keeps soils at a comfortable temperature. Composting helps to keep soil temperatures at a consistent level, which helps to optimize the growth of beneficial organisms and plants.
What is temperature?Temperature is a measure of the degree or intensity of heat or cold in a body or environment. Temperature is measured using a thermometer, which is an instrument that detects the temperature of an object or environment by measuring the intensity of certain physical properties such as thermal expansion of gas, electrical resistance or the velocity of sound. Temperature is typically measured in degrees Celsius (°C) or degrees Fahrenheit (°F). When the temperature of a body or environment is higher than usual, it is said to be hot; when it is lower than usual, it is said to be cold.
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Answer:
c. makes nutrients more accessible to organisms
Explanation:
i took the test
give an example of false solution
An example of false solution is a natural gas.
What is Natural Gas?Natural gas is primarily methane with smaller quantities of other hydrocarbons.
It was formed millions of years ago when dead marine organisms sunk to the bottom of the ocean and were buried under deposits of sedimentary rock.
False solutions are those that do not actually address the problem at hand substantially but deceive people into believing that they do, while at the same time triggering other serious problems.
Examples of false solutions include:
clean development mechanisms; carbon markets; carbon capture and storage; burning trees and biomass as BioenergyTherefore, an example of false solution is a natural gas.
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Easy question find total charge in photo will rate 5 stars
The total charge on the atom is +1 and the correct option is option 3.
What is Bohr Model of atom?According to the Bohr Atomic model, a small positively charged nucleus is surrounded by revolving negatively charged electrons in fixed orbits.
He concluded that electron will have more energy if it is located away from the nucleus whereas electrons will have less energy if it located near the nucleus.
In a neutral atom, the number of protons is equal to the number of electrons.
Since, this atom has 11 protons and 10 electrons, thus there is one extra protons which gives it a +1 charge.
Therefore, the total charge on the atom is +1 and the correct option is option 3.
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Pls I need help urgently. What can be predicted about meniscus formation if the adhesion and cohesion forces were equal in the graduated cylinder?
Answer: Flat. The meniscus will be flat/neutral with no curves if adhesion and cohesion are equal.
HELP ME OUT PLEASEE
4. How many molecules are in 163.395g calcium hydroxide, Ca(OH)2?
5. How many moles of bromine are in 3.68 mol sulphur tetrabromide, SBr4?
According to concept of Avogadro's number and mole concept, there are 13.28×10²³ molecules and 14.72 moles respectively.
What is a mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
Number of molecules=163.395/74.09×6.023×10²³=13.281×10²³ molecules and number of moles= 3.68×4=14.72 moles.
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If you calculated 1.22 × 0.91, how many significant figures would be in the answer?
2
3
4
5
Answer: 2.
Explanation: Because, if you multiply 1.22 by 0.91 or .91, you’ll get 1.1102.
*If this answer doesn’t help, let me know so I can configure this.
Calcium Chloride Calcium chloride (CaCl₂) is a white solid soluble in water. It is the main constituent of several medicinal drugs used to treat calcium deficiency (low levels) in the human body. In agriculture, it is used to provide supplemental calcium to plants to delay their aging. 1. Pick out from the text, the use of calcium chloride in medication.
Answer:
Calcium chloride is used in medication to help treat people who have low levels of calcium in their body. It helps supplement the necessary amount of calcium needed for healthy functioning.Answer:
Calcium chloride is used in medication to help treat people who have low levels of calcium in their body. It helps supplement the necessary amount of calcium needed for healthy functioning.
Explanation:
Why is the temperature of the system increasing when there is plenty of ice still present?
Explanation:
The temperature of the system is increasing because the ice is melting and releasing energy in the form of heat. The energy released when the ice melts is greater than the energy needed to maintain the temperature of the system, causing the temperature to increase.
Describe the feedback loop involving water vapor and temperature. Is it positive or negative?
Answer:
The feedback loop involving water vapor and temperature is a positive feedback loop. As temperature increases, the amount of water vapor that can be held in the atmosphere also increases. This leads to an increase in the amount of water vapor in the atmosphere, which further amplifies the greenhouse effect and contributes to additional warming.
In other words, warmer temperatures lead to more water vapor in the atmosphere, which traps more heat, causing further warming, and so on. This positive feedback loop can amplify the initial warming effect caused by other factors such as greenhouse gas emissions or changes in solar radiation.
