Crossbreeding in agriculture involves combining two plants to create a new variety with improved traits by using traditional breeding techniques or modern genetic engineering to produce GMOs.So the correcct option is A.
Explanation:When engineers increase output through crossbreeding, they are combining two plants so that each plant's strengths compensate for the other's weaknesses. This is a method that has been employed to develop new crop varieties with desirable traits such as disease resistance, better nutritional value, and improved shelf-life. Crossbreeding can involve traditional breeding techniques with closely related species or could be done through modern biotechnology practices - creating genetically modified organisms (GMOs), where specific genes are introduced to give the crop beneficial traits like herbicide resistance, better taste, or drought tolerance.
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The mass of the electron is
about equal to the neutron.
almost the same as the proton.
very small compared to the proton.
very large compared to the neutron.
light
2:21
Tools
is a chemical released at a stressful time.
Oxygen
Glucose
Carbon dioxide
Adrenaline
Answer:
carbon dioxide
Explanation:
Answer:
Adrenaline
Explanation:
Adrenaline is a chemical released when you are in stress or, to coin it better, in "panic mode". It helps boost your stamina, and gears you towards flight in the fight v. flight response. However, when needed, you have that extra boost of stamina in case you do need to fight. Your blood pressure will rise, and your heart will beat faster, as well as you feeling your muscles tense up and body heating up.
A helium filled balloon has a volume of 2.48L and a pressure of 150kpa the volume of the balloon increases to 2.98L what is the new pressure of the helium gas
Answer:
THE NEW PRESSURE OF THE HELIUM GAS IS 124kPa AFTER THE VOLUME WAS INCREASED FROM 2.48 L TO 2.98 L
Explanation:
Using Boyle's law which states that at constant temperature, the pressure of a given gas is inversely proportional to the volume occupied by the gas.
Mathematically,
P1 V1 = P2 V2
P1 = 150 kPa = 150 * 10^3 Pa
V1 = 2.48 L
V2 = 2.98 L
P2 = ?
Rearranging the formula making P2 the subject of the equation, we obtain;
P2 = P1 V1 / V2
P2 = 150 * 10^3 * 2.48 / 2.98
P2 = 372 * 10 ^3 / 2.98
P2 = 124.83 * 10^3 Pa or 124.8kPa
In other words, the new pressure of the helium gas after its volume was increased from 2.48 L to 2.98 L is 124.8kPa.
Which of the following describes a boiling point?
A. Phase change from a solid to a liquid occurring at a specific
temperature and pressure
B. Phase change from a liquid to a gas occurring at a specific
temperature and pressure
c. Phase change from a gas to a liquid occurring at a specific
temperature and pressure
D. Phase change from a solid to a gas occurring at a specific
temperature and pressure
Answer:
Phase change from a liquid to a gas occurring at a specific temperature and pressure
Explanation:
Boiling is a physical process in which a substance changes its state from liquid to vapor state.
In this context ,boiling point is the threshold temperature at which changes of state from liquid to vapor occurs. The boiling point also depends upon atmospheric pressure of environment as well. For the same substance, boiling point at two different pressure will differ significantly.
For example : Boiling point of water at sea level is 100 degree Celsius
while at 6,250 ft , Boiling point of water is 93.4 degree Celsius.
Based on above discussion option B Phase change from a liquid to a gas occurring at a specific temperature and pressure is the correct answer.
Answer: B) Phase change from a liquid to a gas occurring at a specific temperature and pressure.
In your own words, describe how a hurricane forms. (5 points)
Calculate the mass of a liquid with a density of 2.5 g/mL and a volume of 15 mL.
Answer: 37.5g
Explanation:
To find mass you need to multiply density times volume
M=D*V
m=2.5*15
m=37.5g(only grams)
Here is something to help
Density=Mass/Volume
Volume=Mass/Density
Mass=Density*Volume
The mass of a liquid with a density of 2.5 g/mL and a volume of 15 mL is 37.5 g.
What is Density?Density may be defined as a type of physical property that significantly deals with the description of how much space an object or substance takes up with respect to the amount of matter in that object or substance.
