Answer:
Precipitation reactions occur when cations and anions in aqueous solution combine to form an insoluble ionic solid called a precipitate. Whether or not such a reaction occurs can be determined by using the solubility rules for common ionic solids.
Explanation:
Given the standard enthalpy changes for the following two reactions
Given the standard enthalpy changes for the following two reactions:
(1) 2C(s) + 2H2(g)C2H4(g)...... ΔH° = 52.3 kJ
(2) 2C(s) + 3H2(g)C2H6(g)......ΔH° = -84.7 kJ
what is the standard enthalpy change for the reaction:
(3) C2H4(g) + H2(g)C2H6(g)......ΔH° = ?
The standard enthalpy change for reaction (3) is 117.1 kJ.
The standard enthalpy change for reaction (3) can be calculated by using the enthalpy changes of reactions (1) and (2) and applying Hess's Law.
To do this, we need to manipulate the given equations so that the desired reaction (3) can be obtained.
First, we reverse reaction (1) to get the formation of C2H4(g) from C2H6(g):
C2H4(g)C2H6(g) ΔH° = -52.3 kJ
Next, we multiply reaction (2) by 2 and reverse it to obtain 2 moles of C2H6(g) reacting to form 3 moles of H2(g):
2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ
Now, we add the two modified equations together:
C2H4(g)C2H6(g) ΔH° = -52.3 kJ
2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ
When adding these equations, the C2H6(g) on the left side cancels out with the C2H6(g) on the right side, leaving us with the desired reaction (3):
C2H4(g) + H2(g)C2H6(g) ΔH° = -52.3 kJ + 169.4 kJ = 117.1 kJ
Learn more about standard enthalpy here :-
https://brainly.com/question/28303513
#SPJ11
3H2(g)+N2(g)——> 2NH3(g)
What volume of NH3(g) measured at STP is produced when 2.15 L of H2(g) reacts?
3H₂(g)+N₂(g)——> 2NH₃ (g) , here the volume of NH₃(g) measured at STP is produced when 2.15 L of H₂(g) reacts is approximately 1.58 L of NH₃ gas will be produced when 2.15 L of H₂ reacts at STP.
3H₂(g) + N₂(g) → 2NH₃ (g)
3 moles of H₂ reacts to produce 2 moles of NH3. Therefore, one need to first calculate the number of moles of H₂ in 2.15 L.
PV = nRT
P= is the pressure (STP has a pressure of 1 atm), V =is the volume in liters, n is the number of moles, R= is the ideal gas constant (0.0821 L·atm/mol·K), T =is the temperature in Kelvin (STP has a temperature of 273 K).
Here,
n(H₂) = (P(H₂) × V(H₂)) / (R × T)
Assuming the pressure of H₂ is also 1 atm at STP, and substituting the values:
n(H₂) = (1 atm × 2.15 L) / (0.0821 L·atm/mol·K × 273 K) n(H₂) ≈ 0.0954 mol
According to the balanced equation, 3 moles of H₂ react to produce 2 moles of NH3. Therefore, one can determine the number of moles of NH₃ produced:
n(NH₃ ) = (2/3) × n(H₂) n(NH₃ )
≈ (2/3) × 0.0954 mol n(NH₃ )
≈ 0.0636 mol
V(NH₃ ) = (n(NH₃ × R × T) / P(STP)
Substituting the values:
V(NH₃ ) = (0.0636 mol × 0.0821 L·atm/mol·K × 273 K) / (1 atm) V(NH₃ )
≈ 1.58 L
Learn more about this calculation here
https://brainly.com/question/31242909
#SPJ1
If a car travels 600m in 40 seconds how fast is it going?
Answer:
S = d/t s = 400m/ 20 sec = 20m/s
Explanation:
calcium sulfite decomposes when heated to form calcium oxide and sulfur dioxide. how many grams of sulfur dioxide is produced from 3 moles of calcium sulfite?
calcium sulfite decomposes when heated to form calcium oxide and sulfur dioxide. This involves a Decomposition Reaction. 192.19 gram of sulfur dioxide is produced from 3 moles of calcium sulfite.
