Chemistry

A0.1025-g sample of copper metal is dissolved in 35 ml of concentrated hno3 to form cu2 ions and then water is added to make a total volume of 200.0 ml. (calculate the molarity of cu2.) Molarity is defined as number of moles of solute in 1 L of solution. Here, 0.1025 g of Cu is […]

Which of these elements has an electron configuration of [Kr]5s2? Which of these elements has an electron configuration of [Kr]5s2? The element that has an electron configuration of [Kr]5s2 is strontium. The rest of the given choices do not answer the question above. Given this abbreviated electron configuration, we begin from the row of the

Unlike carbohydrates and lipids proteins contain which element? The answer to your question is: Nitrogen Explanation: Organic molecules that are part of living organisms are composed by Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus and Sulphur. The elements available in more quantity are Carbon, Hydrogen and Oxygen. Nitrogen is present in proteins and nucleic acids. carbon, hydrogen,

Calculate the change in entropy of copper when converted to a gas. In the following equation, m and n are the coefficients of the products and the reactants in the balanced reaction equation. ∆S° = [Σ mS° products] – [Σ nS° reactants] To avoid clutter, I’m omitting typing in the unit J/(mol•K) in the intermediate