Answer:
It is erosion
Explanation:
Ecological succession, the process by which the structure of a biological community evolves over time.
What is meant by ecological succession?Ecological succession is the process by which the mix of species and habitat in an area changes over time. Gradually, these communities replace one another until a climax community like a mature forest is reached, or until a disturbance, like a fire, occurs. Ecological succession is a fundamental concept in ecology.
Why does ecological succession occur?Ecological succession occurs due to the changes in the physical environment and population of species. It may also occur when the conditions of an environment suddenly and drastically change. For example, forest fires, wind storms, and human activities all greatly alter the conditions of an environment.
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What is the name of this molecule? A. 4-hexyne B. 2-hexyne C. 3-hexyne D. 1-hexyne
Answer:
3 hexyne
Explanation:
The correct name of the compound can be written by the IUPAC system as 3-hexyne.
What is IUPAC nomenclature?IUPAC is the acronymn for the international Union of Pure and Applied Chemisty. This body is responsible for devising the conventions of namiong compounds such that the name of the compound could be deduced from its structure.
In this case, the correct name of the compound can be written by the IUPAC system as 3-hexyne.
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21. Which type of reaction is shown below?
BaCl2(aq) + K2CO3(aq) → BaCO3(s) + 2 KCl(aq)
A)Decomposition
B)Double replacement
C)Single replacement
D)Combustion
To solve such this we must know the concept of double displacement reaction. The correct option is option B that is double displacement reaction.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
In double displacement reaction the two compounds react with each other. The cations of each compound exchange their places with ne another. Ba²⁺ of BaCl[tex]_2[/tex] is displacing K⁺ ion from the compound K[tex]_2[/tex]CO[tex]_3[/tex].
Therefore the correct option is option B that is double displacement reaction.
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Given the reaction below, which is the oxidized substance?
Mg + Cl2—>Mg2+ + 2C1-
A)2014
B)Cl2
C)Mg
D)Mg2+
Answer:
Mg ²⁺
Explanation:
Τhe metal loses electrons and in forming Mg²⁺ ,it loses 2 electrons and hence oxidized.
Mg(s) ⇒ Mg²⁺ + 2e⁻
The metal loses electrons, and when it becomes Mg2+, it loses two electrons, becoming oxidized. So, the correct option is D.
What is Oxidation reaction?Initially, the word "oxidation" was used to refer to chemical processes in which a component reacts with oxygen. An illustration of this is the oxidation of magnesium in the formation of magnesium oxide when magnesium and oxygen react.
Antoine Lavoisier used the term "oxidation" to describe the reaction of a material with oxygen. The meaning was later expanded to cover additional reactions in which electron are lost, irrespective of whether oxygen was present, after it was realised that the substance loses electrons when it is oxidised.
In the aforementioned example, the metal loses electrons; specifically, it loses two electrons as it changes from Mg+ to Mg2+, getting oxidized.
Therefore, the correct option is D
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Which of these is an example of an engineering solution?
O
A. Studying the diets of people with autoimmune diseases.
B. Creating a biodegradable trash bag.
C. Figuring out how long it takes plastic to degrade in a landfill.
D. Studying new species of insects in the Costa Rican jungles.
ASAP!!!
Answer:
B. Creating a biodegradable trash bag.
Explanation:
Engineering is generally defined as the use of scientific principles to design or build structures such as buildings, bridges and vehicles.
Engineering is the application of science or math to solve our daily life problems. So, creating a biodegradable trash bag is an example of an engineering solution which solve the environmental-related issues.
Hence, the correct option is B.
Determine the name for P4010.
Answer:
Technically, the name for P4o10 is Tetraphosphorus Decaoxide, but most people call it Phosphorus Pentoxide
Explanation:
Tetraphosphorus Decaoxide is a chemical compound. The molecular formula for this compound is P4o10. But, under normal conditions, it is actually a dimer of P205, which is Phosphorus (V) Oxide, or Phosphorus Pentoxide.
To solve this we must be knowing each and every concept related to chemical compound. Therefore, the name for P[tex]_4[/tex]O[tex]_{10}[/tex]. is Tetra phosphorus Deca oxide.
What is chemical compound?A chemical substance was made up of numerous comparable molecules that are made up of atoms from multiple elements that are held together through chemical bonds. Compounds are classified into four types based on the way the component elements are kept together.
