Answer:
if there would have been no decomposers on Earth, the whole of the Earth would have been filled with dead and decaying matter of plants and animals.
Explanation:
I hope this helps :3
Answer: Imagine what would happen if there were no decomposers. Wastes and the remains of dead organisms would pile up and the nutrients within the waste and dead organisms would not be released back into the ecosystem. Producers would not have enough nutrients.
Explanation:
https://www.ck12.org/biology/consumers-and-decomposers/lesson/Consumers-and-Decomposers-MS-LS/#:~:text=Imagine%20what%20would%20happen%20if,would%20not%20have%20enough%20nutrients.
This is the site I got the info on, just so you know! I hope this helps!
2. Use the information to answer the following question.
Ammonia (NH3) readily dissolves in water to yield a basic
solution
NH3 + H20 NH, + OH
How is this substance classified?
O A Arrhenius Base
OB. Arrhenius Acid
OC Bronsted-Lowry Base
D. Bronsted-Lowry Acid
Answer:
the answer is going to be D.
Ammonia (NH3) readily dissolves in water to yield a basic solution as it is a Bronsted-Lowry Acid as per Lowry-Bronsted concept.
What is Lowry-Bronsted concept?
According to Lowry-Bronsted concept, acid can be defined as a substance which donates a proton and forms its conjugate base while base is a substance which accepts a proton and forms its conjugate acid.
Conjugate base which is formed from acid accepts a proton and acid is reformed, while conjugate acid which is generated from base donates a proton and base is regenerated.
The theory involves the transfer of protons between an acid and a base.They are also classified depending on their ability to donate and accept protons .Strong Lowry-Bronsted acid and bases are those which loose and accept protons easily while weak Lowry-Bronsted acids and bases are those which do not loose and accept protons readily.
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What is an Independent Variable (IV)? *
here's your answer dear friend❤❤
How does natural selection, or the concept of “survival of the fittest,” affect us?
Answer:
I hope this helps you! :)
Explanation:
Survival of the fittest" is a popular term that refers to the process of natural selection, a mechanism that drives evolutionary change. Natural selection works by giving individuals who are better adapted to a given set of environmental conditions an advantage over those that are not as well adapted.
help meeeeee please #2
Answer:
Red litmus paper turns blue in the presence of a base
Red litmus paper turns red in the presence of a acid
WILL MARK BRAINLEISTTTT
HELPPPPPP
Substitute symbols and formulas for names and write balanced equations for each of the
reactions described below.
a) When copper(II) carbonate is heated, it forms copper(II) oxide and carbon dioxide gas.
b) Ammonium nitrate decomposes to water and dinitrogen monoxide.
c) Barium hydroxide reacts with carbon dioxide to form barium carbonate and water.
d) Sodium reacts with water to produce sodium hydroxide and hydrogen gas.
Answer:
jkrifhcuhixjck
gvudd
Explanation:
dugucdsorfooggigj
a CUCO3(s) + ( I don't have the symbol on my phone ) delta CUo(s) + CO2(g)
b NH4NO3➡️ HNo3 + H2O
c. Ba(OH)2+CO2 ➡️ BaCO3+H20
d Na +H20 ➡️NaOH +h2
Explanation:
I think this should be it , I think that 8s the symbol for hydrogen gas if its not correct I'm sorry
Detergent is an example of what type of compound?
A.) synthetic organic compound
B.) organic compound
C.) chlorofluorocarbon
Answer : A
Explanation : Surface-active compounds/agents (surfactants) Substances which have the effect of reducing the surface tension of a solvent, an example being a detergent/surfactant or soap dissolved in water. ... Both synthetic detergents and soaps are surfactants. Surfactants See "Surface-active compounds/agents".
According to the context, a detergent is an example of a synthetic organic compound.
What is a detergent?They are a group of synthetic organic compounds that have the property of lowering the surface tension of the liquids in which they are dissolved.
These contain surfactant substances that help in penetration, soaking, emulsification, dispersion, solubilization.
