what would the ph be at the end of an enzyme-catalyzed reaction if it were carried out in a 0.1 m phosphate buffer of pka 6.86 and 0.005 m of acid was produced during the reaction

Answer:

it would be E. because it would create steam from the h2o

Answer:

2H₂ + O₂ —> 2H₂O

The coefficients are: 2, 1, 2

Explanation:

__ H₂ + __ O₂ —> __ H₂O

The above equation can be balance as illustrated below:

H₂ + O₂ —> H₂O

There are 2 atoms of O on the left side and 1 atom on the right side. It can be balance by writing 2 before H₂O as shown below:

H₂ + O₂ —> 2H₂O

There are 2 atoms of H on the left side and 4 atoms on the right side. It can be balance by writing 2 before H₂ as shown below:

2H₂ + O₂ —> 2H₂O

Now, the equation is balanced and the coefficients are: 2, 1, 2

Answer:

Hydrogen fuel cells do not produce any CO2 emissions during operation, even if their production is not necessarily carbon-free. This gives them an advantage over combustion engine vehicles, which can emit small amounts of poisonous carbon monoxide and require well-ventilated rooms for indoor use.

Answer:

It transports nutrients and waste in the body

It regulates body temperature

Explanation:

Water can be regarded as one of the basic substance needed by biological organism to survive, and for growth of vegetation. Biological process such as regulation of body temperature and transportation of nutrients into the body's blood for growth of different organisms is been aided by water.

Answer:

A, B, and D

Explanation:

Answer:

C6H12O2

Explanation:

The Jones reagent is a reagent in organic chemistry used to convert primary alcohols to carboxylic acids and secondary alcohols to ketones. Recall that tertiary alcohols can not be oxidized.

The compound  2-methyl-2,3-pentandiol contains one secondary and one tertiary alcohol. The secondary alcohol is oxidized to a ketone while the tertiary alcohol is not oxidized.

Hence the product of the oxidation using Jones reagent is 2-Hydroxy-2-methyl-3-pentanone with the molecular formula C6H12O2.

Answer:

insertion (addition)

Explanation:

A T was added, making the sequence shift.

Answer:

1. 2N₂ + O₂ ---> 2N₂O

2. BaCl₂ + 2NaOH ---> Ba(OH)₂ + 2NaCl

3. H₂SO₄ + 2KOH ----> K₂SO₄ + 2H₂O

4. K₂CO₃ + 2HCl ---> 2KCl + H₂O + CO₂

5. CaCO₃ + 2HNO₃ ---> Ca(NO₃)₂ + H₂O + CO₂

6. Ca + 2H₂O ---> Ca(OH)₂ + H₂

7. Pb(NO₃)₂ + 2NaI ---> PbI₂ + 2NaNO₃

8. Al₂(SO₄)₃ + 6NaOH ---> 2Al(OH)₃ + 3Na₂SO₄

9. Al(OH)₃ + NaOH ---> NaAlO₂ + 2H₂O

10. 2Pb(NO₃)₂ ---> 2PbO + 4NO₂ + O₂

Explanation:

A balanced equation of a chemical reaction is one that has the number of moles of atoms of each element taking part in the reaction equal on both sides of the reaction, that is on the reactants and products sides of the reaction.

The balanced equations of the given reactions is as follows:

1. 2N₂ + O₂ ---> 2N₂O

2. BaCl₂ + 2NaOH ---> Ba(OH)₂ + 2NaCl

3. H₂SO₄ + 2KOH ----> K₂SO₄ + 2H₂O

4. K₂CO₃ + 2HCl ---> 2KCl + H₂O + CO₂

5. CaCO₃ + 2HNO₃ ---> Ca(NO₃)₂ + H₂O + CO₂

6. Ca + 2H₂O ---> Ca(OH)₂ + H₂

7. Pb(NO₃)₂ + 2NaI ---> PbI₂ + 2NaNO₃

8. Al₂(SO₄)₃ + 6NaOH ---> 2Al(OH)₃ + 3Na₂SO₄

9. Al(OH)₃ + NaOH ---> NaAlO₂ + 2H₂O

10. 2Pb(NO₃)₂ ---> 2PbO + 4NO₂ + O₂

Answer:

See explanation

Explanation:

First of all, we have been told that Grant performed a flame test on the  unknown sample and the flame colour was found to be violet. Violet flame implies that the compound is a compound of potassium metal since potassium metal produces a violet flame.

We can see that the mass of crucible + sample decreased from 63.089 g to 62.928 g implying that the unknown sample was decomposed and some part of it may have been lost as gases.

Having this in mind, we already know that KHCO3 decomposes according to the reaction; 2 KHCO3(s) → K2CO3(s) + CO2(g) + H2O(g)

So, the unknown compound must be KHCO3. Decomposition of the compound involves the loss of H2O and CO2 as gases which accounts for the decrease in mass of crucible + unknown sample after heating.

