Answer: A food chain describes how energy and nutrients move through an ecosystem. At the basic level there are plants that produce the energy, then it moves up to higher-level organisms like herbivores. ... In the food chain, energy is transferred from one living organism through another in the form of food. In ecology, a food chain is a series of organisms that eat one another so that energy and nutrients flow from one to the next. For example, if you had a hamburger for lunch, you might be part of a food chain that looks like this: grass rightarrow→right arrow cow rightarrow→right arrow human. But what if you had lettuce on your hamburger? In that case, you're also part of a food chain that looks like this: lettuce rightarrow→right arrow human
Explanation:
All organisms need glucose or a source of________ to carry out basic life functions
Answer:
chlorophyll
Explanation:
Which of the following best explains why Pangaea broke apart into the modern-day continents?
A. Earthquakes and volcanoes formed between the continents. B. Changing climate caused ice to form between the plates.
C. Balanced forces caused a change in the motion of the plates.
D. The plates underlying the continents were already in motion.
Answer:
C. Balanced forces caused a change in the motion of the plates.
Explanation:
Scientists believe that Pangea broke apart for the same reason that the plates are moving today. The movement is caused by the convection currents that roll over in the upper zone of the mantle. This movement in the mantle causes the plates to move slowly across the surface of the Earth.
Why do chemical changes happen
Answer:
Reactions occur when two or more molecules interact and the molecules change. ... Bonds between atoms are broken and created to form new molecules. That's it.
Explanation:
A ball is kicked straight up. The ball's speed decreases as it moves upward. Why does the ball's
speed decrease?
A ) Because a force given to the ball by the kick becomes equal to the force of gravity
O Because one or more forces are acting to slow the ball down
O Because a force given to the ball by the kick completely runs out
O Because a force given to the ball by the kick becomes less than the force of gravity
Answer:
I think the third one
A ball kicked straight up slows down as it moves upward because the force given to the ball by the kick completely runs out. Thus, the correct option is C.
What is Gravitational force?Gravitational force of the planet earth acts on every object which has some mass. When an object is thrown upwards the gravitational force of the earth acts against the velocity of the object such as ball and pulls the object downwards, i.e., towards itself on the ground. Thus, the object returns back towards the surface of earth.
The direction of a ball's motion while thrown upward is changing as it rises into the air when thrown. The speed of the ball decreases because the force of gravity pulls it towards the ground and makes the distance it covers decrease.
Therefore, the correct option is C.
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length = 10cm
width = 5cm
mass = 300g
height = 2cm
volume =?
density =? Pls help
Answer:
volume=100
density=100
Explanation:
to get volume you multiply length and width to get area then multiply height=100
to get density you divide mass by volume
A chemical reaction yields 1 mole of lithium hydroxide (LiOH). How many grams of
lithium hydroxide are present?
3 g
48 g
728
24 g
Mass of LiOH= 23.95 grams ≈ 24 g
Further explanationGiven
1 mole of lithium hydroxide (LiOH)
Required
Mass of LiOH
Solution
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass
n = mass : molar mass
Input the value :
mass = n x molar mass
mass = 1 mole x 23,95 g/mol
mass = 23.95 grams ≈ 24 g
The mass of 1 mole LiOH has been 24 g. Thus, option D is correct.
The mass of a compound present in a mole of sample has been equivalent to the molar mass of the compound. The molar mass of the compound has been the sum of the constituent in a formula unit.
The molar mass of lithium hydroxide (mwt) has been given as:
[tex]mwt=m_L_i\;+\;m_O\;+\;m_H[/tex]
Where, the mass of Li is [tex]m_L_i=6.941\;\rm g[/tex]
The mass of oxygen is [tex]m_O=16\;\rm g[/tex]
The mass of hydrogen is [tex]m_H=1\;\rm g[/tex]
Substituting the values for molar mass (mwt) of LiOH:
[tex]mwt=6.941\;+\;16\;+\;1\;\text g\\mwt=23.941\;\text g\\mwt=24\;\text g[/tex]
The molar mass of LiOH has been 24 g.
