why the enzyme function varies with substrate concentration before the catalase concentration was saturated with hydrogen peroxide.

Answer:

C)2 mole Cu(NO3)2 / 2 mole Fe

Explanation:

I'm pretty sure.

When iron is combined with copper (1) nitrate, it produces iron (II) nitrate and copper. The following could NOT be a mole ratio in this chemical reaction is:

D) 1 mole Fe(NO₃)₂ / 1 mole Fe

To determine which of the given mole ratios could NOT be part of the chemical reaction between iron and copper(1) nitrate, we need to write the balanced chemical equation for the reaction and then compare it to the given ratios.

The balanced chemical equation for the reaction is:

Fe + Cu(NO₃)₂ → Fe(NO₃)₂ + Cu

A) 1 mole Fe / 2 mole Cu

This mole ratio is consistent with the balanced chemical equation, where 1 mole of Fe reacts with 2 moles of Cu(NO₃)₂ to produce 1 mole of Fe(NO₃)₂ and 1 mole of Cu. So, this ratio could be part of the chemical reaction.

B) 1 mole Fe(NO₃)₂ / 2 mole Cu

This mole ratio is also consistent with the balanced chemical equation, where 1 mole of Fe(NO₃)₂ is produced by reacting 2 moles of Cu(NO₃)₂. So, this ratio could be part of the chemical reaction.

C) 2 mole Cu(NO₃)₂ / 2 mole Fe

This mole ratio is consistent with the balanced chemical equation, where 2 moles of Cu(NO₃)₂ react to produce 2 moles of Fe(NO₃)₂. So, this ratio could be part of the chemical reaction.

D) 1 mole Fe(NO₃)₂ / 1 mole Fe

This mole ratio implies that 1 mole of Fe(NO₃)₂ is produced by reacting with 1 mole of Fe, which is not consistent with the balanced chemical equation. The equation shows that 1 mole of Fe reacts with 1 mole of Cu(NO₃)₂ to produce 1 mole of Fe(NO₃)₂ and 1 mole of Cu. Therefore, this ratio could NOT be part of the chemical reaction.

So, the correct answer is:

D) 1 mole Fe(NO₃)₂ / 1 mole Fe

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Answer:

C: It depends on the entropy and enthalpy of the reaction.

Explanation:

Gibbs free energy is defined as the maximum amount of non-expansion work that can be gotten from a closed system. Now this work is usually done in place of the system’s internal energy and Energy that is not extracted as work is usually exchanged with the immediate surroundings in the form of heat.

Consider that after recrystallization, you obtained 7.0 g of dry pure substance from 10.0 g of impure material. Your recovery rate is then 70% (7/10 × 100).

Recrystallization recovery percentages are often lower than 100%, though occasionally they might be higher (see the following issue). This is brought on by impurity loss, material that was left in the liquid solution after dissolving, and "mechanical losses."

The amount if pure compound that is present in the finished chemical synthesis product is calculated using the percent recovery. The ratio of actual yield to theoretical yield is used to compute percent yield. The ratio of the pure compound to the starting compound is used to calculate percent recovery.

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Answer:

8.33 hours

Explanation:

In order to solve this problem, we must apply Graham's law of diffusion in gases. Graham's law states that the rate of diffusion of a gas is inversely proportional to the square root of its vapour density. For two gases we can write;

R1/R2=√d2/d1

Where;

R1= rate of diffusion of hydrogen

R2= rate diffusion of unknown gas

d1= vapour density of hydrogen

d2= vapour density of the unknown gas

Volume of hydrogen gas = 360cm^3

Time taken for hydrogen gas to diffuse= 1 hour =3600 secs

R1 = 360 cm^3/3600 secs = 0.1 cm^3 s-1

Vapour density of unknown gas = 25

Vapour density of hydrogen = 1

Substituting values,

0.1/R2 = √25/1

0.1/R2 = 5/1

5R2 = 0.1 × 1

R2 = 0.1/5

R2= 0.02 cm^3s-1

Volume of unknown gas = 600cm^3

Time taken for unknown gas to diffuse= volume of unknown gas/ rate of diffusion of unknown gas

Time taken for unknown gas to diffuse= 600/0.02

Time= 30,000 seconds or 8.33 hours

There are 3.44 x 10^{22} particles in 0.057 moles of lithium bromide.

