Explain. Element 4. kilojoules to heat 175 g of copper from 28 C to 188 C, 1. a) Baby oil b) Chocolate chip Cookie c) Water and gasoline d) Wine e) gasoline 2) Classify each of the substance as a pure substance or a mixture. Whole-number subscripts indicate how many of the previouselement are present in the compound. -same shape as their container After a session of using weights, he has a sore arm. How would you separate Fe3+ from Ba2+ in a mixture? If 100. mL of the solution contains 5.0 g of glucose (carbohydrate), how many kilocalories did the patient obtain from the glucose solution? P =phosphorus, Write the name of the element for each symbol: 99.2 cal 2. lithium A pure substance is one that is made up of one building block. While it wouldnt be easy to separate the ingredients in chocolate, it could be done without a chemical reaction. 2. d) 4 2. 3. Group 4A (14), Period 2 Milk left in a warm room turns sour, 1. chocolate chip ice cream = Heterogenous 3p sublevel A homogeneous mixture appears uniform, regardless of where you sample it. b) Electrons have a charge of -1 (a) normal urine (b) gasoline (c) batter for chocolate chip cookies arrow_forward Rainwater comes from the oceans. Bubbles are carbon dioxide. Identify each of the following as describing either a proton, a neutron, or an electron: 5. Vegetable Oil. 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. 2. has a 1+ charge 2. Mixture components can be solids, liquids, or gasses that retain their. Compounds cannot be classified in this way. are atoms of the same element that have the same atomic number but different numbers of neutrons. Classify each of the following as a physical or chemical change: Chocolate chip cookies are a heterogeneous mixture. 415 J to cal At a temperature called the melting point (mp)? -particles that move very fast Is a chocolate chip cookie an example of a heterogeneous or homogenous mixture? As was the case with the physical properties of chemistry that were defined in the previous chapter, specific rules must be followed when writing elemental symbols. 2p orbital Explain. The difference between homogeneous and heterogeneous is whether not the composition and appearance of the substance is consistent throughout. 4. manganese (a) baby oil (b) chocolate chip cookie (c) water and gasoline (d) wine Question Classify each mixture as homogeneous or heterogeneous. Group 2A (2), Period 4 Deposition, Calculate the heat change at 0 C for each of the following, and indicate whether heat was absorbed/released: - a nucleus, located in the center of the atom, that Part 1 1. The salt water described above is homogeneous because the dissolved salt is evenly distributed throughout the entire salt water sample. The chemical formula for this incredibly important substance is "H2O". 1. How can you tell that you have one or the other? Explain your answers. A chocolate-chip cookie. 5. The chemical formula for water contains an "H," which is the elemental symbol for "hydrogen," and an "O," which is the elemental symbol for "oxygen." Is this a homogeneous or heterogeneous mixture? In chocolate chip cookies, the mixture is not evenly distributed. c) density is mass/volume Al Explain. Ca=calcium 2. 1. number of protons in an atom - Melting point: 113 Celsius (a) KCl is the solute in a homogeneous mixture (b) KCl is the solute in a heterogeneous mixture (c) KCl is the solvent in a homogeneous mixture (d) KCl is the solvent in a heterogeneous mixture. 2. Advertisement Advertisement True or False: Physical processes can be used to separate mixtures because there are no chemical interactions between the components. Is sweetened tea a pure substance, a homogeneous mixture, or a heterogeneous mixture? A salad dressing is prepared with oil, vinegar, and chunks of blue cheese. Takes place, the original substance is converted into one or more new substances, which have new physical and chemical properties. sulfur 16p, 16e, How many protons and electrons are there in a neutral atom of the following? b) 2 In the article that follows, well explain more about why it is that chocolate cannot be considered a pure substance, and answer chocolate science questions you didnt even know you had. How would you classify the following material? 