How many moles of Co 2+ are present in 0.200 L of a 0.400 M solution of CoI 2?

Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?

Type the correct answer in each box.balance the chemical equation.__ n203 ➡️ __ n2 +__ o2

1.17 mol hcl and 2.5 mol naoh react according to the equation hcl + naoh -> nacl + h2o . if the limiting reactant is hcl, determine the amount of excess reactant that remains. answer in units of mol.