Answer:
-- the active site contains a serine residue, an unprotonated histidine, and an unprotonated aspartate residue at pH 7.0 prior to binding the substrate.
-- attack of a water molecule on the acyl-enzyme intermediate yields the second product.
-- an acetyl-enzyme intermediate forms during the mechanism.
Explanation:
p-Nitrophenyl acetate is a chemical compound and is used as a substrate in the assays for esterase as well as lipase activity.
Doing hydrolysis of the p-nitrophenyl acetate releases a p- nitrophenol, and its absorbance can be monitored at about 405 nm.
In doing hydrolysis of the p-nitrophenyl acetate by a chymotrypsin, the following holds true :
By hydrolysis, the acetyl enzyme intermediate is formed.an attack of the water molecule on acyl enzyme yields a second productthe site consists of a serine residue, unprotonated aspartate and an unprotonated histidine residue at pHThe specific heat capacity of water is 4.186 J/g °C
Calculate the temperature change when 8000 J of heat is added to 3g of water.
Use the equation q=mcT
Answer:
Solution given:
specific heat capacity of water [c]4.186 J/g °C
temperature[∆T]=?
mass[m]=3g
heat[Q]=8000J
we have
Q=mc∆T
8000=3*4.186*∆T
∆T=8000/12.558
∆T=637.04°C
the temperature change is 637.04°C.
Write a neutralization reaction to form the salt k2so4
H2SO4 + 2KCL ----------› K2SO4 + 2HCL
hope it helps you ♡♡
Complete the missing information in the reactions. Then, label each reaction as Alpha
(a) or Beta (B) decay.
14
0
N
9
Type: :
n:
p:
n:
p:
n:
P:
238
U
10. 92
234
Th
90
+
Type: :
n:
n:
p:
n:
p:
I
p:
0
32
11 15
P
Type: :
n:
n:
n:
p:
P:
P:
4
244
Pu
12 94
He
Type:
n:
n:
n:
p
p:
p:
Answer:
rtyuioroiytryu
Explanation:
Lithium chloride + Iron → ?
Answer:
Lithium chloride + Iron
No reaction takes place, because lithium is more reactive than iron, so Iron cannot displace lithium from its solution.
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What volume of O2 at STP is required to oxidize 8.0 L of NO at STP to NO2? What volume of NO2 is produced at STP?
The balanced equation of the reaction is:
[tex]O_2 + 2 NO[/tex] ⇒ [tex]2 NO_2[/tex]
Every gas occupied 24 L in one mole in r.t.p. according to the equation:
[tex]24 \times n = V[/tex]
8/24=0.333 mol
2 moles of NO makes 2 moles of [tex]NO_2\\[/tex] so
0.333*24=8L
ano ang kahulugan ng sekswalidad?
ano ang naakit sa isang tao..at kung ano ang iyong kasarian ay
When you perform a stoichiometry calculation, you are determining the ...
A) actual yield
B) theoretical yield
C) percent yield
Answer:
B) Theoretical
Explanation:
Just did the question
Which is the correctly balanced chemical equation for the reaction of KOH and H2SO4? Which is the net ionic equation for the reaction?
Answer:
See explanation
Explanation:
A balanced chemical reaction equation has the same number of atoms of each element on both sides of the reaction equation.
Hence, for the reaction between KOH and H2SO4, the balanced chemical reaction equation is;
H2SO4(aq) + 2KOH(aq) ---------> K2SO4(aq) + 2H2O(l)
Complete ionic equation;
2H^+(aq) + SO4^2-(aq) + 2K^+(aq) +2OH^-(aq) -------> SO4^2-(aq) + 2K^+(aq) + 2H2O(l)
Net ionic equation;
2H^+(aq) + 2OH^-(aq) -------> 2H2O(l)
what is used to observe things, like cells, that are too small to see with the naked eye.
Answer:
a microscope is used to see little things the naked eye can't
3. How many atoms in 3.91 moles of sodium?
Answer:
Explanation:
The formula for sodium is Na. It does not form a molecule in some way.
