Answer:
If there are fewer births than deaths, then the size of the population will decrease. Organisms in consumer populations get energy storage molecules from eating organisms in resource populations. The more energy storage molecules available to a population, the more the organisms in that population can reproduce.
A change to the green-leaf population caused the wee-bug population to change in size because wee-bug depends upon green leaves for their food.
What is the population?It is a group of organism of the same species living in a particular area.
The increase or decrease in the population of organisms depends upon factors such as available resources and predator population.
The green leaf is the food resource for wee bugs hence if the green leaf population increase then the wee bug's population will also be increased.
Therefore, a change to the green-leaf population caused the wee-bug population to change in size because wee-bug depends upon green leaves for their food.
Learn more about the population?
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A3.00 mol sample of CO2 (g) is in a rigid 6.00 L container at 400.°C.
Which of the following is the pressure of the gas?
16.4 atm
27.6 atm
200. atm
995 atm
Answer:
i'm thinking 27.6 not sure
Explanation:
How did the us stop the spread of communism during the Cold War
Answer:
With the policies of containment, the United States hoped to effectively stop the spread of communism and their newest threat. After the war, the United States and the Soviet Union had very different ideas on how to rebuild.
A model is simplified version of a more complex idea or system. It useful to help us understand something we can't actually see
A) true
B) false
Answer:
I feel like the answer is A) true
Explanation:
you create a model to help your audience understand your complex idea. There have been models made to represent ideas that we cannot see.
How many liters of ammonia gas can be formed from 24.5 L of hydrogen gas at STP?
Answer: 16.3 L of ammonia gas can be formed from 24.5 L of hydrogen gas at STP
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
The balanced chemical equation is:
[tex]3H_2+N_2\rightarrow 2NH_3[/tex]
According to stoichiometry :
[tex]3\times 22.4=67.2L[/tex] of [tex]H_2[/tex] produce = [tex]2\times 22.4=44.8L[/tex] of [tex]NH_3[/tex] at STP
Thus 24.5 L of [tex]H_2[/tex] will produce= [tex]\frac{44.8}{67.2}\times 24.5=16.3L[/tex] of [tex]NH_3[/tex] at STP
Thus 16.3 L of ammonia gas can be formed from 24.5 L of hydrogen gas at STP
Which unit is commonly used for measuring pressure?
O m3
O bar
O N/m3
O Celsius
Answer:
3
Explanation:
Answer:
bar
Explanation:
yes
The four structures that both prokaryotic and eukaryotic cells have are
Hello! Greetings from Turkey! :)
* Cell membrane
* Cytoplasm
* DNA and RNA
* Ribosome
GOOD LUCK!!
Is there massless ness in space?Why?
what is the formula for chlorine monobromide
Based on how to wrire chemical formulae, the formula for chlorine monobromide is BrCl.
What is chlorine mononbromide?Chlorine monobromide is a covalent compound formed from the covalent combination of chlorine and bromine.
The covalent bond is formed from the sharing of electrons between atoms chlorine and bromine.
Br2 + Cl2 ---> 2 BrCl
Tye formula of chlorinr monobromide is BrCl.
It is also known as bromine monochloride.
Therefore, the formula for chlorine monobromide is BrCl.
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What is the density of krypton gas (MM = 83.8 g/mol) at 3.00
atm and 100. °C?
g/L
Answer:
8.21
Explanation:
what Is The Use Of Sulpurdioxide
Sulfur dioxide is used as a food preservative, disinfectant, etc.
A 220.0 mL sample of helium gas is in a cylinder with a movable piston at 105 kPa and 275 K. The piston is
pushed in until the sample has a volume of 95.0 mL. The new temperature of the gas is 310 K. What is the new
pressure of the sample?
274 kPa
216 kPa
Piston
243 kPa
51.1 kPa
Answer:
Explanation:
what did you get?
Which of these is a learned behavior of a dog?
1.Begging for food
2.Drinking water
3.Panting on a hot day
4.Chewing on a bone
State and explain the three basic properties of element
Answer: Some are solid, some are gaseous, a few are liquid. Some are metallic: they have a peculiar lustre; some are coloured (like sulfur) or colourless. Some have a low density; some have a high density. Some are malleable and ductile; some are brittle. Some conduct electricity and heat well; some don’t.
Many metals tend to have structural uses. Nonmetallic elements less so.
Metals tend to have crystal forms featuring close-packed centro-symmetrical structures. Nonmetallic elements tend to have crystal structures featuring more open and directionally packed structures.
Some are especially toxic; some are essential to life; some are both depending on exposure level.
Most are stable; some are less so.
Some elements are highly reactive; some are almost inert (helium, neon, and argon may be completely inert in ambient conditions).
Many metals have basic oxides; quite a few oxides of nonmetallic elements form acids when they are dissolved in water. Some elements can go both ways.
There are many generalisations you can make about metallic and nonmetallic elements, and quite a few exceptions at the margins.
Explanation:
State and explain the three basic properties of element.
Answer :-Some properties of an element can be observed only in a collection of atoms or molecules of the element. These properties include color, density, melting point, boiling point, and thermal and electrical conductivity.
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Answered by - ItzMaster
For the reaction 2H2 + O2 --> 2H2O, how many grams of oxygen are needed to react 3 moles of hydrogen?
Answer:
48 grams
Explanation:
The chemical equation for the reaction is the following:
2 H₂ + O₂ → 2 H₂O
That means that 2 moles of H₂ react with 1 mol of O₂ to produce 2 moles of H₂O. We convert the moles of oxygen (O₂) by using the molecular weight (MW) as follows:
MW(O₂) = 16 g/mol x 2 = 32 g/mol
mass of O₂ = 1 mol x 32 g/mol = 32 g
So, we have the following stoichiometric ratio: 32 g O₂/2 moles H₂. We have 3 moles of hydrogen (H₂), so we multiply the moles by the stoichiometric ratio to calculate how many grams are needed:
3 moles H₂ x 32 g O₂/2 moles H₂ = 48 g O₂
Therefore, 48 grams of O₂ are needed to react with 3 moles of H₂.
Cyanobacteria, also known as blue-green algae, are a kind of bacteria found in lakes. These organisms make their own food through photosynthesis. Small animals including mayfly larvae eat the cyanobacteria, and small fish such as yellow perch eat the larvae. The small fish provide food for larger fish, such as walleye.
Choose the level of the food pyramid that represents the energy role of cyanobacteria in the lake ecosystem.
definition of atomic number
The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus. In an uncharged atom, the atomic number is also equal to the number of electrons.
Answer:
its basically represents the number of protons in the nucleus which in a neutral atom equals the number of electrons outside the nucleus and that determines the place of the element in the periodic table
Explanation:
sry i its too long
hope it helps
At a football stadium, 5% of the fans in attendance were teenagers. If there were 160 teenagers at the football stadium, what was the total number of people at the stadium?
Answer:
yes
Explanation:
bc god exist
Answer:
3200
Explanation:
1.
What is Mendeleev is known for?
A. creating today's atomic model
B. discovering protons
C. publishing the first periodic table
D. discovering Mendelevium
Answer Choice: C
Explanation: Mendeleev is best known for publishing the first periodic table of elements in 1869, revolutionizing the world's understanding of physics and chemistry; and, really almost every aspect of science.
what type of cells are these?
(Plant or animal)
Answer:
5 is an animal cell, 6 is a plant cell
Explanation:
hope this helps!
Which explains why mixtures can be separated?
A The components have different properties.
B The components have the same properties.
C The components are always made of small particles.
D The components are always made of large particles.
Answer:
A
Explanation:
In chemistry, a mixture is a material made up of two or more different substances which are not chemically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions, and colloids.
Answer:
A
Explanation:
Mixtures can be separated because the different substances have different properties
zinc + hydrogen arsenate—>
What type of reaction is this? (Synthesis, Decomposition, or Single Replacement?
Answer:
Single Replacement
Explanation:
im just smart lol
Two containers, illustrated below, are filled with the same amount and the same kind of ideal gas.
Which statement correctly describes the relationship between the contents of the two containers?
Container 1 particles have higher average kinetic energy and higher temperature than Container 2 particles.
Container 1 particles have lower average kinetic energy and lower temperature than Container 2 particles.
Container 1 particles have lower average kinetic energy and lower temperature than Container 2 particles.
Container 1 particles have lower average kinetic energy and higher temperature than Container 2 particles.
Container 1 particles have lower average kinetic energy and higher temperature than Container 2 particles.
Container 1 and Container 2 particles have the same average kinetic energy and the same temperature.
Container 1 and Container 2 particles have the same average kinetic energy and the same temperature.
