Explanation:
like all metals,calcium carbonate reacts with acidic solution to produce carbon dioxide
16. Which list shows units of a single organ system, in order from the smallest unit to the
largest unit of organization.
(2 points)
1. red blood cell, nervous system, skin, stomach
2. circulatory system, heart, cardiac muscle, muscle cell
3.hepatic cell, liver tissue, liver, digestive system
The list that correctly shows units of a single organ system, in order from the smallest unit to the largest unit of organization is as follows: hepatic cell, liver tissue, liver, digestive system.
What is level of organization?The level of organization of life shows the hierarchical arrangement of the components that make up life.
The levels of organization are as follows:
Cell - simplest unit of lifeTissue - group of cells that work together to perform similar functionOrgan - group of tissues Organ system - group of organs that work togetherTherefore, the list that correctly shows units of a single organ system, in order from the smallest unit to the largest unit of organization is as follows:
hepatic cell, liver tissue, liver, digestive system
Learn more about level of organization at: https://brainly.com/question/14501995
Li + H2O + LiOH + H2
How do I balance this?
Answer:
2Li + 2H2O → 2LiOH + H2
Explanation:
Lithium + Water = Lithium Hydroxide + Dihydrogen
Molecules are always in motion. True False
Answer: FALSE
Explanation:
Given a gas with an initial volume of 3.0 L and a temperature of 290 K, what is the final volume if the
temperature is 273 K?
Plzzz neeed this really quick
Answer:
2.8l
Explanation:
just make v2 de subject
Get it right :D if this is wrong or not correct ill give u a bad review And no brainiest
Answer:
In short, because we are tearing up the oxygen factories to make way for carbon dioxide emitters. (Doesn't make a lot of sense, read the explanation)
Explanation:
So, 1000 years ago, we had a lot more trees, didn't have engines or cars or factories or anything, really that released carbon dioxide into the air and we had a lot more trees and since the invention of cars, engines, carbon dioxide-emitting tools and factories and all the other things that emit "Greenhouse gases" and in doing that, cleared more trees to make room for factories and roads and that has drastically changed the outlook of the carbon cycle.
1. How many grams of NaOH are needed to react with two moles of H2SO4? 2NaOH + H2SO4 Na2SO4 + 2H20
Explanation:
Explanation:
Given the molecular weights:
M
r
N
a
O
H
=
40
g
m
o
l
M
r
N
a
2
S
O
4
=
142
g
m
o
l
The analogy of the moles will be held constant:
n
N
a
O
H
n
N
a
2
S
O
4
=
2
1
n
N
a
O
H
n
N
a
2
S
O
4
=
2
For each one, substitute:
n
=
m
M
r
Therefore:
n
N
a
O
H
n
N
a
2
S
O
4
=
2
m
N
a
O
H
M
r
N
a
O
H
m
N
a
2
S
O
4
M
r
N
a
2
S
O
4
=
2
200
40
x
142
=
2
200
⋅
142
40
x
=
2
200
⋅
142
=
2
⋅
40
x
x
=
200
⋅
142
2
⋅
40
=
100
⋅
142
40
=
10
⋅
142
4
=
1420
4
=
=
710
2
=
355
g
r
a
m
s
(or just use a calculator
Please help it’s my final
Balance the Equation
Fe
+
HF
FeFz
+ H2
What is the pH of a 3.5 x 10-5 M solution of HCl?
Answer:
4.46
Explanation:
Applying,
pH = -log(H⁺)....................... Equation 1
Where H⁺ = Hydrogen ion concentration of HCl solution
From the question,
Given: H⁺ = 3.5×10⁻⁵ M
Substitute these values into equation 1
pH = -log(3.5×10⁻⁵)
pH = 4.46
Hence the pH of HCl solution is 4.46
PLZZ HELP!!!!!!! What is PH
What is the pH of an HCl solution if [H+] = 0.03?
A. 0.03
B. 1.5
C. 3.0
D. 3.5
Answer: B
Explanation:
1.5 :D
help me get this right
Answer:I’m 100% it’s the second one
Explanation:
I have done it before and missed one but not this question
hey guys you should all call this number and leave a funny voicemail
5082036290
heheh
GO CRAZY
Answer:
Who's number is it LOL
Explanation:
Answer:
okay
Explanation:
What is a cell? Please help
Explanation:
A cell is the membrane unit that contains all the fundamental molecules to living life. To make it short nd easy, a cell is the smallest nd basic unit of life, it's responsible for all life's processes. The human body is comped of m(tr)illions of cells, they all each provide different types of functions.
