They all are liquid (at room temperature), all are homogeneous mixture.
if a pork roast must absorb 1600 kj to fully cook, andif only 12% of the heat produced by the barbeque isactually absorbed by the roast, what mass of co2 isemitted into the atmosphere during the grilling of thepork roast?
The heat that is absorbed by the roast is 12% of 1600 kJ = 0.12 x 1600 = 192 kJ. Carbon dioxide (CO2) is a greenhouse gas that causes climate change.
Barbecuing meat releases carbon dioxide into the atmosphere. The amount of carbon dioxide released is determined by the amount of fuel used, the cooking time, and the temperature. Let's see how much carbon dioxide is emitted into the atmosphere during the grilling of the pork roast.
1. The heat that is absorbed by the roast is 192 kJ.
2. To produce 192 kJ, the barbecue will need to use fuel. The type and amount of fuel used will determine the amount of carbon dioxide that is emitted into the atmosphere.
3. Assuming that the fuel used is propane, the amount of carbon dioxide produced by burning one liter of propane is 1.51 kg/L.
4. To determine the amount of propane used, we need to know the amount of heat produced by the barbecue.
5. The amount of heat produced by the barbecue depends on the temperature and cooking time.
6. Assuming that the cooking time is 1 hour and the temperature is 250°C, the amount of heat produced by the barbecue is 37.7 MJ/h.
7. To produce 37.7 MJ, the barbecue will need to use 24.9 L of propane.
8. The amount of carbon dioxide emitted into the atmosphere is 1.51 kg/L x 24.9 L = 37.6 kg.
Therefore, 37.6 kg of carbon dioxide is emitted into the atmosphere during the grilling of the pork roast. Grilling meat releases carbon dioxide into the atmosphere, which is a greenhouse gas that contributes to climate change. The amount of carbon dioxide produced is determined by the amount of fuel used, the cooking time, and the temperature.
The heat that is absorbed by the roast is 12% of 1600 kJ = 0.12 x 1600
= 192 kJ.
To produce 192 kJ, the barbecue will need to use fuel. Assuming that the fuel used is propane, the amount of carbon dioxide produced by burning one liter of propane is 1.51 kg/L.
To determine the amount of propane used, we need to know the amount of heat produced by the barbecue.
Assuming that the cooking time is 1 hour and the temperature is 250°C, the amount of heat produced by the barbecue is 37.7 MJ/h. To produce 37.7 MJ, the barbecue will need to use 24.9 L of propane.
The amount of carbon dioxide emitted into the atmosphere is 1.51 kg/L x 24.9 L = 37.6 kg.
Therefore, 37.6 kg of carbon dioxide is emitted into the atmosphere during the grilling of the pork roast.
The mass of CO2 emitted into the atmosphere during the grilling of the pork roast is 37.6 kg. Grilling meat releases carbon dioxide into the atmosphere, which is a greenhouse gas that causes climate change. The amount of carbon dioxide produced is determined by the amount of fuel used, the cooking time, and the temperature. To determine the amount of carbon dioxide produced, we need to know the amount of heat absorbed by the roast and the amount of fuel used by the barbecue. The fuel used by the barbecue will depend on the type of barbecue, the cooking time, and the temperature. Therefore, it is important to consider the environmental impact of grilling meat and to take steps to reduce carbon emissions.
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What is the shorthand notation that represents the following galvanic cell reaction? 2co2 (aq) cl2(g) → 2co3 (aq) 2 cl-(aq)
The shorthand notation provides a concise representation of the galvanic cell reaction, facilitating easy understanding and analysis of the chemical process occurring within the cell.
The shorthand notation for the given galvanic cell reaction is:
2 CO2(aq) + Cl2(g) → 2 CO3(aq) + 2 Cl^-(aq)
In the shorthand notation, the reactants and products of the galvanic cell reaction are listed, indicating their respective states. The coefficients in front of the chemical formulas represent the stoichiometric coefficients, indicating the number of molecules or moles involved in the reaction.