Sulfite is the name given to the SO32− anion. So the reactant is composed of calcium cations, Ca 2+ and sulfite anions, SO 32−. Since calcium cations have a 2+ charge, and oxygen anions have a 2− charge, & calcium oxide will simply be
Ca2 + O2− ⇒ Ca2O2 ⇒ Ca O
Sulphur dioxide is a covalent compound. it contains one sulphur atom. Sulphur has no prefix in the name of the compound two oxygen atoms oxygen has a di- prefix in the name of the compound. Therefore, you can say that sulfur dioxide is SO2.
This gives Ca SO3 (s] → Ca O (s] +SO 2(g]↑.
sulfur dioxide is produced from 3 moles of calcium sulfite.
so, 3 mole of CaSO3 * 1 mole of SO2 / 1 mole of Ca SO3
= 3 mole of SO2 = 192.19 grams of SO2
To learn more about Decomposition Reaction please visit:
https://brainly.com/question/21491586
#SPJ4
6.58 grams of sulfur trioxide and 16.4 grams of water react to form H2SO4. identify the limiting reagent and the excess. how many grams of the excess is left over .
what mass of sulfuric acid is produced?
1. The limiting reagent is sulfur trioxide, SO₃ and the excess reagent is water, H₂O
2. The mass of the excess reagent leftover is 14.92 g
3. The mass of sulfuric acid, H₂SO₄ is produced is 8.06 g
1. How do i determine the limiting and the excess reagent?The limiting and excess reagent can be obtained as follow:
SO₃ + H₂O -> H₂SO₄
Molar mass of SO₃ = 80 g/molMass of SO₃ from the balanced equation = 1 × 80 = 80 g Molar mass of H₂O = 18 g/molMass of H₂O from the balanced equation = 1 × 18 = 18 gFrom the balanced equation above,
80 g of SO₃ reacted with 18 g of H₂O
Therefore,
6.58 g of SO₃ will react with = (6.58 × 18) / 80 = 1.48 g of H₂O
From the above calculation, we can see that only 1.48 g of H₂O out of 16.4 g is needed to react completely with 6.58 g SO₃.
Thus, the limiting reagent is SO₃ and the excess reagent is H₂O
2. How do i determine the mass of the excess reagent leftover?The mass of the excess reagent leftover can be obtained as follow:
Mass of excess reagent, H₂O given = 16.4 gMass of excess reagent, H₂O that reacted = 1.48 gMass of excess reagent, H₂O leftover =?Mass of excess reagent, H₂O leftover = Mass given - mass reacted
Mass of excess reagent, H₂O leftover = 16.4 - 1.48
Mass of excess reagent, H₂O leftover = 14.92 g
3. How do i determine the mass of H₂SO₄ produced?The mass of H₂SO₄ produced can be obtained as illustrated below:
SO₃ + H₂O -> H₂SO₄
Molar mass of SO₃ = 80 g/molMass of SO₃ from the balanced equation = 1 × 80 = 80 g Molar mass of H₂SO₄ = 98 g/molMass of H₂SO₄ from the balanced equation = 1 × 98 = 98 gFrom the balanced equation above,
80 g of SO₃ reacted to produce 98 g of H₂SO₄
Therefore,
6.58 g of SO₃ will react to produce = (6.58 × 98) / 80 = 8.06 g of H₂SO₄
Thus, the mass of H₂SO₄ produced is 8.06 g
Learn more about mass produced:
https://brainly.com/question/9526265
#SPJ1
In order for a substance to be considered a mineral, it must a. be a solid, liquid, or gas. b. be abundant in the crust. c. have atoms arranged in a random, non-repeating pattern. d. contain carbon.
Answer: i think its (b) be abundant in the crust
Explanation:
Which of the compounds below will dissociate in water? Check all that apply.
A.) Ba(NO3)2
B.) CaSO4
C.) CO2
D.) H2CO3
E.) Mg3(PO4)2
Answer: The answers are A, B, and E.
