What are the Coefficients in the balance equation below? 1 H2SO4 + 2 NaNO2 --->2 HNO2 + 1 Na2SO4
A. 10:10
B. 6:4:4:6
C.2:4:2:2:2:4
D. 1:2:2:1

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d