Therefore, we can conclude that according to the context, a detergent is an example of a synthetic organic compound.
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Select the correct image.
The image shows the embryonic development of four different types of vertebrates. Which developmental path is most likely that of a lizard?
Answer:
what image?????
Explanation:
?
Answer:
2nd image/ image B
5) How many Kilograms are in 12 L of Chlorine Gas?
Answer: 0.03798 kilograms
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.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given volume}}{\text {Molar Volume}}=\frac{12L}{22.4L}=0.535moles[/tex]
1 mole of chlorine gas [tex](Cl_2)[/tex] weighs = 71 g
Thus 0.535 moles of chlorine gas [tex](Cl_2)[/tex] will weigh = [tex]\frac{71}{1}\times 0.535=37.98g=0.03798kg[/tex] (1kg=1000g)
Thus there are 0.03798 kilograms in 12 L of chlorine gas.
What are carbohydrates?
A. a type of base
B. a type of glyceride
C. a type of macromolecule
D. a type of amino acid
Answer:
a
Explanation:
me say so
Answer:
C
Explanation:
On the pH scale higher numbers indicate ?
Answer:
Higher numbers indicate bases- not acidic/less acidic
Explanation:
Answer:
higher the ph number means stronger base
Explanation:
What is the OH- ion concentration, in moles per liter, of an aqueous solution with a pH of 7?
A. 1 × 10-14
B. 1 × 10-7
C. 7
D. 14
Answer:
B
Explanation:
the pH scale is based on the function
1x10-14
So since pH is neutral the concentration of OH and H must be equal hence the only option in which the concetration would [OH]{H}= 1x10-14 would be when both are equal so it cannot be a or d and when they are expressed in concetration so the only option is B.
The pH of the solution can be used to give the relation between the pOH and the hydroxide ion concentration. The concentration of hydroxide ions is 1 ×10⁻⁷. Thus, option B is correct.
What is pOH?pOH is the measure of the hydroxide ion in the solution. The hydroxide concentration from pH is related as:
pH = - log [H⁺]
[H⁺] = 10⁻⁷
= 1 × 10⁻⁷
The hydroxide concentration from hydrogen concentration is calculated as:
[H⁺][OH⁻] = 1 × 10⁻¹⁴
[OH⁻] = (1 × 10⁻¹⁴) ÷ (1 × 10⁻⁷)
= 1 ×10⁻⁷
Therefore, option B. 1 ×10⁻⁷ is the hydroxide ion concentration.
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.
The graph below shows the winter precipitation in Arizona from 1995 to 2002. It also shows the survival rates of Arizona pronghorn fawns for the same period.
• Which two years had the most precipitation? (1point)
• Which two years had the best survival rates for fawns? (1 point)
• Using your knowledge of biotic and abiotic factors and information from the graph, give two reasons why precipitation and fawn population are linked. (2 points)
• Predict what would happen to the fawn population if the precipitation rate continues to go downward in 2003.
Answer:lmk when u have the answer
Explanation:
The balanced equation below represents a reaction between propane and oxygen. C3H8 + 5 O2 → 3 CO2 + 4 H2O According to this equation, which ratio of propane to oxygen is correct? 5 grams CO2 1 gram C3H8 3 moles CO2 1 mole C3H8 5 moles O2 1 mole C3H8 3 moles CO2 4 moles H2O
Answer:
5 moles O2 1 mole C3H8
Explanation:
In the question, it is mentioned about the ratio Propane and Oxygen. So the the ration will be 1:5 i.e, 5 moles of O2 1 mole C3H8. There is only one option which mentions both Propane and Oxygen and others doesn't.
Hydrochloric acid reacts with metals to produce hydrogen gas according to
the equation shown below. How many grams of a metal (X) will be
consumed in a reaction if 49.0 mL of 3.0 M HCl are used? The molar mass
of the metal (X) is 72.55 g/mol. Report your answer to the nearest tenth.
