A chemical or physical change that releases heat into its surroundings is ...

A. An exothermic process

B. melting ice

C. endothermic process

D. A phase change

Compare the amount of carbon dioxide released in one year from burning coal to power 10, 65-watt incandescent bulbs with the amount released from powering 10, 13-watt compact fluorescent light (CFL) bulbs.

Is P3I10 a proper compound?

It is snowing where Jenna lives. It's been snowing all day, but now the snow has changed to sleet and then to freezing rain. What is happening to cause these changes?

With phenol the formaldehyde forms a polymer that is part of the plastic bakelite. Okay, but what is the equation? I can't find it

What is more soluble, ammonium chloride or sodium chloride?

Bases in solution produce what type of ions? a. sulfide ions b. chloride ions c. hydroxide ions d. hydronium ions

How many earth minutes are represented by 0.1 martian sol

Which of the following shows three elements in order of decreasing conductivity? A. Zn, Pd, Ag B. Pd, Ag, Zn C. Ag, Pd, Zn D. Zn, Ag, Pd Which of the following is the name of a metal? A. K B. Potassium chloride C. Potassium D. KCI

Which of the following describes nuclear fission? It requires extremely high temperatures to begin the reaction. It involves the combining of nuclei. It involves bonding electrons. Its chain reactions can be initiated by neutrons.

Which is a quantitative observation A. 15 m long B. red color C. rough texture D. strong odor