Help with this please

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

Arrange the elements in order of increasing electronegativity. use the periodic table to you arrange the elements. p o k mg

When carbon disulfide is formed from its elements, heat is absorbed. calculate the amount of heat in (kj) absorbed when 5.66g of carbon disulfide is formed