B. A new gas is observed in the form of bubbles
C. Red and yellow paint mixing to make orange
D. The temperature of the substance remains constant updates
To solve such this we must know the concept of chemical reaction. Therefore, the correct option is option B that is a new gas is observed in the form of bubbles.
Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
The characteristics of chemical reaction are:
Evolution of a Gas
Change in temperature
Change in color
Formation of Precipitate
The evidence that a chemical reaction has occurred is a new gas is observed in the form of bubbles.
Therefore, the correct option is option B that is a new gas is observed in the form of bubbles.
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(1) have combined chemically and retain their different boiling points
(2) have combined chemically and have the same boiling point
(3) have combined physically and retain their different boiling points
(4) have combined physically and have the same boiling point
Both 2-propanol and water can be separated by the process of distillation because the 2-propanol and water have combined physically and retain their different boiling points. Thus, the correct option for this question is C.
Distillation may be defined as a methodology through which components are separated from a mixture. It involves the process by which the components are evaporated and the vapors condensed.
2-propanol is also known as Isopropyl alcohol. The boiling point of this is 82.5°C which is lower than that of water. When both 2-propanol and water are mixed they usually get separated through the physical process known as boiling. Water typically starts boiling at 100°C.
Therefore, the correct option for this question is C.
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Answer:
When it comes to ice cream, there are two big advantages to using liquid nitrogen over an electric machine or an old-timey hand-cranked job. First, it’s faster. Second, because it’s faster, there’s less likelihood that your cold confection will develop those pesky ice crystals that form when the ice cream freezes too slowly. To recap: better dessert, in your mouth sooner. What’s not to love?
Make mine the brainliest
Explanation:
b. NaCl
c. CO2
d. H2O
Answer:
NaCl does not contain molecules
Explanation:
Molecules are made of multiple atoms bonded together to form a single entity.
In (H-H), two hydrogen atoms are bonded together through a covalent bond. Hence it is a molecule.
In (O=C=O), one carbon atom and two oxygen atoms are bonded together through double bond. Hence it is molecule
In (H-O-H), one oxygen atoms and two hydrogen atoms are bonded together through single bond. Hence it is a molecule.
In NaCl, ions are held together through ionic attraction forces. Here no actual bond exists between . Both remain present as individual ions.
Hence NaCl does not contain molecules
false?
Answer:
B. new elements are created when uranium breaks apart
Explanation: