In some places, timber companies remove all the trees from entire hillsides when they are
harvesting logs, and farmers till the soil in the fall and leave the ground bare of plants until it is
time to plant in spring. What is the most likely effect of doing either of these things?
A
A. Plants will sprout better.
B. Erosion will happen faster.
C. Soil will stay cooler.
D. Decomposition will speed up.
Answers
Answer:
c
Explanation:
soil will stay cooler
Related Questions
What volume of CO2(g), measured at STP is produced if 15.2 grams of CaCO(s) is heated?
Answers
Answer:
Volume = 3.4 L
Explanation:
In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:
CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)
Now, let's calculate the number of moles in 15.2 g CaCO₃:
mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)
= \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)
= 0.1518 moles
From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.
Hence, from the formula for the number of moles of a gas, we can calculate the volume of CO₂:
mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)
⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)
⇒ Volume = 0.1518 × 22.4
= 3.4 L
Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.
what are all the ways that a substance can change state?
Answers
Explanation:
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Answer:
Matter can change from one state to another if heated or cooled. If ice (a solid) is heated it changes to water (a liquid). This change is called MELTING. If water is heated, it changes to steam (a gas).
Explanation:
Besides solubility, state two other physical properties that are different for salt and sand.
Answers
Answer:Electrical Conductivity,soluble
Explanation:
Salt is a non-magnetic solid and is soluble in water. Sand is a non-magnetic solid and is insoluble in water.
Electrical Conductivity: Salt is an electrolyte and conducts electricity when dissolved in water or in a molten state. This is because salt dissociates into ions (Na+ and Cl-) that can carry electric current. In contrast, sand is a covalent compound and does not conduct electricity, as it does not dissociate into ions in the same way as salt. Sand is considered an insulator in terms of electrical conductivity.
What is the Chinese Communist Party?
Answers
Answer:
the ruling party if The People's Republic of China
Explanation:
Known as CCP, founded in 1921
Answer:
The Communist Party of China, often referred to as the Communist Party or Party in mainland China, is the ruling party of the People's Republic of China and the second largest political party in the world. The current General Secretary of the 19th CPC Central Committee is Xi Jinping. The party was founded in the period of the Republic of China, led by Chen Duxiu and Li Dazhao. It was founded in August 1920 and called itself the Socialist Party. On July 23, 1921, the Communist Party was formally established. In 1922, it joined the Comintern to receive guidance and assistance, and cooperated with China The Kuomintang cooperated and jointly launched the National Revolutionary Movement. After the collapse of the first Kuomintang-Communist cooperation in 1927, the two parties engaged in a 10-year military struggle. Since the 1930s, the Communist Party of China has gradually shaken off the influence of the Comintern, and has been replaced by a local faction headed by Mao Zedong. Subsequently, in 1931, China's first communist regime established and ruled by the Communist Party was established.
Explanation:
draw a potentail energy diagram for a combustion reaction
Answers
Potential energy diagram for a combustion reaction:. CLICK ON IMAGE.
In a typical combustion reaction, the reactants (e.g. a fuel and an oxidizer) are initially at a relatively high potential energy. As the reaction proceeds, the potential energy of the system decreases, and the products (e.g. carbon dioxide and water vapor) are at a lower potential energy than the reactants. The difference in potential energy between the reactants and products corresponds to the heat released during the reaction.
The diagram shows the initial energy level of the reactants, the activation energy required to initiate the reaction, and the final energy level of the products. The activation energy is the minimum amount of energy required for the reaction to occur.
Once the reactants have absorbed enough energy to reach the activation energy threshold, the reaction proceeds spontaneously and releases energy as it progresses to the lower-energy products.
Note that the shape of the potential energy diagram can vary depending on the specific reaction and the reaction conditions. For example, some reactions may have more complex energy profiles with multiple intermediate steps or energy barriers.
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How many moles of nitrogen gas is 40.0 g?
