What is the term for a chemical symbol of an element surrounded by a dot representing each valence electron?
A) atom dot notation
B) core notation
C) electron dot formula
D) valence formula
E) none of the above
Question 2
Zinc reacts with aqueous sulfuric acid to form hydrogen gas: Zn (s) + H2SO4 (aq) ZnSO4 (aq) + H2 (g) In an experiment, 177 mL of wet H2 is collected over water at 27 C and a barometric pressure of 766 torr.
The vapor pressure of water at 27 C is 26.74 torr. The partial pressure of hydrogen in this experiment is ________ atm. A) 0.972
B) 739
C) 1.01
D) 793
E) 1.04
Question 3
The main scientific difficulty in achieving a controlled fusion process is the ________.
A) enormous repulsion between nuclei being fused
B) enormous repulsion between the electrons of atoms being fused
C) very large number of positrons emitted
D) very large number of x-rays emitted
E) very large number of gamma rays emitted
An activation barrier, representing the transition state
Chemical bonds
An example of a urine chemical analyzer.
Yin–Yang symbol.
IPM combines biocontrol and chemical methods
Signal Transmission at a Chemical Synapse