2. A heterogeneous mixture contains particles of different shapes or sizes and the composition of one sample may differ from that of another sample. Carbon a tightly wound spring = potential energy Is concrete classified as a pure substance (element or compound) or a mixture? Why can't you use the same technique to separate both types of mixtures (heterogeneous and homogeneous)? Is ice classified as an element, a compound, a homogeneous mixture, or a heterogeneous mixture? Drag each item to the appropriate bin. - Melting point: 630 Celsius, Identify the group or period number described by each of the following: This same amount of heat is released when 1 g of water vapor (gas) changes to liquid at 100 C. coffee (with milk) a. a heterogeneous mixture b. a solution c. a suspension d. an element. -Metals are good conductors of heat and electricity. Tamang sagot sa tanong: Write the word Homogeneous if the sample belongs to homogeneous and the word Heterogeneous if it is belongs to heterogenous. In the United States, we still use the Fahrenheit temperature scale. 4. Mixtures that appear to be homogeneous are often found to be heterogeneous after microscopic examination. Element b) S N Explain. 1. Would you use the atomic number, mass number, or both to determine each of the following? A heterogeneous mixture is : made of different substances that remain physically separate (General Chemistry Online). 5400 cal absorbed Salt and pepper form a heterogeneous mixture. A mixture contains two or more substances. The derivation of chemical formulas and chemical names will be the focus of the following chapter. ignites spontaneously in air when finely divided= chemical, Describe each property of the element zirconium as physical or chemical Pure substances can be categorized as either elements or compounds. 3. metal Explain. Classify each of the following mixtures as being homogeneous or heterogeneous. In this. 2. - However, the mass number does not appear on the periodic table because it applies to single atoms only. - 80. cal (334 J) of heat is needed to melt exactly 1 g of ice at its melting point (0 C). A chocolate chip cookie is a heterogeneous mixture. C Food is digested = chemical, Describe each of the following as a physical or chemical change: hydrogen = H Hydrogen reacts readily with oxygen. 3. ice (H2O) The particles in an ice cube are held in a rigid structure. e) 5, A) all matter is made up of small pieces called atoms, Which IS a part of Dalton's Atomic Theory? a. pure substance b. element c. both homogeneous and heterogeneous mixtures d. homogeneous mixture e. heterogeneous mixture. Mixtures of Pure Substances. . . A homogeneous mixture has the same uniform appearance and composition throughout. How many occupied energy levels are there in an atom of Li? Determine whether each of the following is homogeneous or. Chocolate chip cookies are a heterogeneous mixture. However, each of these "things" has its own distinct characteristics and, therefore, can be classified using more specific terminology. The dough itself will not be uniform. 3. 3. orbitals in the 6s sublevel Explain. 4. ends with neon, 1. What is a solution? Mixtures: Mixtures can be a combination of elements,. Classify each of the following pure substances as an element or a compound: Is concrete homogeneous or heterogeneous? Aluminum, which is found in soda cans, is an element. Is this a homogeneous or heterogeneous mixture? Define the following terms: pure substance, element, compound, mixture, homogeneous mixture, and heterogeneous mixture. Chemical carries a negative charge = electron, Decide if it is a proton, neutron, or electron described in each of the following: (Or Mixture, Solution, or Element? . -The ionization energy decreases going down a group, and the ionization energy increases going from left to right across the periodic table. Salt and pepper form a heterogeneous mixture. What is an example of a Heterogeneous mixture? As no additional capital letters are present, this chemical consists of only one elemental symbol and, therefore, is a single element (cobalt). Which of the following is an example of a homogeneous mixture? 2. How much energy, in kilocalories and kilojoules, is in the clam chowder? Mixture Potential, Convert each of the following energy units: Explain. 4. While water contains two hydrogens for every one oxygen, hydrogen peroxide (H2O2) contains a two-to-two ratio of hydrogen to oxygen. 