In this case, the reaction involves the oxidation of Cl2 (chlorine gas) and the reduction of CO2 (carbon dioxide) to CO3 (carbonate ions). The balanced equation shows that 2 molecules of CO2 react with 1 molecule of Cl2 to form 2 molecules of CO3 and 2 Cl^- ions.
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HELP PLS | What type of energy is circulated by convection in Earth's atmosphere?
A.Electrical
B.Nuclear
C.Potential
D.Thermal
Answer:
Thermal
Explanation:
convection is the transfer of heat in a fluid
the experimentally determined atomic mass of f-19 is 18.99840 amu. calculate the mass defect, the binding energy in j/mol the binding energy in mev/atom.
the mass defect is 19.328408 amu, the binding energy is 4.806577 x 10¹² J/mol, and the binding energy is 3.003349 x 10⁴ MeV/atom for F-19.
To calculate the mass defect, binding energy in joules per mole (J/mol), and binding energy in mega-electron volts per atom (MeV/atom), we need to use Einstein's mass-energy equivalence equation, E = mc².
The mass defect (Δm) can be calculated by subtracting the experimentally determined atomic mass (m) of F-19 from its nominal mass (m0), which can be calculated by summing the masses of individual protons, neutrons, and electrons.
The binding energy (E) can be calculated by multiplying the mass defect by the speed of light squared (c²). Then, the binding energy in J/mol can be obtained by dividing the binding energy by Avogadro's constant (NA). Finally, the binding energy in MeV/atom can be obtained by dividing the binding energy in J/mol by the conversion factor 1.6022 x 10⁻¹³.
Given:
Experimental atomic mass of F-19 (m) = 18.99840 amu
To calculate the nominal mass (m0) of F-19, we can refer to the atomic mass of individual particles:
Proton mass = 1.007276 amu
Neutron mass = 1.008665 amu
Electron mass = 0.000548597 amu
Nominal mass (m0) of F-19 = (19 protons * proton mass) + (19 neutrons * neutron mass) + (19 electrons * electron mass)
Let's calculate the values:
m0 = (19 * 1.007276) + (19 * 1.008665) + (19 * 0.000548597)
= 19.145444 + 19.170935 + 0.010429743
= 38.326808 amu
Now we can calculate the mass defect (Δm):
Δm = m0 - m
= 38.326808 - 18.99840
= 19.328408 amu
To calculate the binding energy in J/mol:
E = Δm * c²
First, we need to convert amu to kg (kilograms). The conversion factor is:
1 amu = 1.66053906660 x 10⁻²⁷ kg
Converting the mass defect to kilograms:
Δ[tex]m_{kg}[/tex] = Δm * (1.66053906660 x 10⁻²⁷)
= 19.328408 * (1.66053906660 x 10⁻²⁷)
= 3.2088702091 x 10⁻²⁶ kg
Next, we need to calculate the binding energy (E) in joules:
E = Δ[tex]m_{kg}[/tex] * c²
The speed of light, c = 2.998 x 10⁸ m/s
E = (3.2088702091 x 10⁻²⁶ kg) * (2.998 x 10⁸ m/s)²
= 2.89404437658 x 10⁻¹¹ J
To calculate the binding energy in J/mol, we divide E by Avogadro's constant (NA):
NA = 6.02214076 x 10²³ mol⁻¹ (Avogadro's constant)
Binding energy in J/mol = E / NA
= (2.89404437658 x 10⁻¹¹ J) / (6.02214076 x 10²³ mol⁻¹)
= 4.806577 x 10¹² J/mol
Finally, to calculate the binding
energy in MeV/atom, we divide the binding energy in J/mol by the conversion factor 1.6022 x 10⁻¹³:
Binding energy in MeV/atom = (4.806577 x 10¹² J/mol) / (1.6022 x 10⁻¹³ J/MeV)
= 3.003349 x 10⁴ MeV/atom
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what is the destiny of an object with the mass of 320 grams and a volume of 47.5 ml
Density = mass/volume
So, density
= 320g/47.5ml
= 6.73g/ml (approximately)
How many carbon atoms are in 10 moles of benzene
Answer:
60 i think im not sure
Explanation:
Which isotope of nitrogen is more abundant nitrogen-14 or nitrogen-15
Answer:
Natural nitrogen (7N) consists of two stable isotopes the vast majority (99.6%) of naturally occurring nitrogen is nitrogen-14 with the remainder being nitrogen-15.
