Answer:
slowing the rate of enzyme action
Explanation:
The prevention of fruits browning is the result of :
>slowing the rate of enzyme reaction
How is the browning of fruits prevented?The browning of fruits can be slowed down by preventing the enzyme from working properly. Lemon juice contains an acid which can stop enzymes from working properly. For example, water and sugar in jam prevents oxygen in the air to reach enzymes and hence protects from browning.
Always keep cut fruits such as apples, pears and peaches from turning brown by coating them with an acidic juice such as lemon or orange.
The enzyme that is responsible for the browning is called polyphenol oxidase. PPO enzyme in the presence of oxygen changes substances known as phenolic compounds, through oxidation, into quinones.
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On the periodic table, gold has the atomic number 79. This means that
Answer:
it has 79 protons
Explanation:
the atomic number is equal to the number of protons an element has.
On the periodic table, gold has the atomic number 79. This means that the gold has a total of 79 protons present inside its nucleus, as the number of protons signifies the atomic number.
What is the atomic number?The total number of protons present in an atom is known as the atomic number of that atom.
The atomic number has no correlation either with the number of neutrons or the number of electrons present inside an atom
The current periodic table divides elements into groups according to their increasing atomic numbers.
The atomic number of gold is 79 on the periodic table. This indicates that the gold's nucleus has 79 protons in total, where the number of protons represents the atomic number.
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someone help me with chemistry on my account/page please :))
Answer:
ok
Explanation:
M=DxV is a formula for finding*
Answer:
Density
Explanation:
Density of a substance is the mass per unit volume of the substance.
Mass is the amount of particles contained in a matter
Volume is the space occupied by the substance;
To find density, we simply use;
Density = [tex]\frac{mass}{volume}[/tex]
So;
Mass = Density x Volume
From;
M = D x V
M is the mass
D is the is the density
V is the volume
What are [H3O+], [OH?], and pH in a solution with a pOH of 11.17? Make sure your answers are given to the correct number of significant figures.
[H3O+] = __ x 10 __ M
[OH?] = __ x 10 __ M
pH= __
Answer:
[OH⁻]= 6.76*10⁻¹² M
pH= 2.83
[H₃O⁺]= 1.48*10⁻³
Explanation:
The pOH (or potential OH) is a measure of the basicity or alkalinity of a solution that indicates the concentration of hydroxyl ions [OH-] present in a solution. The pOH is defined as the logarithm of the concentration of OH- ions, with the sign changed:
pOH= -log[OH⁻]
In this case, pOH= 11.17. So:
11.17= -log [OH⁻]
Solving:
-11.17=log [OH⁻]
10⁻¹¹ ¹⁷= [OH⁻]
6.76*10⁻¹² M= [OH⁻]
pH, short for hydrogen potential, is a parameter that indicates the concentration of hydrogen ions [H⁺] or [H₃O⁺] that exist in a solution and is calculated as the logarithm of the concentration of H⁺ ions, with the sign changed:
pH= -log[H⁺]= -log[H₃O⁺]
The relationship between pH and pOH can be established by the expression:
pH + pOH= 14
In this case, being pOH=11.17:
pH + 11.17= 14
and solving you get:
pH= 14 - 11.17
pH= 2.83
Finally, replacing this value in the definition of pH:
2.83= -log [H₃O⁺]
and solving you get:
-2.83= log [H₃O⁺]
10⁻² ⁸³= [H₃O⁺]
1.48*10⁻³= [H₃O⁺]
An unknown element is determined to have 22 neutrons and a mass number of 40.
What element is this?
Write the net ionic equation for the reaction of aqueous copper(II) chloride with aqueous sodium phosphate. Remember to include the states of matter.
Answer:
3 Cu²⁺(aq) + 2 PO₄³⁻(aq) ⇒ Cu₃(PO₄)₂(s)
Explanation:
Let's consider the molecular equation between aqueous copper(II) chloride and aqueous sodium phosphate.
3 CuCl₂(aq) + 2 Na₃PO₄(aq) ⇒ 6 NaCl(aq) + Cu₃(PO₄)₂(s)
The complete ionic equation includes all the ions and insoluble species.
3 Cu²⁺(aq) + 6 Cl⁻(aq) + 6 Na⁺(aq) + 2 PO₄³⁻(aq) ⇒ 6 Na⁺(aq) + 6 Cl⁻(aq) + Cu₃(PO₄)₂(s)
The net ionic equation includes only the ions that participate in the reaction (not spectator ions) and insoluble species.
3 Cu²⁺(aq) + 2 PO₄³⁻(aq) ⇒ Cu₃(PO₄)₂(s)
A sumo wrestler is 330 pounds. How much force does the earth exert on him? (Weight)
Answer:
1336.4N
Explanation:
Given parameters:
Mass of the sumo wrestler = 330pounds
Unknown:
Amount of force the earth exerts on the wrestler = ?