1 mol Na = 6.02*10^23 atoms
3.91 mol = x Cross multiply
x = 3.91 * 6.02 * 10^23
x = 23.65 * 10^23
x = 2.365 * 10^24
Scientific notation is always expressed as a number 1 ≤ x < 10
when electrical energy is converted into any other deform of energy, the total amount of energy
what makes a compound a pure substance
Answer:
Compounds contain more than one type of material. Yet both compounds and elements are considered pure substances.
Pure compounds are created when elements combine permanently, forming one substance
Extra:
So, a mixture can be separated into its original components, while a pure compound cannot.
When naming compounds part of the second element's name is dropped and what is added in its place?
ude
ode
ede
ide
Answer:
ide is the correct answer
Explanation:
example compound of sodium and hydrogen in sodium hydroxide
and compound of hydrogen and chlorine is hydrogen chloride
QUICK PLEASE
What is the final concentration when 275 mL of 20.0 % W/V hydrogen peroxide solution is diluted to 1.000 L?
20.0 % W/V
0.30 % W/V
55.0 % W/V
5.50 % W/V
Answer:
20.0% w/v A
Explanation:
A 20.0 w/V...
HELPPP!!!
The emission of electromagnetic energy from an atomic nucleus is called_______
decay.
Gamma decay, type of radioactivity in which some unstable atomic nuclei dissipate excess energy by a spontaneous electromagnetic process. In the most common form of gamma decay, known as gamma emission, gamma rays (photons, or packets of electromagnetic energy, of extremely short wavelength) are radiated.
Which of the following measurements contains 2 significant figures?
A 0.0240
С 0.0901
B 371
D 1.0x10
E 0.004
At the carnival, a baby was given a helium balloon whose
pressure equaled the atmospheric pressure at the carnival
which was 102.7 kPa. However, the baby wasn't paying
attention and the balloon floated away into the troposphere
where the atmospheric pressure is 97.8 kPa. What is the
positive difference between the pressure in the balloon and
the pressure of the troposphere in atm?
atm
Answer: 0.048 kPa
Explanation: no clue i just looked it up you’re welcome y’all:)
Which of the following solutions is the weakest base?
a) pH 2.3
b) pH 4.6
c) pH 6.6
d) pH 7.9
e) 12.5
Answer:
solution d with pH of 7.9
How many molecules are in 0.0230 grams of C3H6?
How is an alkoxide ion formed??
Can you please help me with this?
What happens with the evaporation of raindrops in the atmosphere?
Answer:
they become water vapor and after that, they become a type of precipitation
HNO3 + S --> H2SO4 + NO Now identify the element oxidized and the element reduced. Which element is oxidized? Which element is reduced? Which elements undergo no oxidation or reduction?
Answer: S is getting oxidized, N is getting reduced and O and H undergo no oxidation or reduction
Explanation:
The oxidation reaction is defined as the reaction in which a chemical species loses electrons in a chemical reaction. It occurs when oxidation number of a species increases.
A reduction reaction is defined as the reaction in which a chemical species gains electrons in a chemical reaction. It occurs when oxidation number of a species decreases.
For the given chemical reaction:
[tex]HNO_3+S\rightarrow H_2SO_4+NO[/tex]
On the reactant side:
Oxidation number of H = +1
Oxidation number of N = +5
Oxidation number of O = -2
Oxidation number of S = 0
On the product side:
Oxidation number of H = +1
Oxidation number of N = +2
Oxidation number of O = -2
Oxidation number of S = +6
As the oxidation number of S is increasing from 0 to +6. Thus, it is getting oxidized. Similarly, the oxidation number of N is decreasing from +5 to +2. Thus, it is getting reduced.
The oxidation numbers of O and H remain the same on both sides of the reaction. Thus, they are neither getting oxidized or reduced.
Hence, S is getting oxidized, N is getting reduced and O and H undergo no oxidation or reduction
Se tiene una solución acuosa 2M de carbonato de potasio. Expresar su concentración en %p/v y Normalidad.