Explanation:
according to le chatelier, the position of equilibrium will move in such a way as to counteract a change in conditions such as concentration, pressure, etc.select one:truefalse
True. According to Le Chatelier's principle, the position of equilibrium in a chemical reaction will shift in order to counteract changes in the conditions that affect the equilibrium, such as concentration, pressure, or temperature.
When a system at equilibrium experiences a change, the equilibrium will adjust itself to minimize the impact of that change. For example, if the concentration of one of the reactants or products is increased, the equilibrium will shift in the direction that consumes some of the excess, reducing the concentration back to its original value. Similarly, if the pressure is increased, the equilibrium will shift in the direction that reduces the number of moles of gas to decrease the pressure.
Le Chatelier's principle provides a useful framework for predicting and understanding how changes in conditions affect the equilibrium position and can help explain the behavior of chemical reactions in response to external influences.
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Select all of the following that are true about homogeneous mixtures.
Air is an example. Can be separated into other kinds of matter by physical processes such as evaporation or filtering. Same molecular composition throughout. Visibly can't tell if it's a pure substance or not. Composed of only one type of atom or molecule. sometimes called a solution Composed of two or more different types of atoms or molecules All the same molecules. Layers or chunks or distinct particles visible
True: Can be separated into other kinds of matter by physical processes such as evaporation or filtering. Same molecular composition throughout. Visibly can't tell if it's a pure substance or not. Sometimes called a solution.
Homogeneous mixtures are uniform throughout, meaning the composition and properties are the same in all parts of the mixture. This makes it difficult to visually distinguish a homogeneous mixture from a pure substance.
Additionally, homogeneous mixtures can be separated into their components through physical processes like evaporation or filtering.
However, the following statements are not true about homogeneous mixtures: Composed of only one type of atom or molecule. (Homogeneous mixtures can be composed of multiple types of atoms or molecules.) All the same molecules. (Homogeneous mixtures can contain different types of molecules.). Layers or chunks or distinct particles visible. (Homogeneous mixtures appear visually uniform and do not exhibit visible separation or distinct particles.)
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An aspirin tablet contains 325.0 mg of aspirin, which has the molecular formula, C_9H_8O_4. How many moles of aspirin are in the tablet? moles How many molecules of aspirin are in the tablet? molecules
In an aspirin tablet containing 325.0 mg of aspirin (C9H8O4), there are approximately 1.99 moles of aspirin. This corresponds to approximately 1.20 x 10^24 molecules of aspirin.
To determine the number of moles of aspirin in the tablet, we need to use the molar mass of aspirin (C9H8O4). The molar mass is calculated by summing up the atomic masses of all the atoms in the molecular formula.
Molar mass of aspirin (C9H8O4):
(9 * atomic mass of carbon) + (8 * atomic mass of hydrogen) + (4 * atomic mass of oxygen)
Calculating the molar mass using the atomic masses from the periodic table, we find that the molar mass of aspirin is approximately 180.16 g/mol.
Now, we can convert the given mass of the aspirin tablet (325.0 mg) to moles using the formula:
moles = mass / molar mass
Substituting the values, we get:
moles = 325.0 mg / 180.16 g/mol
Calculating this, we find that the number of moles of aspirin in the tablet is approximately 1.99 moles.