Conversely, if the temperature decreases, the amount of water vapor that can be held in the atmosphere decreases, which can lead to a decrease in the amount of water vapor present in the atmosphere, reducing the greenhouse effect and contributing to cooling. However, this negative feedback loop is weaker than the positive feedback loop described above, and it tends to be dominated by the positive feedback loop under most circumstances.
How to solve , how many grams of KI are in 25. 0 ml of a 3. 0%(m/v) KI solution
The grams of the KI are in the 25.0 ml of a 3.0 % m/v of the KI solution is 0.75 g.
The volume of the solution = 25 mL
The mass by volume of KI = 3 % m/v
The potassium iodide solution will contain the 3.0 g of the potassium iodide for the every 100 mL of the solution.
The amount of the KI in grams is as follows :
The mass of the KI in grams = (25 mL× 3 g ) / 100 mL
The mass of the KI in grams = 0.75 g
Thus, the amount of the KI in the grams is 0.75 g in the volume of the 25 mL.
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In what way can we play our role in the field of science? (as a student)
Which statement describes the formation of galaxies?
They begin in nebulas.
Heat and gases contract.
Gravity causes stars to cluster.
Dust and gases contract.
The statement that describes the formation of galaxies is "Gravity causes stars to cluster."
What is galaxies ?
Large systems of stars, gas, dust, and dark matter are known as galaxies, and they are bound together by gravity. These galaxies, which range in size from dwarf galaxies with only a few million stars to gigantic galaxies with trillions of stars, are the fundamental units of the universe.Spiral galaxies, elliptical galaxies, irregular galaxies, and lenticular galaxies are only a few of the different sizes and shapes of galaxies. The number and configuration of a galaxy's arms, the existence of a central bulge, and the quantity of interstellar gas and dust are only a few of the distinctive features that distinguish each type of galaxy from another.The statement that describes the formation of galaxies is "Gravity causes stars to cluster."
Galaxies form from the accumulation of gas, dust, and dark matter through the force of gravity. As the gas and dust in a galaxy cluster together, they begin to collapse under their own gravity, forming stars. Over time, these stars cluster together and form galaxies. Therefore, the correct statement that describes the formation of galaxies is gravity causes stars to cluster.
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reflection
about balancing chemical equation
and molecular wiegth and mollar mass
and molecular ratio and moles of molecules / atoms/
pwede nyo bang gawin Lahat Yan ng reflection
We know a balanced equation by counting the atoms of both sides of the reaction equation.
How do you balance chemical equation?It seems you are asking something about the balancing of chemical reaction equations and I will explain just that.
Balancing a chemical equation involves making sure that the number of atoms of each element on the reactant side of the equation is equal to the number of atoms of that element on the product side of the equation. Here are the steps to balance a chemical equation:
Write the chemical equation using the correct chemical formulas for the reactants and products.
Count the number of atoms of each element on the reactant side and the product side of the equation.
Identify the element that is not balanced.
Use coefficients (numbers in front of the chemical formulas) to balance the equation. Start with the element that appears in the fewest number of compounds and work your way up.
Double-check that the equation is balanced by counting the number of atoms of each element on both sides of the equation.
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Which is the correct assumption used to calculate the steady-state concentration of a pollutant in the lake, so that the concentration in the lake is equal to the one in the exit stream: group of answer choices the pollutant is conservative the lake is completely mixed steady- state conditions prevail first-order reaction kinetic no pollutant accumulation in the lake
The correct assumption used to calculate the steady-state concentration of a pollutant in the lake, so that the concentration in the lake is equal to the one in the exit stream is that the pollutant is conservative, meaning that it does not react or transform chemically in the lake or in the exit stream. This assumption allows for the use of mass balance equations to calculate the steady-state concentration of the pollutant based on the inflow and outflow rates, assuming that there is no accumulation of the pollutant in the lake. The other assumptions listed (completely mixed lake, steady-state conditions, first-order reaction kinetics) may also be relevant in certain cases, but the conservative pollutant assumption is the most fundamental and necessary one for the calculation of steady-state pollutant concentrations.
What is a key difference between chemical and nuclear reactions?
The key difference in between the chemical and the nuclear reactions is Chemical reaction will occurs outside the nucleus and the Nuclear reaction occurs inside the nucleus.