Explanation: Got it wrong on Edge and that's what it showed.
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, the correct option are option A,B,D,E.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.
The compound that is ionic in nature can be dissociated very easily in water. Since ionic compounds are polar in nature, they readily dissolve in water. among given option Ba(NO\(_3\))\(_2\), CaSO\(_4\), H\(_2\)CO\(_3\) and Mg\(_3\)(PO\(_4\))\(_2\) will dissociate in water.
Therefore, the correct option are option A,B,D,E.
To learn more about chemical compound, here:
brainly.com/question/26487468
#SPJ2
What happens to unstable nuclei? (Select all that apply.)
1. They decay into more stable nuclei.
2. Their mass decreases by 50% with each half-life.
3. They emit radiation.
4. They combine to form more stable nuclei.
The activities which occurs in unstable nucleus from the above choices are:
They decay into more stable nuclei.Their mass decreases by 50% with each half-life.They emit radiation.They combine to form more stable nuclei.The correct answer choices are all 1, 2, 3 and 4.
How unstable nucleus decay into more stable nucleusIt follows that unstable nucleus usually, frequently and most of the time emit radiation and when this occur, it results to decay of substances.
From the task given above, it is crystal clear that that all the choices given above are happenings which occur when an unstable nucleus undergoes radioactive decay.
So therefore, we can now confirm that the nucleus of unstable atoms does decay into more stable nucleus.
Read more on unstable nucleus:
https://brainly.com/question/7067113
#SPJ1
5. Which of these elements has the greatest atomic radius? *
Be
Mg
Ra
Ba
the reaction of 1-bromobutane with sodium hydroxide affords the substitution product 1-butanol. what would happen to the rate of the reaction if the concentration of both 1-bromobutane and sodium hydroxide were doubled?
The rate increases by a factor of 4. IF the rate of the reaction concentration of both 1-bromo butane and sodium hydroxide were doubled
What is meant by rate of reaction?
The rate of reaction refers to the speed at which the products are formed from the reactants in a chemical reaction.The reaction rate or rate of reaction is that the speed at which a chemical reaction takes place, defined as proportional to the rise in the concentration of a product per unit time and to the decrease in the concentration of a reactant per unit time. Reaction rates can vary dramatically
Why is rate of reaction important?
The rate of a reaction is a powerful diagnostic tool. By checking out how fast products are made and what causes reactions to slow down we can develop methods to improve production. This information is important for the large scale manufacture of many chemicals including fertilizers, drugs and household cleaning items.
Learn more about rate of reaction :
brainly.com/question/25724512
#SPJ4
if a solution has a pH of 1.50, what is the pOH of the solution?
Answer:
pOH = 12.50
Explanation:
pOH + pH = 14
pOH = 14 - 1.50 = 12.50
when the reaction is complete, how will you find the number of moles of thiosulfate? how will the number of moles of thiosulfate added relate to the number of moles of hypochlorite originally present? explain briefly. knowing the number of moles of hypochlorite, how will this allow us to compute the concentration of hypochlorite in the bleach sample?
If we know how many moles of hypochlorite were initially present, we may calculate how much hypochlorite was present in the bleach sample. When the reaction is finished, the amount of thiosulfate added equals double that amount. \($ \mathrm{I}_2+2 \mathrm{~S}_2 \mathrm{O}_3^{2-}- > 2 \mathrm{I}^{-}+\mathrm{S}_4 \mathrm{O}_6^{2-}\)
What is thiosulfate?S₂O2−3 is the chemical formula for the sulfur oxyanion known as thiosulfate. Thiosulfate also refers to the salts of thiosulfuric acid that include this anion, such as sodium thiosulfate (Na₂S₂O₃). An industrial chemical with a long medical history is sodium thiosulfate (STS). It was first administered intravenously as a treatment for metal toxicity. Since then, it has been permitted to treat a number of uncommon medical disorders. These include cisplatin toxicity, cyanide poisoning, and calciphylaxis. Thiosulfate hydrolyzes to sulfite when dissolved in water. Mild reducing agents include sulfite and thiosulfate salts and their solutions.Thiosulfate, also referred to as thiosulfuric acid or [so2(OH)(SH), is a member of the group of inorganic substances known as non-metal thiosulfates. These are inorganic non-metallic compounds whose biggest oxoanion is thiosulfate. A very potent acidic substance is thiosulfate (based on its pKa).To learn more about thiosulfate, refer to:
https://brainly.com/question/22437316
#SPJ4
for an acid base indicator to work well for your titration, it should change color. t/f
A chemical known as an acid-base indicator alters color when the pH of a solution changes. this statement is true.