To determine the number of molecules of aspirin, we use Avogadro's number, which states that 1 mole of any substance contains 6.022 x 10^23 particles (molecules, atoms, etc.). Therefore, the number of molecules of aspirin in the tablet is:
molecules = moles * Avogadro's number
molecules = 1.99 moles * 6.022 x 10^23 molecules/mol
Calculating this, we find that there are approximately 1.20 x 10^24 molecules of aspirin in the tablet.
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how many sodium atoms does 2NaOH have?
Answer:
1
Explanation:
Answer: 1 sodium atom
Explanation:
Na -1 sodium
H -3 hydogen
O -1 oxygen
Match each of the following descriptions with one of the beakers in Model 1. In each case assume that the change in volurne as the solid(s) are added is minimal. Hint: Calculate the molarity of any soluble ions after the solids have dissolved or solutions have been mixed a. b. Beaker _ contains 500.0 mL of 1.00 M acetic acid. contains 0.250 mole of solid sodium acetate, NaCH,COO, dissolved into contains 0.0500 mole of solid zinc acetate, Zn(CH,COO)2, dissolved into contains 250.0 ml, of 0.40 M hydrochloric acid mixed with 250.0 mL of 500.0 mL of 1.00 M acetic acid. .Beakerc 500.0 mL of 1.00 M acetic acid. d. Beaker 2.00 M acetic acid.
a) Beaker _ contains 500.0 mL of 1.00 M acetic acid - beaker C . b) beaker D. c)beaker B. d)beaker A
We need to match the given descriptions with the appropriate beakers in Model 1. Let's analyze each description and determine the corresponding beaker: a. Beaker _ contains 500.0 mL of 1.00 M acetic acid. This description matches with beaker C because it explicitly states that it contains 500.0 mL of 1.00 M acetic acid.
b. Beaker _ contains 0.250 mole of solid sodium acetate, NaCH3COO, dissolved into...
This description matches with beaker D because it involves the dissolution of solid sodium acetate, NaCH3COO, which would result in an increase in the concentration of acetic acid in the solution.
c. Beaker _ contains 0.0500 mole of solid zinc acetate, Zn(CH3COO)2, dissolved into...
This description matches with beaker B because it involves the dissolution of solid zinc acetate, Zn(CH3COO)2, which would result in the formation of zinc ions (Zn2+) and acetate ions (CH3COO-) in the solution.
d. Beaker _ contains 250.0 mL of 0.40 M hydrochloric acid mixed with 250.0 mL of 2.00 M acetic acid.
This description matches with beaker A because it involves the mixing of hydrochloric acid and acetic acid, resulting in a combined solution with a different concentration and volume than the individual components.
Beaker A contains 250.0 mL of 0.40 M hydrochloric acid mixed with 250.0 mL of 2.00 M acetic acid.
Beaker B contains 0.0500 mole of solid zinc acetate, Zn(CH3COO)2, dissolved into...
Beaker C contains 500.0 mL of 1.00 M acetic acid.
Beaker D contains 0.250 mole of solid sodium acetate, NaCH3COO, dissolved into...
By matching the descriptions with the beakers in Model 1, we can associate each statement with the corresponding beaker.
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What type of energy is present when a car drives across a flat surface
Answer
Kinetic energy
Kinetic energy is produced by motion. In the driving example above, the only thing keeping the vehicle's potential energy from becoming kinetic energy is the car's brakes.
Explanation:
The given graduated cylinder is calibrated inmilliliters (mL).
Determine the volume of liquid in the graduated cylinder
and report it to the correct number of significant figures.
Volume________mL
The digit in the tenths place is estimated based on how close the liquid level is to the 0.2 mL mark, which is halfway between 0.1 mL and 0.3 mL.
To determine the volume of liquid in the given graduated cylinder, we use the markings on the cylinder and report the answer to the correct number of significant figures.
Here are the steps to follow:
1. Look at the volume markings on the graduated cylinder. The liquid in the cylinder should be between two of the markings.
