Determine if the following is an acid or base, then write out the reaction based on the Arrhenius model. 1. HNO3
2. KOH
3. Ca(OH)2
4. HBr

Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail

*will mark you brainliest + 15 points ** why does the equilibrium of a system shift when the pressure is increased? a. to maximize the stress on the system b. to stop restoring equilibrium to the system c. to increase the total moles of gas in the system d. to decrease the total moles of gas in the system

How many moles of gas are present if p=11 atm, v=12l, t=185k?