Answers
Answer:
1.43 moles N₂
Explanation:
To determine the moles of nitrogen gas (N₂), you need to multiply the given value by the molar mass. The molar mass is a ratio comparing the mass (g) of nitrogen gas per 1 mole. It is important to arrange this ratio in a way that allows for the cancellation of units (grams should be in the denominator). The final answer should have 3 sig figs to match the given value.
Molar Mass (N₂): 2(14.007 g/mol)
Molar Mass (N₂): 28.014 g/mol
40.0 grams N₂ 1 mole
------------------------- x ------------------------ = 1.43 moles N₂
28.014 grams
Question 3 of 5
Which statement is a hypothesis?
A. If the temperature increases, then crickets will chirp more.
OB. Crickets are cooler than grasshoppers.
C. Does temperature affect how much crickets chirp?
OD. I hear crickets in the summer, so crickets chirp more when it's
warm outside.
SUBMIT
Answers
Answer:
A.) If the temperature increases, then crickets will chirp more.
Explanation:
The hypothesis is a testable statement that can be supported or disproved through experimentation.
A.) is correct. This statement clearly identifies what will (supposedly) happen when a variable is manipulated. Once an experiment is carried out, this hypothesis can be supported or negated.
B.) is incorrect. This is an opinion, not an objective statement. This statement is subjective and cannot be backed by evidence.
C.) is incorrect. Hypotheses are not questions. This statement also does not state how temperature could affect a cricket's chirp. However, questions can often lead to the formation of a hypothesis.
D.) is incorrect. The first part of the statement is an observation, and the second part is an assumption. Like in answer C, this information can be used as the basis in making a hypothesis.
A solution of aluminum chloride has a pH of (4.5x10^0). What is the [H3O*(aq)], in mol/L?
Note: Your answer is assumed to be reduced to the highest power possible.
Answers
The concentration of H3O+ ions in the solution of aluminum chloride is \(3.16×10^-5\) mol/L.
Aluminum chloride is an acidic salt that contains a cation, Al3+, and an anion, Cl-. When aluminum chloride is dissolved in water, it dissociates into its constituent ions, and the Al3+ cations hydrolyze to produce H+ ions.
This reaction leads to the formation of an acidic solution. The pH of a solution of aluminum chloride is \(4.5×10^0\). We need to determine the concentration of H3O+ ions in this solution.
The concentration of H3O+ ions in a solution is given by the equation: pH = -log[H3O+] where pH is the negative logarithm of the concentration of H3O+ ions in the solution. The negative sign indicates that the pH is inversely proportional to the concentration of H3O+ ions. To determine the concentration of H3O+ ions, we need to rearrange the equation:
[H3O+] = \(10^-pH\) Substituting the value of pH =\(4.5×10^0\), we get: [H3O+] = \(10^-4.5\)
The value of \(10^-4.5\) can be calculated using scientific notation: \(10^-4.5\)= \(3.16×10^-5\) mol/L
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Describe the AIR MASSES that would affect the climates of
Florida.
Maine.
Montana.
texas
Answers
The AIR MASSES that would affect the climates of Florida : are maritime tropical air mass and the maritime polar air mass,
Maine : maritime polar air mass and maritime tropical air mass,
Montana : continental polar and maritime polar air masses.
Texas : maritime tropical air masses and continental tropical air masses
What is known as AIR MASSES?An air mass is described as a large body of air with generally uniform temperature and humidity.
An air mass's properties are determined by the region from which it originates. The likelihood that the air mass will take on characteristics of the surface below increases with the amount of time it spends over its source region.
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What type of mixture is regular fog
Answers
Answer:
heterogeneous mixture.
Explanation:
Fog is heterogeneous mixture of water, air and suspension particles.
Some properties of substance X are listed. ●It conducts electricity when molten. ●It has a high melting point. ●It burns in oxygen and the product dissolves in water to give a solution with pH 11. what is X? A a covalent compound B a macromolecule C a metal D an ionic compound
Answers
An ionic compound is one that dissolves in water to produce a solution with a pH of 11, has a high melting point, conducts electricity when molten, and burns in oxygen.