2 HCl + X --> XCl2 + H2
Answer:
5.33g of X will be consumed
Explanation:
Based on the reaction, 2 moles of HCl reacts per mole of the metal. To solve this question we must find, as first, the moles of HCl that reacted. With these moles and the chemical equation we can find the moles of X and its mass (With molar mass) as follows:
Moles HCl:
49.0mL = 0.0490L * (3.0mol / L) = 0.147 moles HCl
Moles X:
0.147 moles HCl * (1mol X / 2mol HCl) = 0.0735 moles X
Mass X:
0.0735 moles X * (72.55g / mol) =
5.33g of X will be consumedWhich has a higher boiling point: CH3CH2CH3 or CH3CH2CH2OH? Explain.
Answer:
CH3CH2CH2OH
having more boiling point than CH
3
A sample of crushed rock is found to have 4.81 x10^21 atoms of gold. How many moles of gold are present in this sample?
Answer:
0.8 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
We have
[tex]n = \frac{4.81 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{4.81}{6.02} \\ = 0.799003...[/tex]
We have the final answer as
0.8 molesHope this helps you
Given the [H+] = 3.89x10^-7M, what is the pOH?
Answer:
7.59
Explanation:
What could be an electron configuration of Na in the excited state?
Answer:
The excited state electron configuration shows when an electron is excited and jumps into a higher orbital. For example, sodium in its excited state would have an electron configuration of 1s2 2s2 2p6 3p1, compared with its ground state of 1s2 2s2 2p6 3s1.
Explanation:
1
11 points
The graph below shows the distance an object traveled in 11 seconds.
Which answer choice best describes the movement of the object between the times of 0 and 6 second on the graph?
Stopped
Moving toward the north
Accelerating
Moving at a constant speed
Answer:
Accelerating
Explanation:
Hope you get a good grade.
Convert 6.71 moles NH3 to number of molecules.
Answer: There are [tex]40.41 \times 10^{23}[/tex] molecules present in 6.71 moles of [tex]NH_{3}[/tex].
Explanation:
Given: Moles of [tex]NH_{3}[/tex] = 6.71 mol
According to the mole concept, 1 mole of every substance contains [tex]6.022 \times 10^{22}[/tex] molecules.
Therefore, molecules present in 6.71 moles are calculated as follows.
[tex]Molecules = moles \times 6.022 \times 10^{23}\\= 6.71 \times 6.022 \times 10^{23}\\= 40.41 \times 10^{23}[/tex]
Thus, we can conclude that there are [tex]40.41 \times 10^{23}[/tex] molecules present in 6.71 moles of [tex]NH_{3}[/tex].
The enthalpy of a reaction is -1207 kJ/mol. Which of the following best
describes this reaction?
Answer:
D. Exothermic
Explanation:
The enthalpy, ΔH, of a reaction is defined as the change in heat when a reaction occurs.
A reaction with ΔH > 0 is called endothermic and requires energy to be produced
A reaction with ΔH < 0 is called exothermic and produce energy when occurs (An example is the combustion of octane that produce energy that is used in engines to produce movement)
As the enthalpy of the reaction is -1207kJ/mol (ΔH < 0) the reaction is:
D. ExothermicWhich best describes the role of the nephrons ?
Nephrons collect salts to be stored for later use by the body.
Nephrons signal the bladder to release excess urine.
O Nephrons transport urine to the bladder.
Nephrons restore the substances and water the body needs.
Answer:
c
Explanation:
edge 2021
Answer:
c
Explanation:
When a solution reaches the equivalence point in a titration, which of the following is NOT true?
A). [H+] is equal to [OH-]
B). pH is close to 7
C). The volume of the titrant will be equal to the volume of the analyte
D). The moles of H+ ions will be equal to the moles of OH- ions
Answer:
I think it's B). pH is close to 7
According to Chargaff's Rule, if a segment of DNA contains 60 cytosine bases out of a total of 300 bases how many thymine bases are in the segment?
