Answer:
124.98
Explanation:
The molar mass of phosphorus, M=PVwRT=1×34.05×10−30.0625×0.08314×819=124.98.
Answer:
7.613 kg
Explanation:
Since you need a ratio of 2 moles of LiOH for each mole of CO2, you can find the mass of LiOH that you need. The first thing that you need to do is to find the number of moles that 3.575 L of carbon dioxide gas is. At STP, there are 22.4 liters of gas in a mole, meaning that there are about 0.159 moles of carbon dioxide. Multiplying this by 2 you get 0.318 moles. The molar mass of LiOH can be calculated by adding together the molar masses of each of the constituents. Lithium has a molar mass of 6.941, oxygen has a molar mass of about 16, and hydrogen a molar mass of about 1. Adding this together you get a molar mass of 23.941kg, which for 0.318 moles is just 23.941*0.318=7.613 kg. Hope this helps, and PM me with questions!
The reason is it has more sugar and energy to feed fungi, causing it to mold.
Answer: Option (D) is the correct answer.
Explanation:
According to Kinetic theory of gases, molecules of a gas move in rapid and random motion. That is, particles are constantly in linear motion.
When these molecules colloid with each other then no energy is gained or lost by them. Also, these molecules occupy negligible amount of volume as compared to the volume of the container in which they are placed.
Moreover, as there is no energy loss taking place so, these molecules of gas undergo perfect elastic motion.
Therefore, we can conclude that all of the above given options are true according to the kinetic theory of gases.
Answer:
c. main energy level of an electron
Explanation:
An atom can be defined as the smallest unit comprising of matter that forms all chemical elements. Thus, atoms are considered to be the building blocks of matter and as such defines or determines the structure of a chemical element.
Generally, atoms are typically made up of three distinct particles and these includes; protons, neutrons and electrons.
In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.
The principal quantum number, denoted by n, represents the main or overall energy level of an electron.
Basically, this property of an electron determines its energy level, as well as its distance from the nucleus of an atom of any chemical element. Also, as the distance of each orbital from the nucleus increases, the energy level increases respectively. Thus, sets of orbitals having the same principal quantum number (n) are generally referred to as an electron shell.
