Which of the following phrases describes core electrons ?
A. Electrons that are involved in chemical reactions
B. Electrons that determine an atoms properties
C. Electrons that are farthest from the nucleus
D. Electrons that are closest to the nucleus

D, Electrons are closest to the nucleus

Explanation:

the volume of fluid displaced would equal the volume of the gas. use a gas syringe - this is a laboratory instrument that can be used to withdraw a certain volume of gas from a closed system or to measure the volume of gas from a chemical reaction.

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.