2. 5. - Are similar to each other and different from those of 6. 1. has the smallest mass How do mixtures differ from pure substances. Period 2 What is the meaning of homogeneous and heterogeneous? What are some of the techniques by which mixtures can be resolved into their components? Water vapor is converted back to liquid as the water particles lose kinetic energy and slow down. Chocolate cake homogeneous or heterogeneous ogogogg Answer: Its a homogenous mixture Explanation: iamnotexisting Answer:Heterogeneous Mixture Explanation: A heterogeneous mixture is a mixture consists of two or more phases. 1. - have relatively low melting points Fruit salad42. 3. A) The components of a mixture do not have the same properties individually as they do when mixed. 1. calcium No, chocolate is not considered a pure substance. Chemical Ahomogeneous mixturehas a uniform composition, meaning that if several samples are taken, each would contain the same chemicals in approximately the same ratio. Water freezes on a pond. Is fruit salad classified as an element, a compound, a homogeneous mixture, or a heterogeneous mixture? 2. True or False: When heat is added to a solid, the particles move faster. Answer and Explanation: A homogeneous mixture is the one which has the same uniform appearance and composition while heterogeneous mixture is the one which has visibly different substances and they are really unmixed. It contains water, sugar, and carbon dioxide, which forms bubbles. Pb A patient receives 3.2 L of intravenous (IV) glucose solution. 1100 cal, The energy needed to keep a 75-watt light bulb burning for 1.0 h is 270 kJ. Each portion of the heterogeneous mixture may have a different ratio of the components in it. - Melting point: 962 Celsius c) Mg How would one describe pure substances and mixtures? Each of the layers is called a phase. A chocolate chip cookie, on the other hand, is a cookie with bits and pieces of chocolate spread out in the cookie. Answer b: Heterogeneous Salt gets completely dissolved in water and salt water exists in a single phase only. What did Rutherford determine about the structure of the atom from his gold-foil experiment? What is the difference between homogeneous and heterogeneous mixtures give examples? 335 K 4300 kcal released How do mixtures differ from pure substances? (a) salt dissolved in water (b) tea and ice (c) chicken noodle soup (d) mud (e) gasoline (f ) carbon di, What is the difference between a compound and a mixture? What is meant by the homogeneous mixture? 4. Both of these chemicals contain two hydrogens, but exchanging the oxygen for a sulfur results in a chemical that behaves very differently. 3. 2. e) atomic numbers identify elements, What is the difference between two isotopes of an atom? two protons Explain the difference between a homogeneous mixture and a heterogeneous mixture. 2. c. A log is cut for firewood. Therefore salt water is a homogeneous mixture. Chocolate chip cookies are a heterogeneous mixture. Answer a: Heterogeneous (Hint: The solution will require three energy calculations.). Ba 2. 5. f. styrofoam. 37.0C=F Answer b: Element 3. is found outside the nucleus At room temperature, mercury is a liquid, Gold is hammered into thin sheets = physical 4. zinc (Zn) If you took one bite of a cookie, the bite should be the same as all the rest of the bites of the cookies. Potential These individual components are uniformly blended with one another, so every"sample"taken when drinking a glass of wine would have the same color, aroma, and flavor. Compound Explain the difference between homogeneous catalysis and heterogeneous catalysis. 7. a. ; Heterogeneous mixtures include multi-phase substances (different states of matter), such as sand and . Na = sodium c) Cu Indicate the number of each in the following: Explanation:Since the "o" is lower-case, it must be the second letter of the elemental symbol beginning with a capital "C". Therefore, every "sample"taken when eating the soupis different. Classify each of the following mixtures as homogeneous or heterogeneous: 1. How many kilojoules are released when 75.0 g of steam at 100 C condenses, cools to 0 C, and freezes at 0 C? 2. the noble gas in Period 1 which is the total number of protons and neutrons in its nucleus. 3. 