Answer:
Container 1 particles have lower average kinetic energy and higher temperature than Container 2 particles.
Explanation:
Kinetic energy is the speed of the particles in the bottle.
As you can see in the illustration below, the patricles in Picture 2 are moving faster than the ones in Picture 1.
The tempature of Container 1 is higher because all of the particles are sitting on top of one another. Not being able to move, their pressure builds up and creates heat.
what ive learned about heat,sound and light
Answer:
they are all in parts of our life and we need them each for surviving.
Explanation:
Science 3 questions with brainliest
Answer:
#1 is c #2 is d and #3 isd
Explanation:
please help me with this chem question!!
Answer:
caca123
Explanation:
UM
Balance the following equation: Fe2O3 + H2O --> Fe(OH)3
A.3,2,1
B.2,2,3
C.1,3,2
D.5,2,10
Answer:
answer is c
Explanation:
hope it helps!!!
THIS IS A THREE PART QUESTION IF YOU CAN HELP IT WOULD BE REALLY APPRECIATED SO I DONT FAIL.
1. If I add 2.65L of water to 245 grams of sodium acetate, what is the molarity of the NaC2H3O2 solution?
A. 10.8 m
B. 1.13 m
C. 1.08 m
D. 92.4 m
2. If I add 2.65 L of water to 245 grams of sodium acetate, what is the % by mass of NaC2H3O2 in this solution?
A. 8.46%
B.1.12%
C.10.8%
D.9.25%
3. If I add 2.65 L of water to 245 grams of sodium acetate, what is the mol fraction of NaC2H3O2 in this solution?
A. 0.203
B. 0.0846
C. 0.108
D. 0.0199
Answer:
1. B = 1.13M
2. A. 8.46%
3. D = 0.0199
Explanation:
1. Molarity of a a solution = number of moles of solute/ volume of solution in L
Number of moles of solute = mass of solute/molar mass of solute
Molar mass of NaC₂H₃O₂ = 82 g/mol, mass of NaC₂H₃O₂ = 245 g
Number of moles of NaC₂H₃O₂ = 245 g / 82 g/mol = 2.988 moles
Molarity of solution = 2.988 mols/ 2.65 L = 1.13 M
2. Percentage by mass of a substance = mass of substance /mass of solution × 100%
Mass of 2.65 L of water = density × volume
Density of water = 1 Kg/L = 1000 g/L; volume of waterb= 2.65 L
Mass of water = 1000 g/L × 2.65 L = 2650 g
Mass of solution = mass of water + mass of solute = 245 + 2650 =2895 g
Percentage by mass of NaC₂H₃O₂ = 245/2895 × 100% = 8.46%
3. Mole fraction of NaC₂H₃O₂ = moles of NaC₂H₃O₂/moles of solution
Moles of water = mass /molar mass
Mass of water = 2650 g; molar mass of water = 18 g/mol
Moles of water = 2650 g / 18 g/mol = 147.222 moles
Moles of solution = moles of solute + moles of water = 147.222 + 2.988 = 150.21
Moles of NaC₂H₃O₂ =2.988 moles
Moles fraction of NaC₂H₃O₂ =2.988/150.21 = 0.0199
Clasifica cada uno de los siguientes incisos como sustancia pura (elemento y compuesto) o mezcla (homogénea y heterogénea). Explica brevemente. (a) arroz con leche (b) agua de mar (c) magnesio (d) gasolina
Answer:
Ver explicacion
Explanation:
Un arroz con leche es una mezcla heterogénea porque está compuesto por partículas sólidas de diferentes tipos y tamaños.
El agua de mar es una mezcla homogénea de sustancias todas en la misma fase.
El magnesio es una sustancia pura y es un elemento.
La gasolina es una mezcla homogénea de sustancias comúnmente utilizadas como combustible.
Acids are what and can destroy your skin and bones.
Answer:
Yes
Explanation:
Hydrofluoric acid (HF) differs from other acids because the fluoride ion readily penetrates the skin, causing destruction of deep tissue layers, including bone.
What fossil helped support Wegener's hypothesis of continental drift?
A. Gondwanaland
B. Kannemeyerid
C. Mesosaurus
D. Glossopteris
Answer:
Glossopteris
Explanation:
Glossopteris is a fossil fern that helped support Wegener's hypothesis.
Hope this helps! Have a great day!
