The yellow element that stinks when burned is sulfur.
Sulfur is a chemical element with the symbol S and atomic number 16. It is a non-metal that is a member of the chalcogen group in the periodic table. Sulfur is a yellow solid at room temperature. It is insoluble in water but soluble in carbon disulfide. When sulfur is burned, it produces a foul-smelling gas called sulfur dioxide.
Sulfur dioxide is a colorless gas with a pungent, irritating odor. It is a major air pollutant and can cause respiratory problems. Sulfur is used in a variety of applications, including the production of sulfuric acid, gunpowder, and rubber. It is also used in the vulcanization of rubber. Sulfur dioxide is a highly reactive gas. Sulfur dioxide has a low boiling point. Sulfur dioxide is heavier than air.
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Answer:
K2CO3 dissociates more ions than Kr
Explanation:
A solution conducts electricity because of much supply of ions an example is strong electrolytes. A solution contains both positive and negative ions and the ability of these ions to move freely allows them to carry positive and negative charges thereby conducting electricity. A solution such as K₂CO₃ dissociates more ions than KBr, therefore it is a better conductor of electricity. Neutral solutions do not conduct electricity.
a. Jupiter → Uranus → Mars → Mercury
b. Mars → Venus → Earth → Mercury
c. Neptune → Saturn → Jupiter → Uranus
d. Uranus → Jupiter → Neptune → Saturn
Answer:
The correct answer is option A, Jupiter → Uranus → Mars → Mercury
Explanation:
Time taken by Jupiter to make one rotation = 9h 56m
Time taken by Uranus to make one rotation = 17h 14m
Time taken by Neptune to make one rotation = 16h 6m
Time taken by Mars to make one rotation = 1d 0h 37m
Time taken by Earth to make one rotation = 23 hours, 56 minutes, and 4 seconds
Time taken by Saturn to make one rotation = 0d 10h 42m
Time taken by Venus to make one rotation = 116d 18h 0m
Time taken by Mercuryto make one rotation = 58d 15h 30m
Thus the correct order is option A,
Jupiter (9h 56m)< Uranus(17h 14m)< Mars(1d 0h 37m) <Mercury (58d 15h 30m)
False
Answer:
Example: Burning wood
Souring milk
Mixing acid and base
Baking a cake
Explanation:
Chemical changes occur when a substance combines with another to form a new substance.
Example: Burning wood
Souring milk
Mixing acid and base
Baking a cake
Answer:
The process is called Nitrogen fixation
Explanation:
The nitrogen fixation is a process carried out by some prokaryotic microorganisms (bacteria), specifically those have the presence of the nitrogenase enzyme. The bacteria absorb the atmospheric nitrogen (N2) from the roots of plants, and the nitrogenase enzyme, with the help of two proteins that act as electron donors and acceptors (nitrogenase complex) reduce the nitrogen to ammonia (NH3), then the ammonia is ionized to NH4+ (ammonium). Followed by that, the ammonia is oxidated to nitrates and nitrites, which are finally absorbed again by plants.