6. 4. 3. kilojoules needed to melt 24.0 g of ice at 0 C, warm the liquid to 100 C, and change it to steam at 100 C. Nearly everything within the known universe, from water, to a fish, to the planets, is composed of matter. Every spoonful of the cereal is different; it will contain a different amount of certain oat and marshmallow shapes. Chocolate pudding is made of cacao beans, sugar, oil, and and other additives, depending on the recipe. Co. - soft, shiny metals 2. 1. Charles has increased his activity by doing more exercise. 2. joules to melt 17.0 g of ice a) F The solid structure of a substance breaks down as liquid forms. Why can't you use the same technique to separate both types of mixtures (heterogeneous and homogeneous)? The particles in an ice cube are held in a rigid structure. 3. The mixture is heterogeneous because if several samples were taken, each sample would contain a different number of chocolate chips, making every sample "unequally chocolatey.". You may get different numbers of chocolate chips with each bite. 2. nonmetal 16.7 kJ released, Draw a heating curve for a sample of ice that is heated from 20C Cl Explain the difference between a pure substance and a mixture. which is the total number of protons and neutrons in its nucleus. 8. strontium, 1. Sand may appear homogeneous from a distance, yet when you magnify it, it is heterogeneous. Example: to determine the heat needed to melt a sample of ice, the mass of ice, in grams, is multiplied by the heat of fusion. Is each of the following statements true or false? How can you tell just by looking if a mixture is most likely homogeneous or heterogeneous? A heterogeneous mixture consists of two or more phases. 415 J to cal The reason that chocolate pudding is not considered a pure substance even though it looks the same from every angle is that chocolate pudding is made up of many ingredients. the simplest type of a pure substance, is composed of only one type of material. Explain. 2. a blueberry muffin 2. Therefore, water contains two hydrogens for every one oxygen. are one-or two-letter abbreviations for the names of the elements, Write the symbols for the following elements: Water on the street turns to ice during a cold wintry night. Classify each of the following as a pure substance (element or compound) or a mixture (homogeneous or heterogeneous): What is a homogeneous mixture? Explain. They are quite unreactive and are seldom found in combination with other elements. A mouthwash used to reduce plaque and clean gums and teeth contains several ingredients, such as menthol, alcohol, hydrogen peroxide, and a flavoring. 2. 3. But this chip is chocolate, which is made up of multiple substances including cocoa/cacao, sugar, and other ingredients. A child who fell through the ice on a lake has hypothermia with a core temperature of 32 C. a) Most atoms have more electrons than protons What is meant by the homogeneous mixture? sulfur = S 2. joules lost when 25 g of water cools from 86 C to 61 C the components do not have a uniform composition throughout the sample. Explain the difference between a homogeneous mixture and a heterogeneous mixture. 8. gold, Write the name for the symbol of each of the following elements found in the body: 2. 1. -strong attractive forces hold the particles close together. N oxygen A tree is cut into boards at a sawmill = physical 37.0C=F A chocolate chip would be considered a homogeneous mixture, assuming that there werent swirls or other materials mixed into it. Gold is hammered into thin sheets I 7. the horizontal line at the boiling point is longer than the horizontal line at the melting point. a) Ca 3. Water freezes on a pond. What is completely flat soda an example of? 36. Gas particles change directly to a solid. Explain the difference between homogeneous catalysis and heterogeneous catalysis. 1. orbitals in the 3d sublevel 2. Sugar and sand form a heterogeneous mixture. a) all matter is made up of small pieces called atoms a. a gold ring b. salt water c. granite d. sucrose. 5. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. - They usually melt at higher temperatures than nonmetals. Ba 4. ), kilocalories: 210 kcal Explain. Explanation: Wines and other liquors contain ethanol, which is the chemical commonly-known as "drinking alcohol," water, and different flavorings. Drag each item to the appropriate bin. Food is digested = chemical, Describe each of the following as a physical or chemical change: Explain. -particles that move very fast Give some examples. 7. Classify each of the following mixtures as being homogeneous or heterogeneous. (Hint: The solution will require three energy calculations.). 396 kJ released. They have the same appearance and . See Answer These seemingly-mismatched elemental symbols actually correspond to a Greek or Latin word that can be used to describe the element. . Is rum classified as a mixture or a pure substance? 3 0 obj
Zn 2. -maintenance of heart and blood vessels, muscle Explain. Explain. There is a maximum of 10 electrons in the 5d sublevel. Ice cubes in a soda are a heterogeneous mixture. P =phosphorus, Write the name of the element for each symbol: Sublimation Chocolate chip cookie dough is a heterogeneous mixture. The difference between homogeneous and heterogeneous is whether not the composition and appearance of the substance is consistent throughout. tin =Sn Chocolate chip cookies are a heterogeneous mixture. Physical B) A compound can be physically separated into its components; a mixture cannot be physically separ. c) 2 2. What do homogeneous and heterogeneous have in common? The particles within a liquid have enough energy to overcome their attractive forces and become a gas. Concrete is a heterogeneous mixture of an aggregate: cement, and water. Lava flows into the ocean and steam forms. b) 2 The first step to answering this question is to understand what a pure substance is, scientifically and chemically. 1. A homogeneous mixture is a solid, liquid, or gaseous mixture that has the same proportions of its components throughout any given sample. Is water classified as an element, a compound, a homogeneous mixture, or a heterogeneous mixture? 4. orbitals in the n=3 energy level. 2. tea Explanation:Each of these coins is uniquely-sized and -shaped, making the mixture non-uniform. 4. Its state, size, or appearance will change, but its composition remains the same. 4. Chemical Explain. -25C to C -25 C, Solve the following temperature conversions: nucleus. How can you tell that you have one or the other? Mixtures, which can be homogeneous or heterogeneous,can be separated into their individual components because the substances are not chemically-connected or bondedto one another. { "2.01:_Matter" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.
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