What makes up the compound H2O?
Answers
Answer:
2 hydrogen atoms bonded with 1 oxygen atom
Explanation:
In the compound , the number 2 after the H means that there are two atoms in the preceding letter (element), and since there are no numbers ofter the O, that means there is only 1 atom.
Related Questions
The specific heat of a solution is 4.18 J/(g•°C)and its density is 1.02 g/mL. The solution is formed by combining 25.0 mL of solution A with 25.0 mL of solution B with each solution initially at 21.4°C. The final temperature of the combined solution is 25.3°C. Calculate the heat of reaction, q, assuming no heat loss due to the calorimeter. I got 831 JThe part I cannot figure out is the question afterwards which is If the calorimeter has a heat capacity of 8.20 J/°C and a correction is included to account for the heat absorbed by the calorimeter what is the heat of reaction q
Ice (H2O) melting at 273 K and 1 atm has = 6.01 kJ/mol and = 6.01 kJ/mol while water vaporizing under the same conditions has = 37.6 kJ/mol and = 40.7 kJ/mol. Why is there such a large difference between and , but not for and ?
The process of a material going through a change of state from a gas to a liquid is called
What is the temperature increase of 6.4 kg of water when it is heated by a 7.7
Answers
C = Celsius
K = k=Kelvin
C + 273.15 = K
200 + 273.15 = K
473.15 = K
200 + 273.15 = 473.15 Kelvins
Will mark brainliest to correct answers
1. What happens in a chain reaction?
A) Products that start a new reaction are released.
B) Reactants that have two parts split
C) Products that are radioactive are lost
D) Radioactive reactants are deposited on control rods
2. Which type of coolant(s) usually is (are) used to remove heat from nuclear reactor core?
A) water only
B) liquid sodium only
C) liquid sodium or water
D) CFCs
3. A reaction that results in the combining of smaller atomic nuclei is ___.
A) chemical
B) fission
C) fussion
D) ionization
4. What does neutron absorption accomplish in a nuclear reactor?
A) It slows down the reaction.
B) It speeds up the reaction
C) It increases the rate of heat absorption
D) It recycles the fuel
Answers
Answer:
C B A D
Explanation:
Answers
C2H2 + 5/2O2 = 2CO2 + H2O
We are given the amount of C2H2 being burned. This will be our starting point.
64.0 g C2H2 (1 mol C2H2 / 26.02 g C2H2) (1 mol H2O/1mol C2H2) ( 18.02 g H2O/1mol H2O) = 44.32 g H2O.
Thus, the answer is 44.32 g H2O.
Answers
hope it help you.
Write the name of the process that occurs as the dry ice undergoes a phase change in the flask. [1]
Compare the entropy of the CO2 molecules in the dry ice to the entropy of the CO2 molecules in the inflated balloon.
Answers
Answer:
- Heat flows from the air into the dry ice.
- Sublimation (its when a solid becomes a gas without becoming a liquid first).
- CO2 molecules in gaseous phse has more entropy than in solid phase.
Explanation:
- To sublimate dry ice needs to fain energy, wich is provided by the surrounding air.
- Solid is the more condensated state of matter, so it has less entropy than any other state of matter.
B) It attempts to explain why things happen.
C) It describes what happens in the world around us.
D) It must be supported by many independent scientific investigations.
2)Observation and experimentation have led many scientists to accept a theory about the origin of the universe. This theory is called the Big Bang Theory. Scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. What makes this a scientific theory?
A)It has been proven by several scientists independently, resulting in its being accepted as truth.
B)It is based on the beliefs and opinions of the majority of the scientific community.
C)It is an observation of the natural world that has been proven as fact.
D)It is the best explanation that scientists can offer, based on many scientific investigations.
3)A scientist in Italy published his findings from a scientific investigation that he conducted. Other scientists from around the world conducted similar investigations to test the results. All of the investigations result in similar findings. What does this say about the findings of these investigations?
A)They have been proven to be scientific fact because all the investigations gave similar findings.
B)The findings are automatically promoted to a law because they were proven by so many scientists.
C)They are ready to be published in the media and in text books as a new scientific theory.
D)The results are considered more reliable because they were documented by separate investigations.
4)Which of the following is not an example of kinetic energy?
A)mechanical energy
B)nuclear energy
C)electrical energy
D)thermal energy
Answers
A) It must be verified by scientists around the world.
A scientific law is a way to describe a phenomenon that occurs in our universe. In order for a research to become law, it must be accepcted by the vast majority - if not all - of the scientists in the same field. However, they do not have to verify the potential law, they can choose to falsify or just to accept proofs taken by the discovers.
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A)It has been proven by several scientists independently, resulting in its being accepted as truth.
The Big bang is a scientific theory that explain how our universe was born. Before becoming a theory and becoming the "fact" we assume it is, it was long subject of study, and it was accepted only when different study from different scientists pointed out in the same direction. Hoever, ever today, study continues to have a better understanding of the phenomenon.
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D)The results are considered more reliable because they were documented by separate investigations.
When different experiments are made, and they gave out similar results, the results become more reliable, as they are been proven by different sources in an indipendent way. However, this do not imply a pubblication or the trasformation of the results into a scientific law, as those steps go through a different process.
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B)nuclear energy
C)electrical energy
D)thermal energy
Only mechanical energy is a type of kinetic energy. Kinetic energy means an energy that derives from a movement. Nuclear energy, electrical energy and thermal energy are other forms of energy. Energy from one of these sources could be converted into kinetic energy, or kinetic energy could be used to generate other forms of energy.
C) It describes what happens in the world around us.
2)Observation and experimentation have led many scientists to accept a theory about the origin of the universe. This theory is called the Big Bang Theory. Scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. What makes this a scientific theory?
D)It is the best explanation that scientists can offer, based on many scientific investigations.
3)A scientist in Italy published his findings from a scientific investigation that he conducted. Other scientists from around the world conducted similar investigations to test the results. All of the investigations result in similar findings. What does this say about the findings of these investigations?
A)They have been proven to be scientific fact because all the investigations gave similar findings.
4)Which of the following is not an example of kinetic energy?
A)mechanical energy