Consider the irreversible reaction A + 2 B → 3 C .
Which of the following correctly expresses
the rate of change of [B] ?
1.
∆[B]
∆t
= −2 (rate of rxn)
2.
∆[B]
∆t
= −
1
2
(rate of rxn)
3.
∆[B]
∆t
= −(rate of rxn)
4.
∆[B]
∆t
= +
1
2
(rate of rxn)
5.
∆[B]
∆t
= +(rate of rxn)
6.
∆[B]
∆t
= +2 (rate of rxn)

Which sentence best describes the formation of igneous rock? a- lava on the surface dries up and makes arock b_melted rocks cools and forms crystals c_rocks under tremendous heat and pressure d_magma is melted rock underground

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.