Questions in chemistry

Questions in chemistry

[Terjawab] Which of these sentences is true about nitrogen? A. As nitrogen is the rarest gas in the atmosphere, very few organisms can use it directly. B. Even though nitrogen is an abundant gas in the atmosphere, very few organisms can use it directly. C. Even though nitrogen is an abundant gas in the atmosphere, no organisms can use it directly.

[Terjawab] What is the pH of a solution with a concentration of [tex]2.4 \times 10^{-5}[/tex] molar [tex]H_3O^+[/tex]? Please show or explain the work used to solve this problem.

[Terjawab] How much energy is released when 2.65 kg of diethyl ether \((\text{C}_2\text{H}_5)_2\text{O}\) freezes? The heat of fusion for diethyl ether is 7.27 kJ/mol.

[Terjawab] A chemical system at equilibrium is referred to as dynamic because the: A) rates of the forward and reverse reactions continue changing B) forward and reverse reactions continue reacting C) value of the equilibrium constant (K) changes D) concentrations of the components continue changing

[Terjawab] List the steps that show how the sun provides the energy for surface ocean currents.

[Terjawab] List five examples of electromagnetic radiation.

[Terjawab] For the main group elements (excluding the transition elements), is it necessary to memorize the type of ion each element makes, or can you predict the ion charge using a periodic table?

[Terjawab] ________ are tiny cell structures that carry out specific functions within a cell.

[Terjawab] The rigid layer of nonliving material that surrounds the cell of plants and other organisms is called the _____.

[Terjawab] What family does palladium belong to?