A sample of barium hydroxide, Ba(OH)2, is known to have become contaminated with barium carbonate, BaCO3, by reaction with CO, in the air. A 2.00 g sample is titrated with 0.450M HCI
and it is found that 55.56 mL of HCl are required for neutralization. Calculate the percentage by
mass of BaCO3 in the sample.

When you perform this reaction, what could remain at the end of the reaction? check all that apply. excess reactant aqueous copper chloride excess reactant aluminum oxygen product solid copper carbon dioxide product aqueous aluminum chloride water

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

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