In a more simple sense, it is characterized as the measurement of quantity or mass per unit of volume in a particular substance.
According to the question,
The mass of a liquid = ?
The volume of a liquid = 15mL.
The density of the liquid = 2.5 g/mL.
According to the formula,
Density = Mass/VolumeMass = Density × Volume = 2.5 × 15 = 37.5 g.Therefore, the mass of a liquid with a density of 2.5 g/mL and a volume of 15 mL is 37.5 g.
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How can carbon dioxide be considered a pollutant when it is a natural component of air?
a Carbon dioxide is considered a pollutant even though it is a natural component of air, because it is
harmful to all living organisms
b Carbon dioxide is considered a pollutant when larger concentrations than normal are present in the
air as a result of human activity
Carbon dioxide is considered a pollutant, because it forms harmful chemicals when mixed with
other pollutants in the air
d. Carbon dioxide cannot be considered a pollutant under any circumstances
Please select the best answer from the choices provided
OA
ОВ
OC
OD
ASAP PLEASE
Calculate the heat needed to increase the temperature of 100. g water from 45.7 C to 103.5 C.
ΔHvaporization= 2260 J/g
Ch2o=1.90 J/g (gas)
Ch2o=4.18 J/g C (liquid)
Answer:
Total heat required to raise the temperature of water from 45.7°C to 103.5°C
= 249,362.4 J
Explanation:
The Heat required to raise the temperature of 100.0 g of water from 45.7°C to 103.5°C will be a sum of;
- The heat required to raise the 100 g of water from 45.7°C to water's boiling point of 100°C
- The Heat required to vaporize the 100 g of water at its boiling point
- The Heat required to raise the temperature of this vapour from 100°C to 103.5°C
1) The heat required to raise the 100 g of water from 45.7°C to water's boiling point of 100°C
Q = mCΔT
m = 100 g
C = 4.18 J/g.°C
ΔT = change in temperature = (100 - 45.7) = 54.3°C
Q = 100 × 4.18 × 54.3 = 22,697.4 J
2) The Heat required to vaporize the 100 g of water at its boiling point
Q = mL
m = 100 g
L = ΔHvaporization = 2260 J/g
Q = mL = 100 × 2260 = 226,000 J
3) The Heat required to raise the temperature of this vapour from 100°C to 103.5°C
Q = mCΔT
m = 100 g
C = 1.90 J/g.°C
ΔT = change in temperature = (103.5 - 100) = 3.5°C
Q = 100 × 1.9 × 3.5 = 665 J
Total heat required to raise the temperature of water from 45.7°C to 103.5°C
= 22,697.4 + 226,000 + 665
= 249,362.4 J
Hope this Helps!!!
Answer:
249362.4 J
Explanation:
The following were Data were obtained from the question:
Mass (M) = 100g
Initial temperature (T1) = 45.7°C
Final temperature (T2) = 103.5°C
Heat of vaporisation (ΔHv) = 2260 J/g
Specific heat capacity (C) of steam = 1.90 J/g
Specific heat capacity (C) of water = 4.18 J/g
To calculate the heat needed to increase the temperature of water from 45.7°C to 103.5°C, the following must be observed:
Step 1:
Determination of the heat needed to raise the temperature of water from
45.7°C to its boiling point 100°C.
This is illustrated below:
Mass (M) = 100g
Initial temperature (T1) = 45.7°C
Final temperature (T2) = 100°C
Specific heat capacity (C) of water = 4.18 J/g
Change in temperature (ΔT) = T2 – T1 = 100°C – 45.7°C = 54.3°C
Heat (Q1) =?
Q = MCΔT
Q1 = 100 x 4.18 x 54.3
Q1 = 22697.4 J
Step 2:
Determination of the heat needed to vaporise 100g of water.
This is illustrated below:
Mass (M) = 100g
Heat of vaporisation (ΔHv) = 2260 J/g
Heat (Q2) =?
Q2 = MΔHv
Q2 = 100 x 2260
Q2 = 226000 J
Step 3:
Determination of the heat needed to raise the temperature of steam from 100°C to 103.5°C.