The Chemical reaction will normally occurs outside the nucleus. The Nuclear reaction will only occurs inside the nucleus. When the chemical reactions occur the elements will hold their identity and the nuclei of the atoms also be remains unchanged. During the nuclear reactions, the nuclei of the atoms will changes completely and the new elements are formed.
The chemical reactions will be balance in terms of the mass and the nuclear reaction will occurs in the terms of the mass and the energy.
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need this done quick
Explanation:
1a) c since c is the biggest part of the pie chart
1b) 25% as it is close to a quarter
quarter=25%
1c) A=10%
1d) I think Mr.M's class was difficult since 35% of people got decent grades (a and b). As that is a percentage less than half of the class i would consider that as a difficult class.
Hope this helped.
Use the equation for Boyle’s Law to calculate the following. (2pts)
A piston chamber, like a car engine, is filled with 2.00 L of nitrogen gas at 425kPa. The piston is compressed to a volume of 0.35 L.
What is now the pressure inside of the piston chamber? (Assume no gas leaked out).
According to the question the pressure inside the piston chamber is 2414.29 kPa.
What is pressure?Pressure is a measure of the force applied to a given area. It is usually expressed in terms of force per unit area such as pascals (Pa). Pressure is an important concept in physics and is used to describe a variety of phenomena in many areas of science. Pressure is most commonly used to describe the force applied by a gas or liquid on an object. The greater the pressure, the stronger the force. It can also be used to describe forces that are applied to a surface by a solid object. Pressure can be measured with a variety of instruments such as manometers, barometers, and pressure gauges.
The equation for Boyle's Law is P1V1=P2V2, where P1 is the original pressure, V1 is the original volume, P2 is the new pressure, and V2 is the new volume. Using this equation, we can calculate the new pressure, P2, as follows:
P2 = (P1V1)/V2
P2 = (425kPa * 2.00L) / 0.35L
P2 = 2414.29kPa
Therefore, the pressure inside the piston chamber is 2414.29kPa.
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What volume of a 0.500 M sodium chloride solution is required to make 500. mL of
a 0.100 M sodium chloride solution?
1L
100 L
0.100 L
0.100 ml
Explanation:
Refer to pic..... .. .....
Given the volume of the 0.500 M sodium chloride solution is 500 mL. Then, the volume of 0.100 M sodium chloride solution is 2500 ml.
What is molarity ?Molarity of a solution is the ratio of its number of moles of solute to the volume of solution in liters. It is the common term to express the concentration of a solution.
The product of molarity and volume then being the number of moles of solute in the solution. Let V1 and M1 be the volume of molarity of a solution and V2 and M2 be the volume and concentration of the diluted solution.
then,
M1 V1 = M2 V2
Given,
M1 = 0.500 M
V1 = 500 mL
M2 = 0.100 M
then V2 = M1 V1/ M2
V2 = 0.500 M × 500 ml /0.100 M
= 2500 ml.
Therefore, the volume of the diluted solution is 2500 ml.
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PLEASE HELP
How many liters of CO2 are produced when 48.92g CaCO3 decomposes?
Explanation:
OK thank you so much I hope you are well
Methane gas combusts according to the following chemical
equation:
CHA(g) + 202(g) -› CO2(g) + 2H,0(1)
29.2 L of methane gas is combusted with 63.3 L of oxygen
gas at STP. What volume of carbon dioxide is produced in the
reaction?
L CO2
Your answer should be rounded to three significant figures. Do not Include
units In your answer.
Answer:
From the balanced chemical equation, we know that 1 mole of methane reacts with 2 moles of oxygen gas to produce 1 mole of carbon dioxide and 2 moles of water vapor. At STP (standard temperature and pressure, 0°C and 1 atm), 1 mole of gas occupies 22.4 L of volume.
First, we need to determine how many moles of methane and oxygen are involved in the reaction. Since the volumes of gases are given at STP, we can use the ideal gas law:
n = PV/RT
where n is the number of moles of gas, P is the pressure, V is the volume, R is the gas constant, and T is the temperature. At STP, the pressure is 1 atm and the temperature is 0°C or 273 K. Therefore, we have:
n(CH4) = (29.2 L)(1 atm)/(0.0821 L·atm/mol·K)(273 K) ≈ 1.15 mol
n(O2) = (63.3 L)(1 atm)/(0.0821 L·atm/mol·K)(273 K) ≈ 2.49 mol
From the balanced chemical equation, we know that 1 mole of methane produces 1 mole of carbon dioxide. Therefore, we can determine the volume of carbon dioxide produced using the ideal gas law:
V(CO2) = n(CO2)RT/P
where V is the volume, n is the number of moles, R is the gas constant, T is the temperature, and P is the pressure. At STP, the pressure is 1 atm and the temperature is 0°C or 273 K. Therefore, we have:
V(CO2) = (1.15 mol)(0.0821 L·atm/mol·K)(273 K)/(1 atm) ≈ 26.7 L
Therefore, approximately 26.7 L of carbon dioxide gas is produced in the reaction.