2. Determine the lowest marking that is visible on the cylinder. This represents the nearest 0.1 mL.
3. Estimate the next digit to the right based on how close the liquid level is to the next marking.
4. If the liquid level is halfway between two markings, estimate 0.05 mL.
5. Record the volume of the liquid in the graduated cylinder to the correct number of significant figures.
Here's an example: If the liquid level is between 25.0 mL and 26.0 mL, and it's closer to the 25.0 mL marking, the volume would be reported as 25.2 mL (three significant figures).
The digit in the tenths place is estimated based on how close the liquid level is to the 0.2 mL mark, which is halfway between 0.1 mL and 0.3 mL.
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Calculate the expected amount of Ni deposited on a zinc electrode under conditions of 2.00 V and a current of 5.00 amperes for 15.00 minutes.
Under the given conditions of 2.00 V and a current of 5.00 A for 15.00 minutes, approximately 1.37 grams of Ni is expected to be deposited on the zinc electrode using Faraday's law of electrolysis.
To calculate the expected amount of Ni deposited on a zinc electrode, we can use Faraday's law of electrolysis, which relates the amount of substance deposited to the current, time, and molar mass.
The equation for Faraday's law is:
moles of substance = (current * time) / (n * F)
Where:
current is the electric current in amperes (A)
time is the time in seconds (s)
n is the number of electrons transferred in the reaction (equal to the stoichiometric coefficient of the substance in the balanced equation)
F is Faraday's constant, approximately 96,485 coulombs per mole of electrons
First, we need to determine the number of moles of electrons transferred in the reaction. The balanced equation for the deposition of Ni is:
Ni2+(aq) + 2e- -> Ni(s)
From the equation, we can see that 2 moles of electrons are required for the deposition of 1 mole of Ni.
Given:
current = 5.00 amperes
time = 15.00 minutes = 15.00 * 60 seconds = 900 seconds
n = 2
Substituting the values into Faraday's law:
moles of Ni = (5.00 A * 900 s) / (2 * 96,485 C/mol)
moles of Ni = 0.0234 mol
Finally, to determine the amount of Ni deposited, we need to multiply the number of moles by the molar mass of Ni, which is 58.69 g/mol:
mass of Ni = 0.0234 mol * 58.69 g/mol
mass of Ni = 1.37 g
Therefore, the expected amount of Ni deposited on the zinc electrode under the given conditions is approximately 1.37 grams.
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What is the general formula for a compound if anions occupy the hcp lattice points and cations occupy all the octahedral and tetrahedral holes?
a. AB
b. A3B
c. A2B
d. AB2
The general formula for a compound where anions occupy the hcp lattice points and cations occupy all the octahedral and tetrahedral holes is option (d) AB2.
In a hexagonal close-packed (hcp) lattice structure, anions occupy the lattice points, and cations can occupy both the octahedral and tetrahedral holes within the lattice. The arrangement of the cations in these holes depends on the ratio of cations to anions in the compound.
In this case, the general formula for the compound can be represented as AB2, where A represents the cation and B represents the anion. The number 2 in the formula indicates that each cation A is surrounded by two anions B in the lattice.
By selecting option (d) AB2, we imply that the cations occupy all the octahedral and tetrahedral holes in the hcp lattice, resulting in a compound with the specified arrangement of anions and cations.
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How many moles of magnesium is 3.01 x 1022 atoms of magnesium? 2. Find the mass in 2.6 mol of lithium bromide 3. Use the equation below to answer questions 3a and 3b_ CbH12O6-- 2C2HsOH 2C02 How many moles of COz are produced when 0.400 mole of CoHizO6 reacts in this fashion? How many grams of COz form when 7.50g of CzHsOH are produced? Your silver watchband has mass of 326 g How many atoms of Ag do vou have? Equlvalent statements mole 6.02 x 1023 particles 1 mole 6.02 x 1023 atoms 1 mole 6.02 x 1023 molecules mole molar mass
Approximately 0.05 moles of magnesium are present in 3.01 x 10^22 atoms of magnesium.
The mass of lithium bromide in 2.6 moles is approximately 226.34 g.
3a. When 0.400 mole of C6H12O6 reacts, 0.800 mole of CO2 is produced.
3b. When 7.50 g of C2H5OH is produced, approximately 14.31 g of CO2 is formed.
In a 326 g silver watchband, there are approximately 1.82 x 10^24 atoms of Ag.
1. To find the number of moles of magnesium from the given number of atoms:
Given: Number of atoms of magnesium = 3.01 x 10^22 atoms
We know that 1 mole of any substance contains 6.02 x 10^23 particles (Avogadro's number).
First, we need to calculate the number of moles of magnesium:
Number of moles = Number of atoms / Avogadro's number
Number of moles = (3.01 x 10^22) / (6.02 x 10^23)
Number of moles ≈ 0.05 moles
Therefore, there are approximately 0.05 moles of magnesium in 3.01 x 10^22 atoms of magnesium.
2. To find the mass of lithium bromide in 2.6 moles:
Given: Number of moles of lithium bromide = 2.6 mol
To calculate the mass, we need to know the molar mass of lithium bromide (LiBr).
Molar mass of LiBr = (6.94 g/mol) + (79.90 g/mol) = 86.84 g/mol
Mass = Number of moles * Molar mass
Mass = 2.6 mol * 86.84 g/mol
Mass ≈ 226.34 g
Therefore, the mass of lithium bromide in 2.6 moles is approximately 226.34 g.
3a. To find the number of moles of CO2 produced when 0.400 mole of C6H12O6 reacts:
The balanced equation indicates that 1 mole of C6H12O6 produces 2 moles of CO2.
Number of moles of CO2 = 2 * 0.400 mol
Number of moles of CO2 = 0.800 mol
Therefore, when 0.400 mole of C6H12O6 reacts, 0.800 mole of CO2 is produced.
3b. To find the mass of CO2 formed when 7.50 g of C2H5OH is produced:
The balanced equation shows that 1 mole of C6H12O6 produces 2 moles of CO2.
First, we need to calculate the number of moles of C2H5OH:
Molar mass of C2H5OH = (2 * 12.01 g/mol) + (6 * 1.01 g/mol) + (1 * 16.00 g/mol) = 46.07 g/mol
Number of moles of C2H5OH = Mass / Molar mass
Number of moles of C2H5OH = 7.50 g / 46.07 g/mol
Number of moles of C2H5OH ≈ 0.163 mol
According to the equation, 2 moles of CO2 are produced per mole of C6H12O6. Therefore, the number of moles of CO2 produced is also 2 times the number of moles of C2H5OH:
Number of moles of CO2 = 2 * 0.163 mol
Number of moles of CO2 ≈ 0.326 mol
To find the mass of CO2, we can use the molar mass of CO2:
Molar mass of CO2 = (12.01 g/mol) + (2 * 16.00 g/mol) = 44.01 g/mol
Mass of CO2 = Number of moles * Molar mass
Mass of CO2 = 0.326 mol * 44.01 g/mol
Mass of CO2 ≈ 14.31 g
Therefore, when 7.50 g of C2H5OH is produced, approximately 14.31 g of CO2 is formed.
4. To find the number of atoms of Ag in a 326 g silver watchband:
Given: Mass of Ag = 326 g
First, we need to calculate the number of moles of Ag:
Molar mass of Ag = 107.87 g/mol
Number of moles of Ag = Mass / Molar mass
Number of moles of Ag = 326 g / 107.87 g/mol
Number of moles of Ag ≈ 3.02 mol
Since 1 mole of Ag contains 6.02 x 10^23 atoms (Avogadro's number), the number of atoms of Ag can be calculated as:
Number of atoms of Ag = Number of moles of Ag * Avogadro's number
Number of atoms of Ag ≈ 3.02 mol * 6.02 x 10^23 atoms/mol
Number of atoms of Ag ≈ 1.82 x 10^24 atoms
Therefore, in a 326 g silver watchband, there are approximately 1.82 x 10^24 atoms of Ag.
