Se dau elementele: F: Ba: Ar: K: Ru:Sm: As: Th: Sn: Cu. Se cere: a) ordonatl elementele in sensul cresterii razel atomice: b) ordonati
elementele in sensul cresterii caracterului metalic sau nemetalic: c)
redati procesele de ionizare: d) ordonati elementele in sensul cesterii
raze lonice
PLS HELP DAU TEST DAU COROANA

Phosphorous acid, h3po3(aq) , is a diprotic oxyacid that is an important compound in industry and agriculture. the values of phosphorous acid are 1.30 6.70 calculate the ph for each of the given points in the titration of 50.0 ml of 1.5 m h3po3(aq) with 1.5 m koh(aq) .

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device