How many grams of CaCl, are needed to make a 15% by mass solution with 520g of water?

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

What metric units would you use to measure the thickness of a key

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