General Chemistry Answers

Explain the reaction involved in the determination of dissolved oxygen in water using Winkler methods.

1. How many grams of Na2SO4 will be produced with the 3.10 grams of H2SO4?

A0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Describe the step by step procedure on how to prepare 450.0 mL of a physiological saline solution.

The number placed in front of a formula is called a coefficient.  The small number within a chemical formula is called a subscript.  Why do we adjust coefficients when balancing chemical equations and not subscripts?

Describe the purpose of the balance scales and bar charts in the simulation.

80 g of hydrogen peroxide, H2 O2 (aq) react and give water and oxygen gas. 1. write the balanced reaction equation for the reaction. 2. how many grams of water is made?

If 2.50 g SO2 reacts with oxygen and water, how many grams of

H2SO4 are produced? What is the limiting reactant?

 A radioisotope decays to give an alpha particle and protactinium-233. What was the original nucleus

Postulates the solar system atom model with its limitation Explain it

At the interaction of AgNO₃ and K₂CrO₄ solutions a sol of Ag₂CrO₄ with negatively charged grains is formed. Determine, which electrolyte is taken in excess at its obtaining and write down the scheme of micelle structure of this sol. Arrange in row of increasing of coagulation thresholds the following electrolytes: MgSO₄, Al(NO₃)₃ and K₄[Fe(CN)₆] in relation to this sol.