What are ionic compounds, exactly?Positively charged ions, which are sometimes called as cations, and negatively charged ions, also called as anions together constitute an ionic compound, which are neutral substances. The name of the cation is written first, followed by the name of the anion, in case of binary ionic compounds (ionic compounds that only contain two types of elements).
What is the difference between covalent and ionic compounds?An atom can establish bonds with other atoms in two main ways: covalent and ionic. Sharing of electrons between two or more atoms is involved in case of covalent bonding. When two or more ions come together, they can form ionic bonds that are held together by charge differences.
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Answer Question in box below Q: What is your evidence for why you think a Fan not spinning has energy or does not have energy-explain in detail?
Answers
Answer:
Yes, a fan not spinning has energy
Explanation:
Let us remember that energy is neither created nor destroyed but is transformed from one form to another. This is known as the principle of energy conservation. Hence energy in the universe never disappears!
The fan that is not spinning has potential energy. Potential energy is energy possessed by a body by virtue of its position. When the fan starts spinning, this potential energy is converted to kinetic energy.
Which of the following conclusions can be drawn from the curves in the
energy diagram?
OA. The reaction represented by curve B will go faster than the curve A
reaction.
OB. The molecules represented in curve A have higher kinetic energy
than curve B.
C. The reaction represented by curve B has a larger equilibrium
constant than curve A.
OD. The reaction represented by curve A requires less added energy
than curve B.
SUBMIT
Answers
OD. The reaction represented by curve A requires less added energy than curve B.
Curve A represents an exothermic reaction because the products have less energy than the reactants, and curve B represents an endothermic reaction because the products have more energy than the reactants. The difference in energy between the reactants and products in curve A is less than the difference in energy between the reactants and products in curve B, which means that less energy is required to reach the transition state in curve A than in curve B. Therefore, curve A requires less added energy than curve B.
Option A is incorrect because the speed of a reaction is not determined by the shape of the energy diagram.
Option B is incorrect because the shape of the curves does not provide information about the kinetic energy of the molecules.
Option C is incorrect because the size of the equilibrium constant is not determined by the shape of the energy diagram.
A rectangular swimming pool has the dimensions of 26m long, 4m wide, and 2.5 m deep (high). The density of the water in the pool is 1.62 g/m3. What is the mass of the water in the pool? (hint: volume of a rectangle is L x w x h) Show your work!
Answers
Answer:
\(m=421.2g\)
Explanation:
Hello.
In this case, we first compute the volume of the pool via:
\(V=L*W*H\\\\V=26m*4m*2.5m\\\\V=260m^3\)
Then, since the density is defined as the mass divided by the volume, we compute the mass as follows:
\(\rho=\frac{m}{V}\\ \\m=\rho*V\\\\m=1.62g/m^3*260m^3\\\\m=421.2g\)
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Is anyone good at chemistry if so can someone help me please ?
(NO LINKS)
Answers
This requires familiarity with the different theories (or concepts) of acids and bases.
On the Arrhenius concept, an acid is a substance that produces an H⁺ ion in water such that the H⁺ concentration increases, and a base is a substance that produces an OH⁻ ion in water such that the OH⁻ concentration increases.
On the Brønsted–Lowry concept, an acid is a substance that donates a proton (which is basically an H⁺ ion) in a solvent, and a base is a substance that accepts a proton in a solvent.
On the Lewis concept, an acid is a substance that accepts an electron pair in a solvent, and a base is a substance that donates an electron pair in a solvent.
The concepts become progressively broader, i.e., the Arrhenius concept is the most restrictive and the Lewis concept is the least restrictive. As a corollary, an Arrhenius acid or base is also both a Brønsted–Lowry acid or base and a Lewis acid or base, respectively; a Brønsted–Lowry acid or base is not necessarily an Arrhenius acid or base, but an Arrhenius acid or base is also a Lewis acid or base, respectively. And finally, a Lewis acid or base may not necessarily be either an Arrhenius or a Brønsted–Lowry acid or base.
