What is the formula of a compound formed from the ions M3+ and X3-?
a. M2X
b. MX
c. M2X3
d. MX2
b
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Which of these were observed from Earth, prior to spacecraft missions to Mars?
A) seasonal changes in the polar caps B) eruptions of Mount Olympus C) dust storms capable of covering the entire planet D) Both A and C are correct. E) All of the above are correct.
A glass rod is rubbed with a piece of silk. During the process the glass rod acquires a positive charge and the silk
A) acquires a positive charge also. B) remains neutral. C) acquires a negative charge. D) could either be positively charged or negatively charged. It depends on how hard the rod was rubbed.
The three laws of planetary motion by ________ allowed us to predict planetary motion
Fill in the blank(s) with correct word
Electric charge is measured in units of
a. coulombs. b. watts. c. volts. d. newtons.