Answer:
oxygen
Explanation:
The enzyme Y catalyzes the elementary reaction
AB→A+B
An enzyme concentration of 1.0 μM Y can convert a maximum of 0.5 μM AB to the productsA and B per second. Note: Since the concentrations of species in the cytoplasm of cells is small, the concentration unit of micromolar (μMor 10−6 M) is used for consistency with biochemical systems.
Six solutions are made, each with a Y concentration of 1.0 μM and varying concentrations of AB as shown below. Based on the concentrations, rank the solutions in decreasing order of reaction rate.
a) 0.2 uM AB
b) 0.3uM AB
c) 0.6 uM AB
d) 0.4 uM AB
e) 0.7uM AB
f) 0.5 uM AB
Answer:
0.7μM = 0.6 μM = 0.5 μM > 0.4 μM > 0.3 μM > 0.2 μM
Explanation:
An enzyme solution is saturated when all the active sites of the enzyme molecule are full. When an enzyme solution is saturated, the reaction is occurring at the maximum rate.
From the given information, an enzyme concentration of 1.0 μM Y can convert a maximum of 0.5 μM AB to the products A and B per second means that a 1.0 M Y solution is saturated when an AB concentration of 0.5 M or greater is present.
The addition of more substrate to a solution that contains the enzyme required for its catalysis will generally increase the rate of the reaction. However, if the enzyme is saturated with substrate, the addition of more substrate will have no effect on the rate of reaction.
Therefore the reaction rates at substrate concentrations of 0.7μM, 0.6 μM, and 0.5 μM are equal. But the reaction rate at substrate concentrations of 0.2 μM is lower than at 0.3 μM, 0.3 μM is lower than 0.4 μM and 0.4 μM is lower than 0.5 μM, 0.6 μM and 0.7 μM.
The solutions in decreasing order of reaction rate will be:
0.7μM = 0.6 μM = 0.5 μM > 0.4 μM > 0.3 μM > 0.2 μM
What is an Enzyme solution?It is saturated when all the active sites of the enzyme molecule are full. When an enzyme solution is saturated, the reaction is occurring at the maximum rate.
From the given information, an enzyme concentration of 1.0 μM Y can convert a maximum of 0.5 μM AB to the products A and B per second means that a 1.0 M Y solution is saturated when an AB concentration of 0.5 M or greater is present. If the enzyme is saturated with substrate, the addition of more substrate will have no effect on the rate of reaction.
Therefore, the reaction rates at substrate concentrations of 0.7μM, 0.6 μM, and 0.5 μM are equal. But the reaction rate at substrate concentrations of 0.2 μM is lower than at 0.3 μM, 0.3 μM is lower than 0.4 μM and 0.4 μM is lower than 0.5 μM, 0.6 μM and 0.7 μM.
Thus, the solutions in decreasing order of reaction rate will be:
0.7μM = 0.6 μM = 0.5 μM > 0.4 μM > 0.3 μM > 0.2 μM
Find more information about Reaction rate here:
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What is the volume at STP, in liters, occupied by 26.4 g of F2 gas?
Answer:
volume = 15.568dm³
Explanation:
n = mass/molar mass
n = 26.4/38
n = 0.675mole
0.695 = volume/22.4dm³
volume = 15.568dm³
1. The atomic number of an element is 23 and its mass number is 56. a. How many protons and electrons does an atom of this element have? b. How many neutrons does this atom have?
Answer:
There are 23 protons and 23 electrons. We know this because atomic number denotes the number of protons and also electrons. There are 56 - 23 = 33 neutrons because atomic mass denotes the total number of protons and neutrons.
The table lists some organelles and functions. Only one pair is correctly matched. Functions of Organelles Organelle Function Chloroplast Stores water and waste materials Cell wall Supports cell membrane, maintains cell shape, and protects cell Cell membrane Breaks down waste materials and debris Vacuole Produces proteins for the cell Which organelle in the table is correctly matched with its function? chloroplast cell wall cell membrane vacuole plz help soon
The organelle that is matched correctly is the Cell Wall
The cell wall functions as a protective organelle as well as gives shape to the cell.
Functions of the cell wallThe cell wall is an organelle found in prokaryotic cells and plant cells.
Cell walls generally function to protect the cell by delimiting its surroundings the membrane from damage.
They also act as permeable structures to substances as well as give the respective cells their characteristic shapes.
