Which reaction occurs at the cathode in an electrochemical cell?(1) combustion (2) neutralization (3) oxidation (4) reduction
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Ammonia and sulfuric acid react to form ammonium sulfate. Determine the starting mass of each reactant if 20.3 g of ammonium sulfate is produced and 5.89g of sulfuric acid remains unreacted.
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In nature, gold most often occurs in metallic form, alloyed with silver.
Answer:
SOLID
Explanation:
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Answer : The number of moles of sulfur present in sample are, 7.343 moles
Solution : Given,
Mass of sulfur = 232 gram
Molar mass of sulfur = 32 g/mole
Formula used :
Therefore, the number of moles of sulfur present in sample are, 7.343 moles
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hope this helps!
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Final answer:
The solvent in lemonade is water.
Explanation:
The solvent in lemonade is water. Lemonade is made by dissolving lemon juice and sugar in water. Water is the substance in which the other components, such as lemon juice and sugar, are dissolved.
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Answer:
Due to deficiency of Oxygen in atmosphere.
Explanation:
Oxidation is defined in two ways, 1) The addition of Oxygen and Removal of Hydrogen 2) The removal of electrons.
We will discuss the first definition for this question. The addition of oxygen to various compounds results in the oxidation of that compound.
Example: Oxidation of Methane;
CH₄ + 2 O₂ → CO₂ + 2 H₂O
In this example oxygen is added to methane and hydrogen is being removed from methane.
Oxidation type chemical weathering common more than 2 billion years ago because of less amount of Oxygen in atmosphere and the oxygen which was produced by plants reacted with different metals like Iron forming precipitates which precipitated to the bottom of oceans.
Final answer:
Oxidation type chemical weathering was not common more than 2 billion years ago due to the scarcity of free oxygen in the Earth's atmosphere. The early atmosphere was anoxic, and it was only with the evolution of cyanobacteria that oxygen began to accumulate. This oxygen increase allowed for the evolution of more complex life forms and facilitated oxidation type chemical weathering.
Explanation:
The main reason why oxidation type chemical weathering wasn't common more than 2 billion years ago is the scarcity of free oxygen in the Earth's atmosphere during that period. Studies of the chemistry of ancient rocks show that despite the presence of plants releasing oxygen through photosynthesis, Earth's atmosphere and oceans lacked abundant free oxygen until about 2 billion years ago. The oxygen gas was rapidly removed through chemical reactions with Earth's crust.
Moreover, the early atmosphere was anoxic, meaning it had no molecular oxygen. As a result, only anaerobic organisms, which can grow without oxygen, could live. It was only later with the evolution of cyanobacteria, also known as blue-green algae, that oxygen began to accumulate in the atmosphere.
This increase in atmospheric oxygen allowed the evolution of more complex life forms and the development of more efficient oxygen-utilizing processes. It also facilitated the oxidation type chemical weathering that we see today, which requires free oxygen to occur.
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c. can be broken down into atoms.
b. smells.
d. reacts with other substances.