Tính pH của dung dịch H3PO4 0.01 M. Biết acid H3PO4 có các giá trị pKa lần lượt là: 2.12; 7.21; 12.36

Numbers with a end value of 4 or lower are rounded up, while with an end value of 5 or higher are rounded down. true or false?

What is the percent by mass of oxygen in fe2o3

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