Note: The equivalent statements at the end refer to the relationships between moles, particles (atoms or molecules), and molar mass in the context of Avogadro's number.
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1a. ____ b. ____
2a. ____ b. ____
3a. ____ b. ____
4a. ____ b. ____
5a. ____ b. ____
6a. ____ b. ____
7a. ____ b. ____
8a. ____ b. ____
9a. ____ b. ____
The statement means that in every interaction, 9a b
In order to come up with our modern-day atomic model, scientists added knowledge
to pre-existing discoveries. Which of the following shows the correct sequence of
scientists?
5. which of the following statements concerning entropy is/are correct?1. the entropy of a substance increases when converted from a liquid to a solid.2. the entropy of a substance decreases as the number of atoms increases3. all substances have positive entropy values at temperatures above 0 k.
3. All substances have positive entropy values at temperatures above 0 K. this is correct statement.
Statement 1 is incorrect. The entropy of a substance generally increases when it is converted from a solid to a liquid. The increased freedom of movement and greater number of available microstates in the liquid phase lead to an increase in entropy.
Statement 2 is incorrect. The entropy of a substance generally increases as the number of atoms or particles increases. More atoms or particles contribute to a greater number of possible arrangements and microstates, resulting in higher entropy.
Statement 3 is correct. According to the third law of thermodynamics, all substances have positive entropy values at temperatures above absolute zero (0 K). At absolute zero, the entropy of a perfectly ordered crystal is considered to be zero, but as the temperature increases, the randomness and disorder (entropy) of the system also increase.
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will give brainliest this is simple plz help
irons position on the periodic table and its chemical properties based on that position
Answer:
IIron is the 26th element on the periodic table. It is located in period 4 and group 8. And for the properties, iron, like other metals, conducts heat and electricity, has a luster, and forms positive ions in its chemical reactions. Pure iron is fairly soft and can easily be shaped and formed when hot. Its color is silvery white. Iron is easily magnetized.
Explanation:
When an asteroid hit the Earth 65 million years ago, it threw a huge amount of dust into the atmosphere. This dust cloud stayed in the sky, blocking out the Sun for at least 10 years. Why did most of the animals on the Earth go extinct at this time?
A. The dust cloud prevented plants from making food
B. The asteroid started fires that burned the Earth
C. The Sun turned off
Answer:
A. i think
Explanation:
hope this helps u!
The dust cloud created by the asteroid impact caused a global climate change that drastically altered the Earth's environment. Hence, option A is correct.
What are the impacts of asteroids ?The dust and debris in the atmosphere blocked out the Sun's rays, causing a cooling effect on the planet's surface. This reduction in sunlight meant that photosynthesis, the process by which plants make food, was greatly reduced.
As a result, plant life was severely affected, leading to the extinction of many herbivorous animals that relied on them for food.
The loss of herbivores then caused a chain reaction of extinctions among carnivorous animals that relied on them for food. Additionally, the impact and resulting earthquakes and tsunamis, along with the massive fires that likely occurred, also contributed to the mass extinction event.
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how many grams of glucose would be produced if 4.79 grams of water reacts with excess co2 and the reaction has a yield of 71.8%?
It is possible to determine the amount of glucose produced if 4.79 grams of water react with excess CO2 and the reaction has a yield of 71.8 percent. The equation of the reaction is as follows:CO2 + H2O → H2CO3 The next step is to convert 4.79 grams of water to moles: 4.79 g H2O x (1 mol H2O / 18.015 g H2O) = 0.265 mol H2O.