What is an acid-base indicator?When a chemical is protonated or deprotonated, it changes its color, making it an acid-base indicator. Since this color shift only happens within a certain pH range, indicators can be used to roughly determine the equivalence point of an acid-base titration. Acidic substances cause blue litmus paper to turn red. If something is basic or alkaline, blue litmus paper will become red. In basic solutions, litmus turns blue, while in acidic solutions, it turns red.If there is a base present, red litmus paper becomes blue. Upon contact with an acid, blue litmus paper turns crimson. Only whether a solution is an acid or a base may be determined by using litmus paper; the pH of the solution is not. Use pH paper, universal indicator solution, pH meters, or any combination of these to determine ph.To learn more about acid-base indicator refer to:
https://brainly.com/question/30553094
#SPJ4
Calculate either [H30), (OH), or pH for each of the following solutions at 25°C. a. Solution B: [H30*] = 9.87x10-M; [OH ) = (molar) b. Solution C: [HCl) = 0.123 M; PH= c. Solution D: pH = 2.1; [OH-] = (molar)
a. Solution B: [H₃O⁺] = 9.87x10⁻⁹ M; [OH⁻] = (molar)
b. Solution C: [HCl] = 0.123 M; pH =
c. Solution D: pH = 2.1; [OH⁻] = (molar)
a. In Solution B, the concentration of hydronium ions ([H₃O⁺]) is given as 9.87x10⁻⁹ M. This indicates the acidity of the solution. The concentration of hydroxide ions ([OH⁻]) is not provided.
b. In Solution C, the concentration of hydrochloric acid ([HCl]) is given as 0.123 M. To determine the pH, we need to calculate the negative logarithm of the hydronium ion concentration. pH = -log[H₃O⁺].
c. In Solution D, the pH is given as 2.1. This indicates the acidity of the solution. The concentration of hydroxide ions ([OH⁻]) is not provided.
To calculate the concentration of hydroxide ions ([OH⁻]) or determine the pH for each solution, more information is needed. Without the complete data, it is not possible to provide precise calculations or specific answers.
Learn more about molar
brainly.com/question/31545539
#SPJ11
What is the wavelength of an infrared photon that has a frequency of 2.13 x 10⁹
Hz?
The wavelength of an infrared photon that has a frequency of 2.13 x 10⁹
Hz is 0.14 m.
What is infrared radiation?
Infrared radiation is a type of electromagnetic radiation. It is a region of the electromagnetic spectrum and its wavelengths range from 700 nanometers (nm) to 1 millimeter (mm)Electromagnetic waves are waves that are created as a result of vibrations between an electric field and a magnetic field All electromagnetic waves ( whether gamma, radio or infrared) travel at the same speed. They all travel at the 'speed of light' through vacuum which is 3× 10⁸ meters per second.Speed of light, wavelength and frequency are related by a formula;c = ν λ
where
c = speed of light ⇒ 3×10⁸ m/s
ν = frequency ( Hz or s⁻¹ ) ⇒ 2.13 x 10⁹ Hz
λ = wavelength ( m ) ⇒ ?
substituting the values
c = ν λ
λ = c / ν
= (3×10⁸ m/s) / 2.13 x 10⁹
= 1.4 x 10⁻¹ m or 0.14 m
Thus we can conclude that the wavelength of an infrared photon that has a frequency of 2.13 x 10⁹Hz is 0.14 m.
Learn more about EM waves at https://brainly.com/question/25847009
#SPJ1
Wood has a density of 0.531 g/cm3. What is the volume of 44 grams of wood?
Answer:
The answer is 82.86 cm³Explanation:
The volume of a substance when given the density and mass can be found by using the formula
\(volume = \frac{mass}{density} \\ \)
From the question
mass of wood = 44 g
density = 0.531 g/cm³
It's volume is
\(volume = \frac{44}{0.531} \\ = 82.86252354...\)
We have the final answer as
82.86 cm³Hope this helps you
To construct the galvanic cell illustrated above, the salt bridge was prepared by soaking a piece of cotton in 5.0MNaNO3(aq) before placing it inside the U-shaped tube filled with distilled water. If the cotton was soaked in distilled water by mistake, which of the following best explains how the operation of the cell would be affected?
A
The operation of the cell is not affected because neither Na+(aq) nor NO3−(aq) is involved in the redox reaction that takes place.
B
The operation of the cell generates a higher potential because there are fewer ions in the solution, making the reaction more thermodynamically favored.
C
The cell will operate for a much longer time because the flow of electrons through the circuit will eventually be reversed.
D
The cell would not operate because a current could not be conducted between the half-cells.
D The cell would not operate because a current could not be conducted between the half-cells.
What is cell?Cell is the basic structural and functional unit of life. It is a complex, microscopic structure comprised of a variety of components and organelles that work together to perform vital biological functions. Cells can be single-celled organisms such as bacteria and protozoa, or they can be part of a multicellular organism such as a human. Cells are responsible for controlling and carrying out all of the processes necessary for life to exist, including metabolism, energy production, growth and development, and reproduction. Cells can come in various shapes and sizes and can be divided into two broad categories, prokaryotic and eukaryotic. Prokaryotic cells are found in bacteria and have no nucleus, while eukaryotic cells have a nucleus and are found in animals, plants, and fungi.
This is because salt bridges are used to provide a path for ions to move between the two compartments of the cell, and without them, the ions cannot move and thus no current can be conducted through the circuit.
Therefore the correct option is D.
To learn more about cell
https://brainly.com/question/26122239
#SPJ4
"No matter what phase water is in, the water molecules stay the same; they just move differently." Explain why this evidence matters:
Explanation:
If water is ice-form, only the gap between molecules reduces but the molecule remains the same. The gap between liquid water molecules is greater than that between the molecules. That's why ice is thinner than water.
The intermolecular gap now increases in the gaseous form, which makes it less heavier than solid ice and liquid water. However, the molecule still remain the same.
fatty acids are part of the structure of many lipids except:
Fatty acids are part of the structure of many lipids except for sterols.
What are lipids?
Lipids are macromolecules made up of hydrocarbon chains or rings, which means that they contain a lot of energy. Lipids are organic molecules that contain carbon, hydrogen, and oxygen in a proportion that varies depending on the specific molecule. They are non-polar and insoluble in water, which means that they do not dissolve in water.
Lipids are categorized into three different classes: Fats and oils (triglycerides), phospholipids, and steroids. They are essential to many cellular functions, including energy storage, insulation, and membrane formation.
Examples of lipids include butter, oil, and cholesterol.
Learn more about sterols: https://brainly.com/question/33424736
#SPJ11
Which of the following is the primary medium for beach erosion?
ice
gravity
wind
water
Answer:
Water is the primary erosion
hope it helps :)
what is the missing equation coefficient that belongs in front of oxygen (o2) in the combustion reaction for methane, ch4?
The missing equation coefficient that belongs in front of the oxygen in the combustion reaction for methane will be two.
The combustion reaction of Methane is:
CH₄ + 2O₂ --- CO₂ + 2H₂O + 890KJ
The combustion of hydrocarbon is to give Cabon dioxide and water and evolve a large amount of heat is called a combustion reaction. A combustion reaction is an exothermic reaction. It is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat.