Answer:
90 Thymine bases
Explanation:
Chargaff's rules states that in the DNA of any organism, the amount of purine and pyrimidine bases must be in a 1:1 ratio. This means that the amount of Adenine and Guanine bases (purines) should be equal with their complementary pairs of Thymine and Cytosine bases respectively (pyrimidines). (A = T) + (G = C) = 100
Hence, according to this question, if there are 60 cytosine bases, this means that there will be 60 Guanine bases. 60 C + 60 G = 120 pyrimidines
300 total bases - 120 pyrimidine bases = 180 purine bases.
180/2 = 90 equal bases of Adenine and Thymine. Hence, Thymine bases will be 90.
what is the chemical name for Se8O7
Answer:
Selenium oxide
Explanation:
1. Which physical property is used to classify minerals and gems?
2. What do you get if you combine vinegar with baking soda?
3. What do you get if you combine iron, water, and oxygen?
4. Give an example of a physical change.
5. What is a chemical property of gasoline, paper, and wood?
I think these are the right answers sorry about 5...
1 are determined by the atomic structure and crystal chemistry of the minerals. or hardness
2 acid based reaction
3 rust
4 Examples of physical changes are boiling, melting, freezing, and shredding.
5 I don't know
5. How much heat is evolved when 24.9 g of propanol (C3H7OH) is burned? ΔHcomb = −2010 kJ/mol
The heat is evolved when 24.9 g of propanol (C3H7OH) is burned is 834.15 J
To solve this question, First, we need to find the number of moles present in 24.9 g of propanol.
⇒ Formula
n = M/m................. Equation 1⇒ Where:
n = number of moles M = mass of propanolm = molar mass of propanolFrom the question,
⇒ Given:
M = 24.9 gm = (12×3)+(1×8)+16 = 36+8+16 = 60 g/mol⇒ Substitute these values into equation 1
n = 24.9/60n = 0.415 mol⇒ Finally the heat evolved is
Q = nΔHQ = 0.415(-2010)Q = -834.15 JHence, The heat evolved when propanol is burned is 834.15 J
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when do electrons release photons
Answer:
Later when they are older
Explanation:
brainliest/
Why the energy difference between the removal of the 2nd and 3rd electrons is smaller than that between the removal of the 3rd the 4th electrons ?
Answer:
See Explanation
Explanation:
Let us remember the fact that electrons actually repel each other in the atom. The more the number of electrons, the greater the repulsion experienced.
Hence, as electrons are successively removed from the atom at each stage of ionization, the magnitude of repulsion due to the presence of more electrons decreases as further electrons are removed, ionization energy consequently increases. Thus, the energy difference between the removal of the 2nd and 3rd electrons is smaller than that between the removal of the 3rd the 4th electrons.
Sometimes, when the removal of the 4th electron has to occur in an inner filled shell which is more stable, a far higher amount of energy is required (a quantum jump) compared to the removal of any of the first three electrons that are present in an incompletely filled outermost shell, E.g in aluminium.
A 4.70 g nugget of pure gold absorbed 279 J of heat. The initial temperature was 29.0°C. What was the final temperature?
Answer:
Final temperature = 489.17°C
Explanation:
Given - A 4.70 g nugget of pure gold absorbed 279 J of heat. The initial temperature was 29.0°C.
To find - What was the final temperature ?
Proof -
Given that,
q = 279 J
m = 4.70 g
We know that, C = 0.129 J
Also,
We know the specific heat equation that,
q = m(ΔT)C
⇒ΔT = q ÷ mc
= 279 ÷ (4.70)(0.129)
= 279 ÷ 0.6063
= 460.17°C
⇒ΔT = 460.17°C
Now,
We know that,
Change in Temperature is the difference of final and initial Temperature
So,
ΔT = Final temp. - Initial Temp.
⇒460.17°C = Final Temp. - 29.0°C
⇒Final temperature = 460.17°C + 29.0°C
= 489.17°C
⇒Final temperature = 489.17°C