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PSYCHO15rus [73]
3 years ago
5

According to the collision theory, when can a chemical reaction occur?

Chemistry
1 answer:
Rudik [331]3 years ago
6 0

when reactants collide with enough energy to intersect their valence shells and form new bonds

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All of the following contribute to the large, negative, free-energy change upon hydrolysis of "high-energy" compounds except: a.
klasskru [66]

Answer:

C) low activation energy of forward reaction

Explanation:

Activation energy for the forward reaction is the quantity of free energy which is needed for a reaction to move from the reactant phase of energy level to the transition state of energy level. The higher the rate of energy level, the slower the chemical reaction.

Activation energy is a barrier that must be overcome for a reaction to take place.

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Which parameter is measured directly in a coffee-cup calorimeter?
Softa [21]

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Pressure

Explanation:

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2 years ago
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What is the mass in grams of 3.75 × 10 21 atoms of Li?
adelina 88 [10]

Answer:

The mass

Explanation:

the mass grams of 3.75 × 10 21 atoms of Li is

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2 years ago
Which hybrid orbitals overlap to form the sigma bonds between the indicated atoms in xanthine?
amid [387]

Answer:

C.) Csp² - Nsp³

Explanation:

Because the carbon has only 3 unique bonds, the conformation of the carbon should be Csp² (s + p + p). While the nitrogen also has only 3 bonds, making up 3 orbitals, it also has a lone pair of electrons. These electrons also take up one orbital. Therefore, the conformation of nitrogen is Nsp³ (s + p + p + p).

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2 years ago
How many Joules of energy are needed to raise 87.3 grams of aluminum from 22,5 C to 47.3. C. The specific heat of aluminum is 0.
Sholpan [36]

Energy needed : 1955.03 J

<h3>Further explanation</h3>

Heat can be formulated:

Q=m.c.Δt

Q=heat,J

m=mass,g

c=specific heat,J/g °C

Δt=temperature, °C

m=87.3 g

Δt= 47.3-22.5=24.8 °C

c=0.903 J/g °C

\tt Q=87.3\times 0.903\times 24.8=1955.03~J

5 0
2 years ago
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