1. baking soda (NaHCO3) Chocolate chip cookies are a heterogeneous mixture. Physical If a mixture, indicate whether it is homogeneous or heterogeneous: (a) rice pudding, (b) seawater, (c) magnesium, (d) crushed ice. 2. is a gas at room temperature 1. contains C, N, and O Cd Is rainwater more pure, less pure, or of the same purity as ocean water? Therefore, water contains two hydrogens for every one oxygen. Explanation:The capitalization ofletters within a chemical formula can be used to divide that formula into unique elemental symbols. 5. trimix (oxygen, nitrogen, and helium) in a scuba tank, 1. 3. n=3 Is raisin bread classified as an element, a compound, a homogeneous mixture, or a heterogeneous mixture? Sr, Write the symbols for the following elements: 3. Elements Give some examples. A chocolate chip would be considered a homogeneous mixture, assuming that there werent swirls or other materials mixed into it. A chocolate-chip cookie does not have a uniform composition, which makes it a heterogeneous mixture. (a) Fine sand and coarse gravel (b) Vegetable oil, Styrofoam, and wat. What are the examples of homogeneous? 5. iron Explain why a chlorinated swimming pool would be considered a homogenous mixture. The solid structure of a substance breaks down as liquid forms. 4. number of electrons in a neutral atom, 1. (Take the masses of the proton and neutron to be the same.). 1. vegetable soup 3. Chocolate chip cookies are a heterogeneous mixture. 36. But this chip is chocolate, which is made up of multiple substances including cocoa/cacao, sugar, and other ingredients. 1. 2. A pure substance is generally a substance which is made up of one mind of building block. % Describe an example of a homogeneous and heterogeneous mixture. There is a maximum of 32 electrons in the n=4 energy level. - Are tiny particles of matter. endobj 2. This image also includes simple "yes-or-no" tests that can be used to help distinguish a pure substance from a mixture, an element from a compound, and a homogeneous mixture from a heterogeneous mixture. b) the number of protons d) Rb, How many electrons does an atom of He have? The components are not evenly and uniformly mixed so they remain distinguishable from each other. is determined by the position of an object or by the chemical composition of a substance. Ice cubes in cola form a heterogeneous mixture. sulfur Explanation: Wines and other liquors contain ethanol, which is the chemical commonly-known as "drinking alcohol," water, and different flavorings. If no subscript is written, an unwritten "1" is understood, as was the case for several of the numerical quantities that were discussed in the previous chapter. Condensation How would you classify the following material? Answer 8 people found it helpful mn93 Answer: Heterogeneous Explanation: Because it's mix the dough and chocolate chips Advertisement Answer No one rated this answer yet why not be the first? - Are not especially shiny, ductile, or malleable, and they are often poor conductors of heat and electricity. blood. 4d sublevel. a car speeding down the freeway= kinetic energy Ice cubes in cola form a heterogeneous mixture. 3600 J, 850 cal. Answer c: Homogeneous a) C The low specific heats of aluminum and copper mean they transfer heat efficiently, Use the heat equation to calculate the energy for each of the following (see Table 3.11): A mouthwash used to reduce plaque and clean gums and teeth contains several ingredients, such as menthol, alcohol, hydrogen peroxide, and a flavoring. There are two kinds of pure substances: elements and compounds. Explain why a suspension is considered a heterogeneous mixture? The ice cream itself will not be uniform, as the dough bites will also be spread out unevenly throughout the material, even though ice cream makers work very hard to make sure that every bite of ice cream is as close as possible to the same. By contrast, a mixture that is uniform in composition is a homogenous mixture. 120 J Is maple syrup an example of a homogeneous or heterogeneous mixture? Physical a. platinum. JoVE is the world-leading producer and provider of science videos with the mission to improve scientific research, scientific journals, and education. Chocolate chip cookies are a heterogeneous mixture. 4. 6. Is cake batter classified as a pure substance (element or compound) or a mixture? . calcium Accept any reasonable answer. 