The lithium bromide formula also known as the lithium monobromide formula or Bromo lithium formula is explored. It is a counterion bromide-based salt of lithium.

we have to use Avogadro's constant,

Avogadro's constant, is approximately equal to 6.022 x 10^{22} particles per mole.

we can use the following formula:

number of particles = moles x Avogadro's constant

Substitute the values,

number of particles = 0.057 moles x 6.022 x 10^{23} particles/mol

Simplifying the equation

number of particles = 3.44 x 10^{22} particles

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In order to find this information, we usually use the solubility curve or solubility graph, to determine how much of a solute will be soluble with the change in temperature in 100 grams of water, if the amount of solute we add is less than that, we have an unsaturated solution, if it is exactly on the line, we have a saturated solution, and if is above the line, we have a supersaturated solution. At 20°C, 40 grams of KCl will be classified as supersaturated, as it is above the solubility line

Answer:

Explanation: Tissue if I'm not mistaken

A group of a similar cells that perform a particular function is called a tissue.

This is the aggregation of cells which have the same type of structure and therefore performs the same type of function through what is referred to as cell specialization.

The organ is also formed from the aggregation of tissues and is necessary so as to ensure that biochemical activities in the body are performed optimally.

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Answer:

Zn(s) + CuSO4(aq) -----> ZnSO4(aq) + Cu(s)

Na2CO3 (aq)+ 2AgClO4(aq) → 2NaClO4(aq) + Ag2CO3(s)

2Al(s) + 6HI(aq) ------> 2AlI3(aq) + 3H2(g)

C12H22O11(s)+H2O(l)→4C2H5OH(aq)+4CO2(g)

2K(s) + 2H2O(l) ------->2KOH(aq) + H2(g)

Explanation:

In the first reaction, zinc displaces copper from an aqueous copper II salt since zinc is higher than copper in the electrochemical series.

Reaction two leads to the precipitation of silver carbonate. Remember that carbonates are mostly insoluble in water.

Acids are known to displace hydrogen gas from dilute acids. Hence in the third reaction, aluminum displaced hydrogen from aqueous hydroiodic acid.

In the fourth reaction, the action of yeast leads to the fermentation of sucrose yielding ethanol and carbon dioxide in the process.

Metals are known to form aqueous alkaline solutions liberating hydrogen gas when they react with water. Hence potassium metal reacts with water to liberate hydrogen gas and form alkaline potassium hydroxide.

EXPLANATION:

PART

Soda drink is a mixture

PART B

Soda drink is a mixture and not a compound. This is because it contains different constituents and they are mixed together in the right proportion. Also, the composition of the constituents is uniform throughout the mixture.

Answer:

I'd pick B, because gravity acts in between all object WITHOUT contact to each other. Gravity is all around us, we make contact with certain materials we use everyday, but objects don't contact to gravity. In certain terms, scientists are still not sure the REAL meaning of gravity, just how it works.

Explanation:

Pick B.

Answer:

I'd think it'd be B, because gravity acts between all objects without making contact.

Explanation:

Answer:

41.9(w/w) %

Explanation:

Based on the reaction:

Na₂C₂O₄(s) + 2HCl(aq) → H₂C₂O₄(aq) + 2NaCl(aq)

Where 1 mole of sodium oxalate reacts with 2 moles of HCl

Moles of HCl solution to reach end point are:

44.15mL = 0.04415L ₓ (0.250mol / L) = 0.01104 moles of HCl

As 2 moles of HCl reacts per mole of Na₂C₂O₄:

0.01104mol HCl ₓ (1 mol Na₂C₂O₄ / 2 mol HCl) = 5.519x10⁻³ moles Na₂C₂O₄ are in the sample.

Molar mass of Na₂C₂O₄ is 134g/mol; thus, mass of 5.519x10⁻³ moles Na₂C₂O₄ is:

5.519x10⁻³ moles Na₂C₂O₄ ₓ (134g / mol) = 0.740g of Na₂C₂O₄ in the sample.

Thus, percent by mass of sodium oxalate in the sample is:

0.740g of Na₂C₂O₄ / 1.766g ₓ 100 =

Answer:

  -172.6 °C

Explanation:

You want to know the Celsius equivalent of the temperature 100.6 K.

The relation is ...

  C = K - 273.15

  C = 100.6 -273.15 = -172.55

The temperature is -172.55 °C, about -172.6 °C.

__

Additional comment

We have rounded to tenths, because that is precision of the temperature given. If you use 273 as the conversion constant, you will get -172.4.

