) 42kg

h) 0

i) -0.11 g

j) -0.34 mL

The balanced equation for nitrogen reacting with oxygen to form nitrogen dioxide is 2NO + O2 → 2NO2, and this reaction is a redox reaction where nitrogen is oxidized, and oxygen is reduced.

The balanced equation for nitrogen reacting with oxygen to form nitrogen dioxide is:

2NO + O2 → 2NO2

This equation represents the reaction between two molecules of nitrogen monoxide (NO) and one molecule of oxygen (O2) to produce two molecules of nitrogen dioxide (NO2). The coefficients in the equation ensure that the number of atoms of each element is the same on both sides of the equation, indicating a balanced equation.

This reaction is a classic example of a redox reaction, where the nitrogen is oxidized and the oxygen is reduced. Nitrogen monoxide acts as the reducing agent, while oxygen acts as the oxidizing agent. The products of the reaction, nitrogen dioxide, is a reddish-brown gas that is an important component of smog and is a potent greenhouse gas.

Learn more about redox reaction here :-

https://brainly.com/question/28383671

#SPJ11

Answer:

See explanation

Explanation:

The major difference between distance and displacement is that distance is a scalar quantity while displacement is a vector quantity. Scalar quantities have magnitude without direction while vector quantities have both magnitude and direction.

The distance covered by Benjamina in both cases just refer to the difference in her position at each time without reference to the direction in which she changed her position.

Her displacement will clearly mention the direction in which she moved both when she walked to the front door of her apartment and when she walked to a friend's apartment.

To determine the molar concentration of Ni in the 20.0 mL solution, we can use the following steps:

We know that the initial sample of the solid contained Ni, so we can assume that the concentration of Ni in the original solution was also 6.79 ppm.

We know that the final volume of the solution is 100.0 mL.

We know that the initial volume of the sample was 5.91 g / 6.022 x 10^23 atoms/mol x 1000 molecules/atom = 0.00000998 L.

We know that the mass of the sample was 5.91 g.

We can use the formula for molar concentration:

Molar concentration (M) = Mass of solute (m) / Final volume (V)

We can rearrange this formula to solve for the mass of solute:

Mass of solute (m) = Molar concentration (M) x Final volume (V)

Substituting the known values, we get:

Mass of solute (m) = 6.79 ppm x 100.0 mL = 0.000679 g

We can convert this mass to moles by dividing it by the molar mass of Ni:

Moles of solute (m) = Mass of solute (m) / Molar mass of Ni (molar mass)

Substituting the known values, we get:

Moles of solute (m) = 0.000679 g / 62.94 g/mol = 0.00105 mol

We can use this value to find the number of moles of Ni in the original solution:

Number of moles of Ni in original solution (Ni) = Mass of solute (m) / Molar mass of Ni (molar mass)

Substituting the known values, we get:

Number of moles of Ni in original solution (Ni) = 0.00105 mol / 62.94 g/mol = 0.0000168 mol

Since we know that the initial volume of the sample was 0.00000998 L, we can calculate the number of moles of Ni in the original solution by dividing the number of moles of Ni in the original solution by the dilution factor:

Number of moles of Ni in final solution (Ni) = Number of moles of Ni in original solution / Dilution factor

We can use the fact that the final volume of the solution is 100.0 mL to calculate the dilution factor:

Dilution factor (d) = Final volume (V) / Initial volume (V) = 100.0 mL / 0.00000998 L = 1000000

Substituting the known values, we get:

Number of moles of Ni in final solution (Ni) = 0.0000168 mol / 1000000 = 0.000000168 mol

Therefore, the molar concentration of Ni in the 20.0 mL solution is 0.000000168 mol/mol or 6.79 x 10^-6 M.

Learn more about moles visit : brainly.com/question/15356425

#SPJ11