Which part of an investigation is only found in an experimental investigation?

A. a hypothesis

B. a control group

C. a procedure

D. a conclusion

When Ca+2 and O-2 form a compound what is the overall charge of the compound formed

What happens to the particles of a substance that changes state from liquid to gas?

If Earth had only half as much mass as it currently does, how would this affect the force of gravity between the moon and Earth? A. The force of gravity would remain the same. B. The force of gravity would be half what it currently is. C.

Consider the equation below. N2 + 3H2 - > 2NH3 What is the mole ratio of hydrogen to ammonia? A. 1:1 B. 1:2 C. 3:2 D. 5:4

In the X-Men comic book series, there is a character called Kitty Pryde who can walk right throughout walls. In our movie theater example, the wall of the theater represents the cell membrane.

Of the elements magnesium, calcium, and barium, which forms the ion with the largest radius? the smallest? what periodic trend explains this?

Balance the equation _H2O2->_H2O+_O2

A balanced chemical reaction obeys the law of ... A) ideal gases. B) definite proportions. C) conservation of matter. D) conservation of energy.

What is the net ionic equation for the reaction between nickle (II) chloride and silver (I) nitrate?

What is the velocity of a wave with a wavelength of 0.03 m and a frequency of 120 Hz?