Chemistry

Assuming equal concentrations and complete dissociation, rank these aqueous solutions by their freezing points from highest to lowest. CoCl3, NH4Cl, Li2SO4 The order of increasing freezing points is   Explanation: The expression of depression in freezing point is given as: where, = Depression in freezing point i = Van’t Hoff factor = freezing point constant […]

The dehydration of an alcohol in the presence of a strong acid yields Alkenes Explanation: Alkenes are unsaturated compounds which contains at least one carbon- carbon double bond. The dehydration reaction of alcohols results in alkene. It is carried out by heating the alcohols in the presence of a strong acid, such as H2SO4 at

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

Explanation: To answer this question successfully, we need to remember that atoms are neutral species, since the number of protons, the positively charged particles, is equal to the number of electrons, the negatively charged particles. That said, we may firstly find an atom which has 3 electrons (and, as a result, 3 protons, as it

Then, Therefore, it forms 2 covalent bonds. Hope this helps ! Photon are formed by nitrogen if each of its unpaired electrons participates in one bond. Further Explanation: The bond that is formed by the mutual sharing of electrons between the bonded atoms is called a covalent bond. It is also known as a molecular

Use the value of the Avogadro constant, which is 6.02214129 x 10^23 mol-1. Find the atomic mass of the element by using the periodic table of elements. For example, the atomic mass of sulfur (S) is 32.07 g/mole. Divide the atomic mass of the element by the Avogadro constant to calculate the mass of the single