To determine the substance that comprises the anode and the cathode in a galvanic cell is by determing ;
The material with the larger (more positive) standard reduction potential that will be the cathode.
Characteristics of a galvanic cellIn a galvanic cell, oxidation which leads to the loss of elctrons occurs at the anode, while reduction ( addition of elctrons ) occurs at the cathode. therefore the materials with a more positive standard reduction potential will be the cathode of the galvanic cell.
Hence we can conclude that The material with the larger (more positive) standard reduction potential will be the cathode.
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PLEASE HELP MEE !!!!!
1. Which organism is the main source of energy for the food web (producer)?
2. Which is a food chain you can get from this food web?
3. Which organism is a primary consumer?
4. Which organism would be considered a secondary consumer?
5. Which organism is a top predator?
6. Which organism is a decomposer?
7. Can energy recycle back into the food web?
PLEASE AND THANKYOU <33
Answer:
Hope it helps
Explanation:
1. Phytoplankton is the main source of energy.
2. Algae--> Limpet--> Starfish --> Shark (I am not sure about this answer )
3. Limpets (not sure, sorry) I think there are more than one in this, like Mussel, zooplankton...
4. Starfish
5. Shark
6. Bacteria
7. No, energy cant be recycled back into the food web.
I tried my best to answer. Hope it will help you.
difference between atom and molecule
Answer:
Atoms are single neutral particles. Molecules are neutral particles made of two or more atoms bonded together. An ion is a positively or negatively charged particle.
Answer:
atoms constitute molecules; molecules are formed by the union of 2 or more atoms
Explanation:
Which gas law relates pressure and volume?
- Is there a direct or indirect relationship?
- What variable is held constant?
Gas laws are the relation between pressure, volume, and temperature of the gas. The relation between the pressure and the volume of the gas is given by Boyle's law.
What is Boyle's law?Boyle's law gives the relation between the pressure and the volume of the gas and states that the pressure is in the inverse relationship with the volume of the gas.
When the pressure of the gas is increased the volume of the gas decreases, similarly the decreased pressure of gas results in an increased volume of gas.
Boyle's law is given as,
[tex]\rm V = \rm constant (\dfrac{1}{P})[/tex]
and,
[tex]\rm P_{1}V_{1} = \rm P_{2}V_{2}[/tex]
Boyle's law is only true if the moles of the gas (n) and the temperature (T) of the gaseous system are constant.
Therefore, pressure and volume are in indirect relation and the moles and the temperature are constant in Boyle's law.
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Calculate the number of moles and the number of grams of the following solution 1. 0L of 0. 50M NaCI
How many electrons are lost or gained in forming each ion? a. Ba2+ b. As3- c. Cu2+
Answer:
See below
Explanation:
Part a)
Ba⁺²
Since it has a positive charge, this means it has lost electrons and that too 2 electrons. It has lost 2 electrons.
Part b)
As⁻³
Since it has a negative charge, it has gained electrons and that too 3 electrons. It has gained 3 electrons.
Part c)
Cu⁺²
It has a positive charge, so it has lost electrons and that too 2 electrons. It has lost 2 electrons.
[tex]\rule[225]{225}{2}[/tex]
How many grams of NH4Cl will dissolve in 50 grams of 90°C water?
In 50 grams of water at 90°C, it is expected 35 grams will dissolve considering the solublity is 70g/ 100 grams of water.
How are solubility and temperature related?Solubility increases when temperature increases, which means more grams of a substance can be disolved if temperature is higher.
How to determine solubility?The best is through a solubility curve chart as the one below.
What is the solubility in this case?As observe in the graph the solubility at 90°C using 100 grams of water is 70g/ 100 grams of water; this implies in 50 grams the solubility is 30 grams.
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How are acids described according to the bronsted-lowry definition?.
Answer:
an acid is a proton (H⁺) donor
Explanation:
hope this helps
pls nmark brainliest
The mass spectrum of an organic compound shows the relative abundances of M to be 34.76% and M 1 to be 2.632%. Assuming the peaks are caused by C12 and C13 isotopes, determine the number of carbon atoms in the compound. The natural abundance of C12 is 98.93%, and the natural abundance of C13 is 1.07%.
The number of carbon atoms present in any compound is equal to seven.