Solution:
The force the earth exerts on the wrestler is the weight of the man;
Weight = mg
where;
m is the mass
g is the acceleration due to gravity
Now,
let us convert from pounds to kg;
2.2pounds = 1kg
300 pounds = [tex]\frac{300}{2.2}[/tex] = 136.4kg
Weight = 136.4kg x 9.8m/s² = 1336.4N
Which of the following is NOT a part of Dalton's atomic theory
Answer:
u didn't give us the multiple hoice answer
Explanation:
Answer:
Here are the answer choices
Explanation:
A) Compounds contain atoms of at least two different elements.
B) Each element is made up of atoms.
C) Each element contains atoms with negatively charged particles.
D) Atoms within the same element have the same amount of mass.
Is this a balanced equation?
Answer: NO
Explanation:
Answer:
yes
Explanation:
How are sunspots correlated with the sun's activity?
Answer:
If sunspots are active, more solar flares will result creating an increase in geomagnetic storm activity for Earth.
Explanation:
I ask mom
NEED HELP!!! Thank u!!!!
Answer:
D
Explanation:
the correct answer is d
Answer:
d
Explanation:
Its just seem like NaCl structure
What is the mass, in grams, of one mole of any substance known as? (please help!)
A.
atomic mass
B.
molar mass
C.
molecular weight
D.
atomic number
What is the difference between the systematic and common name for monatomic ions?
Answer:
The correct answer is B)The systematic name is the metal name followed by the charge on the metal atom. It is written as a Roman numeral and is in parentheses.
The common name is formed from the Latin root followed by -ous for low charge form, -ic for high charge form
Multiple Choice
Which of the following is a good study habit?
A. maintaining a positive attitude
B. waiting until the last minute to start on an assignment
C. listening to the television while studying
D. studying when you are tired
Answer:
A.- maintaining a positive attitude
Explanation:
The answer is very obvious you need to maintain a positive attitude while studying.
Answer:
A: maintaining a positive attitude
Explanation:
I myself have personal experience with all of these, and B,C,D just don´t seem like reasonable answers. If you wait until the last minute to start an assignment, chances are you won´t get it done. Listening to the television while studing is a pretty bad idea because you might get distracted. Never study when tired because if you´re tired the information might not stick in your head. The only answer left is A.
HELP!!!
OPTIONS:
gas,
liquid,
solid
Answer:
Melting: solid liquid, Freezing: liquid to solid, Evaporation: liquid to gas.
Explanation:
mark me the brainliest
How much heat is required to heat 1.6g of ice from -16c to steam at 112c?
Answer:
Total heat ≅ 49.07 kJ
Explanation:
Given that:
mass = 1.6 g = 0.016 kg
Initial temperature = - 16 ° C
final temperature = 112° C
specific heat for ice = 2.06 kJ/kgC
specific heat of water = 4.186 kJ/kgC
heat fusion of ice = 334 kJ/kg
specific heat for steam = 2.1 kJ/kgK
heat of vaporization of water = 2256 kJ/kg
To heat ice from -16 ° C to 0 ° C
Q₁ = 2.06 kJ/kgC × 0.016 kg × 16 ° C
Q₁ = 0.52736 kJ
To melt Ice at 0° C
Q₂= 334 kJ/kg × 0.016 kg = 5.344 kJ
To heat water from 0° C to 100° C
Q₃ = 4.186 kJ/kgC × 0.016 kg × 100° C
Q₃ = 6.6976 kJ
To vaporize water to steam at 100° C
Q₄ = 2256 kJ/kg × 0.016 kg = 36.096 kJ
To heat steam from 100C to 112° C
Q₅ = 2.1 kJ/kgC × 0.016 kg × 12 C
Q₅ = 0.4032 kJ
Total heat = Q₁ + Q₂ + Q₃ + Q₄ + Q₅
Total heat = (0.52736 + 5.344 + 6.6976 + 36.096 + 0.4032) kJ
Total heat = 49.06816 kJ
Total heat ≅ 49.07 kJ
Sal drew the electron dot diagram as shown.
How should Sal correct diagram?
Answer:
Answer: He should add a single dot below the symbol to correct the electron dot diagram of an aluminium atom.
Explanation: Electron dot structures are the structures in which valence electrons around an atom are shown. The electrons are represented as dots in these structures.
Aluminium is the 13th element of the periodic table.
Electronic configuration of Aluminium is given by:
Valence electrons of aluminium = 3
In the given image, 2 valence electrons are shown and total number of valence electrons are 3. So, in order to correct the diagram, he should add a single electron below the symbol.
Explanation:
yes giuve me brainliest
3
Select the correct answer.
Which form of light can a human eye see?
O A infrared light
OB.
near-infrared light
-
O c. ultraviolet light
OD
visible light
Answer:
human can see visible light
Answer:
i beleive it is D. visible light
Explanation:
if im wrong sorry this subject isnt my forte
A students drawing of a nitrogen atom is shown. What change would make the model more accurate?
A-move the electrons into the nucleus
B-add 2 more protons
C-show 7 neutrons in the nucleus
D-remove 2 electrons
(Please leave a small explanation)
Answer:
C - show 7 neutrons in the nucleus
Explanation:
Use process of elimination:
-Answer A will not work because electrons are not in the nucleus.
-Answer B will change the atom's identity from nitrogen to fluorine; it will not work.