From the chemical equation, it is clear that one mole of water produces one mole of H2CO3. Thus,0.265 mol H2O x (1 mol H2CO3 / 1 mol H2O) = 0.265 mol H2CO3Now, if the reaction has a yield of 71.8 percent, it means only 71.8 percent of the expected amount of product is produced. Therefore, the actual amount of H2CO3 produced is:0.265 mol H2CO3 x 0.718 = 0.191 gram H2CO3. Finally, one mole of H2CO3 produces one mole of glucose. The molar mass of glucose is 180.16 g/mol, and therefore: 0.191 mol H2CO3 x (1 mol glucose / 1 mol H2CO3) x (180.16 g glucose / 1 mol glucose) = 34.5 g glucose. Thus, 34.5 grams of glucose are produced if 4.79 grams of water reacts with excess CO2 and the reaction has a yield of 71.8 percent.
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What causes air masses to move?
A: A difference in air pressure and temperature occurs.
B: Weather conditions change rapidly to produce storms.
C: A collision takes place bahween two natural wind patterns.
D: Long, narrow bands of wind blow in the upper atmosphere.
Answer:
the answer is A the temperature effects the movement of air by if its warm air it moves up and colder moves down while the pressure effects how fast and the directions it moves
What is the result of rocks poor ability to transmit heat
Answer:
It cools very quickly
Explanation:
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The figure shows a tank with two immiscrble liquid is andar. The vacuum gauges hown indicates a reading of 17.17KPo Determire a) Absolut pressure at point [ b) Relative pressure atpoint F, with respect to the ain in the tank; that is, if said air were the environrent of the instrument of measurerest Patm =77.17[kpa]g=81 g=9.81[m(s2] Environmental temperatice: 20[∘C] δ=0.68δ=0.8
a) The absolute pressure at point B cannot be determined based on the given information.
b) The relative pressure at point F, with respect to the air in the tank, is also indeterminable with the provided information.
a) The absolute pressure at point B cannot be determined because the information about the liquid levels or the densities of the liquids in the tank is not provided.
The absolute pressure depends on the height of the liquid column and the density of the liquid, which are missing from the given data. Without this information, it is not possible to calculate the absolute pressure at point B.
b) The relative pressure at point F, with respect to the air in the tank, is also indeterminable. To calculate the relative pressure, we need to know the absolute pressure at point F and subtract the atmospheric pressure.
However, the absolute pressure at point F is not given, so we cannot determine the relative pressure. Additionally, the value of atmospheric pressure (Patm) provided is not relevant to calculating the relative pressure at point F.
In order to determine the absolute pressure at point B or the relative pressure at point F, we would need additional information such as the liquid levels in the tank, the densities of the liquids, and possibly the atmospheric pressure at point F.
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How many neutrons would an atom of fluorine have?
Answer:
the ansewer would be nine
Explanation:
what diene and dienophile would you need to prepare 1-methyl-4-prorylcyclohexene?
To prepare 1-methyl-4-propylcyclohexene, the diene required is 1,3-cyclohexadiene, and the dienophile needed is 1-butene.
1-methyl-4-propylcyclohexene is a substituted cyclohexene compound. It can be synthesized through a Diels-Alder reaction, which involves the combination of a diene and a dienophile.
In this case, the diene required is 1,3-cyclohexadiene. It is a conjugated diene with two double bonds in the cyclohexene ring system.
The dienophile needed is 1-butene, which is an alkene with a double bond located at the terminal carbon of the butyl chain.
By performing a Diels-Alder reaction between 1,3-cyclohexadiene (diene) and 1-butene (dienophile), 1-methyl-4-propylcyclohexene can be obtained.
It's important to note that appropriate reaction conditions, such as temperature, solvent, and catalyst, may also be required to facilitate the reaction and achieve the desired product.
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what process takes place in stars
Answer:
Explanation:
Stars are powered by nuclear fusion in their cores, mostly converting hydrogen into helium. The production of new elements via nuclear reactions is called nucleosynthesis. A star's mass determines what other type of nucleosynthesis occurs in its core (or during explosive changes in its life cycle).
pure substance is a substance have constant composulition and uniform properties throught a sample what througt a sample mean?
Answer:
Matter that has the same composition and properties throughout is called a substance.
Explanation:
