Which of the following represents the correct neutralization reaction of hydrobromic acid and calcium hydroxide? (2 points)

Question 4 options:

1)

HBr + Ca(OH) 2 yields CaBr2 + H2O

2)

HBr + CaOH yields CaH + BrO

3)

2 HBr + Ca(OH) 2 yields CaBr2 + 2 H2O

4)

HBr + Ca(OH) 2 yields CaH2 + Br2O

The molality of calcium chloride (cacl2) in an aqueous solution is 2.46 m. what is mole fraction of the solute?

Astudent states that 9.0 g of baking soda will form an unsaturated solution in 100 g of water. what do you need to know to decide whether this statement is correct? a. the temperature of the water and the molar mass of baking soda b. the percent by volume of the solution and the solubility of baking soda c. the temperature of the water and the solubility of baking soda at that temperature

Determine the number of moles of air present in 1.35 l at 750 torr and 17.0°c. which equation should you use? n=pv/rt what is the number of moles present? ⇒ 0.056 mol a sample of n2 gas occupying 800.0 ml at 20.0°c is chilled on ice to 0.00°c. if the pressure also drops from 1.50 atm to 1.20 atm, what is the final volume of the gas? which equation should you use? v2= p1v1t2/p2t1 what is the final volume of the gas? ⇒ 932 ml these are the answers