More on cell walls can be found here: https://brainly.com/question/965751
how many atoms are in 2.10 g of K? molar mass of K=39.10g/mole.
Answer:
The answer is option BExplanation:
To calculate the number of atoms we must first calculate the number of moles
Molar mass = mass / number of moles
number of moles = mass / Molar mass
Molar mass (K) = 39.10mole
mass = 2.10g
number of moles = 2.10/ 39.10
= 0.0537mol
After that we use the formula
N = n × L
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10^23 entities
Number of K atoms is
N = 0.0537 × 6.02 × 10^13
N = 3.23×10^22 atoms of KHope this helps you.
Use enthalpies of formation to determine the ΔHreaction for the reaction
CaCl2(s)---> CaCl2(aq).
Answer:
The enthalpy is increased by the increased heat of the reaction.
Explanation:
In this reaction, as the transition from solid to liquid state, enthalpy increases, that is, the heat applied to change its state is greater and this increases, reaching a mayor disorder.
If the reaction increases its heat, and a liquid state passes, the enthalpy increases, therefore the disorder also and the entropy will also be increased.
Which question can be tested scientifically?
An ion of the element oxygen (O) has an overall charge of 2−. Therefore, the number of electrons in this oxygen ion is An ion of the element oxygen (O) has an overall charge of 2−. Therefore, the number of electrons in this oxygen ion is ______
Answer:
The answer is 10
Explanation:
HELP ASAP PLEASE. What stress would shift the equilibrium position of the following system to the right? N2O3(g) ⇌ NO(g) + NO2(g); ΔH is positive Increasing the concentration of N2O3 Heating the system Adding a catalyst Decreasing the concentration of NO
Answer:
there is no change because when you remove NO it will make the reaction balance
Answer:
B: Heating the system
Explanation:
took test
When Mendel crosses a plant with Greenpeace and a plant with yellow peas what color did the offspring have
Answer:
Yellow Peas
Explanation:
Answer:
yellow
Explanation:
Aqueous hydrobromic acid will react with solid sodium hydroxide to produce aqueous sodium bromide and liquid water . Suppose 34. g of hydrobromic acid is mixed with 11.4 g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction
Answer:
5.13g of H2O.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is given below:
HBr(aq) + NaOH(aq) —> NaBr(aq) + H2O(l)
Next, we shall determine the masses of HBr and NaOH that reacted and the mass of H2O produced from the balanced equation.
This is illustrated below:
Molar mass of HBr = 1 + 80 = = 81g/mol
Mass of HBr from the balanced equation = 1 x 81 = 81g
Molar mass of NaOH = 23 + 16 + 1 = 40g/mol
Mass of NaOH from the balanced equation = 1 x 40 = 40g
Molar mass of H2O = (2x1) + 16 = 18g/mol
Mass of H2O from the balanced equation = 1 x 18 = 18g
Thus, from the balanced equation above,
81g of HBr reacted with 40g of NaOH to produce 18g of H2O.
Next, we shall determine the limiting reactant. This is illustrated below:
From the balanced equation above,
81g of HBr reacted with 40g of NaOH.
Therefore, 34g of HBr will react with = (34 x 40)/81 = 16.79g of NaOH.
From the calculations made above, we can see that it will take a higher mass (i.e 16.79g) of NaOH than what was given (i.e 11.4g) to react completely with 34g of HBr.
Therefore, NaOH is the limiting reactant and HBr is the excess react.
Finally, we can determine the maximum mass of H2O produced as shown below.
In this case the limiting reactant will used because it will produce the maximum mass of H2O since all of it is consumed in the reaction.
The limiting reactant is NaOH and the maximum mass of H2O produced can be obtained as follow:
From the balanced equation above,
40g of NaOH reacted to produce 18g of H2O.
Therefore, 11.4g of NaOH will react to produce = (11.4 x 18)/40 = 5.13g of H2O.
Therefore, the maximum mass of H2O produced from the reaction is 5.13g.
When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpacking trip and will need to boil 35 L of water for your group. What volume of fuel should you bring? Assume that the fuel has an average formula of C7 H16 , 15% of the heat generated from combustion goes to heat the water (the rest is lost to the surroundings), the density of the fuel is 0.78 g>mL, the initial temperature of the water is 25.0 °C, and the standard enthalpy of formation of C7 H 16 is -224.4 kJ>mol.
