What is the chemical formula of a trisaccharide made of three bonded glucose molecules?

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.

Learn more about Ancient Atmospheric Chemistry here:

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Answer:

38.8 g

Explanation:

Density is just mass divided by volume, so if you know 2 of those 3 things you can solve for the other one.

Let's write it as:  D = m/v

We know D, and we know v, so solve for m:

m = Dv

Now just plug in the the known values:

m = (0.98 g/ml)( 39.63 ml) = 38.8 g

(Notice how ml cancelled out, leaving grams, which is what we wanted for mass.)

Answer;

pH = 7  

Explanation;

• HNO3 is a strong acid. KOH is a strong base. At the equivalence point, the solution will be neutral.
• Therefore; the pH at the equivalence point when 0.10 m HNO3 is used to titrate a volume of solution containing 0.30 g of KOH will be 7.
• The neutralization of a strong base with a strong acid gives a salt solution at the equivalence point. The salt contains ions that do not change the pH of water.

Answer:

pH at equivalence point will be 7

Explanation:

• is a strong acid and KOH is a strong base. Hence a neutral salt would appear from acid-base reaction between them.
• Acid-base reaction:
• At equivalence point, and water exists in medium.
• As is a neutral salt therefore pH of medium will be equal to 7 (neutral).
• So, pH at equivalence point will be 7.