4Al + 3O2 -> 2Al203
How many Liters of oxygen gas at STP are required to react with 2.00 moles of aluminum?
Explanation:
Refer to picture above.........
reflection
about balancing chemical equation
and molecular wiegth and mollar mass
and molecular ratio and moles of molecules / atoms/
pwede nyo bang gawin Lahat Yan ng reflection
Answer:
The chemical equation for this reaction above would be written as: 2 H 2 ( g) + O 2 ( g ) → 2 H 2 O ( g )
Explanation:
What is the formula (length)x(width)x(height) used for? a The formula for finding the density b The formula for finding the volume c The formula for finding the mass
To determine the density of a solid that has regular side lengths, it is first needed to calculate the volume of the solid using the equation volume = length x width x height option b)
What is density with example?density is the bulk of a solid component per unit volume. d = M/V, where d is density, M is mass, and V is volume, is the expression for density. Grams per cubic centimetre are a standard unit of measurement for density.
For example, the density of water is 1 gramme per cubic centimetre, and Earth's density is 5.51 grammes per cubic centimetre. Another way to state density is in kilos per cubic metre (in metre-kilogram-second or SI units).
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How many moles of KNO3 would have to be added to 100g of water to form a saturated solution at 10C?
We need to add 0.316 moles of KNO3 to 100g of water to form a saturated solution at 10°C.
How to determine the number of moles would have to be added ?
To determine how many moles of KNO3 would have to be added to 100g of water to form a saturated solution at 10°C, we need to know the solubility of KNO3 at this temperature.
According to the solubility data, the solubility of KNO3 at 10°C is approximately 32 grams per 100 grams of water.
So, to make a saturated solution at 10°C, we need to add 32 grams of KNO3 to 100 grams of water.
Now, we can calculate the number of moles of KNO3 needed using its molar mass :
Molar mass of KNO3 = 101.1 g/mol
Number of moles of KNO3 = mass of KNO3 / molar mass of KNO3
Number of moles of KNO3 = 32 g / 101.1 g/mol
Number of moles of KNO3 = 0.316 moles
Therefore, we need to add 0.316 moles of KNO3 to 100g of water to form a saturated solution at 10°C.
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Which of the following is NOT a safety precaution for handling radioactive material?
A. Store radioactive material in a shielded container.
B. Remove all metal before entering the containment room.
C. Use tongs or robotic arms to handle materials.
D. Monitor exposure with a film dose bandage.
The option which is not a safety precaution for handling Radioactive material is option B. Remove all metal before entering the containment room.
Radioactive substances are those which have an unstable nucleus. They achieve stability by emitting radiations like alpha particles, beta particles and gamma rays.
Working or experimenting on such substances can pose serious health risks like cancer, cardiovascular diseases etc.
Therefore following strict safety precautions while handling radioactive material is mandatory.
Certain safety measure could include
1) Protect the skin from radiation exposure by using film bandages.
2) When the radioactive sample is not in use, store them in a shielded container right away.
3) Always use gloves, tongs or remote operated robotic arms to handle the samples.
4) Do not eat, drink, smoke, or apply cosmetics in the laboratory.
5) Wear disposable clothes to reduce the risk of contamination from the samples.
Therefore, The option which is not a safety precaution for handling Radioactive material is option B. Remove all metal before entering the containment room.
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Calculate the mass of oxygen gas formed when 10g of potassium trioxocarbonate (vi) is heated strongly. (K= 39, O=16, N=14)
One mole of potassium carbonate decompose to give one mole or 32 g of oxygen. Hence, 10 g of potassium carbonate will give 2.31 g of oxygen gas.
