What is the percentage of Calcium in CaC2?
O 63 %
O 77%
O 23%
O 37 %

According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc

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

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?