Astudent is instructed to make 0.250 liter of a 0.200 m aqueous solution of ca(no3)2. what is a correct numerical setup for calculating the total number of moles of ca(no3)2 needed to make 0.250 liter of the 0.200 m calcium nitrate solution?

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

When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is m.

Let the ed50 of a recreational drug be defined as the amount required for 50% of a test group to feel high or get a buzz. if the ed50 value of ethanol is 470 mg/kg body mass, what dose would a 70 kg party goer need to quickly consume in order to have a 50% chance of getting a buzz? 235 mg 470 mg 32,900 mg 35,000,000 mg