The vapor pressure of ethanol is 400 mmHg at 63.0°C and is 100 mmHg at 34.9°C, calculate A Hyap (kJ/mol).​

What’s the percent by mass of carbon in c10h14n2

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 is true of a liquid? it has a definite volume but not a definite mass. it has a definite mass but not a definite volume. it has a definite volume but not a definite shape. it has a definite shape but not a definite volume.