General Chemistry Answers

Why does the Department of Environment and Natural Resources, (DENR) concern on the cauliform level, in parts per million, during the rehabilitation of beaches in Boracay? Research on the tolerable level of cauliform.

A reaction that is spontaneous as written

a patient in a hospital is often administered an intravenous (IV) drip contains an aqueous solution, this aqueous solution contains 0.85% (mass by volume) of sodium chloride or 5% (mass by volume) of glucose. calculate the molarity of both these solution.

What is the effect of the following on the volume of 1 mol of an ideal gas? The pressure is reduced by a factor of 4 (at constant T).

A silver coulometer was connected in series with another cell containing M²^+ solution of an unknown metal. M. After passing electric current for 1hr through the two cell it was found that 5.43g of Ag was deposited, while 2.83g of M was deposited in the cell. What is the molar mass of M?

Order these forces from weakest to strongest (i.e. 1 is the weakest and 3 is the strongest).

__1__London dispersion__3__(2)Dipole-dipole__2__(3)Ionic attraction

1. Classify each of the following as a single displacement or double displacement reactions. Then, predict the products of each reaction, and provide the balanced equation. (2 marks each)
2. Cl_2(g) + CsBr_(aq)→
3. AgNO_3(aq) + Na₂CrO_4(aq) →
4. MgCl_2(aq) + AgNO_3(aq) →
5. F_2(g) + NaI_(aq) →

Calculate the percent yield for the reaction: P4 (s) + 6 Cl2 (g) → 4 PCl3 (l) if 75.0 g of phosphorus reacts with excess chlorine gas to produce 111.0 g of phosphorus trichloride.

How many grams of C2H2 are needed to react according to the equation to release 2570jk of heat?

A piece of metal, weighing 59.047, was heated to 100.0 degrees C. The metal was paced into a coffee cup calorimeter containing 100.0mL of water (initially at 23.7 degree C). the metal and water were allowed to come to an equilibrium temp, determined to be 27.8 degree C. Assuming no heat was lost to the surroundings, calculate the specific heat of the metal.

1)calculate the hat absorbed by the water

2)calculate the specific heat of the metal