The molar mass has been equivalent to the mass of 1 mole of sample. Thus, the mass of 1 mole LiOH has been 24 g. Thus, option D is correct.
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How could we separate the baking soda from the after after it had already been mixed in? helppp!!!
Answer:
i thing by filtering
Explanation:
How are Epigenetic tags different from genes?
Nitrogen was heated from 17°C to 37°C. The original volume of nitrogen was 8.5 L. Find the new volume in liters assuming P and n remain the same.
Answer:
The new volume of the gas is 9.086 liters.
Explanation:
Let suppose that nitrogen has a behavior of ideal gas, the equation of state for ideal gases is:
[tex]P\cdot V = n \cdot R_{u}\cdot T[/tex] (1)
Where:
[tex]P[/tex] - Pressure, measured in atmospheres.
[tex]V[/tex] - Volumen, measured in liters.
[tex]n[/tex] - Molar amount, measured in moles.
[tex]T[/tex] - Temperature, measured in Kelvin.
[tex]R_{u}[/tex] - Ideal gas constant, measured in atmosphere-liters per mole-Kelvin.
If pressure and molar amount of the gas remain constant, then we construct the following relationship:
[tex]\frac{T_{1}}{V_{1}} = \frac{T_{2}}{V_{2}}[/tex] (2)
If we know that [tex]T_{1} = 290.15\,K[/tex], [tex]P_{1} = 8.5\,L[/tex] and [tex]T_{2} = 310.15\,K[/tex], then the new volume of the gas is:
[tex]V_{2} = \left(\frac{T_{2}}{T_{1}}\right)\cdot V_{1}[/tex]
[tex]V_{2} = \left(\frac{310.15\,K}{290.15\,K} \right)\cdot (8.5\,L)[/tex]
[tex]V_{2} = 9.086\,L[/tex]
The new volume of the gas is 9.086 liters.
The weight of an object is different on each planet because _____.
1.each planet is a different distance from the sun
2.each planet has a different force of gravity
3.mass of the object changes on each planet
4.mass changes with location
PLEASE HELP I WILL MARK AS BRAINLESS 12+ POINTS!!
Which of the following reasons BEST explains why thunderstorms are likely to form on a hot day?
A warm, humid air rises quickly and then condenses into rain clouds.
B) as air rises, it loses temperature and causes rain.
C the air is usually calm and allows the clouds to form
D the air drops quickly and forms low level cloud layers.
Answer:
A
Explanation:
The high humidity, in conjunction with warm temperatures, creates massive amounts of warm, moist air rising into the atmosphere, where it can easily form a thunderstorm. As the process of evaporation and condensation occurs, these droplets collide with other moisture that is condensing as it rises.
Using the balanced equation below, how many moles of water can be produced when 4 grams of Hydrogen react? 2H2(g)+O2(g) —> 2H2O(I)
Answer:
4 × 10 g
Explanation:
Step 1: Write the balanced equation
2 H₂(g) + O₂(g) ⇒ 2 H₂O(I)
Step 2: Calculate the moles corresponding to 4 g of H₂
The molar mass of H₂ is 2.02 g/mol.
4 g × 1 mol/2.02 g = 2 mol
Step 3: Calculate the moles of H₂O produced from 2 moles of H₂
The molar ratio of H₂ to H₂O is 2:2. The moles of H₂O produced are 2/2 × 2 mol = 2 mol.
Step 4: Calculate the mass corresponding to 2 moles of H₂O
The molar mass of H₂O is 18.02 g/mol.
2 mol × 18.02 g/mol = 4 × 10 g
Which of the following is the conjugate acid of clo?
O A. clot
O B. HCIO
O C. HCI
O D. CL
Explanation:
B. HCIO these is the answer
The option that is a conjugate acid of ClO would be (B), HCIO..
What is a conjugate acid?A conjugate acid is formed when a base gains a proton. In this case, the base is ClO, which has a negative charge. When ClO gains a proton, it becomes HCIO, which has a positive charge.