This is illustrated below:
Mass (M) = 100g
Initial temperature (T1) = 100°C
Final temperature (T2) = 103.5°C
Specific heat capacity (C) of steam = 1.90 J/g
Change in temperature (ΔT) = T2 – T1 = 103.5°C – 100°C = 3.5°C
Heat (Q3) =?
Q3 = MCΔT
Q3 = 100 x 1.9 x 3.5
Q3 = 665 J
Step 4:
Determination of the overall heat needed.
This is simply obtained by adding all the heat calculated above. This is illustrated:
QT = Q1 + Q2 + Q3
Q1 = 22697.4 J
Q2 = 226000 J
Q3 = 665 J
Total heat (QT) =..?
QT = Q1 + Q2 + Q3
QT = 22697.4 + 226000 + 665
QT = 249362.4 J
Therefore, the heat needed to increase the temperature of 100g of water from 45.7°C to 103.5°C is 249362.4 J
List 3 things that happen at the endpoint or equivalence point.
The equivalence point is the point in a titration where the amount of titrant added is enough to completely neutralize the analyte solution. The moles of titrant (standard solution) equal the moles of the solution with unknown concentration. ... The equivalence point is not the same as the endpoint of a titration.
What objects do magnets stick to?
Answer:magnets, iron, cobalt, nickel, steel (because it is mostly iron), manganese, gadolinium and lodestone.
Explanation:
Hope I helped
1.
The ___________ energy in a mechanical system is determined by adding the potential and kinetic energy together.
total
massive
2.
The initial ___________ energy is equal to zero because the starting point is set at zero height to make things easier.
kinetic
potential
3.
In the example, the final kinetic energy is determined to be ___________ because at the peak height, the ball instantaneously stops.
positive
zero
negative
4.
In this system, potential and kinetic energy are ________________ proportional.
inversely
directly
Answer:
1. total
2. potential
3. zero
4. inversely
Explanation:
The total energy in a mechanical system is determined by adding the potential and kinetic energy together. The initial potential energy is equal to zero because the starting point is set at zero height to make things easier.
What is mechanical energy ?The sum of kinetic energy and potential energy in an object is called its mechanical energy. Therefore, the first statement is completed as:
The total energy in a mechanical system is determined by adding the potential and kinetic energy together.
The initial potential energy is equal to zero because the starting point is set at zero height to make things easier. In the example, the final kinetic energy is determined to be zero because at the peak height, the ball instantaneously stops.
In this system, potential and kinetic energy are inversely proportional to each other. Because, as the kinetic energy increases with a decrease in potential energy.
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Some plant seeds are adapted to sprout with a limited amount of water. For what environmental change are these seeds most likely adapted? earthquake tsunami drought global warming
Answer:
drought
Explanation:
In an ecosystem, some plant seeds are adapted to sprout with a limited amount of water. They are adapted to drought.
What is an ecosystem?
Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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Why do we not see a lunar
and solar eclipse every
month
A. The moon orbits around Earth at a different angle than the Earth orbits around the Sun
B. The moon takes longer than 1 month to
orbit
C. Mars interferes with the alignment of the
moon, Earth and Sun
D. All of the above
Answer:
The moon's path around Earth is tilted compared to Earth's orbit around the sun. The moon can be behind Earth but still get hit by light from the sun. In this diagram, you can see that the moon's orbit around Earth is at a tilt. This is why we don't get a lunar eclipse every month.
So, I think it is A.
Explanation:
I hope that helps. I don't know if it is right or wrong, but good luck :)
why are viruses (specifically) so dangerous?
Answer:
Over 700,000 lives are taken by the AIDs virus every year. Hepatitis C claims the lives of over 200,000 people each year and haemorrhagic fevers caused by viruses such as Ebola have resulted in over 20,000 deaths.
Explanation:
A sample of gas starts at 1.00 atm, 0.00 degrees Celsius, and 30.0 mL. What is the volume if the temperature increases to 27.0 degrees Celsius and the pressure increases to 2 atm?