Answer:

1710 cm^-1

Explanation:

The Infrared spectrum of the starting material  will have a peak present at 1710 cm^-1.  this is because

2-methylcyclohexanone has a ketone group (C=O) which will be  reduced to an alcohol group (O-H), in the product i.e. (2-methylcyclohexanol). therefore the peak for the stretching vibration of the ketone carbonyl (C=O) is present only in the starting material only .and  The peak for the stretching is at 1710 cm^-1

Answer:

increase

Explanation:

waves pounding the base of the cliff

Answer:

Waves pounding off the base of the cliff

Explanation:

Answer:

1.713465698558547

Explanation:

the SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Nitrogen, or 14.0067 grams

Answer:

890.6

Explanation:

(477°C × 9/5) + 32 = 890.6°F

Explanation:

the atmoc radius across the period

Explanation:

If a large photon strikes the surface, that has enough strength to take out an electrode, which will then travel to the positive side since it is negative. Current is flowing at this stage. Since the reduced photons will be unable to distinguish between atoms, no power can pass.

Answer:

B) valence electrons.

Explanation:

Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, this property is typically used to determine the chemical properties of elements.

For example, oxygen has a total number of eight (8) electrons while neon has total number of ten (10) electrons. Therefore, an atom of oxygen is able to gain (receive) two (2) more electrons in order to have the same electron arrangements as the noble gas i.e an atom of neon with an atomic number of 10.

Basically, each free electrons (valence electrons) produces a covalent bond.

Hence, single, double, or triple covalent bonds in a carbon atom are formed from valence electrons.

Single, double, or triple covalent bonds in a carbon atom are formed from Valency electrons.

The valency electron are the electrons found in the outermost shell of an

atom.

The valency electron of an atom determines the kind of bonding that exist in

an element .

Neutral Carbon atoms has 6 electrons . The number of valency electrons

(electrons in the outermost shell) in Carbon is 4 valency electrons.

So, carbon can form covalent bond by sharing electrons  with other atom of

an element. The bonding maybe single, double or triple bonds .

This bonding are formed by the electrons in the outermost shell(valency electrons)

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Answer: b 36 g

Explanation:

Answer:

the number of carbon atoms in the longest possible continuous carbon chain also known as parent chain chosen by a set of rules.

Explanation:

Answer:

It indicates the number of carbon atoms in the longest possible continuous carbon chain also known as parent chain chosen by a set of rules.

Hope this helps you. Do mark me as brainliest.

Answer:

Follows are the solution to this question:

Explanation:

Please find the image file of the chemical reaction in the attachment:

In a water medium, the CH3- type CH 3Li is a heavy nucleophile that attacks the carbonyl carbon atom to form the alkoxide ion, which will then be protonated to form alcohol.

Answer:

The correct answer is - water acts as a ligand that splits d orbitals.

Explanation:

Hydrated CuSO4 has a central metal (Cu) surrounded by the water molecules, here water molecules play a role of the ligands that causes the splitting of d-orbitals. This splitting brings d-d transition and emits the blue color of Cu in the visible light.

Anhydrous CuSO4 on other hand is colorless due to the lack of molecules of ligand that makes splitting of d orbitals impossible so no transition of d-d orbitals takes place and no emission of color.

Answer: It will take 9.13 minutes for the sample.

Explanation:

Expression for rate law for first order kinetics is given by:

[tex]t=\frac{2.303}{k}\log\frac{a}{a-x}[/tex]

where,

k = rate constant  

t = age of sample

a = initial amount of the reactant = [tex]2.81\times 10^4[/tex]

a - x = amount left after decay process = [tex]3.52\times 10^3[/tex]

a) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

[tex]t_{\frac{1}{2}}=\frac{0.693}{k}[/tex]

[tex]k=\frac{0.693}{3.05min}=0.227min^{-1}[/tex]

b) for activity to decrease from 2.81E4 Ci to 3.52E3 Ci:

[tex]t=\frac{2.303}{0.227}\log\frac{2.81\times 10^4}{3.52\times 10^3}[/tex]

[tex]t=9.13min[/tex]

Thus it will take 9.13 minutes for the sample.

[tex]t_{99.9}=40min[/tex]

The time after which 99.9% reactions gets completed is 40 minutes

Explanation:

acid --> HCN

base --> KCN

now

another base NaOH is added

we know that

base will react with an acid

so

OH- + HCN ---> CN- + H20

we can see that

HCN is used up , so number of moles of HCN will decrease

CN- is being formed , so number of moles of CN- will increase.

A  false

B  false

C  false

D  true

E  false

The volume in milliliters of calcium hydroxide solution required to neutralize 75.0 mL of 0.0300 M HCl is 173.1mL

HOW TO CALCULATE MOLARITY:

C1V1 = C2V2

Where;

According to this question,

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Answer:

I t transfers from the ocean to the air, however the current is not as warm so less energy will transfer from the current to the air making ChrisstChurch cooler than usual.

Answer:

0.0011 moles

Explanation:

Recall that;

Number of moles = mass of substance/ molar mass of the substance

Mass of asprin = 0.2001 g

Molar mass of asprin = 180.158 g/mol

Number of moles =  0.2001 g/180.158 g/mol

Number of moles = 0.0011 moles