Combustion reactions must involve O₂ as one reactant. Many hydrocarbons are used as fuel because their combustion releases very large amounts of heat energy. Complete combustion reactions sometimes referred to as clean combustion reactions, involve the complete oxidation of the fuel. Likewise, Methane releases its chemical energy by undergoing hydrocarbon combustion.
Learn more about the combustion reaction here:
https://brainly.com/question/12079874
#SPJ4
1- Hydrogenated compounds are considered as the most suitable fuels for spark ignition engines . 2- Due to increasing temperature, the chemical reaction rate also increase as the element moves from bu
Hydrogenated compounds, particularly hydrogen gas (H2), are often considered as potential fuels for spark ignition engines.
Hydrogenated compounds are considered the most suitable fuels for spark ignition engines because hydrogen is a highly flammable gas with a low ignition energy and a wide flammability range. When compared to gasoline or diesel, hydrogen has a higher energy content by weight, which makes it an attractive fuel choice.
Due to increasing temperature, the chemical reaction rate also increases as the element moves from a solid to a liquid to a gas.Physical state transitions are dependent on temperature, and the rate of chemical reactions that occur as a result of these state transitions is also influenced by temperature.
At higher temperatures, the chemical reaction rate typically rises as molecules have more kinetic energy and collide with one another more frequently.
To learn more about Hydrogenated compounds,
https://brainly.com/question/29148536
#SPJ4
7.0 mol AgNO3 reacts with 3.0 mol Zn in
a single replacement reaction.
2AgNO3 + Zn → 2Ag + Zn(NO3)2
How many moles of Zn(NO3)2 form
from 7.0 mol AgNO3?
[?] mol Zn(NO3)2
Round your answer to the tenths place.
mol Zn(NO₂)₂
Enter
According to stoichiometry and given chemical equation , 3.5 moles zinc nitrate are obtained from 7 .0 moles of silver nitrate.
What is stoichiometry?It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
In the given example as 2 moles of silver nitrate give 1 mole of zinc nitrate
∴7 moles of silver nitrate will give 7×1/2=3.5 moles of zinc nitrate.
Thus, 3.5 moles zinc nitrate are obtained from 7 .0 moles of silver nitrate.
Learn more about stoichiometry,here:
https://brainly.com/question/9743981
#SPJ1
suppose a beaker of octane is put inside a sealed tank containing octane gas at 115. degree c and 544. torr. after ten minutes, will there be more liquid in the beaker, less liquid, or the same amount? explanation
Based on the given information, the beaker contains octane liquid and is sealed inside a tank filled with octane gas at a high temperature of 115 degrees Celsius and a pressure of 544 torr.
At this temperature and pressure, octane has a high vapor pressure, which means that some of the liquid octane in the beaker will evaporate and form octane gas.
As the gas molecules collide with the surface of the liquid, some of them will condense back into liquid phase, resulting in an equilibrium between the liquid and gas phases.
Since the system is sealed, the total amount of octane (in both liquid and gas phases) will remain constant. However, the amount of liquid octane in the beaker will decrease over time due to evaporation, while the amount of octane gas in the tank will increase.
Therefore, after ten minutes, there will be less liquid octane in the beaker than initially present, but the total amount of octane (in both liquid and gas phases) will remain constant.
Learn more about beaker here:brainly.com/question/29475799
#SPJ11
What best describes the interaction described below:
Dodder and shrub. The Dodder plant grows on the shrub. The dodder takes water from the shrub and the branches of the dodder pierce the tissues of the shrub. Eventually the shrub will die.
Group of answer choices
One method of obtaining these nutrients from the shrub is through the branches of the Dodder plant penetrating the tissues of the shrub. This is an illustration of a partnership in which only one creature benefits.
What really is tissue and what does it do?Tissue is a collection of cells with a common structure and function that work as a single unit. The brain give it shape and help it retain heat and energy. ibrocartilage, epithelial tissue, muscle tissue, and nervous tissue are the four different types of tissues.
What do cells in tissue do?Your organism is made up of cells, and tissues are created when groupings of cells carry out similar tasks. Your body consists mostly of four different tissue types: connective, epithelial, muscular, and nervous tissue. Organs are cushioned and joined together by connective tissue. The skin's outer layer is made up of epithelial tissue.
