A reaction releases 489.34 J of heat how many calories of heat is that equal to 1 cal equals 4.186 J

What is the molecular geometry if you have 4 single bonds around the central atom? what is the molecular geometry if you have 4 single bonds around the central atom? bent linear tetrahedral trigonal pyramidal not enough information?

A science club made pine wood cars. Each car was set on the same track and then released. The distance traveled was measured. Lillian's car went the farthest, 27 meters. Jared's car went 168 decimeters. How much farther did Lillian's car travel?

Which statement below about contrasting Hb and Mb is FALSE? A. Oxygen binds to a ferrous ion in both proteins. B. Hb shows cooperativity, whereas Mb does not. C. Hb binds O2 more tightly than Mb. D.

Which of these is caused by a chemical change? a. the honey in a jar crystallizes and will no longer pour. b. the skin of a banana turns from green to yellow as it ripens. eliminate c. a box of powdered brown sugar turns into a solid brick over time.

When electrons are removed from the outermost shell of a calcium atom, the atom becomes?

What is the difference between the crest of a longitudinal wave and the crest of a transverse wave?

How is a pure substance different than a mixture

What is emitted from most manufactured building materials and furniture?

What is kinetic energy related to? A. heat B. position C. motion D. electricity

Mizar is a star system that is composed of two pairs of stars, mizar A and mizar B, or four stars in total. What do astronomers call a system that is composed of more than two starts?