Answer:
2.104 L fuel
Explanation:
Given that:
Volume of water = 35 L = 35 × 10³ mL
initial temperature of water = 25.0 ° C
The amount of heat needed to boil water at this temperature can be calculated by using the formula:
[tex]q_{boiling} = mc \Delta T[/tex]
where
specific heat of water c= 4.18 J/g° C
[tex]q_{boiling} = 35 \times 10^{3} \times \dfrac{1.00 \ g}{1 \ mL} \times 4.18 \ J/g^0 C \times (100 - 25)^0 C[/tex]
[tex]q_{boiling} = 10.9725 \times 10^6 \ J[/tex]
Also; Assume that the fuel has an average formula of C7 H16 and 15% of the heat generated from combustion goes to heat the water;
thus the heat of combustion can be determined via the expression
[tex]q_{combustion} =- \dfrac{q_{boiling}}{0.15}[/tex]
[tex]q_{combustion} =- \dfrac{10.9725 \times 10^6 J}{0.15}[/tex]
[tex]q_{combustion} = -7.315 \times 10^{7} \ J[/tex]
[tex]q_{combustion} = -7.315 \times 10^{4} \ kJ[/tex]
For heptane; the equation for its combustion reaction can be written as:
[tex]C_7H_{16} + 11O_{2(g)} -----> 7CO_{2(g)}+ 8H_2O_{(g)}[/tex]
The standard enthalpies of the products and the reactants are:
[tex]\Delta H _f \ CO_{2(g)} = -393.5 kJ/mol[/tex]
[tex]\Delta H _f \ H_2O_{(g)} = -242 kJ/mol[/tex]
[tex]\Delta H _f \ C_7H_{16 }_{(g)} = -224.4 kJ/mol[/tex]
[tex]\Delta H _f \ O_{2{(g)}} = 0 kJ/mol[/tex]
Therefore; the standard enthalpy for this combustion reaction is:
[tex]\Delta H ^0= \sum n_p\Delta H^0_{f(products)}- \sum n_r\Delta H^0_{f(reactants)}[/tex]
[tex]\Delta H^0 =( 7 \ mol ( -393.5 \ kJ/mol) + 8 \ mol (-242 \ kJ/mol) -1 \ mol( -224.4 \ kJ/mol) - 11 \ mol (0 \ kJ/mol))[/tex]
[tex]\Delta H^0 = (-2754.5 \ \ kJ - 1936 \ \ kJ+224.4 \ \ kJ+0 \ \ kJ)[/tex]
[tex]\Delta H^0 = -4466.1 \ kJ[/tex]
This simply implies that the amount of heat released from 1 mol of C7H16 = 4466.1 kJ
However the number of moles of fuel required to burn [tex]7.315 \times 10^{4} \ kJ[/tex] heat released is:
[tex]n_{fuel} = \dfrac{q}{\Delta \ H^0}[/tex]
[tex]n_{fuel} = \dfrac{-7.315 \times 10^{4} \ kJ}{-4466.1 \ kJ}[/tex]
[tex]n_{fuel} = 16.38 \ mol \ of \ C_7 H_{16[/tex]
Since number of moles = mass/molar mass
The mass of the fuel is:
[tex]m_{fuel } = 16.38 mol \times 100.198 \ g/mol}[/tex]
[tex]m_{fuel } = 1.641 \times 10^{3} \ g[/tex]
Given that the density of the fuel is = 0.78 g/mL
and we know that :
density = mass/volume
therefore making volume the subject of the formula in order to determine the volume of the fuel ; we have
volume of the fuel = mass of the fuel / density of the fuel
volume of the fuel = [tex]\dfrac{1.641 \times 10^3 \ g }{0.78 g/mL} \times \dfrac{L}{10^3 \ mL}[/tex]
volume of the fuel = 2.104 L fuel
PLS HELPP!!Which accurately describes one impact of the atmosphere on Earth’s cycles?
Answer:
The correct option is;
Produces wind currents
Explanation:
The Earth's atmosphere which comprises the gases surrounding the Earth when heated up by the heating effect of the Sun creates winds such as land and sea breezes
The kind of forces that produce land and sea breezes results in wind patterns globally that affect climate. The curving masses of air due to the rotation of the Earth results in coriolis effect and trade winds that determines the cyclic (annual) seasons and weather.