Answer:
16.48mL
Explanation:
The following data were obtained from the question:
Initial pressure (P1) = 1 atm
Initial temperature (T1) = 0°C = 0°C + 273 = 273K
Initial volume (V1) = 30mL
Final temperature (T2) = 27°C = 27°C + 273 = 300K
Final pressure (P2) = 2atm
Final volume (V2) =..?
Applying the general gas equation, the final volume of the gas can be obtained as follow:
P1V1/T1 = P2V2/T2
1 x 30/273 = 2 x V2/300
Cross multiply to express in linear form
273 x 2 x V2 = 30 x 300
Divide both side by 273 x 2
V2 = (30 x 300)/(273 x 2)
V2 = 16.48mL
Therefore, the new volume of the gas is 16.48mL
The volume of a sample of gas that starts at 1.00 atm, 0.00 degrees celsius, and 30.0 mL is 16.48mL. Details about volume can be found below..
How to calculate volume?The volume of an ideal gas can be calculated by using the following formula:
P1V1/T1 = P2V2/T2
Where;
P1 = initial pressureP2 = final pressureT1 = initial temperatureV1 = initial volumeV2 = final volumeT2 = final temperature1 × 30/273 = 2 × V2/300
0.109 = 2V2/300
32.97 = 2V2
V2 = 16.48mL
Therefore, the volume of a sample of gas that starts at 1.00 atm, 0.00 degrees celsius, and 30.0 mL is 16.48mL.
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What is the mass percent of Iron in Iron III Carbonate? *
Answer:
what im lost
Explanation:
Final answer:
The mass percent of iron in Iron (III) Carbonate is calculated by dividing the molar mass of iron by the total molar mass of the compound and then multiplying by 100%, resulting in approximately 38.3%.
Explanation:
To find the mass percent of Iron in Iron (III) Carbonate (Fe₂(CO₃)₃), we first need to calculate the molar mass of the compound and then the molar mass of iron within it. The molar mass of Iron (III) Carbonate is obtained by adding together the molar masses of 2 moles of iron (Fe), 3 moles of carbon (C), and 9 moles of oxygen (O). The molar mass of Fe is approximately 55.85 g/mol, that of C is about 12.01 g/mol, and O is approximately 16.00 g/mol.
To calculate the molar mass of Fe₂(CO₃)₃:
Molar mass of Fe: 2 × 55.85 g/mol = 111.7 g/molMolar mass of C: 3 × 12.01 g/mol = 36.03 g/molMolar mass of O: 9 × 16.00 g/mol = 144 g/molTotal molar mass = 111.7 g/mol + 36.03 g/mol + 144 g/mol = 291.73 g/mol
Next, we find the mass percent of Fe by taking the molar mass of Fe and dividing it by the total molar mass of the compound, then multiplying by 100% to convert it into a percentage:
Mass percent of Fe = (Molar mass of Fe / Total molar mass of compound) × 100% = (111.7 g/mol / 291.73 g/mol) × 100% ≈ 38.29%
Therefore, the mass percent of iron in Iron (III) Carbonate to three significant digits is approximately 38.3%.
What color on the pH paper indicates that an acid has formed?
Answer:
red
Blue litmus paper turns red under acidic condition
Explanation:
Answer: Acidic Ph Levels: Lime green, yellow, orangle, and red
Explanation:
Alkaine Ph Levels: Purple, blue, and light green.
Neutral Ph Level: A bright green.
Acidic Ph Levels: Lime green, yellow, orangle, and red
Therefore, once the Ph paper indicates if the color is lime green, yellow, orangle, or red then that means it's acidic.
I hope this helps!
To measure temperature scientists used?
Describe how molarity can be used in stoichiometry calculations
Answer:
The stoichiometric coefficients in your balanced chemical equation can represent molecules or moles or molarity.
When you balance an equation, you can use the coefficients to determine the quantity of either products or reactants. If the reaction occurs in water, then you can either do the conversion from reactants to products using moles or molarity.
Explanation:
For example, if you have a 1.5M solution of H2SO4, then the concentration of SO4-2 in solution can be determined by the balanced dissociation equation H2SO4 = 2H+ + SO4-2.
1.5M H2SO4(1M SO4-2/1M H2SO4) = 1.5 M SO4-2
Final answer:
Molarity is a key conversion factor in stoichiometry that relates the amount of a solute in moles to the volume of solution, facilitating calculations involving solution concentrations and chemical reactions.
Explanation:
Molarity can be used in stoichiometry calculations to determine quantities in chemical reactions. When dealing with stoichiometry problems involving solutions, molarity serves as a direct conversion factor because it is based on the mole unit. For instance, consider the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH):
HCl(aq) + NaOH(s) → H₂O(l) + NaCl(aq)
Convert the mass of NaOH to moles using its molar mass.Use the balanced chemical equation to find the molar ratio between NaOH and HCl.Convert the moles of NaOH to moles of HCl using this ratio.Finally, use the molarity of the HCl solution (moles per liter) to find the volume of HCl needed to react with the given amount of NaOH.To find out how many liters of aqueous HCl will react with a given mass of NaOH, we perform the following steps:
Note that the molarity acts as a bridge between the amount of solute (HCl) and the volume of the solution.
Which value gives the number of particles in 1 mol of a substance? 6.02 Times. 1021 6.02 Times. 1022 6.02 Times. 1023 6.02 Times. 1024
Answer:
6.02 x10^23
Explanation:
just did it on edge
The value gives the number of particles in 1 mol of a substance is 6.02 Times. 1023. Therefore, option C is correct.
What is mol ?The International System of Units uses the mole (symbol: mol) as the unit of material quantity. How many elementary entities of a particular substance are present in an object or sample is determined by the quantity of that material. It is specified that the mole contains exactly 6.022 * 1023 elementary entities.
The mole, often known as mol, is a SI unit that counts the particles in a given substance.One mole is equal to 6.02214179×1023 atoms, or other elementary units such as molecules.
Avogadro's number is another name for this number. Keep in mind that a mole is defined as a quantity of stuff. A mole is the amount (10) of material containing 6.02214 × 1023 particles. 1 mol = 6.02214 × 1023 particles.
Thus, option C is correct.
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If the reactants have a potential energy of 10.2 kJ/mol and the products have a potential energy of 15.7 kJ/mol, what is ΔH?
Answer:
your answer
Explanation:
Which is NOT one way used to collect empirical evidence?
A. Sight
B. Taste
C. Extra sensory perception
D. Hearing
Final answer:
Extra sensory perception is not a method used to collect empirical evidence. Empirical data is typically gathered using the five senses: hearing, sight, taste, touch, and smell.
Explanation:
The correct answer to the question of which method is NOT used to collect empirical evidence is C. Extra sensory perception. Empirical evidence is data and information obtained through observation and experimentation, and is typically gathered using the five senses: hearing, sight, taste, touch, and smell. Each of these senses provides a different type of sensory input or information about the world around us, enhancing our understanding and facilitating the collection of empirical data. For example, sound information through hearing can be used to perceive and analyze waves, taste information helps in food and chemical analysis, while smell information plays a role in the detection of substances. Extra sensory perception, however, is not a scientifically recognized or reliable method for collecting empirical evidence.
Think about the systems around you for example you’re reading this text on a computer system write definition for the word system
Answer:
A system is a group of related parts that work together as a whole.
Explanation:
edmentum.
A system is a set of interacting elements regarded as a distinctive entity for the purpose of study or observation. It can be physical like planets in a solar system, abstract like the systems operating in a computer, or organic like our nervous system.
Explanation:A system can be defined as a set of elements that interact with each other and can be considered as a single entity, often for the purpose of study or analysis. This grouping can be physical, such as planets in a solar system, or conceptual, like the motor and visual systems in the human body. Systems, whether isolated, closed, or open, abide by certain laws, including conservation laws. Isolated and closed systems have minimal interactions with their environment, while open systems can exchange energy and/or matter with their surroundings.
Examples of systems can be seen everywhere, from how your computer operates as a system, to natural systems such as your nervous system processing sensory information and controlling your body's functions.
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I NEED HELP NOW YOU CAN TAKE ALL MY POINTS JUST PLEASE ANSWER AND MAKE SURE ITS GOOD!!!!!