The final temperature of the water is: T_final = 45.0°C

We can use the formula for the specific heat capacity of the water to solve this problem:

q = mcΔT

First, we can calculate the initial energy of the water:

q = mcΔT

q = (10.0 g) (4.184 J/g°C) (25.0°C)

q = 1,046 J

Next, we can calculate the final temperature after absorbing 840 J:

q = mcΔT

840 J = (10.0 g) (4.184 J/g°C) (ΔT)

ΔT = 20.0°C

Therefore, the final temperature of the water is:

T_final = T_initial + ΔT

T_final = 25.0°C + 20.0°C

T_final = 45.0°C

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Determine whether each of the statements about polyprotic acids is accurate or incorrect by taking into account the ensuing inquiries. Ka1 mainly regulates the ph. for the majority of polyprotic acids.

Monoprotic acids include hypochlorite (HCl), acetone (CH3CO2H or HOAc), potassium nitrate (HNO3), and sodium benzoate (C6H5CO2H). Many significant acids fall into the category of triprotic acids, which could also lose multiple H+ ions when acting as Brnsted acids. A polyprotic acid is an acid that has several ionizable hydrogen atoms. But a polyprotic acid can donate more protons than a monoprotic acid since it contains or more one acidic H+. It does not fully dissociate since it is a weak polyprotic acid. Here are some instances of weak monoprotic acids:

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Answer:

JOSHUA

Explanation:

JOSHUA

Answer:

NaCl in water; ion-dipole interaction

Explanation:

Sodium chloride is an ionic solid. Ionic solids dissolve in water due to ion dipole interaction. Ionic solids are composed of an ion pair which are strongly bound by electrostatic interaction between the oppositely charged ions in the solid state.

When an ionic substance is dissolved in water, the positive ion interacts with the negative end of the dipole in water while the negative ion interacts with the positive end of the dipole in water. Hence the ions are pulled apart by this ion-dipole interaction and the crystal structure of the solid collapses as the ionic solid dissolves in water.

Sodium chloride is an ionic solid. Interaction between the sodium ion and the negative end of the dipole in water as well as chloride ion and the positive end of the dipole in water leads to the dissolution of sodium chloride solid in water. This is the strongest solute-solvent interaction in the list.

When The strongest solute-solvent interactions and the interaction the correct option is A NaCl in water; ion-dipole interaction

Sodium chloride is an ionic solid. Ionic solids liquefy in water due to ion-dipole interaction. Ionic solids are formed of an ion team that is strongly bound by electrostatic interaction between the differently delegated ions in the solid-state.

When an ionic substance is disbanded in water, the positive ion interacts with the negative end of the dipole in the water while the opposing ion interacts with the positive end of the dipole in water. Therefore the ions are dragged apart by this ion-dipole interaction and also when the crystal configuration of the solid collapses as the ionic solid dissolves in water.

Sodium chloride is an ionic solid. The interchange between the sodium ion and the negative future of the dipole in water as well as the chloride ion and the positive end of the dipole in water leads to the abolishment of sodium chloride solid in water. This is the strongest solute-solvent exchange on the list.

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Answer:

32

Explanation:

Answer: 86,

α-decay

Explanation:

Another team of scientists must be able to replicate the results of the experiment. Option C

A. The atomic mass of an element according to the new method must be greater than its previous measurement: This statement is not necessary for the claim to be considered valid. The new method may provide a more accurate measurement of atomic mass, which could be either greater or lesser than the previous measurement.

B. The method must work for all isotopes: This criterion is important for the claim to be valid. Atomic mass is determined by considering the mass of all isotopes and their relative abundances. If the new method only works for specific isotopes or fails to accurately account for the contributions of different isotopes, the claim may not be considered valid.

C. Another team of scientists must be able to replicate the results of the experiment: Reproducibility is a fundamental aspect of scientific research. If the results of the experiment cannot be replicated by independent scientists using the same method, it raises doubts about the validity and reliability of the claim. Therefore, this criterion is necessary for the claim to be considered valid.

D. The atomic mass of an element according to the new method must be less than its previous measurement: Similar to option A, this statement is not necessary for the claim to be valid. The new method may result in a lower or higher atomic mass measurement compared to the previous method.

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Answer:

"No" I can't calculate the solubility of X.

Explanation:

This is why the preceding solution would be the proper one.

The Fischer projection given here is for L-enantiomer and ketopentose. Option B is correct, as there is a ketone group present in the carbohydrate monomer. Carbohydrate can have an aldehyde or ketone as a functional group.