A chemical formula is a method of communicating information about the atom components that make up a specific chemical compound, using conventional acronyms again for chemical elements and subscripts to express the atomic mass involved. The name for P[tex]_4[/tex]O[tex]_{10}[/tex]. is Tetra phosphorus Deca oxide.
Therefore, the name for P[tex]_4[/tex]O[tex]_{10}[/tex]. is Tetra phosphorus Deca oxide.
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18. How are ionic compounds formed?
A)Atoms share electrons.
B)Elements change into different elements.
C)Atoms gain/lose electrons and are held together by electrostatic forces.
D)Atoms share protons.
Answer:
C
Explanation:
Ionic compounds consist of ions, which are formed when elements gain or lose electrons through donating or receiving.
Ionic compounds are formed by atoms that gain/lose electrons and are held together by electrostatic forces. The correct option is C).
What are ionic compounds?Ions are charged particles that occur when an atom (or group of atoms) receives or loses electrons. Ionic compounds are substances made of ions. (A positively charged ion is a cation, whereas a negatively charged ion is an anion.)
When elements share electrons in a covalent connection to create molecules, they produce covalent or molecular compounds.
Chemical compounds include ionic compounds. They were held together by the ionic chemicals from which they were produced.
A marginally soluble ionic substance loses some of its solubility when a common ion is added to a solution because: Reaction to the ionization process known as the common ion effect
Therefore, the correct option is C) Atoms gain/lose electrons and are held together by electrostatic forces.
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What are crystalline solids?
A. Solids with heterogeneous organization
B. Solids with a repeating atomic pattern
O C. Solids with a random atomic structure
D. Solids that break apart in jagged pieces
To solve this we must be knowing each and every concept related to crystalline solids. Therefore, crystalline solids are the solids with a repeating atomic pattern. the correct option is option B.
What is crystalline solids?One form of solid-state material is crystalline solids. Solids are substances with a melting point higher than ambient temperature at atmosphere pressure. Solids are classified into two categories based just on arrangement of their constituents: amorphous solids and crystalline solids.
Crystalline solids are solids with a regular but three-dimensional arrangement of component units including such (atoms, molecules, or ions). Crystalline solids are the solids with a repeating atomic pattern.
Therefore, crystalline solids are the solids with a repeating atomic pattern. the correct option is option B.
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Complete and balance HBr(aq)+NaHCO3(aq)→
Answer:
NaHCO3(aq) + HBr(aq) = CO2(g) + H2O(l) + NaBr(aq)
Explanation:
I think it's a doubel replacement.
What does the first law of thermodynamics say?
A. Energy cannot be stored in any form.
B. Energy cannot be created or destroyed.
C. Energy cannot move within a system.
D. Energy cannot enter or leave a system,
Answer:
B. Energy cannot be created or destroyed.Explanation:
The first Law of Thermodynamics (Law of Conservation of Energy ) :
energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another.
scientist cant look inside an atom So how did they discover sub-atomic particles
Answer:
Subatomic particles are found inside the atom
What are the coeffients that balance the following skeletal equation?
CH4 + O2 + Cl2 ® HCI + CO
Answer:
CH4 ---> 2
CL2 ----> 4
HCL -----> 8
CO-------> 2
Explanation:
Equation
CH4 + O2 + Cl2 => HCI + CO
we have to balance it
On LHS atoms of oxygen is 2 while on RHS it is 1 atom so lets balance oxygen first
to balance oxygen on RHS we add 2 as coefficient to CO
CH4 + O2 + Cl2 => HCI + 2CO
___________________________________________________
On RHS atoms of Carbon is 2 while on RHS it is 1 atom so lets balance Carbon now
to balance Carbon on LHS we add 2 as coefficient to CH4
2CH4 + O2 + Cl2 => HCI + 2CO
___________________________________
On LHS atoms of hydrogen is 8 so lets balance hydrogen now
to balance hydrogen on RHS we add 8 as coefficient to HCL
2CH4 + O2 + Cl2 => 8HCI + 2CO
______________________________________________
On RHS atoms of Cl is 8 while on LHS atoms of Cl is 2.
To make no of atoms of Cl 8 on LHS we add 4 as coefficient
2CH4 + O2 + 4Cl2 => 8HCI + 2CO
Thus, coefficients are as given below
CH4 ---> 2
CL2 ----> 4
HCL -----> 8
CO-------> 2
If a reaction taking place in a flask shows a drop in temperature, which type of reaction is it? Options: exothermic reactions endothermic reactions
Answer:
exothermic reaction
Explanation:
If there is a drop in temperature, then energy was lost to the surroundings because temperature is the average measure of kinetic energy. An exothermic reaction would result in this lost of energy. An endothermic reaction would absorb energy and make the temperature rise.