Below is a solubility curve to help you answer the following questions.
Another student is attempting to make a saturated solution of KCl. The student added 30 g of KCl to 100 g of water at 60℃. What more does the student need to do to create a saturated KCl solution?
Claim: What more does the student need to do to create a saturated KCl solution?
Evidence: Use data from the solubility curve to identify the number of grams of KCl needed at 60℃ to create a saturated solution.
Reasoning: Use your knowledge of the relationship between temperature and solubility to explain how you determined the saturation level of the solution at the given temperature. Be sure to define the terms you used.
As the temperature is increased, the solubility of potassium chloride will increase as they are directly proportional.
What is solubility?Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.
The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.
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What is Mitosis (no plagiarism)
a sort of cell division that outcomes in two girl cells each having indistinguishable number and sort of chromosomes from the parent core, average of conventional tissue development.
Answer:
Mitosis is a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
Mitosis is also the basis for healing wounds and fighting off invading pathogens that cause sickness. Certain organisms lose millions of cells per day as part of their normal function. Mitosis allows old cells to be replaced by new ones, ensuring an army of fully functioning cells.
(Hope this helps) Sky
What must occur in order for a gas-discharge lamp to produce light?
A healthy breakfast supplies 230.000 calories how many joules is that same breakfast? 4.18
Joules i calone
Since 4.184 Joules equals one calorie, simply we need to make a cross multiply equation.
4.184J/1cal=x J/230000cal
Then we can multiply the crosses and set them equal to each other. 4.184(230000)=1x
962320=x
The healthy breakfast supplies 962320 joules worth of food.
(PLEASE HELP IMMEDIATELY)How are total
lunar eclipses and partial
lunar eclipses similar?
Answer:
Explanation:
They both have the same effect just one is whole and the other is half
Need some help with these problems
b. a 0.5 M solution containing 250 g of manganese (II) chloride (MnCl2)
c. a 0.4 M solution containing 290 g of aluminum nitrate (Al(NO3)3)
complete question:
Calculate the volume of each solution, in liters.
b. a 0.5 M solution containing 250 g of manganese (II) chloride (MnCl₂)
c. a 0.4 M solution containing 290 g of aluminum nitrate (Al(NO₃)₃)
Answer:
b. L ≈ 4.00 litres
c. L ≈ 3.4 litres
Explanation:
Molarity is the number of moles of solute per litre of solution. Together a solute and a solvent makes a solution. The formula for molarity can be represented below
M = number of moles of the solute(mol)/L
where
M = molarity
mol = number of moles of the solute
L = litre of the solution.
Therefore ,
The volume of each solution can be computed below
b. a 0.5 M solution containing 250 g of manganese (II) chloride (MnCl₂)
M = number of moles of the solute(mol)/L
number of moles of MnCl₂ = mass/molar mass
molar mass of MnCl₂ = 55 + 71 = 126 g/mol
number of moles of MnCl₂ = 250/126
number of moles of MnCl₂ = 1.9841 moles
0.5 = 1.9841/L
cross multiply
0.5L = 1.9841
L = 1.9841/0.5
L = 3.97
L ≈ 4.00 litres
c. a 0.4 M solution containing 290 g of aluminum nitrate Al(NO₃)₃
M = number of moles of the solute(mol)/L
number of moles = mass/molar mass
molar mass of Al(NO₃)₃ = 27 + 14 × 3 + 48 × 3 = 27 + 42 + 144 = 213
number of moles = 290/213 = 1.3615 moles
M = number of moles of the solute(mol)/L
0.4 = 1.3615/L
cross multiply
0.4L = 1.3615
divide both sides by 0.4
L = 1.3615/0.4
L = 3.4 litres
When humans burn fossil fuels, most of the carbon quickly enters the_______
as carbon dioxide.
•hydrosphere
•atmosphere
•geosphere
•biosphere
Answer:
Atmosphere.
Explanation:
Carbon moves from fossil fuels to the atmosphere when fuels are burned. When humans burn fossil fuels to power factories, power plants, cars and trucks, most of the carbon quickly enters the atmosphere as carbon dioxide gas.