Carbohydrate monomer is a single unit that can either have an aldehyde functional group called aldose or a ketone functional group called ketose. Here in the given diagram, the monomer has a ketone group (C=O) and has five carbons, so it is considered a keto pentose. Carbohydrates are classified into L and D forms based on their OH group, and this L and D form differs from the "l" and "d" form (classified on the direction of movement around the plane polarized light).

Hence, this given diagram is L-enantiomer and keto pentose, which is option B.

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Answer:

Explanation:

It seems like you’re trying to count the number of atoms in some chemical formulas. Here’s the list of the number of each atom in the formulas you provided:

Formula 1: Н - 1 Formula 2: H - 1, O - 1 Formula 3: Н - 14 Formula 4: Н - 2, C - 3 Formula 5: I - 1 Formula 6: Н - 3 Formula 7: H - 2 Formula 8: Н - 2, C - 3, O - 1 Formula 9: Li - 1 Formula 10: Н - 2 Formula 11: Н - 2 Formula 12: H - 1 Formula 13: Н - 2, C - 2, O - 1 Formula 14: II

Answer:

Explanation:

Can you provide a picture? I can outline the reactions though. a) will make a Z double bond from a triple bond and then peroxyacid can do epoxidation. b) will make the Z double bond then ozonolysis to double bond will create to aldehyde compounds. c) is essentially useless unless there is a ketone or aldehyde in the compound already since H2/Pd will fully reduce the alkyne (which I am assuming is present) and so the peroxyacid can't do epoxidation and can only do baeyer villiger oxidation, and d) reduces the alkyne to an E alkene and then do epoxidation to give an epoxide (with trans steroechemistry)

Vanadium  and the oxide is V2O5.

We have the information that the  element which has an atomic mass between  40 and 55  reacts with oxygen. This compound must e ionic so we can write; 2M + x/2O2 --->M2Ox

Mass of oxygen utilized in the reaction is; 3.708 g - 2.077 g  = 1.631 g

Number of moles of oxygen used = 1.631 g/32g/mol = 0.051 moles

Number of moles of the metal =   2.077 g/M

Thus;

2.077 g/M  * x/4 = 0.051 moles

2.077x/4M =  0.051 moles

2.077x = 0.204M

M = 2.077x /0.204

M = 10.181x

Given that x could be 4 or 5, we have to agree that x =5 which gives a mass of  50.93 thus M is Vanadium  and the oxide is V2O5.

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The heat capacity for the metals are;

Aluminum -  0.89

Copper - 0.11

Iron - 0.44

Lead - 0.12

The specific heat of a substance is denoted by the symbol "C" and is typically measured in units of J/g·°C (joules per gram per degree Celsius) or cal/g·°C (calories per gram per degree Celsius).

The specific h

We have that;

For Aluminum;

c = 4.184 * 39.85 * 4.7/11.98 * 72.9

= 783.6/873.3

= 0.89

For Copper;

c =  4.184 * 12.14 * 1.9/12.14 * 75.4

= 96.5/915.3

= 0.11

For Iron

c =  4.184 * 40.24 * 2.4/12.31 * 75.1

= 404.1/924.5

= 0.44

For Lead

c = 4.184 * 39.65 * 0.7/12.46 * 76.7

c = 116.1/955.68

= 0.12

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Answer:

The volume of water added to make the diluted solution is 118.68 mL.

To solve this question, we'll begin by calculating the volume of the diluted solution. This can be obtained as follow:

Volume of stock solution (V₁) = 25 mL

Molarity of stock solution (M₁) = 0.250 M

Molarity of diluted solution (M₂) = 0.0435 M

Volume of diluted solution (V₂) =?

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

M₁V₁ = M₂V₂

0.25 × 25 = 0.0435 × V₂

6.25 = 0.0435 × V₂

Divide both side by 0.0435

V₂ = 6.25 / 0.0435

V₂ = 143.68 mL

Thus, the volume of the diluted solution is 143.68 mL

Finally, we shall determine the volume of water added to make the diluted solution.

Volume of stock solution (V₁) = 25 mL

Volume of diluted solution (V₂) = 143.68 mL

Volume of water added =?

Volume of water added = (Volume of diluted solution) – (Volume of stock solution)

Volume of water added = 143.68 – 25

Volume of water added = 118.68 mL

Therefore, the volume of water added to make the diluted solution is 118.68 ml