In a group assignment, students are required to fill 10 beakers with 0.720 m cacl2. if the molar mass of cacl2 is 110.98 g/mol and each beaker must have 250. ml of solution, what mass of cacl2 would be used?
1)3.13 g
2)38.5 g
3)200 g
4)617 g

Total volume = 10*0.250 liters = 2.5 liters
M = n / V (liters)
Total moles: n = M*V = 0.720mol/liter *2.5 liter =1.8 mol

MM = grams / n --> grams = n*MM = 1.8 mol * 110.98 g/mol = 199.8 grams

option 3) 200 g.

Ithink it’s a forms a perfect sphere or a smooth flattened oval

Answer : option c) heat is released during the process.explanation :

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.