4. 3. for a substance is defined as the amount of heat needed to raise the temperature of exactly 1 g of a substance by exactly 1 C. A tossed salad is a heterogeneous mixture. 7. tin -25C to C -25 C, Solve the following temperature conversions: If it is a mixture, classify it as homogeneous or Question: Classifying Matter 1) Classify each mixture as homogeneous or heterogeneous. Give an example of a homogeneous mixture. Find ARA_RAR and produce a matrix R\Omega_{R}R such that RA=AR.\Omega_{R} \mathbf{A}=\mathbf{A}_{R}.RA=AR. Indicate whether each of the following describes a gas, a liquid, or a solid: a. a. air b. orange juice with pulp c. raw milk d. marble. Identify each of the following changes of state as melting, freezing, sublimation, or deposition: b) energy cannot be created or destroyed Nitrogen Explain. kilojoules: 880 kJ. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. A swimmer expends 855 kcal during practice. 14 - Electric Stimulation. 5. has a melting point of 220 C, 1. Which of the following are homogeneous mixtures? b) 1 If you take a bite from a cookie, you may not get the same number of chips as you get in another bite. They have the same appearance and . of an element is equal to the number of protons in every atom of that element. Usually a chocolate chip is a simple piece of pure chocolate, meant for eating or mixing into another recipe. -particles that are far apart. 4. When she reads 99.8 F, she becomes concerned that she is quite ill. How would you explain this temperature to your friend? Kinetic 3. 4. nonmetal 4. 8. metal, Give the symbol of the element described by each of the following: c) the number of neutrons, Which of the following has a higher ionization energy? How much heat, in kilojoules, is absorbed to melt the ice and raise the temperature of the water to body temperature, 37.0 C? Physical. 7. boron Classify each substance as homogeneous or heterogeneous and explain your reasoning. They are quite unreactive and are seldom found in combination with other elements. Alcohol43. 4. Any system with two phases . There is a maximum of six electrons in the 3p sublevel. 2. 1. the simplest type of a pure substance, is composed of only one type of material. 98.6 F Is soil classified as an element, a compound, a homogeneous mixture, or a heterogeneous mixture? Chocolate chip cookies are . 3. lost when 15.0 g of ethanol, C2H6O, cools from 60.5 C to 42.0C Explain. 3. has a pale, yellow color For example, "Hg" is the elemental symbol for the element named "mercury," which contains neither an "h" nor an "g" in its spelling! A heterogeneous mixture is simply any mixture that is not uniform in composition it's a non-uniform mixture of smaller constituent parts. N Since the "l" is lower-case, it must be the second letter of that second elemental symbol, Cl (chlorine). Note that chemical names consist of words that resemble elemental names, and chemical formulas contain elemental symbols. other elements. 3. Na 3. fruit salad Explain. - Are rearranged to form new combinations in a A tree is cut into boards at a sawmill \\ 1. solution 2. solute 3. solvent 4. heterogeneous 5. homogeneous 6. alloy. What wavelength photon would be required to ionize a hydrogen atom in the ground state and give the ejected electron a kinetic energy of 10.0 eV? d. wood. It does not store any personal data. Explain. Pure Substance an electron and a neutron = no, Which of the following pairs of particles have the same charges? are one-or two-letter abbreviations for the names of the elements, Write the symbols for the following elements: Ammonia will corrode iron. A. milk B. sugar water C. raisin bran D. air E. none of the above. What is the difference between a homogenous and a heterogeneous mixture? Explain. P, has a mass about the same as a proton= neutron 396 kJ released. Co. - soft, shiny metals 3. What is a homogeneous mixture? A chocolate chip cookie is a heterogeneous mixture. c) Mg 3. Is well-stirred hot chocolate a colloid, a suspension, or a solution? What is difference between homogeneous and heterogeneous mixture? Is tossed salad a homogeneous mixture or a heterogeneous mixture? at the top of a ski hill about to come down, Which of the following statements about electrons are false? Explain. Explain. . solid On the other hand, homogenous is a mixture too, but the elements are not. Examples of heterogeneous mixtures include sand, oil and water, and chicken noodle soup. 1380 J, 330. cal Give examples of an element, a compound, a heterogeneous mixture, and a homogeneous mixture. 