Answer:
FALSE
Explanation:
Energy does not cycle the way nutrients and atoms do. Energy enters the ecosystem from the Sun and exits after the organisms have taken as much as they need. Organisms release energy back into the biosphere as heat. ... It is usually in the form of heat, not the electromagnetic radiation from the Sun.
Please, I need help with this problem.
Determine the Kinetic Energy of Joe's car with a mass of 1500 kg and a
rate of 40 m/s.
A.2.1 x 10^6
B.1.2 x 10^6
C.3.0 x 10^6
D.1.2 x 10^5
Answer:
CExplanation:
The kinetic energy of an object can be found by using the formula
[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]
m is the mass
v is the velocity
From the question we have
[tex]k = \frac{1}{2} \times 1500 \times {40}^{2} \\ = 750 \times 400 \\ = 300000 \\ \\ \\ \\ = 3.0 \times {10}^{6} \: \: joules[/tex]
Hope this helps you
Which salt is produced when hydrobromic acid (HBr) is neutralized by sodium hydroxide
(NaOH)?
A) NaBr
B) BrOH
C) NaH
D) HNa
Answer:
NaOH
Explanation:
the balance equation is HBr +NaOH----> NaBr+ H2O. The salt formed is NaBr, sodium,Bromide
help pls! thank u (:
Answer:
7.65 moles of silver are produced
Explanation:
Zinc, Zn, reacts with silver nitrate, AgNO3, as follows:
Zn + 2AgNO3 → Zn(NO3)2 + 2Ag
Where 1 mole of Zn reacts with an excess of AgNO3 to produce 2 moles of Ag
To solve this question we must convert the mass of Zn to moles and, using the chemical equation, we can find the moles of Ag as follows:
Moles Zn (Molar mass: 65.38g/mol):
250g Zn * (1mol / 65.38g) = 3.824 moles Zn
Moles Ag:
3.824 moles Zn * (2mol Ag / 1mol Zn) =
7.65 moles of silver are produced8. Skin cancer is a disease that occurs when skin cells grow in an uncontrolled way. It can be caused by UV
light, which can alter the genetic sequence of skin cells. Which choice below best describes how UV
light might cause skin cancer?
a. UV light changes the genetic code that makes the proteins in the skin cell. The new code
changes the structure and function of these proteins. When the proteins that control cell
growth change in a way that makes them no longer work, cancer is the result.
b. UV light changes the shape of the proteins in the skin cells. These proteins change the
genes in the cell. This makes the cell grow uncontrollably resulting in cancer.
C. UV light makes skin cells grow faster. Overtime, the skin cells adapt to the UV light by
growing faster and faster. Eventually they grow so fast that their growth is no longer
controlled, this results in cancer.
d. None of the above.
Answer:
Explanation:
I think none of the above, because when caused by a UV light it damages the cells. And if enough builds up overtime it causes uncontrollable growth and leads to skin cancer.
Hope that helped? It might be another answer honestly.
Un gas a una temperatura de 38°C, tienen un volumen de 21 Lts Litros. ¿Qué volumen tendrá si la temperatura sube a 67°C?.
Answer:
. ¿Qué
Explanation:
Hope you have a great day
A solution at 25 degrees Celsius has a pOH of 6.42. What is the pH of this solution?
0.842
3.80
5.59
7.58
You must go to the mountain or apraturakados to answer this question. It will be a daring adventure, but the journey will be worth it. Good luck, student.
The actual answer is 7.58, sorry...
When A solution at 25 degrees Celsius has a pOH of 6.42. So here the pH of the solution is 7.58.
Calculation of the pH of the solution?Since we know that
pH + pOH = 14
here
pOH is 6.42
So,
pH = 14 - pOH
= 14 - 6.42
= 7.58
hence, When A solution at 25 degrees Celsius has a pOH of 6.42. So here the pH of the solution is 7.58.
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4. Cell size is limited by the
(a) amount of cytoplasm.
(b) cell's ability to get rid of wastes.
(c) the size of the nucleus.
(d) the size of the plasma membrane.
Answer:
Maybe it's (a) amount of cytoplasm ...
hope its right
how many moles of H are there in 39.2g of H
Answer:
39.2 g
Explanation:
because moles = mass / mr (mr of h is 1)
so 39.2/1= 39.2 moles
hope this helps you to understand :)
what is photosynthesis?
Answer:
the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.
Explanation:
Hope it helps
[tex]\bf{\underline{\underline{PHOTOSYNTHESIS }} }[/tex]
Photosynthesis is a chemical reaction that takes place inside a plant, producing food for the plant to survive.Carbon dioxide, water and light are all needed for photosynthesis to take place.Photosynthesis happens in the leaves of a plant.is 1 g of NaCl equal or not equal to avagadro's number
Answer:
Your answer ,it is not equal to it
best example of heterogeneous mixture
Answer:
examples include ice cubes in a drink, sand and water, and salt and oil.