-Answer D will create a nitrogen ion, which is not what the prompt is asking for (an atom); it will not work.
The only logical answer is C, as that is the only one that is also true.
What evidence was used in the investigation of the Gaetane Bouchard's murder? Was it considered class evidence or individual evidence?
Answer:
class i believe
Explanation:
Help fast I really need it bad
Answer:
Pain
Explanation:
the pain depends on u banging your head
Which of the following bases is the STRONGEST? The base is followed by its Kb.A. C6H5NH2, 4.0 × 10-10 B. NH3, 1.76 × 10-5 C. CH3NH2, 4.4 × 10-4 D. (CH3CH2)2NH, 8.6 × 10-4 E. C5H5N, 1.7 × 10-9
Answer:
(D) (CH3CH2)2NH
Explanation:
In order to decide which base is strongest we need to calculate its PKb
PKb = -log [Kb]
A large Kb value and small PKb value gives the strongest base
Compound Kb PKb
(A) C6H5NH2 - 4 x 10^-10 9.349
(B) NH3 1.76x 10^-5 4.754
(C) CH3NH2 4.4x 10^-4 3.357
(D) (CH3CH2)2NH 8.6x 10^-4 3.066
(E) C5H5N 1.7x10^-9 8.77
Clearly (CH3CH2)2NH is the strongest base.
. A pipet is a type of glassware that is used to deliver a specified volume of liquid. A 5 mL pipet has major scale divisions marked for every milliliter and minor scale divisions marked for every 0.1 mL. What is the uncertainty (in mL) made using this pipet? Would it be proper to report that the pipet was used to deliver 3.2 mL of liquid? Explain why or why not
Answer:
Measure of uncertainty thousands place or .01 mL
Yes it would be proper.
Explanation:
measure of uncertainty is when you as the user have to guess, since the pipette has marks every 0.1 ml then you can guess that the liquid is in between the marks or maybe closer to one mark then the other.
Which of these is given away or accepted by an atom when it reacts with other atoms?
Electron
Neutron
Nucleus
Proton
A; Electron is your answer.
Answer:
Electron
Explanation:
An atom can either gain, share, transfer, and/or lose electron(s)
What information do the reduction potentials of two elements give about a
redox reaction between those elements?
A. Which element will be oxidized and which will be reduced
B. The electronegativity difference between the two elements
C. Whether electrons will be gained or lost by the oxidized atom
D. Which element is more commonly found in nature
The information that the reduction potentials of two elements give about a redox reaction between those elements is which element will be oxidized and which will be reduced. The correct option is A.
What is a redox reaction?Redox reactions include a change in the oxidation state of the substrate. Loss of electrons or a rise in an element's oxidation state is considered to be oxidation.
Gaining electrons or lowering an object's or its atoms' oxidation state are both considered reductions. A chemical reaction known as an oxidation-reduction (redox) reaction includes the exchange of electrons between two substances.
The reduction potential tells about the element that will be oxidized ad which will be reduced in the redox reaction.
Thus, the correct option is A. Which element will be oxidized and which will be reduced.
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Answer:
Option (A)
Which element will be oxidized and which will be reduced
Explanation:
Hopes this helps.
Jasmine is doing an experiment to see how much temperature change occurs when three different substances are heated. Between the three conditions, she must control (keep the same) all of the following EXCEPT:
Answer:
SUBSTANCES
Explanation:
According to this question, Jasmine is conducting an experiment in order to see how much temperature change occurs when three different substances are heated. Based on this experiment, the INDEPENDENT VARIABLE, which is the variable that is changed or manipulated is SUBSTANCES.
A controlled experiment is an experiment where all other variables except the INDEPENDENT VARIABLE is kept the same or unchanged. The independent variable is the only variable allowed to change, which in this case is the SUBSTANCES USED.
Why are tables and graphs useful for organizing scientific data?
Answer:
Since most of the data scientist collect is quantitative, data tables and charts are usually used to organize the information • Graphs are created from data tables • They can allow the investigator to get a visual image of the observations, which simplifies interpretation and drawing conclusions • Valid conclusions depend
Can a closed system have a physical change or chemical change or both
answer is both physical and chemical changes
PLEASE HELP QUICKLY!! Which statement best describes all minerals?
In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure, that occurs naturally in pure form.
hope this helps
Which 20.0 g sample of metal is most likely to undergo the smallest change in temperature upon absorption of 100.0 J of heat?
Substance Specific Heat Capacity (J/g*K) Elements aluminum, 0.900 AI graphite, 0.711 iron, Fe 0.450copper, Cu 0.387 gold, Au 0.129a. copper
b. aluminum
c. graphite
d. iron
e. gold
Answer:
b. aluminum
Explanation:
The specific heat capacity is defined as the amount of heat required to raise the temperature of 1g of a material in 1°C.
Thus, the sample with the higher specific heat capacity is the sample that will require more energy to increase its temperature in 1°C, suffering the smallest change in temperature.
Thus, is the aluminium with 0.900J/gK the element that is most likely to undergo the smallest change in temperature:
b. aluminum