PLZ HELP! IN YOUR OWN WORDS! :D
How does changing frequency and wavelength affect how you hear sound?
Answer:
wavelength is inversely proportional to frequency.
frequency determines pitch of sound.
we hear sound differently.
when the wavelength or distance is short we Hear high sound .
when the wavelength or distance is high we Hear low sound .
2 C5H5 + Fe = Fe(C5H5)2
use of sodium trioxocabonates iv
Answer:
Sodium hydrogen trioxocarbonate(IV) is also known as baking soda, and has the molecular formula NaHCO3. Industrial Preparation of NaHCO3. The salt is manufactured industrially by the solvay process by saturating a wet mush of Na2CO3 obtained from the solvay process with CO2. Na2CO3(aq) + H2O(l) + CO2(g) → 2NaHCO3(s)
Explanation:
Hope it helps
FOLLOW MY ACCOUNT PLS PLS
The molecules of a substance formed a rigid repeating crystal structure. Then, a phase change occurred. That structure is now more like clusters of molecules moving past one another. What phase change caused this change? Plz, explain your answer.
A
condensing
B
evaporating
C
freezing
D
melting
Answer: everybody report fNnasks he doesn't answer nobody question if you see it like you told me do it yourself science is super easy
Explanation:
Conservation of matter means that:
55
Matter is never created nor destroyed.
Matter is always created and destroyed.
Matter always turns into energy
Matter is flexible, it can be created destroyed, or turned into energy
Answer:
Matter is never created or destroyed
According to his prelaboratory theoretical yield calculations, a student's experiment should have produced 1.44g of magnesium oxide. When he weighed his product only 1.23g of magnesium oxide was present. What is the student percent yield?
The percent yield of the product formed in the experiment is 85.41%.
What is percent yield?Percent yield is defined as the ratio of actual yield to the theoretical yield multiplied by 100. If the actual and theoretical yield are same then the percent yield is 100%.If actual yield is less than the theoretical yield then the percent yield is less than 100%.Reason of this condition arising is the incompletion of reaction or loss of sample during recovery process.
In cases where percent yield is over 100% it indicates that more sample is recovered than the predicted amount.This condition arises when there are other simultaneous reactions taking place leading to the formation of product. It can also arise if there is incomplete removal of impurities from the sample .
In the given example, actual yield=1.23 g and theoretical yield=1.44 g
Thus on substituting values in the given formula, 1.23/1.44×100=85.41 %.
Thus , the percent yield of sample is 85.41%.
Learn more about percent yield,here:
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Question 1
A molecule contains carbon, hydrogen and oxygen. For every carbon atom there are
twice as many hydrogen atoms but the same number of oxygen atoms.
What is the formula of the molecule?
А
CH 0
B
C2H4O2
C
C,H,O2
D
C,H,O2
The required molecule is :
=》option B.) C2H4O2
it has 2 carbon atoms, 4 hydrogen atoms which it twice the number of carbon atoms and 2 oxygen atoms same as carbon.
Phosphorus-33 has a half-life of 25 days. What fraction of the original sample would remain after 300 days?
Answer:
The correct answer is - 1/4096.
Explanation:
In the starting, there is that the number of atoms is N 0 .
The number of half-lives in this case, = 300/ 25 = 12
After the first half-lives or 25 days, N 1 = N 0 /2
the half life is that time where half of the sample had decay.
After the second half-life or 50 days, N 2 = N 1 /2 = N 0 /4 .
There is division by two the original amount, then after four times you divide four times for 2 that means that you divide by 2 ^12 =4096 .
So the final amount remain is N 12 = N 0 /4096 or 1/4096.
help me get it right and no links
Answer:
limited
Explanation:
have a good day :)
which one of the following are not steps of a balanced equation?
Answer:
Dealing with the states of both the reactant and product elements
What type of mirror could have resulted in the image of the giraffe above?
Answer:
A convex mirror
Explanation:
Good luck on the test m8!
A convex mirror could have resulted in the image of the giraffe above. A mirror is a surface which reflects almost all types of light that strike it
What is mirror?A mirror is a surface which reflects almost all types of light that strike it, according to physics. Furthermore, unless or until an opaque item is placed between both the reflecting surface as well as the source of light, a mirror will continue to reflect light in a regular manner.
In actuality, the reflection principle underlies how mirrors function. As far as we are aware, light is either reflected or absorbed. Whenever a mirror is present, light is reflected. Because a mirror has a flat surface just at microscopic level, light is reflected when it strikes one. A convex mirror could have resulted in the image of the giraffe above.
Therefore, a convex mirror could have resulted in the image of the giraffe above.
To learn more about mirror, here:
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list a few reasons why the oxygen level decreases in case
Answer:
Blood oxygen level is the amount of oxygen circulating in the blood. Most of the oxygen is carried by red blood cells, which collect oxygen from the lungs and deliver it to all parts of the body.Blood oxygen level is the amount of oxygen circulating in the blood. Most of the oxygen is carried by red blood cells, which collect oxygen from the lungs and deliver it to all parts of the body.The body closely monitors blood oxygen levels to keep them within a specific range, so that there is enough oxygen for the needs of every cell in the body.Blood oxygen level is the amount of oxygen circulating in the blood. Most of the oxygen is carried by red blood cells, which collect oxygen from the lungs and deliver it to all parts of the body.The body closely monitors blood oxygen levels to keep them within a specific range, so that there is enough oxygen for the needs of every cell in the body.A person’s blood oxygen level is an indicator of how well the body distributes oxygen from the lungs to the cells, and it can be important for people’s healthExplanation:
"Oxygen fuels our living processes. It contracts our muscles, helps our cells to work, grow and regenerate, feeds our brains, calms our nerves, helps the heart to pump, cleanses the body of toxins, fights infection and boosts immunity," says Dr Jena, Director, Institute of Emergency Medicine, Mission Hospital & Research Center , Madurai.
Lungs:
Once air enters the nose or mouth, it gets humidified and reaches the oliveoli, tiny air sacs that help to pull in oxygen and transfer it into the blood stream and also to pull out the carbon dioxide and push it out of the lungs and back up to breathe out. destroys these oliveoli by thickening the walls so gas exchange becomes difficult.
Heart :
The left side of your heart receives oxygen-rich blood from your lungs and pumps it through your arteries to the rest of your body. The right side of your heart receives oxygen-poor blood from your veins and pumps it to your lungs, where it gets rid of the carbon dioxide and picks up oxygen. Inan increase in oxygen demand occurs because of compromised lungs and fear (that excites the body). This may lead to heart damage, especially if the arteries were already clogged.
this may help you hope so
We can preserve natural resources by
А
drilling for as much oil as possible for just 10 years
B
using mostly trees for energy
с
relying on renewable energy sources
D
burning more fossil fuels
Answer:
drilling for as much oil as possible for just 10 yearsExplanation:
2H2 + O2 → 2H2O
"PLEASE HELP ASAP"
Which of the following statements would be correct if one mole of hydrogen was used in this reaction? (5 points)
One mole of oxygen was used in this reaction.
Two moles of oxygen were used in this reaction.
One mole of water was produced from this reaction.
Two moles of water were produced from this reaction.
Answer:
- One mole of oxygen was used in this reaction.
- Two moles of water were produced from this reaction.
Explanation:
In addition: - Two moles of hydrogen were used.
Given the data from the question, the correct statement is:
One mole of water, H₂O was produced from the reaction Basic conceptTo know which options are correct, we shall determine the number of mole of O₂ used and the number of mole of H₂O produced.
How to determine the mole of O₂ usedBalanced equation
2H₂ + O₂ —> 2H₂O
From the balanced equation above,
2 moles of H₂ required 1 mole of O₂
Therefore,
1 mole of H₂ will require = 1 / 2 = 0.5 mole of O₂
Thus, 0.5 mole of O₂ is needed for the reaction
How to determine the mole of H₂O producedFrom the balanced equation above,
2 moles of H₂ reacted to produce 2 moles of H₂O
Therefore,
1 mole of H₂ will also react to to produce 1 mole of H₂O
Thus, 1 mole of H₂O was produced from the reaction.
SUMMARY
When 1 mole of H₂ was used in the reaction,
0.5 mole of O₂ was used 1 mole of H₂O was producedConsidering the options given in the question above, the correct statement is:
1 mole of H₂O was producedLearn more about stoichiometry:
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When nutrients, water, and materials cross a cell membrane without requiring energy from the cell, the process is called
A: Active Transport
B: homeostasis
C: Selective Permeability
D: Diffusion
Which of the following prefixes would show up in the name for SF6? Hexa, penta, tetra, hepta, and mono
Answer:
Sulfur hexafluoride
Explanation:
What is the standard cell notation of a galvanic cell made with zinc and gold?
A. Zn2+(aq) | Zn(s) || Au(s) | Au+(aq)
B. Au(s)| Aut(aq) || Zn2+(aq) | Zn(s)
C. Aut (aq)| Au(s) || Zn(s) | Zn2+(aq)
D. Zn(s) | Zn2+ (aq) || Aut(aq) | Au(s)
Answer:
D
Explanation: