Chemistry Answers

How many grams of dilute is present in 0.4 moles magnesium hydroxie, Mg (OH)2 in 559 g water, H2O? molar mass of Mg (OH)2 is 58 g / mol

If 0.590% solution of Na₂CO3 will be used to precipitate Ca⁺² from solution, determine the amount of solution, in grams needed to percipitate 5.00x10²mL of 0.01120M Ca⁺²

25.0 grams of sodium chloride (NaCl) is dissolved in 100 grams of solution. What is the concentration of the solution in parts per million (ppm)?

Suppose 17 grams of sucrose is dissolved in 183 grams of water. What is the concentration of sucrose ppm?

How does iron binding by polyphenols provides antioxidant, antibacterial and anticancer effects?

4. NaOH react completely with Al(NO3)3.

c. What mass of aluminum hydroxide is produce from 25 ml 1.0 M Al(NO3)3.

What is the molality of a solution formed from 29.1 g of C7H8 (toluene) dissolved in a 832 g of benzene (C6H6)?

Lead(II) sulfate formed in the reaction of 145 mL of 0.123 M lead(II) nitrate and excess sodium sulfate.

c. Calculate the mass of lead(II) sulfate formed in the reaction

2. What is the concentration of an HNO3 solution if 25.0 ml reacts with 38.5 ml of 0.145 M K2PO4?

1. 0.315 moles of butane (C₄H₁₀) was burned in a copper calorimeter containing 4500 g of water. The calorimeter weighs 2,500 g. The temperature was observed to increase by 3.15 °C. Calculate the molar heat of combustion of butane (HEAT OF COMBUSTION PER MOLE). The specific heat of copper and water are 0.386 J/g. °C and 4.18 J/g. °C respectively.