Answer: A
Explanation:
Produces wind currents
(Can someone please help me...im literally done with brainly...) Which answer best completes the following sentence? _____ is an example of physical change while _____ is an example of a chemical change. (1 point) Freezing water, boiling nitrogen Breaking a pencil, rusting of iron Burning wood, dissolving salt in water Bending a piece of aluminum, condensing water vapor
Answer:
(1) breaking a pencil (2) rusting of iron
Explanation:
breaking a pencil does not alter the chemical properties of the pencil, it merely breaks it into 2 while the rusting of iron is changing the properties chemically because the iron is oxidizing and reacting with the water and oxygen in the atmosphere
In the reaction below green chlorine gas and brown iodine chloride forms yellow iodine trichloride Cl2 (g) + ICl (l) ⇌ ICl3 (s) If more iodine trichloride is added to the reaction, how will it affect the color of the mixture? A. It will become more brown and yellow B. It will become more green and brown C. It will become more yellow and green. D. It will not change.
Answer:
B. It will become more green and brown
Explanation:
Le Chateliers principle states that when a constraint such as change in concentration, volume, pressure or temperature is imposed on a reaction system at the equilibrium, the equilibrium position will shift in such a way as to annul the constraint. Let us see how this applies to the equation under consideration.
If the system is at equilibrium and more ICl3 is added to the system, the equilibrium will shift towards the left hand side (more reactants are formed). This implies that the colour of the system will become more green and brown since there are more reactants now in the system.
How is protenin in milk broken down in our digestive system
Answer:
when we drink the milk the digestive system produce protease enzyme to break down the protein of milk.
Calculate the molar mass of aluminum oxide (Al2O3). Express your answer to four significant figures.
The molar mass of Al2O3 is
Answer:
102.0 g/mol.
Explanation:
Aluminum oxide or Al2O3 is a chemical compound composed of 3 Oxygen and 2 aluminum atoms. Naturally, it is present in the form of mineral corundum in crystalline polymorphic forms. It holds significant importance in the preparation of Aluminium metal that is used as a refractory material.
To calculate the molar mass of Aluminum oxide, we will add the molar mass of 2 Al and 3 O atoms.
Since molar mass of Al is: 26.98 g
Molar mass of O is: 16.00 g
Molar mass of Al2O3
= (26.98)2 + (16.00) 3
= 53.96 + 48
= 101.96 g/mol
Since it is mentioned in question to round off the answer upto 4 significant figures, it will make the answer: 102.0 g/mol.
I hope it helps!
Answer:
102 grams/mol
Explanation:
This is correct! :)
Write the state symbol for chlorine at room temperature.
Cl2 (___)
Explanation:
The element " chlorine" is a yellowish-green gas at room temperature
The state symbol for Chlorine at room temperature is (g). It has been present in the gaseous state at room temperature.
Chlorine has been a halogen element with an atomic number 17. The element has 7 valence electrons that made it acquire 1 electron in order to attain the stable noble gas configuration. Hence, Chlorine has been a reactive element.
The chlorine has been present as a diatomic molecule at room temperature. It has nonpolar covalent bonds. The melting and boiling point of an element decides the state of the element. The chlorine has been a simpler molecule and is present in the gaseous state at room temperature.
For more information about the chlorine, refer to the link:
https://brainly.com/question/14962130
Which statement is true regarding carbonic acid (H 2CO 3)? If body fluids are too alkaline, carbonic acid is excreted through the respiratory system in the form of carbon dioxide and water. If body fluids are too alkaline, carbonic acid is retained through the respiratory system in the form of carbon dioxide and water. If body fluids are too acidic, carbonic acid is retained through the respiratory system in the form of carbon dioxide and water. If body fluids are too acidic, carbonic acid is excreted through the respiratory system in the form of carbon dioxide and water.
Answer:
the correct option is : If body fluids are too acidic, carbonic acid is excreted through the respiratory system in the form of carbon dioxide and water.
Explanation:
Metabolic acidosis is compensated by two systems, the renal and respiratory systems.
In the case of the respiratory system, the mechanism it uses to compensate for this phenomenon is to release the carbonic acid molecule dissociated into its components, that is, in the form of water and carbon dioxide.
The greater the acidosis, the more hyperventilation the person will have, and this is because they seek to eliminate carbonic acid more efficiently and quickly, along with renal excision.
The metabolic acidosis generated by carbonic acid is lethal, since the proteins in our body are denatured and the homeostasis of all systems is corrupted.
Element Y has 8 shells.
The first three successive ionisation energies for element y increase gradually but the 4th ionisation energy increases sharply.
a)write electronic configuration for
elment Y & explain.
