Igneous rocks are formed when volcanoes erupt, then the form when the lava cools. so the answer is A.
Answer:
(upper right) corner of the periodic table to the bottom left corner
The correct answer is D.
Echo refers to the sound that is heard when a sound wave is reflected back from a surface. An echo sound is made when a sound wave traveled through the air, hit a hard surface and get reflected back. Generally, hard surfaces reflect sound wave while soft surfaces absorb sound waves. Reflected sound waves are used in application of some devices that are used in range and direction finding.
I think the answer is d not real fir sure I'll find out in the morning sorry
4.06x20^24/6.02x10^23 = 6.744 moles x 55.845 g/mole = 376.61868grams
