Chemistry Answers

Determine the solubility of the following ionic compounds when added to water by inserting (aq) (s) in formula. Explain how you arrived at your anwer

Sr(HO)2

True or False.

1. Polyhaloalkanes are compounds obtained by replacing two or more H atoms in a hydrocarbon with halogen atoms.

2. A functional group is an atom or a group of atoms the presence of which confers characteristic properties to the compound.

3. Polymers are very large molecules made of repeating structural units called monomers.

4. The group of lipids are subclassified based on whether they can udergo saponification or not.

5. Biomolecules are non-carbon-containing compounds which are of biological importance as they make up and carry out by their chemical reactions the needs of the living organism where they are.

6. Carbohydrates possessing sweet taste are called glucose.

7. Carbohydrates are a group of various oily or waxy substances with long-chain hydrocarbon groups present in or derived from living organisms.

True or False.

1. Carbon atoms have the unique ability to form weak bonds with each other in different ways.

2. Carbon forms four covalent bonds, using hybrid atomic orbitals in bond formation.

3. Hybridization involves the mixing and arrangement of pure atomic orbitals resulting in combinations of s, p, and d orbitals, which are identical in stability and reactivity.

4. Alkenes are open-chain hydrocarbons with single covalent bonds between the carbon atoms.

5. Alkanes are open-chain hydrocarbons with at least one double bond between carbon atoms.

6. Hydrocarbons contain only hydrogen and carbon atoms and are the simplest organic compounds.

7. Condensed ring systems are those that consist of two or more benzene rings joined together in chains or rings.

8. Hydrocarbon derivatives are compounds obtained when other elements are added or substituted to the hydrocarbon components during physical reaction.

Calculate the pH of black coffee with a hydrogen ion concentration of 4.55 × 10⁻⁶ mol dm⁻³. Show all steps of your calculations and include the correct units where needed. Give your pH value to three significant figures. Is coffee an acidic or basic solution? Explain your choice.

How many grams of CO are needed to react with 1.84 mol of Fe2O3? Express the mass in grams to three significant figures.

How many grams of CO are needed to react with 3.32 g of Fe2O3? Express the mass in grams to three significant figures.

How many grams of water is produced when 0.45 moles of oxygen is burned

What is transport number of an iron. How it is related to ionic mobility. Explain hittor'f method for determing transport number of an iron.

Within the cylinders of a car’s engine, the hydrocarbon octane (C8H18), one of many components of gasoline, mixes with oxygen from the air and burns to form carbon dioxide and water vapor. Write a balanced equation for this reaction.

How many kilojoules are released when 1.95 mol

of H202 reacts?