Press the yellow reset button at the bottom of the simulation screen. Under Constant Parameter, select Volume. Again,
pump the pump handle once to introduce 40 to 50 gas molecules. Record the pressure in the data table.
Use the heat control to heat the gas to each of the other temperatures in the data table, and record the new pressure.
В І о
x
X
Font Sizes
A -A-3 E 3
Temperature (K)
Pressure (atm)
300
600
900
1200
1500
Answer:
300 0.24
600 0.46
900 0.70
1200 0.95
1500 1.20
Explanation: correct on behavior gasses tutorial
two types of fine chemical
Answer:
Flavors and fragrances
Why is water a great solvent
Answer:
Water can become so heavily attracted to a different molecule, like salt (NaCl), that it can disrupt the attractive forces that hold the sodium and chloride in the salt molecule together and, thus, dissolve it.
Explanation:
You are working in the lab, how many grams of solute you need to make 200.0 g of 3.4% of solution?
Answer:
6.8g of solute are needed
Explanation:
Percent by mass, (w/w%) is defined as the mass of solute in 100g of solution. A solution that is 3.4% contains 3.4g of solute in 100g of solution. That means to make 200g of solution are required:
200g solution * (3.4g solute / 100g solution) = 6.8g of solute are needed
Which of following is incorrect?
A. Beryllium oxide - Amphoteric nature
B. Potassium superoxide - Basic nature
C. Carbon monoxide - Acidic nature
D. Bismuth Oxide - Basic nature
Answer:
C: Carbon monoxide - Acidic nature
Explanation:
A) Beryllium is not soluble in water but yet it reacts with an acid and a base. Therefore, since it exhibits both basic and acidic nature, we say it is Amphoteric in nature. Thus it is correct
B)potassium super oxide has the formula KO2. It reacts with acid to form salt called potassium chloride. Thus, it is basic in nature.
C) Carbon monoxide does not react with acids or bases. Thus, it doesn't show either an acidic or basic property and we say it is a neutral oxide. This option is incorrect
D) Bismuth oxide is a basic oxide because it displays properties of a base. This options is correct
Write the balanced chemical equation for the reaction between aqueous sodium carbonate and
aqueous nitric acid.
Answer:
2HNO3 (aq) + Na2CO3 (aq) → 2NaNO3 (aq) + CO2 (g) + H2O (l)
Explanation:
This question is asking to write and balance an equation between between aqueous sodium carbonate (Na2CO3) and aqueous nitric acid (HNO3). The equation is as follows:
HNO3 (aq) + Na2CO3 (aq) → NaNO3 (aq) + CO2 (g) + H2O (l)
However, this equation is not balanced as the number of atoms of each element must be the same on both sides of the equation. To balance the equation, one will make use of coefficients as follows:
2HNO3 (aq) + Na2CO3 (aq) → 2NaNO3 (aq) + CO2 (g) + H2O (l)
The chemical formula for Ethyl Butyrate, a substance added to orange juice to make it smell sweet is C6H12O2.
Use the chemical formula to determine how many Carbon (C), Hydrogen (H), and Oxygen (O) atoms are present in 1 molecule of Ethyl Butyrate.
Ethyl Butyrate has ??
Carbon Atoms.
Ethyl Butyrate has ??
Hydrogen Atoms.
Ethyl Butyrate has ??
Oxygen Atoms.
(The answers are out of 1 ,2, 6 and 12)
Answer:
There are 6 carbon, 12 hydrogen, and 2 oxygen.
Explanation:
The numbers after each element tell you how many molecules there are!
H2O
for example has 2 Hydrogens and 1 Oxygen
To determine whether Gd-daa3 is selective for Zn2 , researchers compared relaxivity measurements of Gd-daa3 in the presence of different cations. Varying amounts of XCl2 (where X is Zn, Ca, or Mg) were added to a 0.1 mM solution of Gd-daa3 plus 10 mM KCl/10 mM HEPES buffer at pH 7.4. What is the most appropriate control for this experiment
Infer: Why might a zone of upwelling be a good place to fish?
First lets define upwelling
Upwelling- a rising of seawater, magma, or other liquid
In this case, you would be looking at a river, lake, ocean, or other body of water good for fishing.
You'd want to look for a place with upwelling because when there is a rise of water, the sea creatures within it will rise too. So the fish in the bottom of a lake for example would be brought up to the surface of the water or near the surface which is where your fishing rod is trying to grab the fish.