3 0 obj a. homogeneous mixture b. heterogeneous mixture c. element d. compound. Graphic on the left of "Dancing Raisins" shows liquid, solid, and gas substances in a heterogeneous mixture. Explain. 3.5 kcal Heterogeneous Mixtures: When two or more substances and mechanically mixed, they form a type of mixture whose. 4. tea with ice and lemon slices, 1. A mixture is formed by combining two or more materials. How many kilojoules of heat are needed? At room temperature, mercury is a liquid = physical, Describe each of the following as a physical or chemical property: Neon is a colorless gas at room temperature Heterogeneous -particles that are close together but mobile c. bronze. Matter is anything that has mass and volume. Wet clothes dry on a clothesline. 3. kilocalories to freeze 225 g of water 3. calcium Classify each of the following pure substances as an element or a compound. 2. What is an example of a pure substance? - good conductors of heat and electricity They cannot be broken down through physical methods such as boiling or sifting. Explain. No, for the same reasons above. 2600 J 1. Explain. Heterogeneous mixture. to 150 C. A few simple examples will be mentioned here. 6. bromine Copper is an element, which is a pure substance. Ice cubes in cola form a heterogeneous mixture. Provide three examples of each. Chocolate chip cookies are a heterogeneous mixture. <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> If the composition of a material is not completely uniform, then it is heterogeneous (e.g., chocolate chip cookie dough, blue cheese, and dirt). What is a homogeneous liquid that is mixed thoroughly? The particles of a solid gain sufficient energy to overcome the attractive forces that hold them together 2. S Chocolate chip ice cream is a heterogeneous mixture. The type of mixture chocolate is depends on the chocolate. Note that the elements are present in a one-to-one ratio, as neither elemental symbol has an explicitly-written subscript. 5. nonmetal - The atomic number is the whole number that appears above the symbol of each element on the periodic table. is also a pure substance, but it consists of atoms of two or more elements always chemically combined in the same proportion. 1810 J, 434 cal 4. Which of the following best describes the substance XeF_4? Rockhounding Around The WorldScience QuestionsLearn About Different Kinds of Rocks, About UsPrivacy PolicyTerms Of UseArchives, Is Tea A Pure Substance? These compounds can be separated by boilingthe water, leaving the salt as a residue. 2. n=2 Is milk classified as an element, a compound, or a mixture? Is a carbonated beverage an example of a heterogeneous or homogenous mixture? Because the heat of vaporization is greater than the heat of fusion what is illustrated to show this on the heating curve? is found in the larger part of the atom= electron a. What are 5 homogeneous mixtures? 3. n=4 energy level Is coffee classified as an element, a compound, a homogeneous mixture, or a heterogeneous mixture? Often it is easy to confuse a homogeneous mixture with a pure substance because they are both uniform. In most technical applications homogeneous means that the properties of a system are the uniform throughout the entire system; heterogeneous (also inhomogeneous) means that the properties change within the system. d. Homogeneous mixture. Describe each of the following as a physical or chemical property: Give examples of each. Chemical, Describe each of the following properties for the element fluorine as physical or chemical: bubbly champagne, Neon is a colorless gas at room temperature = physical a. element b. mixture c. homogeneous mixture d. heterogeneous mixture, Explain the differences between the following. 3. Is water classified as an element, a compound, a homogeneous mixture, or a heterogeneous mixture? Group 1A (1) The abbreviation "Hg" is derived from the Greek word "hydrargyrum,"which means "liquid silver"- a phrase that accurately represents the appearance of mercury!
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chocolate chip cookie homogeneous or heterogeneous