Answer:
Endothermic
Explanation:
Exothermic means giving out of energy/heat and the taking in of energy/heat means endothermic reaction.
3. How does this difference in language relate to our propensity to save?
Answer:
If you speak a futureless language, you will speak about time identically meaning you will feel as they are identical, it increases your propensity to save.
Explanation:
hope this helps you :)
Answer:If you speak a futureless language, you will speak about time identically meaning you will feel as they are identical, it increases your propensity to save.
Explanation:
Thats it
What does the frequency of a wave refer to?
O A. The number of waves that pass a point in 1 second
O B. The velocity of the wave in meters per second
O c. The height of the wave from top to bottom
O D. The distance between two peaks in the wave
The number of waves that pass a point in 1 second is the frequency of a wave. Therefore, the correct option is option A.
What is frequency of a wave?The frequency of a repeated event is its number of instances per unit time. It differs from angular frequency and is sometimes referred to anyone as temporal frequency greater clarification. The unit of frequency is hertz (Hz), or one occurrence per second. The time elapsed between events is measured by the period, which corresponds to the reciprocal of a frequency.
For instance, the period, T—the time between —is equal to half a second if a heart 120 times per minute. The frequency of oscillatory or events, such as mechanical motion and waves, is a crucial characteristic in science and engineering. The number of waves that pass a point in 1 second is the frequency of a wave.
Therefore, the correct option is option A.
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Write the equilibrium expression for the following reaction. Based upon the value of K, would you expect more or less product to be in the equilibrium mixture? Why?
Answer:
1. K = [CaCO3] [H2]⁴/ [CaO] [CH4] [H2O]²
2. More products are obtained at equilibrium since the equilibrium constant is very large.
Explanation:
1. Determination of the expression for the equilibrium constant, K.
The equilibrium constant, K for a given reaction is simply the ratio of concentration of the products raised to their coefficient to the concentration of the reactants raised to the coefficient.
The balanced equation for the reaction is given below:
CaO(s) + CH4(g) + 2H2O(g) —> CaCO3(s) + 4H2(g)
Therefore, the equilibrium constant, K for the above equation is:
K = [CaCO3] [H2]⁴/ [CaO] [CH4] [H2O]²
2. From the question given, the equilibrium constant is 2344.
Since the equilibrium constant is very large, it therefore means that more product are obtained at equilibrium.
Does a precipitate form when a solution of calcium chloride and a solution of mercury(I) nitrate are mixed together? Write the net ionic equation.
Answer : Yes, a precipitate form when a solution of calcium chloride and a solution of mercury(I) nitrate are mixed together.
The net ionic equation will be,
[tex]2Hg^{+}(aq)+2Cl^{-}(aq)\rightarrow Hg_2Cl_2(s)[/tex]
Explanation :
In the net ionic equations, we are not include the spectator ions in the equations.
Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.
The given balanced ionic equation will be,
[tex]CaCl_2(aq)+2HgNO_3(aq)\rightarrow Ca(NO_3)_2(aq)+Hg_2Cl_2(s)[/tex]
The ionic equation in separated aqueous solution will be,
[tex]Ca^{2+}(aq)+2Cl^{-}(aq)+2Hg^{+}(aq)+2NO_3^{-}(aq)\rightarrow Hg_2Cl_2(s)+Ca^{2+}(aq)+2NO_3^{-}(aq)[/tex]
In this equation, [tex]Ca^{2+}\text{ and }NO_3^-[/tex] are the spectator ions.
By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.
The net ionic equation will be,
[tex]2Hg^{+}(aq)+2Cl^{-}(aq)\rightarrow Hg_2Cl_2(s)[/tex]
Taking into account the definition of net ionic equation, a precipitate of Hg₂Cl₂ is formed when a calcium chloride solution and a mercury (I) nitrate solution are mixed.
The net ionic equation is a chemical equation for a reaction that lists only the species that participate in the reaction.
In other words, an ionic equation is a chemical equation where electrolytes in aqueous solution are written as dissociated ions. Usually this is a salt dissolved in water, where the ionic species are followed by (aq) in the equation, to indicate that they are in aqueous solution.
The balanced equation will be:
CaCl₂(aq) + 2 HgNO₃(aq) → Ca(NO₃)₂(aq) + Hg₂Cl₂(s)
where (aq) means aqueous and (s) solid.
