Culinary Chemistry Exam 1 Questions and Answers 2024 Graded A.

Culinary Chemistry Exam 1 Questions and Answers 2024 Graded A. A chemical process of reflux can be used to determine the amount of ______ in foods. - ANSWER Fat _________ are known to build and repair tissue. - ANSWER Proteins The FDA allows for _______ % leeway in information reported on nutrition labels. - ANSWER 5 A cheeseburger from a fast food restaurant contains 19 g of fat, 20 g of carbohydrate, and 28 g of protein. How many kcal of energy does the cheeseburger contain? (The caloric values are: 4 kcal/g for carbohydrate, 9 kcal/g for fat, and 4 kcal/g for protein.) Give the answer to 2 significant figures. - ANSWER 360 kcal Fats are usually _________ at room temperature. (check all that apply) - ANSWER Solids, Oils What is a Calorie? - ANSWER Energy required to heat 1 kilogram of water by 1 degree celcius Atwater determined the proteins have [x] calories per gram, carbs have [y] calories per gram and fats have [z] calories per gram. (Use the numerical values i.e. 1, 2, 3...) - ANSWER 4,4,9 In the Kjedohl method, [x] is measured to determine the amount of [y] in food. - ANSWER Nitrogen, Protein Fats are primarily found in - ANSWER Cheese, Fish, Oils What did Atwater measure in order to determine calories? (Check all Correct Answers) - ANSWER Oxygen consumed, Carbon dioxide released, Heat released, Food consumed, Oxygen consumed Atom - ANSWER The smallest particle into which an element can be subdivided Culinary Chemistry Exam 1 Questions and Answers 2024 Graded A. Molecule - ANSWER Two or more atoms bonded together Element - ANSWER Pure substance made of the same kind of atom Chemical bond - ANSWER Formed when atoms gain, lose or share electrons In an atom, the nucleus contains - ANSWER all the protons and neutrons. Which of the following is a homogeneous mixture? - ANSWER Tea Which of the following is a physical property of both liquids and gases? - ANSWER has randomly arranged particles Which of the following is a physical change? - ANSWER Ice melts Which of the following is a heterogeneous mixture? - ANSWER Noodle soup Proton - ANSWER Positive Neutron - ANSWER Neutral Electron - ANSWER Negative Which of the following is a property of a solid? - ANSWER The particles have fixed positions and are very close together. Which of the following is a chemical change? - ANSWER burning natural gas Which of the following is not an element? - ANSWER Water The ability of an atom to attract the shared electrons in a covalent bond is its - ANSWER electronegativity The atomic size of atoms - ANSWER decreases going across a period. An ionic compound - ANSWER has a net charge of zero. The correct formula for the compound formed from Mg and S is - ANSWER MgS. According to naming rules, the types of compound that use prefixes in their names are - ANSWER covalent compounds Select the correct symbol for the element named. sodium - ANSWER Na A group of covalently bonded atoms that has an overall electrical charge is called a(n) - ANSWER polyatomic ion. The compound MgCl2 is named - ANSWER magnesium chloride. Identify the metalloid in the following list. - ANSWER germanium How many electrons will chlorine gain or lose when it forms an ion? - ANSWER gain 1 The only things we can smell are volatile chemicals. - ANSWER True Compounds that are known for making up the majority of pleasurable smells are - ANSWER esters The shape of the water molecule (H2O) is - ANSWER Bent The color of objects that we see is the __________ light from the object. - ANSWER Reflected Enantiomers are molecules with non superposable mirror images. Though they have the same molecular formula and bond sequencing, they can exhibit different chemical properties such as smell. - ANSWER True Temperature has no effect on how well you can smell food. - ANSWER False Which color has the highest amount of energy? - ANSWER Blue A non polar molecule has an even distribution of electron density (pulling) around the central atom. - ANSWER True.