Answer:
0.025 L
Explanation:
The production of oxygen in the electrolysis of water is;
4OH^-(aq) -----> 2H2O(l) + O2(g) + 4e
Since 1 F = 96500C
molar volume of a gas = 22.4 L
From the reaction equation;
4 * 96500 C yields 22.4 L of oxygen
(3 * 60 * 60 * 0.0400) C yields (3 * 60 * 60 * 0.0400) * 22.4/4 * 96500
= 9676.8/386000
= 0.025 L
The data below compares two different cells, Cell A and Cell B.
Cell A
Cell B
1. Has a cell membrane
2. Is oval-shaped
3. Has a nucleus
1. Has a cell membrane
2. Is spindle-shaped
3. Has a nucleus
What can you conclude about both cells from the comparison?
a
Cell A is a prokaryotic and Cell B is a eukaryotic cell.
Both are eukaryotic cells.
Both are prokaryotic cells.
Cell A is a eukaryotic and Cell B is a prokaryotic cell.
Answer:
both are eukaryotic
Explanation:
both has nucleus so
How does the vapor pressure of mercury affect the pressure reading of the manometer?
Copper(II) oxide reacts with carbon when heated.
2Cu + C → 2Cu + CO2
Which statement about this reaction is correct?
ACarbon is the oxidising agent.
B Carbon is the reducing agent.
C Copper(II) oxide is oxidised.
D Copper(II) oxide is the reducing agent.
Answer:
the fourth one or the first, but I wouldn't say I'm completely sure.
Explanation:
Answer:
B Carbon is the reducing agent
Explanation:
carbon is above copper in the reactivity series hence reducing copper (II) oxide to copper
1. A certain first-order reaction has a half-life of 75 minutes.
A. Find the rate constant, including the correct units.
B. How long would it take for the reaction to reach 62% completion?
2.Using the same half-life and %-completion values from #2, find the rate constant (with the correct units) and the time needed to reach 62% completion if the reaction was second-order and had a half-life of 75 minutes.
3. A certain reaction has the following form:
aA -> bB
Answer:
don't click on the link above me it's a scam bot
What is the percent composition of oxygen in BaCrO4
Answer: The percent is 25.263%
Explanation:
What variables SPEED UP weathering? pick all that apply!
1. Tropical Climate (warm and wet)
2. Cold and Dry Climate
3. Sedimentary Rock such as limestone and sandstone
4. Igneous Rock such as Granite
Answer:
the answer is 1,2
Explanation:
thank you
A gas occupies 2.50 L at 1.5 atm. What will be the volume of this gas if the
pressure becomes 1.25 atm?
Answer:
2.08 L
Explanation:
[tex]V_{2} = V_{1}[/tex] [tex](\frac{P_{2} }{P_{1} })[/tex]
= 2.50L × [tex](\frac{1.25 atm}{1.5 atm} )[/tex]
=2.08L
what is potential energy? (person with the right answer will get 5 stars)
Answer:
The energy possessed by a body by the virtue of its position is called potential energy.
what are the properties of a thermal insulator
Answer:
They have lower thermal conductivity They often have high air permeability They are non combustible They are light in weight They are stable chemically and physically at high tempHow does the kinetic theory of gases explain the weather changes happening in the troposphere? You can also research on the internet using keywords such as troposphere, atmosphere layers, and weather changes.
Answer: According to Kinetic Molecular Theory, an increase in temperature will increase the average kinetic energy of the molecules. As the particles move faster, they will likely hit the edge of the container more often.
Answer:According to Kinetic Molecular Theory, an increase in temperature will increase the average kinetic energy of the molecules. As the particles move faster, they will likely hit the edge of the container more often.
Explanation:
Science help me now
Answer:
but were is the answer
Explanation:
i am so confuesed
What is the oxidation state of N in NH4?
A. -3
B. +5
C. +1
D. -5
Pedro adds 3.23 moles of helium to a balloon that already contained 4.51 moles of helium creating a balloon with a volume of 9.87 liters. What was the volume of the balloon before the addition of the extra gas?
Answer:
7.The answer is 2.13 because if u add 3.23 and 4.51 and the answer is 7.74 and u add 2.13 to get 9.87. 3.23 + 4.51 + 2.13 is 9.87
Explanation:
What is the concentration of each ion in a 0.525 mol/L solution of magnesium chloride?
mg=? cl=?
Answer:
Mg⁺² = 0.525 mol/L
Cl⁻ = 1.05 mol/L
Explanation:
The formula for magnesium chloride is MgCl₂, and in a solution the following process takes place:
MgCl₂ → Mg⁺² + 2Cl⁻By analyzing the stoichiometric coefficients, we can tell that the concentration of Mg⁺² ions is the same as the concentration of MgCl₂, while the Cl⁻ concentration is twice that value.
In other words:
Mg⁺² concentration = MgCl₂ concentration = 0.525 mol/LCl⁻concentration = 2 * MgCl₂ concentration = 1.05 mol/L3. Density is influenced by changes in
A.Temperature and salinity
B.Wind
C.Upwelling
D.Ocean currents
Answer:
C upwelling
Explanation:
Because when temperature is influenced it could either be increased or decreased
1
An atom with 17 protons, 17 electrons and 18 neutrons has a mass number
of
Answer:
35
Explanation:
mass number = protons in the nucleus + neutrons in the nucleus
17 + 18 = 35, the mass number
Protons and neutrons are together known as nucleons.
I would appreciate Brainliest, but no worries.
How many joules are required to heat 15 grams of ice from -200⁰ to 1400⁰ C?
Answer: A heat energy of 50160 joules are required to heat 15 grams of ice from [tex]-200^{o}C[/tex] to [tex]1400^{o}C[/tex].
