How many chloride ions (Cl-1) are needed to balance the positive charge of a barium ion (Ba+2)?
A) 2
B) 1
C) -2
D) -1
E) 3
Answer: A
You might also like to view...
The ancient Greeks get a lot of attention for their contributions to science because ________
A) they were the only ancient culture that kept written records of their astronomical observations B) they were the first people to realize that Earth is a planet orbiting the Sun C) they were the first people known to try to explain nature with models based on reason and mathematics, without resort to the supernatural D) the books of every other culture were lost in the destruction of the library of Alexandria
Starting from rest, a 2 kg body acquires a speed of 8 m/s in 2 seconds. The net force acting on the body is __________
Fill in the blank(s) with correct word
Charon is tidally locked to Pluto but Pluto is not tidally locked to Charon
a. True b. False Indicate whether the statement is true or false
The water that operates a fission-reactor turbine is
A) not the same water that flows through the reactor. B) heated to high-pressure steam. C) without radioactivity. D) all of the above E) none of the above