Find the volume of C2H2(g) at STP produced when 4.50 mol of H20 react completely with CaC2? CaC2 (s) + 2 H20 (1) - CH2(g) + Ca(OH)2 (aq).​

14 days is the half-life of phosphorus-32

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.