The SI unit of particles of matter equal to 6.02 × 10²³ particles is the?

The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Which of these features are formed when hot groundwater is forced out through cracks in the earth's surface?