Which of the following does not involve chemical processes? A. cooking of food B. Changing of fruit color when it ripens C. Burning of Wood D. None of the above

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

What is the vapor pressure of a solution with a benzene to octane?