What would likely happen if you were to touch the flask in which an endothermic reaction occurring
2 answers:
You might be interested in
The half-life of cobalt-60 is 5.26 years. After 10.52 years, 5 grams of a 20-gram sample will remain is TRUE
<u>Explanation:</u>
Mass of cobalt = 20 g
Half-life = 5.26 years
Mass remains after 10.52 years = 5 g
This can be solved by using given below formula,
= initial mass
t = number of years from when the mass was m_0
m(t) = remaining mass after t years
Number of half-lives =
Number of half-lives =
Number of half-lives = 2
At time zero = 20 g
At first half-life = = 10 g
At second half life = = 5 g
The given statement is true.
At room temperature oxygen, is present in the gas phase.
A gas is defined as a substance which is characterized by the rapidly movement of molecules which are widely separated. The shape and volume of gas is not definite that is they take on the shape of the container in which it is placed. The gas molecules have minimum inter-nuclear attractions and thus have high kinetic energy.
Thus, the sentences that describes oxygen at room temperature are:
- It has no definite volume and takes the shape of its container.
- Its particles move fast enough to overcome the attraction between them.
- It has more energy than it would be at a cooler temperature as the kinetic energy is directly proportional to the temperature that is kinetic energy increases on increasing the temperature.