Explanation:
Given : mass of ice = 15 g
Convert grams into kg as follows,
[tex]1 g = 0.001 kg\\15 g = 15 g \times \frac{0.001 kg}{1 g}\\= 0.015 kg[/tex]
Initial temperature = [tex]-200^{o}C[/tex]
Final temperature = [tex]1400^{o}C[/tex]
Formula used to calculate the amount of heat energy is as follows.
[tex]q = m \times C \times (T_{2} - T_{1})[/tex]
where,
q = heat energy
m = mass of substance
C = specific heat of substance (ice here has C = [tex]2090 J/kg ^{o}C[/tex])
[tex]T_{1}[/tex] = initial temperature
[tex]T_{2}[/tex] = final temperature
Substitute the values into above formula as follows.
[tex]q = m \times C \times (T_{2} - T_{1})\\= 0.015 kg \times 2090 J/kg^{o}C \times [1400 - (-200)]^{o}C\\= 50160 J[/tex]
Thus, we can conclude that 50160 joules are required to heat 15 grams of ice from [tex]-200^{o}C[/tex] to [tex]1400^{o}C[/tex].
A scuba diver is using scuba gear to breathe under water. The pressure on her lungs is 2.5 atm and her lung volume is 4.4 L. What will happen to the volume of her lungs when the pressure increases to 4.5 atm?
Answer:
2.44 LExplanation:
The volume can be used by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2 \\ [/tex]
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
Since we're finding the final volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
We have
[tex]V_2 = \frac{2.5 \times 4.4}{4.5} = \frac{11}{4.5} \\ = 2.444444....[/tex]
We have the final answer as
2.44 LHope this helps you
help please!!! no links
Shoals are raised landforms made of sand and gravel that are commonly found in Florida. They are often called sandbars and are located in and around bodies of water such as oceans, rivers, and lakes. Which factor most commonly causes shoals to form or change shape?
Heavy rain fall most commonly causes shoals to form or change shape making depressions and bars in the sand.
What causes a shoal ?Wave shoaling occurs when surface waves slow down, their wave height rises, and the space between waves narrows as they approach shallow water, like a beach. The waves are said to shoal because of this action, which is known as shoaling.
The shoal, a buildup of silt that might be hazardous to ships in a river channel or on a continental shelf.
Conventionally, it is assumed that the continental shelf is less than 10 metres below sea level at low tide. Shoals are created mostly by the same processes that result in offshore bars.
Thus, Heavy rain fall causes shoals to produce and change shape creating depressions and bars in the sand.
To learn more about the shoal, follow the link;
https://brainly.com/question/4350298
#SPJ6
Explain how natural resources are identified and why natural resources are unevenly distributed.
Please help me I will write this in my own words and you will be given 20 points ad brainlist also please don't put a super long answer just a small simple paragraph and don't give me a link..
Answer:
Natural resources are naturally formed of course(wood copper fruits) and they are not distributed evenly due to competition of getting them and the prices of the resources
Explanation:
At which temperature could air hold the most water vaper?
Answer: 80 degrees F
Explanation:
Who was one of the first scientists to realize the effects of CO2 in the atmosphere? where was it measured?
I give Brainliest! Please no links
why should a sports person or a rickshaw puller in take more corbohydrate rich food in their diet
Answer:
Because carbohydrates are energy
Explanation:
Carbohydrates is best best nutrient for energy, turning into energy as soon as they are eaten. A rickshaw puller most likely needs quite a bit of energy to pedal all day without getting tired, so that's why they eat a carbohydrate rich diet.
the formula equation of Calcium carbonate ----> Calcium oxide + carbon dioxide
Answer:
CaCo3---> CaO +CaO2
Explanation:
process of fracking
Please help me on the following questions;
How many moles are found in 2.06 x 10^23 molecules of carbon monoxide?
How many moles are found in 8.70 x 10^25 atoms of Zinc?
How many moles are found in 1.44 x 10^22 formula units of salt?
How many moles are found in 3.00 x 10^23 atoms of krypton?
Answer:
0.342 moles
145 moles
0.0239 moles
0.498 moles
Explanation:
To solve this you only need to follow this rule:
N = n x Na. For solving this questions, you just need to divide this values for Avogadro's Coasting, and it's done. Hope it helped!
For the balanced equation shown below, what would be the limiting reagent if 80.2 grams of N2 were reacted
with 399grams of H2O?
N2 +4H20 --> 2H2O2 + N2H4
Kill him or PS5? Which one?
Drag each tile to the correct box
Arrange the steps of the scientific method in the correct order
Ask questions
Test the hypothesis
Observe,
Construct a hypothesis,
Communicate the results
Analyze the results and conclude
Answer:
Ask questions
Construct a hypothesis
Test the hypothesis
Observe
Analyze the results and conclude
Communicate the results
What is the name of the molecule shown below?
O A. 2-octene
B. 3-octene
C. 3-octyne
O D. 2-octyne
Answer:
2-octene
Explanation:
A P E X
2-octyne is the name of the molecule given. Therefore, the correct option is D.
An organic substance having the chemical formula [tex]C_8H_1_4[/tex] is 2-octyne. It has a triple bond between the carbon atoms, which makes it an alkyne. The triple bond is located at the second carbon position in the octane chain, as indicated by the systematic IUPAC name of this molecule, 2-octane. 2-Octyne is an odorless, colorless liquid that is insoluble in water.
It can participate in various functional group transformations and undergo addition reactions. It can be used in organic synthesis as a building block for the construction of more complex compounds. It can also be used as a solvent or mediator in chemical processes.
Therefore, the correct option is D.
Learn more about Chemical formula, here:
https://brainly.com/question/32018188
#SPJ6
what is energy?
(in your own words but keep it short)
Answer:
The capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, etc.