The other options are not conjugate acids of ClO because they do not have a positive charge. CL is the neutral form of chlorine, and it cannot gain a proton to become a conjugate acid. Clot is not a chemical compound, and it does not exist.
In conclusion, option B is correct.
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Which of these would produce a soft sound A (a slow vibration) B (a big vibration) C (a fast vibration) or D (a tiny vibration)
Answer:
A slow vibration
Explanation:
Hard and soft refer to how much a sound vibrates. When a sound is hard the vocal cords come together and release producing a less resonant sound. In a soft sound, the vocal cords rub together creating friction and heat that results in a more resonant sound.
A salt of KCl, potassium chloride, is dissolved in a beaker of an unknown solution. It is less soluble in the unknown solution than it is in a beaker of water at the same temperature. What explains the lack of solubility in the beaker of unknown solution?
a) the solution in the unknown beaker is at a pH of 7, which reduces the ability of the salt to dissolve
b) the solution in the unknown beaker is organic, reducing the ability of the salt to dissolve in the beaker
c) the solution in the unknown beaker is polar, causing a reduction in the ability of the salt ions to dissociate
d) the solution in the unknown beaker is 0.5 NaCl, and the common chloride ion is reducing the solubility of the KCL
Answer:
D) The solution in the unknown beaker is 0.5NaCL, and the common chloride ion is reducing the solubility of the KCL .
Explanation: Just got it correct on USATESTPREP :)
How does living six months with 24 hour's of sunlight or darkness affect the human body
Answer:
you could become ill and die from certain chronic illnesses which would be caused by the lack of sun
What are the three parts of a nucleotide?
NEED NOW!!
Answer:
Each nucleotide, in turn, is made up of a nitrogenous base, a pentose sugar, and a phosphate.
Explanation:
Answer:
Each nucleotide, in turn, is made up of a nitrogenous base, a pentose sugar, and a phosphate.
Explanation: :)
Which are characteristics of scientific questions? Check all that apply.
asking about subjective matters
having a wide focus on many topics
addressing a gap in knowledge
possibly leading to a testable hypothesis
already having fully confirmed explanationsWhy aren't descriptive investigations repeatable?
Answer:
asking about subjective matters
possibly leading to a testable hypothesis
addressing a gap in knowledge
I got soo confused about that last part. I didn't know if that was an option or something you needed to be answered.
Descriptive investigations are not repeatable because they are based only on observations made at a single point in time. The results may vary at a different time. In addition, descriptive investigations do not contain variables that may indicate cause-and-effect relationships.
Answer:
its N.N.November people
Explanation:
A prairie dog eats grass. A coyote eats the prairie dog. This is an example
of *
1 point
an abiotic element.
a herbivore.
a food chain.
Answer:
This is an example of a food chain
Explanation:
Think of it as a chain reaction. The grass feeds and nourishes the prairie dog. Upon eating the prairie dog, the coyote gets the nutrients from both the grass the prairie dog ate and from the prairie dog itself.
PET is an acronym for what condensation polymer
help asap it needed
Answer:
polyethylene terephthalate
PET (also abbreviated PETE) is short for polyethylene terephthalate, the chemical name for polyester. PET is a clear, strong, and lightweight plastic that is widely used for packaging foods and beverages, especially convenience-sized soft drinks, juices, and water.
Explanation:
hope this helps have a good rest of your afternoon :) ❤
What type of atom is formed by the loss of one or more electrons?
An atom that loses one or more valence electrons to become a positively charged ion is known as a cation, while an atom that gains electrons and becomes negatively charged is known as an anion.
What tuberculosis means "
Answer:
it is a infectiousr bacterial disease characterized by the growth of nodules(tubercles) in tissues especially the lungs
hello, please can you solve my question:
an atom contains 22 protons and 26 neutrons. What is it's mass number?
I will mark brainliest
If 15.0 g CH3OH reacts with 10.0 g of CO, which is the limiting reagent and what is the theoretical yield of CH3COOH?