How do we calculate the number of carbon atoms?Number of carbon atoms present in any compound will be calculated by using the following equation:
No. of Carbon atoms = Relative intensity of M+1 peak / Natural abundance of C13
Intensity of molecular peak = 34.76%
Intensity of M+1 peak = 2.632%
Relative intensity of M+1 peak = (100/34.76)×2.632 = 7.57%
Given that natural abundance of M+1 = 1.07%
On putting values on above equation, we get
No. of C atoms = 7.57 / 1.07 = 7.07 = 7 (approx)
Hence number of carbon atoms is 7.
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Captures sunlight to make food for the cell through photosynthesis.
Answer:
Chloroplasts
Explanation:
Chloroplasts purpose are to take the energy from the Sun's light and turn it into food for the plant.
When 5.0g of a nonelectrolyte is added to 25g of water, the new freezing point is -2.5 degrees C What is the molality of the solution? What is the molar mass of the unknown compound
The molality of the solution and the molar mass of the unknown compound is mathematically given as
M=1.34149.25g/molWhat is the molality of the solution, and the molar mass of the unknown compound?Generally, the equation for the Molarity is mathematically given as
M=dt/Kt
Therefore
M=2.5/1.86
M=1.34
Therefore
M=wt s/Mol of un*1000/gof solvent
mol of un =5*1000/1.34*25
149.25g/mol
In conclusion, the molar mass of the unknown compound is
149.25g/mol
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Calcium hydroxide: Group of answer choices cannot be placed under direct composite resins because it will inhibit polymerization. stimulates the production of reparative dentin. functions as a thick base to support extensive restorations. consists of a resin in an organic solvent.
Answer:
B. Stimulates the production of the reparative dentin.
Explanation:
If a radioactive material has a half-life of 10 years, what fraction of the material will remain after 40 years?
Answer:
1/ 16 th left
Explanation:
40 years is FOUR half lives 1/2 * 1/2 * 1/2 * 1/2 = 1/16 th will left
A student looking for an element that will bond with sodium (Na) knows that table salt is a compound of sodium and chlorine (Cl). Based on this information, which of the following elements would most likely bond with sodium?
Based on the information on the student looking for an element that will bond with sodium, the element that will likely bond with sodium is bromine.
How do elements bond?Elements bond with one another in a chemical manner to form compounds, which cannot be broken down into their constituent elements without being destroyed.
According to this question, a student is looking for an element that will bond with sodium (Na) with the knowledge that table salt is a compound of sodium and chlorine (Cl).
This suggests that an element that will likely bond with sodium must be in the same group with chlorine because they will possess the same chemical properties.
Therefore, based on this information, the element that will likely bond with sodium is bromine.
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How hot or cold the air is.
Is chocolate chip ice cream homogeneous or heterogeneous?.
Answer:
Chocolate chip ice cream is a heterogeneous mixture.
Explanation:
The chocolate is not uniformly mixed with the dough. These all indicate that a chocolate chip cookie is a heterogeneous mixture.
hope this answer helped :)
The mixtures are formed when two or more elements or compounds are mixed without participating in a chemical change. It is not necessary that the substance should mix in a definite ratio to form a mixture. Here chocolate chip ice cream is a heterogeneous mixture.
What is heterogeneous mixture?These are the types of mixtures in which the components are not mixed uniformly and possess a non-uniform composition throughout is defined as the heterogeneous mixture. The components of heterogeneous mixtures can be seen through eyes.
The constituent particles of heterogeneous mixture have different physical properties. The components of this mixture can be separated easily. Here the size of particles are found to be large. Examples are mixture of salt and sugar.
Here the chocolate chip ice cream is a heterogeneous mixture. This a mixture of liquid and finely dispersed solids. So it is a heterogeneous mixture.
Thus chocolate chip ice cream is heterogeneous.
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What percentage of the atmosphere is carbon dioxide?.
Answer:
4%
Explanation:
the answer is 4% , hope this help
Hello people ~
When acetamide is converted to methylamine, what is the name of the reaction?
a) Friedel-Craft’s reaction
b) Hofmann reaction
c) Hofmann bromamide reaction
d) Hinsberg reaction
Answer:
Hofamann Bromamide reaction
Explanation:
In Hofmann Bromamide reaction and tertiary or secondary amide is treated with liquid bromine in an aqueous solution of sodium hydroxide, It turns the amide to form primary amideOption C
Answer:
c) Hofmann Bromamide reaction
Explanation:
The reaction in which Acetamide is converted to Methylamine is known as Hofmann Bromamide reaction. Thus, option (c) is the correct answer.
Ughhh ughh ughhhh
helppp
Answer:
Explanation:
one is True, an electro magnet is only magnetic because of current producing the magnetic field.