What is decomposition reaction?Decomposition is type of reaction in which the one compound breaks into its constituent elements and compounds. Potassium carbonate is an ionic compound which can decomposed on heating to given CO and oxygen gas as follows:
[tex]\rm K_{2}CO_{3} \rightarrow 2 K + O_{2} + CO[/tex]
As per this balanced chemical equation of the decomposition, one mole of potassium carbonate produces one mole of oxygen gas.
molar mass of potassium carbonate = 138 g/mol
molecular mass of O₂ = 32 g/mol
Hence, 138 g of potassium carbonate gives 32 g of oxygen gas. Then, 10 g of potassium carbonate will give
(10 × 32)/138 = 2.31 g.
Therefore, the mass of oxygen formed from 10 g of potassium carbonate will be 2.31 g.
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A student mixed 24.5 g of magnesium bromide with 8.67 x 1022 molecules of hydroiodic acid... They recovered 8.23 g of acid. What is the percent yield?
Explanation:
Refer to pic............
17. How many joules of heat are absorbed to raise the
temperature of 435 grams of water at 1 atm from
25°C to its boiling point, 100.°C?
A) 4.5 X 10^4 J
C) 2.5 X 10^7 J
B) 1.4 X 10^5 J
D) 7.4 X 10^7 J
The amount of heat absorbed to raise the temperature of 435 grams of water at 1 atm from 25°C to its boiling point, 100°C, is approximately 1.4 × 10^5 joules
What is specific heat?
Specific heat is the amount of heat energy required to raise the temperature of a substance by one unit of temperature per unit of mass. It is a physical property that helps to characterize a substance and is typically measured in units of joules per gram per degree Celsius (J/g°C) or calories per gram per degree Celsius (cal/g°C).
The amount of heat absorbed to raise the temperature of a substance can be calculated using the formula:
Q = mcΔT
where Q is the amount of heat absorbed (in joules), m is the mass of the substance (in kilograms), c is the specific heat capacity of the substance (in joules per kilogram per degree Celsius), and ΔT is the change in temperature (in degrees Celsius).
Substituting the given values, we get:
m = 435 grams = 0.435 kg
ΔT = 100°C - 25°C = 75°C
The specific heat capacity of water is 4.184 J/g°C. We can convert this to joules per kilogram per degree Celsius (J/kg°C) by dividing by 1000:
c = 4.184 J/g°C ÷ 1000 = 4.184 J/kg°C
Substituting these values, we get:
Q = (0.435 kg) × (4.184 J/kg°C) × (75°C)
Q = 140,089.2 J
Therefore, the amount of heat absorbed to raise the temperature of 435 grams of water at 1 atm from 25°C to its boiling point, 100°C, is approximately 1.4 × 10^5 joules. The answer closest to this value is option (B).
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You have a balloon filled with carbon dioxide gas as STP. The balloon’s volume is 2.8L. how many molecules are in it?
52×1022 molecules =2×7. 52×1022=15×1022.
= 15,330
What is the specific rotation of (R)-(-)-monosodium glutamate
The specific rotation of a substance is a measure of its ability to rotate the plane of polarized light. It is usually denoted by the symbol [α] and is expressed in degrees per unit length and concentration.
The specific rotation of (R)-(-)-monosodium glutamate is -2.4° (or -2.4 degrees) when measured in a 1-decimeter cell at a concentration of 10 g/100 mL in water. The negative sign indicates that the rotation is counterclockwise or left-handed, which is typical for most amino acids.
Note that the specific rotation of a substance can vary depending on the wavelength of light used and the temperature at which the measurement is taken. Therefore, it is important to specify these parameters when reporting the specific rotation of a substance.
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How many grams of solute are present in 585 mL of 0. 610 M KBr?
mass of solute:
The grams of solute present in 585 mL of 0. 610 M KBr is given by Mass of solute = 42.46 g KBr.
The total number of moles of solute per litre of solution is defined as the molarity of a specific solution. Because, unlike mass, the volume of a system changes with changes in physical circumstances of the system, the molality of a solution is reliant on changes in physical qualities of the system such as pressure and temperature. M, which stands for molarity, represents molarity.
M = 0.610 and V = 585mL = 0.585 L
Molarity is given by,
M = mol/V
M is molarity.
mol is moles of solute.
V is volume of solution in liters.
we need to determine moles so,
0.610 = mol / 0.585
mol = 0.35685 mol KBr
We must now convert this mole quantity to mass. KBr has a molar mass of 39.098 g/mol + 79.904 g/ mol = 119.002 g / mol.
0.3568 x 119.002 = 42.46 g KBr.
So, the mass of solute is 42.46 g KBr.
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