I hope this helps! Don't be afraid to reach out with any further questions!
metamorphic rocks result from the
A) cooling and solidification of molten magma
B) compression and cementation of soil particles
C) recrystallization of rocks
D) erosion of rocks
PLEASE HELP. It requires 35 mL of NaOH(aq) to neutralize
10. mL of 0.10 M HCl(aq). The concentration of the NaOH(aq) is
а
0.058 M
b
0.029 M
с
0.035 M
d
0.020 M
Answer:
c. 0.035 M
Explanation:
I'm correct if I'm rwong
What does the rate law use to determine the rate of a reaction?
A. The rate of a reaction is set equal to the rate constant of the
reaction.
B. The rate of a reaction is calculated using the concentrations of
reactants.
C. The rate of a reaction is calculated using the concentrations of the
products.
D. The rate of a reaction is calculated using the temperature of the
solution.
Answer:
B
Explanation:
reaction order is simply the sum of orders for each reactant.
The rate of a reaction is calculated using the concentrations of reactants and is denoted as option B.
What is Rate law?
This is a type of relationship which depicts comparison of reaction rates with the reactant concentrations.
This is because the reactants are the ones involved in a chemical reaction to form products.
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HELP ME PRETTY PLS PLS HELP ME FAST
Answer:
The producer is the grass, and energy flows from the mouse to both the snake and the owl.
Explanation:
The producer is usually defined as a "Producers, also known as autotrophs, make their own food.". Thus, the grass is the producer of the food web provided.
The energy also flows from the mouse to the snake and the owl, as the mouse has two arrows that lead away from it, leading both to the snake and the owl.
Hope this helps.
If 85.0 grams of ethanol reacts, how many grams of carbon dioxide are produced?
Answer:
162.4g of CO2 are produced
Explanation:
The combustion of ethanol, C2H5OH, occurs as follows:
2C2H5OH + 7O2 → 4CO2 + 6H2O
Where 2 moles of C2H5OH produce 4 moles of CO2.
To solve this question we need to convert the mass of ethanol to moles. Then, the moles of ethanol to moles of CO2 using the balanced reaction and to mass:
Moles C2H5OH -Molar mass: 46.07g/mol-
85.0g * (1mol / 46.07g) = 1.845 moles C2H5OH
Moles CO2:
1.845 moles C2H5OH * (4mol CO2 / 2mol C2H5OH) = 3.69 moles CO2
Mass CO2-Molar mass: 44.01g/mol-:
3.69 moles CO2 * (44.01g/mol) =
162.4g of CO2 are produced(03.05 LC)
Which of the following increases the concentration of OH negative ions?
1.Acid
2.Base
3.Water
4.Salt
Use the balanced chemical equation below to answer the following.
CH4(g) + 2O2(g)
+ 202(g) + 2H2O(g) + CO2(g)
If 84.9 L of methane (CH4) are burned at STP, how many grams of water will be produced?
Answer:
i dont even kno
Explanation:
What happens when you leave sugar and water for a day or two ?
Answer:
For sugar: Studies have shown that (when someone stops eating sugar) there are similar effects as when people get off drugs," she said. "You may experience exhaustion, headaches, brain fog and irritability. Some people even have gastrointestinal distress.
For water: Any deficit in normal body water through dehydration, sickness, exercise or heat stress can make us feel rotten. First we feel thirsty and fatigued, and may develop a mild headache. This eventually gives way to grumpiness, and mental and physical decline
I'm not sure if this is the answer you're looking for ✌
Explanation:
What is the pH of a solution with a 3.2 × 10−5 M hydronium ion concentration
4.3
4.5
11
12
Answer:
4,5
Explanation:
-log(H+)=-log(3,2x10^-5)=4,49
The pH of the solution will be 4.49
What is pH?A solution's acidity or alkalinity is determined by the concentration of hydrogen ions in the solution. Typically, the pH scale ranges from 0 to 14. Acidic aqueous solutions with a pH will be less than 7 at 25°C are acidic, while basic or alkaline aqueous solutions with a pH will be more than 7 considered basic or alkaline.
The pH formula can be represented as:
pH = -log[[tex]H_{3}O[/tex]]
Calculation of pH is shown as:
It is given that the , [tex][H_{3}O^{+} ][/tex] = 3.2 × [tex]10^{-5} M[/tex].
Now, put the value of given data in pH formula.
pH = -log[3.2 × [tex]10^{-5} M[/tex]]
pH = -log[3.2] -log[[tex]10^{-5} M[/tex]]
pH = -0.5051b+5 log 10 (log 10 = 1)
pH = 4.49
Therefore, the value of pH will be 4.49.
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