So, with the above concepts in mind, we can match the statements in column A with the type of acid or base in column B:
\(\begin{center}\begin{tabular}{ c c } 1 & Bronsted Lowry acid \\ 2 & Bronsted Lowry base \\ 3 & Arrhenius acid \\ 4 & Arrhenius base \\ 5 & Lewis base \\ 6 & Lewis acid\end{tabular}\end{center}\)
The gas phase reaction of H2 with CO2 To produce H2O and CO has…
(Refer to the image, please)
Answers
The given reaction has ΔG value -12207KJ. Therefore, the given reaction is a spontaneous reaction as value of ΔG is negative.
A spontaneous process refers to anything that happens by itself, without external energy input. A ball is going to roll down an incline, water will flow downhill, ice will melt into water, radioactive elements will decay, and iron will rust, for instance. It is impossible for a reaction to not be spontaneous if it is exothermic (H negative) and increases the entropy for the system (S positive). The system's overall heat capacity is measured in enthalpy. The system's unpredictability is gauged by entropy.
ΔG=ΔH-T×ΔS
ΔG=11-298×41
= -12207KJ
Since ΔG is negative, reaction is spontaneous
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Determine whether the following five molecules are polar or nonpolar and explain your answer:
a) Beryllium chloride b) Hydrogen sulphide c) Sulphur trioxide d) Water e) Trichloromethane
Answers
The following are categorized into polar or nonpolar molecules:
a) Beryllium chloride - nonpolar b) Hydrogen sulphide - polar c) Sulphur trioxide - nonpolar d) Water - polar e) Trichloromethane - polar How to determine polar or nonpolar?a) Beryllium chloride (BeCl₂) is a nonpolar molecule. The Be-Cl bond is polar due to the electronegativity difference between beryllium and chlorine, but the molecule is linear with the two polar bonds pointing in opposite directions, resulting in a net dipole moment of zero.
b) Hydrogen sulphide (H₂S) is a polar molecule. The H-S bond is polar due to the electronegativity difference between hydrogen and sulfur, and the molecule has a bent shape, resulting in a net dipole moment that is not zero.
c) Sulphur trioxide (SO₃) is a nonpolar molecule. The S-O bonds are polar due to the electronegativity difference between sulfur and oxygen, but the molecule is trigonal planar with the three polar bonds pointing in different directions, resulting in a net dipole moment of zero.
d) Water (H₂O) is a polar molecule. The H-O bond is polar due to the electronegativity difference between hydrogen and oxygen, and the molecule has a bent shape, resulting in a net dipole moment that is not zero.
e) Trichloromethane (CHCl₃) is a polar molecule. The C-Cl bonds are polar due to the electronegativity difference between carbon and chlorine, and the molecule has a tetrahedral shape, resulting in a net dipole moment that is not zero.
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Can you help me solve number 3 ? Thank you
Answers
Trend of atomic number and atomic size of the elements when we move from left to right in different periods of periodic table
Answers
Answer:
The atomic size decreases with an increase in atomic number when we move from left to right.
Explanation: Hope it helps you:))))))
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ANSWER THE LINK PLEASEEEEE FASTTTT
Answers
1) NaCl is unaffected by temperature
2) KNO3 is most affected by the temperature of water
3) SO2 dissolves the most at 15 degrees
What is the solubility curve?A graph illustrating the solubility of a solute in a solvent as a function of temperature and constant pressure is called a solubility curve.
It is typically shown as a line graph with the y-axis showing the quantity of solute that may dissolve in the solvent at that temperature, typically in grams of solute per 100 grams of solvent. The x-axis represents temperature.