A sample of carbon monoxide and oxygen gasses are
allowed to combust in a small flask. They reaction is
described by the following equation.
2CO (g) + O₂ (g) → 2CO2 (g)
After the reaction is complete, the pressure of CO₂ is 0.868
atm and the temperature is 35.0 °C in a 500.0 mL flask. How
many moles of CO2 were produced assuming that the
reaction went to completion?
Answer:
.0172 mole of CO2
Explanation:
PV = nR T n = number of moles V = .5 liter
R = gas constant = .082057 L atm/(k mole)
T needs to be in Kelvin = C + 273.15
.868 * .5 = n * .082057 * ( 35 + 273.15)
n = .0172 moles
Can an intermediate appear as a reactant in the first step of a reaction mechanism?.
Answer:
No
Explanation:
An intermetiate in a chemical reaction is something that is formed and reused in a reaction.
2As + 6NaOH 2 Na3ASO3 + 3 H2
If you start the above reaction with 3.25 moles of NaOH, how many moles of Na AsOs will
be produced?
Answer: 1.08 moles
Explanation:
For every 6 moles of sodium hydroxide consumed, 2 moles of sodium arsenite are produced.
This means that if 3.25 moles of sodium hydroxide are produced, we can set up the proportion:
3.25/6 = x/2, where x is the number of moles of sodium arsenite produced.
It follows that x = 1.08 moles.
Chlorine reacts with hydrogen to form hydrogen chloride. As chlorine is more electronegative, it attracts shared paired of electrons towards itself. What type of compound is HCL?
Answer:
hcl is a covalent compound
Explanation:
Why is it possible for an oxygen atom to form a double covalent bond, but its not possible for a chlorine atom to form a double covalent bond?
A chemist wants to prepare a stock solution of H2SO4 so the samples of 20ml will produce a solution with concentration of 0.5M when added to 100ml of water. What should the molarity if the stock solution be?
Answer:
If you want the first option you need 2.5M.
If you want the second, you will end up with 120ml so your starting solution is:
0.5x (120/20) = 3.0M
This assumes that there’s no loss of volume on mixing. To remove that uncertainty, start with the 20ml of acid and add water, mixing, till you get the right volume.
What is one thing that could have prevented the Chernobyl tragedy?
Answer: if the staff at Chernobyl had been better trained.
The Chernobyl series seems to suggest there were a number of ways the explosion could have been prevented. These include if the staff at Chernobyl had been better trained, if the Soviet government had learned from the lessons of the past and if they had not been so averse to spending money.
nepheline a nonpartisan that survives at room temperature can be used to protect wool clothing from being eaten by moths.
a) Explain in terms of intermolecular forces why Nephilim sublimes
b) Explain why Nathaline is not expected to dissolve in water
c) The empirical formula of naphthalene is C5H4 and the molecular mass of Nephilim is 128 g flash mole What is the molecular formula for Naphthalene
#1
Nephilim has very weak intermolecular forcesSo on heating it directly turns gas from solid.#2
Nathaline is non polar Water is polarSo it is not expected to dissolve in water.
#3
Empirical formula mass
5(12)+4=60+4=64gn:-
Molecular formula mass/Empirical formula mass128/642Molecular formula
n×Empirical formula2(C_5H_4)C_10H_81.50 atmospheres to kPa
Answer:
151.988 how i don't know
can I get some help please
Answer: hi! I think it would be A: Carbohydrates, fats, and proteins, but I’m not 100% sure!! If not I’m so sorry!
Explanation: btw I have a question (if you would have time to pls helps me tyy!!)
Based on the equations below, which reaction will form a precipitate?
KI (aq) + LiNO₃ (aq) →
NaOH (aq) + NH₄C₂H₃3O₂(aq) →
Ca(NO₃)₂(aq) + K₂CO₃(aq) →
Cu(NO₃)₂ (aq) + BaCl₂(a
The equation C will form a precipitate in the form of calcium carbonate.
What is a Precipitate?
This is the formation of an insoluble compound during a chemical reaction.
Ca(NO₃)₂(aq) + K₂CO₃(aq) → CaCO₃(s) + 2KNO₃(l)
The precipitate formed in this chemical reaction is CaCO₃ which is insoluble in water thereby making it the most appropriate choice.
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Most individuals have been vaccinated for measles. Those who have not been vaccinated are typically protected by
herd immunity.
genetic variation.
artificial passive immunity.
natural active immunity.
Answer:
artificial passive immunity