Answer:
Normalidad = 4N
%p/V = 27.6%
Explanation:
La solución 2M de carbonato de potasio contiene 2moles de carbonato por litro de solución. La normalidad son los equivalente de carbonato de potasio (2eq/mol) por litro de solución:
2moles * (2eq/mol) = 4eq / 1L = 4N
El porcentaje peso volumen es el peso de carbonato en gramos dividido en el volumen en mL por 100:
%p/V:
Masa K2CO3 -Masa molar: 138.205g/mol-
2moles * (138.205g/mol) = 276g K2CO3
Volumen:
1L * (1000mL/1L) = 1000mL
%p/V:
276g K2CO3 / 1000mL * 100
%p/V = 27.6%If you sprain your ankle and place a cold pack on it, how does the motion of molecules in your ankle change?
Answer:
that heat energy speeds up the motion of the particles and the temperature of the reaction
Explanation:
HOPE IT HELPS
When we place an ice pack on a sprained ankle, the blood flow is reduced which prevents further swelling, ice reduces the blood flow which is necessary when the ankle is injured.
What happens after placing an ice pack?The flow of blood and the lymph vessel is limited or decreased after applying an ice pack, this is an immediate first aid to be given to the injured person
After 2-3 days of the injury, a hot pack should be applied to increase the blood flow and the lymph flow for an activity.
Hence, the molecule flow is reduced after applying an ice pack to the sprained ankle
learn more about molecules
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Help pleaseeee
you wish to make a potassium carbonate solution with a molar concentration of 0.25mol/dm³,but you only have 11.7g of potassium carbonate. what is the maximum volume of solution you can make?
Answer:
0.337 dm³
Explanation:
M(K2CO3) = 138.2 g/mol
1) 11.7 g * (1 mol/138.2 g) =0.08466 mol
2) 0.08466 mol * (1 dm³/0.25 mol) = 0.3386 dm³ ≈ 0.337 dm³
Si de una caja de gelatina de 30g, se obtiene 5 porciones. Cuantas cajas y cuantos gramos se requieren para preparar 100 porciones.? respuestas concretas por fis
Answer:
20 cajas - 600 gramos
Explanation:
Veamos los datos informados:
1 caja → 5 porciones
1 caja → 30 g
Si queremos preparar 100 porciones, indudablemente necesitamos:
100 porciones . 1 caja / 5porciones = 20 cajas
Finalmente ya sabemos que una caja tiene 30 g
Entonces, si tenemos 20 cajas . 30 g / 1 caja = 600 g
En conclusión:
Necesitamos una masa total de 600 gramos en 20 cajas
If you took 800mg of aspirin tablet at 12:00pm and another 800mg tablet at 2pm, how many milligrams of aspirin are still in your system at 3pm? Aspirin has a t1/2 of 1 hour.
Don't you dare put a link. I have a very specific set of skills >.>
(Chemistry is unfortunately not one of them though, so please help me ^-^)
Answer:
100mg are in your system at 3pm
Explanation:
Half-life is the time necessary to decrease the initial amount of a substance in the half.
At 12:00pm, the amount of aspirin is 800mg
As half-life is 1h,
at 1:00pm, the amount of aspirin is 800mg/2 = 400mg
At 2:00pm, 400mg/2 = 200mg
At 3:00pm, 200mg/2 =
100mg are in your system at 3pmWhat are the units for the Volume of any Polyhedron?
Explanation:
A prism is a polyhedron with two parallel, congruent faces called bases that are polygons . The volume of a 3 -dimensional solid is the amount of space it occupies. Volume is measured in cubic units ( in3,ft3,cm3,m3 , et cetera).
Answer:
A cube with side length 1 unit, called a “unit cube,” is said to have “one cubic unit” of volume, and can be used to measure volume.
Which statement about Niels Bohr’s atomic model is true?
Answer:
Each orbit has a specific energy level.
Would you mind marking it the brainliest:).
How many moles are in 3.90 x1030 atoms of Zn?