Answer:
electronic configuration of Y is 1s²2s²2p⁶3s²3px²3py²3pz¹
Explanation:
The electronic structure of chlorine is 1s²2s²2p⁶3s²3px²3py²3pz¹. The first two electrons are coming from pairs in the 3p levels and are therefore rather easier to remove than if they were unpaired
which statement describes suchitas final diagram
Answer:
Explanation:
The initial chemical energy is 50 J. The arrow for heat is the widest output arrow. The arrow for chemical energy is the shortest output arrow.
What is the mass of 1.84 mol NaCl? Give your answer to the correct number of significant figures. (Molar mass of NaCl = 58.44 g/mol) 1.84 mol NaCl = g NaCl
Answer:
108
Explanation:
Correct on edg2020
Answer:
108
Explanation:
1.84 mol NaCl times 58.44 g NaCl all over 1 mol NaCl= 108g NaCl.
The Mol NaCl from the 108 cancles the mol NaCl from the one, leaving the 58.44 g mol NaCl.
1.84 times 58.44 g NaCl= 107.5=108
how much energy is required to melt 2 kg of copper?
Calculate mass of 2 molecules of H2O(water) ?
Answer:
36
Explanation:
H - 1
O - 16
H2O = 2(1) + 16 = 18
2(H2O) = 36
A 0.4647-g sample of a compound known to contain only carbon, hydrogen, and oxygen was burned in oxygen to yield 0.01962 mol of CO2 and 0.01961 mol of H2O. The empirical formula of the compound was found to be C3H6O2
Answer:
The essence including its given problem is outlined in the following segment on the context..
Explanation:
The given values are:
Moles of CO₂,
x = 0.01962
Moles of water,
[tex]\frac{y}{2} =0.01961[/tex]
[tex]y=2\times 0.01961[/tex]
[tex]=0.03922[/tex]
Compound's mass,
= 0.4647 g
Let the compound's formula will be:
[tex]C_{x}H_{y}O_{z}[/tex]
Combustion's general equation will be:
⇒ [tex]C_{x}H_{y}O_{z}+x+(\frac{y}{4}-\frac{z}{2}) O_{2}=xCO_{2}+\frac{y}{2H_{2}O}[/tex]
On putting the estimated values, we get
⇒ [tex]12\times x=1\times y+16\times z=0.4647[/tex]
⇒ [tex]12\times 0.01962+1\times 0.03922+16\times z=0.4647[/tex]
⇒ [tex]0.27466+16z=0.4647[/tex]
⇒ [tex]z=0.01187[/tex]
Now,
x : y : z = [tex]0.01962:0.03922:0.01187[/tex]
= [tex]\frac{0.01962}{0.0118}:\frac{0.03922}{0.0188}:\frac{0.0188}{0.0188}[/tex]
= [tex]1.6:3.3:1.0[/tex]
= [tex]3:6:2[/tex]
So that the empirical formula seems to be "C₃H₆O₂".
in what type of molecule are london dispersion forces most important?
Answer:
Read below
Explanation:
The effects of London dispersion forces are most obvious in systems that are very non-polar (e.g., that lack ionic bonds), such as hydrocarbons and highly symmetric molecules such as bromine (Br2, a liquid at room temperature), iodine (I2, a solid at room temperature).
many cars are fitted with airbags which inflate in an accident. Airbags contain solid sodium azide, NaN₃, which decomposes rapidly to form sodium and nitrogen. The nitrogen formed fills the air bags. Can someone please solve part b and c. I'll mark brainliest to whoever gets it right!
little help plz? Determine which of the following is the correct equilibrium expression for the chemical reaction: Answer choices are below.
Answer:
Kc = [CaO] [O2] / [CaCO3]
Explanation:
Equilibrium constant, Kc is simply defined as the ratio of the concentration of products raised to their coefficient to the concentration of the reactants raised to their coefficient.
Thus, we can write the equation for the equilibrium constant, Kc for the reaction given in the question above as follow:
CaCO3(s) <==> CaO(s) + O2(g)
Kc = [CaO] [O2] / [CaCO3]
What makes metals, in particular, good conductors of electricity?
Answer:
In metals, the outer electrons of the atoms belong to a 'cloud' of delocalised electrons. They are no longer firmly held by a specific atom, but instead they can move freely through the lattice of positive metal ions, these factors makes them a good conductor of electricity .
Which of the following has the highest electromagnivity
Answer:
Where are the answer choices
?