To know more about tissues visit:
https://brainly.com/question/17664886
#SPJ1
Twenty students were surveyed to find out how many hours of TV they watch during a school week. The results are shown to the right. Answer the following questions and round your answers to the nearest half hour. The mean of the data is ____ hours.
Answer: 4.5
Explanation:
Just did it
Answer:
5 Hours
Explanation: I just wanted to save your time and i added all the hours up divided by 20 which i got 4.95 then rounded up to 5.
Question Which of the hypothesis tests listed below is a left-tailed test? Select all correct answers. Select all that apply OH 18, H₁ 19.3 H₂8. H:/8. OH-11.3 Hp
Among the given options, the tests that are left-tailed are H0:μ≥18, Ha:μ<18, H0:μ≥11.3, Ha:μ<11.3, and H0:μ≥3.7, Ha:μ<3.7.
In these tests, the null hypothesis (H0) states that the population mean (μ) is greater than or equal to a specific value, while the alternative hypothesis (Ha) suggests that the population mean is less than that value.
A left-tailed test is used when the alternative hypothesis suggests that the population parameter is less than a certain value.
This indicates a left-tailed test, where the critical region is in the left tail of the distribution. These tests focus on detecting a significant decrease or difference in the population mean.
To know more about the left-tailed test refer here :
https://brainly.com/question/31431592#
#SPJ11
Complete question :
Which of the hypothesis tests listed below is a left-tailed test? Select all correct answers.
Select all that apply: H0:μ≥18, Ha:μ<18 H0:μ≤19.3, Ha:μ>19.3 H0:μ=8, Ha:μ≠8 H0:μ≥11.3, Ha:μ<11.3 H0:μ≥3.7, Ha:μ<3.7
The water in the beaker is ____________ and is converted into ___________. The process is known as ______________. If you hold a metal plate near the steam, it __________ into water and water droplets can be seen on the plate. This is an example of _____________ change.
The water in the beaker is in its liquid state, and when heated, it is converted into steam or water vapor. The process of this conversion is known as evaporation.
If you hold a metal plate near the steam, the steam will cool down upon contact with the plate. As a result, it condenses back into liquid water, forming water droplets on the plate. This is an example of condensation.
Evaporation and condensation are both phase changes of water. Evaporation occurs when liquid water gains enough energy from heat to overcome intermolecular forces and transform into a gas (water vapor). Condensation, on the other hand, happens when water vapor loses energy and transforms back into liquid water due to cooling.
The process of water evaporating into steam, then condensing back into water droplets on the metal plate, exemplifies a physical change. It involves a change in the physical state of water without any alteration to its chemical composition. The molecules remain the same, but their arrangement and energy levels change, resulting in different observable states (liquid and gas) during evaporation and condensation, respectively.
To know more about evaporation and condensation click this link-
https://brainly.com/question/956180
#SPJ11
How do renewable and nonrenewable resources differ?
Natural resources are those that are accessible without human intervention. Like the sun, the atmosphere, the air, the water, the land, the mines, the vegetation, and animal life.
There are two categories of natural resources: renewable resources and non-renewable resources.Renewable resources :
These are the kind of natural resources that, even after constant use, do not become exhausted or depleted.For example, Wind and SunlightThese have low carbon footprints and low carbon emissions.Infrastructure costs for the production of renewable energy are very costly.Doesn't cause Pollution. Cause Pollution when usedNon Renewable resources :
These are the natural resources that, as a result of ongoing human usage, become exhausted or depleted and are neither renewed nor replaced.For example, groundwater, fossil fuels, and mineral ores etc.These emit more carbon than other, which increases their carbon footprint.Infrastructure costs for the production of energy from these resources are low.Learn more about natural resources here:
https://brainly.com/question/24514288
#SPJ9
Task 1:
Which process involves the movement of sediment?
a. Deposition
b. Weathering
c. Erosion
d. Cementing