Which of the following is physical change a. Corrosion
b. explosion
c. Evaporation
d. rotting of food ***
Answers
hope this helps
Related Questions
At which temperature and pressure would a sample of helium behave most like an ideal gas?1 75 K and 500 kPa 2 150. Kand 500 kPa 3 300. Kand 50 kPa 4 600. K and 50 kPa Submit Answer
How much heat is required to vaporize 50.0 g of water if the initial temperature of the water is 25.0◦c and the water is heated to its boiling point where it is converted to steam? the specific heat capacity of water is 4.18 j · ( ◦c)−1 · g −1 and the standard enthalpy of vaporization of water at its boiling point is 40.7 kj · mol−1?
A chemical change is a change in the ______ of a substance.a. composition c. temperature b. appearance d. melting point
Which one has the less density?
Answers
The scientist that provided a foundation for John Dalton’s work on the atomic structure is Sir Joseph John Thompson or J.J. Thompson. It was theorized after the discovery that electrons are present in the atom. In this model, the atom is composed mainly of electrons. It was describe as plum pudding because the electrons are dispersed within the atom.
Answers
B) very dry environments, such as land
C) bottom of a lake covered by sediment
Eliminate
D) an environment exposed to natural elements
Answers
2H2O2 → 2H2O + O2
CaCO3 → CaO + CO2
2AgNO3 + Zn → 2Ag + Zn(NO3)2
Answers
Answer: The correct answer is
Explanation:
Synthesis reaction is defined as the reaction in which two smaller substances combine together to form a large single compound.
From the given options:
Option A:
This is a synthesis reaction and only one product is forming.
Option B:
This is a decomposition reaction.
Option C:
This is a decomposition reaction.
Option D:
This is a single displacement reaction.
Thus, the correct answer is
Final answer:
A synthesis reaction is a chemical reaction in which two or more substances combine to form a single, more complex substance. The correct synthesis reaction from the given options is 2H2 + O2 → 2H2O.
Explanation:
A synthesis reaction is a chemical reaction in which two or more substances combine to form a single, more complex substance.
In the given options:
- 2H2 + O2 → 2H2O is a combination reaction (synthesis) as hydrogen and oxygen combine to form water.
- 2H2O2 → 2H2O + O2 is a decomposition reaction as hydrogen peroxide breaks down into water and oxygen.
- CaCO3 → CaO + CO2 is a decomposition reaction as calcium carbonate decomposes into calcium oxide and carbon dioxide.
- 2AgNO3 + Zn → 2Ag + Zn(NO3)2 is a single displacement reaction as silver nitrate reacts with zinc to form silver and zinc nitrate.
Therefore, the correct answer is
2H2 + O2 → 2H2O
.
Learn more about Synthesis reaction here:
#SPJ6
Answers
It is a colorless, natural gas, and can breaks down atom creates CH3 with water vapor that Carbon tetrafluoride,CF4, don't have that has a high bond strength due to its nature of the carbon-fluorine bond and is a potent greenhouse gas.
CH4 has a lower boiling point than CF4 because it is a tetrahedral molecule with four equivalent C-H bonds.
Answers
Silicon generally forms at least polar covalent bonds, like carbon, as befits its status as a Gropu 4A nonmetal. The only obvious exception I can think of is SiC, which despite the similarity you might expect to graphite or diamond does, I think, have significant ionic or metallic character to its bonding in the solid state.