Taking into account that:
All Cl⁻, Br⁻ and I⁻ salts are soluble. All salts of NO₃⁻, C₂H₃O₂⁻, ClO₃⁻ and ClO₄⁻ are soluble.The total ionic equation in separated aqueous solution will be:
Ca²⁺(aq) + 2Cl⁻(aq) + 2 Hg⁺(aq) + 2NO₃⁻(aq) → Ca²⁺ + 2NO₃⁻(aq) + Hg₂Cl₂(s)
A spectator ion is an ion that appears both as a reactant and as a product in an ionic equation.
Spectator ions can be either cations (positively charged ions) or anions (negatively charged ions).
When writing a net ionic equation, spectator ions found in the original equation are ignored. Thus, the total ionic reaction is different from the net chemical reaction.
In this case, Ca²⁺ and NO₃⁻ are the spectator ions because they appear unchanged in both the product and the reagent. So these ions cancel out by writing the net ionic equation and you get:
2Cl⁻(aq) + 2 Hg⁺(aq) → Hg₂Cl₂(s)
Since Hg₂Cl₂ is an insoluble salt, it will precipitate.
Finally, a precipitate of Hg₂Cl₂ is formed when a calcium chloride solution and a mercury (I) nitrate solution are mixed.
Learn more:
https://brainly.com/question/18896765?referrer=searchResultshttps://brainly.com/question/10553963?referrer=searchResultshttps://brainly.com/question/7018960https://brainly.com/question/24099019?referrer=searchResultshttps://brainly.com/question/10538922?referrer=searchResultsWhich best describes the relationship between heat, internal energy, and thermal energy?
O Internal energy is heat that flows, and heat is the part of thermal energy that can be transferred.
Internal energy is thermal energy that flows, and thermal energy is the part of heat that can be transferred.
O Thermal energy is heat that flows, and heat is the part of internal energy that can be transferred.
O Heat is thermal energy that flows, and thermal energy is the part of internal energy that can be transferred.
Answer:
D) Heat is thermal energy that flow, and thermal energy is the part of internal energy that can be transformed.
Enthalpy of a molecule is the internal energy of a molecule. It can be due to translational motion, rotational motion, vibrionic motion or electronic motion. Therefore the correct option is option D
What is Enthalpy?Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Enthalpy is directly proportional to specific heat capacity of a substances
Mathematically,
Enthalpy=mass of metal× specific heat capacity of metal× Change in temperature.
Enthalpy of a reaction can be calculated by substracting the total energy of reactant from the total energy of the product
Heat is thermal energy that flows, and thermal energy is the part of internal energy that can be transferred. Energy can neither be created nor be destroyed
Therefore the correct option is option D
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Consider the reaction 2AI(OH)3 + 3H2SO4 Right arrow. X + 6Y. What are X and Y? X = AI2(SO4)3; Y = H2O X = AI2(SO4)3; Y = H2 X = AI2(SO3)3; Y = H2O X = AI2(SO3)3; Y = H2
Answer :
X = [tex]Al_2(SO_4)_3[/tex]
Y = [tex]H_2O[/tex]
Explanation :
Balanced chemical equation : It is defined as the equation in which total number of individual atoms on the reactant side is equal to the total number of individual atoms on product side.
The given chemical equation is:
[tex]2Al(OH)_3+3H_2SO_4\rightarrow X+6Y[/tex]
As we know that when aluminum hydroxide react with sulfuric acid then it gives aluminum sulfate and water as product.
The balanced chemical reaction will be:
[tex]2Al(OH)_3+3H_2SO_4\rightarrow Al_2(SO_4)_3+6H_2O[/tex]
Thus, X is [tex]Al_2(SO_4)_3[/tex] and Y is [tex]H_2O[/tex]
Answer:
a
Explanation:
What is an alloy? A. A substitution of one metal for another metal B. A metal with a changed oxidation state C. A combination of metal with another element D. A layering of one metal over another metal
The correct answer is the combination of a metal with another element.
An alloy is a combination of two or more metallic elements to make a stronger material. For instance, there are bronze alloys, brass alloys, and coin alloys.
We can confirm that an alloy is a combination of one metal with another metal because stainless steel is made of an iron and chromium alloy (iron is a metal; chromium is also a metal). Therefore, we can confirm that option C is the best choice.
HELP ASAP! PLEASE PLEASE PLEASE Suppose a reaction begins with 54 molecules of B2 and 126 molecules of A2 which react as completely as possible according to the equation B2 + 3 A2 --> 2 BA3. How many B2 molecules will be present in the container at the end of the reaction?
Answer:
Explanation:
For one B2 molecule 3 A2 molecules are reacting means,
the ratio is 1:3
Out of 126 molecule = 126/3 =42 molecules are required for the reaction,
therefore the 54-42= 10 molcules of B2 will reamin in the end of reaction.
What is the correct answers
Answer:
B, C, D
Explanation:
Polyatomic ions are ions that have more than 1 atom.
What is the percent of nitrogen in dinitrogen pentoxide?
A 74.1
B 62.8
C 44.4
D 25.9
Answer: D.) 25.9%
Explanation:
Dinitrogen pentoxide chemical formular : N2O5
Calculating the molar mass of N2O5
Atomic mass of nitrogen(N) = 14
Atomic mass of oxygen(O) = 16
Therefore molar mass :
N2O5 = (2 × 14) + (5 × 16) = 28 + 80 = 108g/mol
Percentage amount of elements in N205:
NITROGEN (N) :
(Mass of nitrogen / molar mass of N2O5) × 100%
MASS OF NITROGEN = (N2) = 2 × 14 = 28
PERCENT OF NITROGEN : (28/108) × 100%
0.259259 × 100%
= 25.925%
= 25.9%
7. Do you have any reservations about taking this course? Explain. How can I help?
I dont understand what it means by reservations
please help I just started this and I'm already stressed out
Answer:
Reservations means to say, are there any thoughts you have about this course that are negative. And what can your teacher do to help you excel, or succeed in this course. Good luck to you, and remember to take deep breathes when you need a break.
Explanation:
Question 25———-A, YA are two isotopes of element A.
Difference between the number of neutrons
in the isotopes is?
Answer:
Option C. 1
Explanation:
Step 1:
Determination of the Neutron of both isotopes. This is illustrated below.
For isotope y xA:
Mass number = y
Atomic number = x
Neutron =..?
Atomic number = proton number = x
Mass number = Proton + Neutron
y = x + Neutron
Rearrange
Neutron = y – x
For isotope (y + 1) xA:
Mass number = y + 1
Atomic number = x
Neutron =.?
Atomic number = proton number = x
Mass number = Proton + Neutron
y + 1 = x + Neutron
Rearrange
Neutron = y + 1 – x
Step 2:
Determination of the difference between the neutron number of both isotopes. This is illustrated below:
For isotope y xA:
Neutron number = y – x
For isotope (y + 1) xA:
Neutron number = y + 1 – x
Difference in neutron number
=> (y + 1 – x) – (y – x)
=> y + 1 – x – y + x
Rearrange
=> y – y + 1 – x + x
=> 1
Therefore, the difference in the neutron number of both isotopes is 1
Write the formula of the ion formed when Aluminum reacts by losing electrons
Answer:
If alluminium loses 1 electron Al+
If it loses 2 electrons Al++
Explanation:
What is chromatography used for? Select all that apply. ]
dissolving substances
separating liquids in a mixture
crystallizing substances
separating gases in a mixture
Answer:
Separating liquids in a mixture
Separating gases in a mixture
Explanation:
Chromatography is the separation of a mixture by passing it in solution or gas through a medium where the components move at different rates.
Answer:
separating liquids in a mixture
separating gases in a mixture
Explanation:
What energy transfer is occurring when you make a call on a phone?
A. electrical to chemical
B. heat to sound
C. electrical to sound
D. chemical to light
Reset Selection
You have left the carton of milk out of the refrigerator overnight and it has
spoiled. This is an example of a
A. Physical property
O
B. Physical change
OC. Chemical property
D. Chemical change
Reset Selection
Answer:
D: chemical change
Explanation:
If “light A” has a longer wavelength than "light B”, then “light A” has
“light B”.
Answer: light A has less energy than light B
Explanation: The longer wavelength the less energy. The shorter wavelength the more energy.
4. Which of the following statements correctly describe atoms? Select all that apply.
A)Atoms have mass,
B)Atoms are the basic unit of a chemical element.
C)Matter is made of atoms.
D)Atoms take up space.
Answer:
all of the above
Explanation:
adams take up space they take up mass they are the basic chemical unit and matter is made of adams
Answer:
All of them except "Elements are the basic unit of atoms."
Explanation:
I took the quiz :D