Answer:
Explanation:
CH₃OH + CO = CH₃COOH .
32 g 28 g 60 g
CH₃OH = 15 g ; CO = 10 g
32 g of CH₃OH reacts with 28 g of CO
15 g of CH₃OH reacts with 28 x 15 / 32 g of CO
= 13.125 g of CO .
CO given = 10 g , so CO is the limiting reagent .
28 g of CO reacts with CH₃OH to produce 60 g of CH₃COOH
10 g of CO reacts with CH₃OH to produce 60 x 10 / 28 g of CH₃COOH
CH₃COOH produced = 600 / 28 g = 21.42 g .
Answer: CO
Explanation:
a_Zn(s) + _b_AgNOs(ag) -> c Zn(NO3)(20) + d Ag(s)
The pictures below show samples of different substances.
The mass and volume of each sample differ from the mass and volume of the other samples. Is it possible for each sample to contain 1 mol of each substance?
A. No, because they have different masses.
B. No, because they have different volumes.
C. Yes, if each sample contains 6.02 x 10^23 atoms.
D. Yes, if each sample contains 2 amu.
Answer:
C. Yes, if each sample contains 6.02 x 10²³ atoms.
Explanation:
It is possible for each sample to contain 1 mole of each sample if and only if each of the sample if made up of 6.02 x 10²³ atoms.
6.02 x 10²³ atoms is the Avogadro's number. This number is equivalent to a mole of a substance.
If the amount of matter in the given substance is at least one mole, it is possible that they are made up of one mole each of each substance. If they contain lesser amount of atoms, then it is not up to one mole of substance. But if it is greater, then, we can have even more than one mole of substance.A mole is simply a unit of measurement and it is equivalent to 6.02 x 10²³ atoms.
Answer:
C
Explanation:
i just took the test
:)
Hi! It would be awesome if you could answer this soon. 20 points!
Answer:
2HgO → 2Hg + O₂
The reaction is a decomposition reaction because from one reactant two products were obtained
Explanation:
The problem here involves balancing the chemical reaction given and also classifying the reaction.
The unbalanced expression is given as:
HgO → Hg + O₂
Assign the alphabets a,b and c as coefficients that will balance the equation
aHgO → bHg + cO₂
Conserving Hg: a = b
O: a = 2c
So, let c = 1, a = 2 b = 2
Therefore;
2HgO → 2Hg + O₂
The reaction is a decomposition reaction because from one reactant two products were obtained
Hersey chocolate company makes 80 million kisses daily how many chocolate kisses are made per second
Answer:
92.5925925926
Explanation:
8 million divided by the seconds in a day witch is 86400
Answer:
There are 86,400 seconds in a day (60 seconds in a minute, 60 minutes in an hour, 24 hours in a day --- 60x60x24 = 86,400 seconds.
80,000,000 kisses per 86,400 seconds, so 80,000,000/86,400 = number of kisses per second = about 925.9 kisses per second
how can I identify a salt compound is acidic,basic,neutral
Salts that are from strong bases and strong acids do not hydrolyze. Salts that are from strong bases and weak acids do hydrolyze, which gives it a pH greater than 7. Salts of weak bases and strong acids do hydrolyze, which gives it a pH less than 7.
6) Determine la concentración de una solución que ha sido preparada añadiendo 80cc de agua a 320cc de solución alcohólica al 20% v/v. Valor: 3 puntos
Answer:
16% v/v es la nueva concentración de alcohol en la solución
Explanation:
El porcentaje volumen/volumen (% v/v) es definido como 100 veces la relación entre el volumen de soluto (Alcohol en este caso) y el volumen total de la solución (Agua + Alcohol). Para resolver esta pregunta necesitamos hallar el volumen de alcohol y el de agua:
Volumen alcohol:
320cc * (20cc etanol / 100cc) = 64cc etanol
Volumen agua:
80cc + (320cc-64cc) = 336cc agua
% v/v:
64cc / (336cc + 64cc) * 100
= 16% v/v es la nueva concentración de alcohol en la solución