If 42 g of nitrogen reacts completely with 9 g of hydrogen (atomic mass 1) to form ammonia (NH3), the atomic mass of nitrogen must be
A. 52.
B. 3.
C. 49.
D. 55.
E. 14.
Answer: E
Physics & Space Science
You might also like to view...
Of all the forms of electromagnetic radiation, the one with the lowest frequency is:
A) gamma rays. B) ultraviolet rays. C) visible light. D) microwaves. E) radio waves.
Physics & Space Science
Chemical sedimentary rocks are classified into what two categories?
a. Organic and inorganic b. Fine and coarse c. Intrusive and extrusive d. Concordant and discordant
Physics & Space Science
Behind a warm front, the air is
A) cool and wet. B) warm and sunny. C) warm and wet. D) cool and dry.
Physics & Space Science
Identical 8.0-?C point charges are positioned on the x axis at x = ±1.0 m and released from rest simultaneously. What is the kinetic energy of either of the charges after it has moved 2.0 m?
a. 84 mJ b. 54 mJ c. 96 mJ d. 63 mJ e. 48 mJ
Physics & Space Science