Answers
Answer:
2 and 3 is the answer because Methane is emitted from a variety of anthropogenic (human-influenced) and natural sources. Anthropogenic emission sources include landfills, oil and natural gas systems, agricultural activities, coal mining, stationary and mobile combustion, wastewater treatment, and certain industrial processes
Related Questions
7th grade Sem 1
13.2.6 Quiz: Chemistry of Life
Question 3 of 5
Which substance used during photosynthesis does a plant take in from the
soll?
A. Water
O
B. Sugars
C. Proteins
D. Oxygen
SUBMIT
Answers
Answer: Water
Explanation: During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil
at a fixed temperature and pressure, a cylinder contains equal volumes of o2 and an unknown gas, weighing 20.0 g and 17.5 g respectively. what is the identity of the unknown gas?
Answers
At a fixed temperature and pressure, a cylinder contains equal volumes of O2 and an unknown gas. The identity of the unknown gas CO.
The number of moles of a given substance is calculated by dividing the mass by the molar mass.
The number of moles of O₂ = [tex]\mathbf{=\dfrac{20.0 \ g}{32 \ g/mol}}[/tex]
= 0.625 moles.
Based on the given assumption, at fixed temperature and pressure;
Let assume that the number of moles of the unknown gas is = 0.625 molesThe molar mass of the unknown gas can be estimated as:
[tex]\mathbf{= \dfrac{mass}{number \ of \ moles}}[/tex]
[tex]\mathbf{= \dfrac{17.5 \ g}{0.625 \ moles}}[/tex]
= 28 g/mol
Therefore, we can conclude that the unknown gas is CO.
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if one mole of na3po4·3h2o is heated extensively, how many moles of water are released?
Answers
When one mole of Na3PO4.3H2O is heated extensively, three moles of water are released.
The water molecules in Na3PO4.3H2O are called molecules of water of crystallization. These molecules are not covalently bonded to the Na3PO4 molecule. They are only loosely attached to the substance.
Strong heating will drive away these molecules of water of crystallization to give three moles of water in the product.
Hence, when one mole of Na3PO4.3H2O is heated extensively, three moles of water are released.
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why is it important to use deionized water in an experiment
Answers
because it removes all of the charged ions in the water, making it safe to mix into medications
Please answer with the correct answer <3
Substances can be categorized in two ways, as an (element, mixture or compound) or as a (solid,liquid or gas). Which of these methods are of most use to a chemist?
Answers
As a chemist, the classification of substances as elements, mixtures, or compounds is of more importance than the state of the substances.
Classification of substancesThe state of substances is mostly obvious to the eyes, even to those that are not chemists. In other words, the state of matter of substances is just a physical property that can be easily discerned.
Whether a substance is an element, mixture, or compound, however, is something that may not be discerned physically without carrying out some chemical analyses.
Thus, a chemist would be more interested in the classification of substances as elements, compounds, or mixtures.
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I will brainless who can answer this all pleaseeeeej
Answers
Answer:
1. FALSE
2. TRUE
3. TRUE
4. FALSE
5. FALSE
6. TRUE
7. TRUE
8. TRUE
9. TRUE
10. TRUE
Explanation:
1. Conduction occurs more readily in solids and liquids
2. Gold is used as a contact metal in the electronics industry as it is a good conductor of both electricity and heat.
3. None
4. Radiation is the fastest mode of heat transfer while conduction is the slowest mode of heat transfer
5. Heat from Sun reaches us by the process of radiation
6. None
7. It is the motion of particles that creates a form of energy called heat (or thermal) energy that is present in all matter
8. At a temperature of 0o C, the thermal energy within a given system is also zero
9. None
10. None
PLEASE MARK BRAINLIEST, THANKS <3
Fe+H2SO4------>????????????
Answers
equation: Iron + Sulfuric acid → Iron (II) sulfate + hydrogen gas
Type of Chemical Reaction: For this reaction we have a single displacement reaction.
Note that this is the chemical reaction that takes place when diluted Sulfuric acid reacts with iron. If you have concentrated Sulfuric acid you will have a different equation.
Phosphorus-32 has a half-life of 14.3 years. How many grams remain after 57.2 years if you have
4.0 g of the isotope at the beginning?
Answers
Answer:
29.3 years to live
Explanation:
Phosephurus loses 32 years at his life -32
then he gains 14.3 years back and another 57.2 years
totaling 29.3 years he will live
what are the intervals on the fahrenheit scale called
Answers
Fahrenheit temperature scale fâr´ənhīt˝ [key], temperature scale in which the temperature difference between two reference temperatures, the melting and boiling points of water, is divided into 180 equal intervals called degrees.
Convert 3,124,991 centimeters (cm) to miles (mi) rounding to 4 sig figs
Answers
Answer:
19.417794 mi
Explanation:
Answer:
19.41
Explanation:
how many protons does boron-11 atom have
Answers
Answer:
5
Explanation:
Give an example of a type of cookie that is a heterogeneous mixture, and a type of cookie that is a homogeneous mixture. Explain your reasoning.
plz answer
Answers
homogeneous- chocolate chip cookie
Which have different numbers of electrons?
different ions of an element
different isotopes of an element
the nucleus of an element
each of the atoms of an element
Answers
Answer: different ions of an element, the answer is A
Explanation: Took the quiz
Answer:
different ions of an element, the answer is A
Explanation:
edge 2022
phenolphthalein is used as a visual indicator in a strong acid-strong base titration because
Answers
The pH range of phenolphthalein is 8.3 - 10.0, which is suitable with the pH range of Strong Acid and Strong base titration and so phenolphthalein is used as a visual indicator in a strong acid-strong base titration.
What is an Indicator ?Any substance that gives a clear visible indication of the presence or absence of a particular concentration of a chemical species, such as an acid or an alkali in a solution, usually by a colour change.
The pH range of Strong Acid and Strong base titration is 3–11 and equivalent point is at 7
the pH range of Strong Acid and Weak base titration, is 3–8 and equivalent point is below 7
the pH range of Weak Acid and Strong base titration, is 6 - 11 and equivalent point is above 7
So for titration , an indicator with suitable pH range is used
The pH range of phenolphthalein is 8.3 - 10.0.
Therefore phenolphthalein is used as a visual indicator in a strong acid-strong base titration.
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15). A covalent chemical bond is one in which A) electrons are removed from one atom and transferred to another atom so that the two atoms become oppositely charged. B) protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms. C) outer-shell electrons of two atoms are shared so as to satisfactorily fill the outer electron shells of both atoms. D) outer-shell electrons of one atom are transferred to the inner electron shells of another atom. E) the inner-shell electrons of one atom are transferred to the outer shell of another atom.
Answers
Answer:
B) protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms
what is physical change
Answers
Answer:
changes that dont result in the formation of new substance with new properties.
Can someone help me to write the ionic equation :((
Answers
Answer:
Here use this to help you
Explanation:
what is the acceleration due to gravity of the moon
Answers
PLEASE HELPP!
True or False: Hydrogen is an alkali metal.
Answers
Answer: falso
Explanation:
2. In which sentence is the term heat used correctly?
A. Heat moves from a cold cup to warm tea.
B. A thermometer measures the heat in an object.
C. The heat from the hot cup warms my hands.
D. Warm soup contains more heat than cold soup does.
Answers
Answer:
c. The heat from the hot cup warms my hands
When the temperature of the air in a hot air ballon increases, what happens to the volume of the gas?
Answers
Answer:
As the temperature increases, the gas particles absorb more heat energy. They speed up and move farther away from one another. So the increase in temperature causes an increase in volume. (Boyles Law)
identify the number of bonding pairs and lone pairs of electrons in water.
Answers
Answer:
2 bonding pairs and 2 lone pairs
(WILL GIVE BRAINLESS)Throwing a paper airplane through the air is an example of A. fluid friction B. sliding friction C. rolling friction D. solid friction
Answers
Answer:
sliding friction
Explanation:
Answer:
D. solid friction
Explanation:
Its not a fluid, Its not sliding, and its not rolling, so therefor is solid friction
Anyone help me answer this please anyone
Answers
Answer:
[tex]\huge\boxed{\sf Q = 5880\ Joules}[/tex]
Explanation:
Given:
m = mass = 40 g = 0.04 kg
c = specific heat constant of water = 4200 J/Kg°C
ΔT = change in temperature = T2-T1 = 60 °C - 25 °C = 35°C
Required:
Q = change in heat energy = ?
Formula:
Q = mcΔT
Solution:
Q = (0.04)(4200)(35)
Q = 5880 Joules
[tex]\rule[225]{225}{2}[/tex]
What volume of water has a mass of 1 kg?
Answers
Answer:
the value of water is 1000
SUPER EASY. just check if i'm right or not. WILL GIVE BRAINLIEST
Answers
Answer:
what is the question
Explanation:
Answer:
Um what do u want us to check?
Explanation:
raw or undercooked shellfish may be contaminated with what type(s) of bacteria
vibrio vulnificus
salmonella
vibrio vulnificus and vibrio parahaemolyticus
Answers
Answer:
vibrio vulnificus and vibrio
Explanation:
Answer:
vibrio vulnificus and vibrio parahaemolyticus
answer false or true for each question, (1-5). thanks!
Answers
3. Suspension
4. Solute
5. Solvent
Part E
In which state of matter are the particles the most spread out?
Answers
Gas has the most spread out particles.
Can someone find from which website this test is?
Answers
Answer:
Try quizlet, they have everything on there
Explanation:
