Need answer ASAP!! Which of the following elements has the greatest atomic radius? *

A) Mg
B) Sr
C) Ca
D) Ba

How many molecules of sucrose c12h22o11 are there in 454 grams of sucrose

Define dew point. i am writing this part to be able to ask the question

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange