What is the charge of an atom with 21 protons and 20 electrons?

How can you use chemical equations to predict the products of the reaction you can carry out?

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

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