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Predict the most likely bond type for the following.
a. Cu (Copper)
b. KCl (Potassium Chloride)
c. Si (Silicon)
d. CdTe (Cadmium Telluride)
e. ZnTe (Zinc Telluride)
Answers
Answer:
The three major types of bond are ionic, polar covalent, and covalent bonds. Ionic occurs majorly between metals and non-metals, which allows sharing of electrons to form an ionic compound. Whereas covalent bonding calls for complete transfer of electrons between atoms. Polar covalent bonds have unequaly shared electron-pair between two atoms.
Explanation:
a. Cu (Copper)- ionic bonding
b. KCl (Potassium Chloride) - ionic bonding
c. Si (Silicon) - covalent bonding
d. CdTe (Cadmium Telluride) - polar covalent bonding
e. ZnTe (Zinc Telluride)- polar covalent bonding
1. During an investigation, a student measured the amount of space various objects take up. Which property of matter was the student investigating?
volume
mass
weight
density
Answers
Which substance is a binary acid?
hydrochloric acid
phosphoric acid
nitrous acid
sulfuric acid
Answers
Answer:
hydrochloric acid
Explanation:
done this before
Answer:
Hydrochloric acid
Explanation:
Binary acids or Hydracids are certain molecular compounds in which hydrogen is combined with a second nonmetallic element.
Plz help me!! Let it be a good amount of presentation.
Create a presentation that explains how an effective speaker and an active listener interact. Use your imagination to show how speaking and listening skills work together to produce good communication.
Answers
Answer:
Read the article on Mine Tools called "Active Listening"
Explanation:
Ive used it before for assignments. Its pretty informative and only takes like 10 minutes to read
Identify the movements of the glenohumeral joint that occur with contraction of the infraspinatus and teres minor.
Answers
Answer: adduction of the arm
lateral rotation of the arm
Explanation:
CHEM FINAL TOMORROW!!! I'm struggling with a few concepts, if anyone could help explain this to me & how to do it, I'd be very grateful!!!
Answers
Based on the given reaction, the acid-base pairs in this reaction are:
HCO₃⁻ (acid) and NH₃ (base)NH₄⁺ (acid) and CO₃²⁻ (base)What are the acid-base pairs in the given reaction?An acid-base pair refers to a set of two chemical species that are related through the transfer of a proton (H+ ion) during a chemical reaction.
One species acts as an acid by donating a proton, while the other acts as a base by accepting that proton.
In the given reaction:
HCO₃⁻ (aq) + NH₃ (aq) → NH₄⁺ + CO₃²⁻
An acid-base pair can be identified as follows:
HCO₃⁻ (bicarbonate ion) can act as an acid by donating a proton (H⁺), becoming CO₃⁻.
NH₃ (ammonia) can act as a base by accepting a proton (H⁺), becoming NH₄⁺ (ammonium ion).
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A balanced chemical equation has equal numbers of atoms of each type on both sides of the equation. This illustrates the principle of
Answers
Answer:
conservation of mass
Which of these is not used to make models of interstellar medium?
Material from meteorites.
Minerals.
Synthetic materials.
Burnt wood ash.
Answers
Material from meteorites are not the elements used to make models of interstellar medium. The correct option is A.
What is interstellar medium?The matter and radiation that prevail in the space between star systems in a galaxy are referred to as the interstellar medium in astronomy. This matter consists of gas including ionic, atomic, and molecular, dust, and cosmic rays.
Meteorite material is not used to create models of the interstellar medium.
Thus, the correct option is A.
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What is the molar mass of a gas if 9.53 g is present in a 17.1 L container at the conditions of 20.3 kPa and 95.2oC?
(Answer) g/mol (3 SF)
Answers
Answer:
M = 0.0821 * P * V * W / T
Explanation:
Predict the products of the following reaction. If no reaction will occur, use the NO REACTION button.
Be sure your chemical equation is balanced!
Li(s)+H2O(l) --->
Answers
Answer:
2Li(s) + 2H2O(l) => 2LiOH(aq) + H2(g)
Explanation:
The balanced equation is :
2Li(s) + 2H2O(l) => 2LiOH(aq) + H2(g)
Li : 2
H: 4
O: 2