Nigtrogen and hydrogen combine to produce ammonia.

N2+H2? NH3

Which set of coefficients balances the equation?

A) 1,1,1

B) 1,1,2

C) 1,3,2

D) 2,3,2

Which type of rock would form from a lava following a volcanic eruption

Scientific laws are so complex that they can rarely be explained by mathematical equations. True or false?

The triangular-shaped body of water that forms where a streams enters a larger body of water is a/an A. alluvial. B. delta. C. meander. D. rejuvenation.

Which of the following is (are) involved with motor activity (either initiation or coordination) ? a) red nuclei b) Wernicke's area c) gustatory cortex d) postcentral gyrus

Which is true about a surface wave? A. It only has properties of transverse waves B. It only has properties of longitude waves C. It only has properties of both transverse and longitudinal waves D.

Why should scientists write reports and give oral presentations of the steps and results of their in investigations?

Which of these rocks are formed by volcanic activity? select the two correct answers. a. marble b. basalt c. limestone d. granite e. sandstone

Which source is most likely an authority on the subject? Dr. Vale, a pediatrician, discusses electrical circuitry on her home-improvement website. Jonah, an amateur cook, teaches his son how to make the best grilled cheese sandwiches.

What methods can be used to break down substances into elements

8. A gas is contained in a horizontal piston-cylinder apparatus at a pressure of 350 kPa and a volume of 0.02 m3. Determine the work done by the piston on the gas if the cylinder volume is increased to 0.15 m3 through heating.