4. Indicate whether each of the following describes a gas, a liquid, or a solid: Chocolate chip cookies In F, normal body temperature is 98.6. 5. 1. 3. calcium Carbon Is the energy that must be added to convert exactly 1 g of liquid to gas at its boiling point. C There is a maximum of two electrons in a 2p orbital. Physical oxygen =O Heterogeneous Mixtures: When two or more substances and mechanically mixed, they form a type of mixture whose. 3. A tree is cut into boards at a sawmill Is taking place as water particles with sufficient energy escape from the liquid surface and enter the gas phase. What is this temperature on a Celsius thermometer? Calculate the energy required to keep the light bulb burning for 3.0 h in each of the following energy units: c) Electrons are attached to protons 9.3 kcal Salt gets completely dissolved in water and salt water exists in a single phase only. 4. - Melting point: 630 Celsius, Identify the group or period number described by each of the following: 2 0 obj
At room temperature, mercury is a liquid = physical, Describe each of the following as a physical or chemical property: Is concrete classified as a pure substance (element or compound) or a mixture? 37.0C=F d. Butter melts in a warm room. Still curious about mixtures, compounds, and solutions, or whether common materials familiar to you like iron, ammonia, soil, gold, motor oil, oxygen, brick, grape juice, beer, diamond, bleach, urine, and limestone are mixtures or pure substances? Salt and pepper form a heterogeneous mixture. Is gold classified as an element, a compound, a homogeneous mixture, or a heterogeneous mixture? 3. A child who fell through the ice on a lake has hypothermia with a core temperature of 32 C. How many kilojoules are released when 75.0 g of steam at 100 C condenses, cools to 0 C, and freezes at 0 C? two electrons = yes Explain. A swimmer expends 855 kcal during practice. 1100 cal, The energy needed to keep a 75-watt light bulb burning for 1.0 h is 270 kJ. 2. kilocalories released when 15.0 g of steam condenses at 100 C and the liquid cools to 0 C If the same amount of heat is supplied to samples of 10.0 g each of aluminum, iron, and copper, all at 15.0 C, which sample would reach the highest temperature? Phosphorus will ignite when exposed to air = chemical The 1s, 2s, and 3s orbitals are all spherical, but they increase in volume because the electron is most likely to be found farther from the nucleus for higher energy levels. . The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. When 1.0 g of glucose is metabolized in the body, it produces 3900 cal. 3. the energy in a lump of coal - Are not especially shiny, ductile, or malleable, and they are often poor conductors of heat and electricity. 2. Ice is water, and the liquid part is sugar and . A) The components of a mixture do not have the same properties individually as they do when mixed. Water vapor is converted back to liquid as the water particles lose kinetic energy and slow down. How many joules are produced? There is definitely more than one building block, which disqualifies it. Fruit salad42. Chemical a. element b. mixture c. homogeneous mixture d. heterogeneous mixture, Explain the differences between the following. . d) Be, Which of the following is a nonmetal? 4. Why? Is potting soil a homogeneous mixture or a heterogeneous mixture? 7. tin Group 8A (18) Choose the homogeneous mixture from the list below. - 80. cal (334 J) of heat is needed to melt exactly 1 g of ice at its melting point (0 C). What is difference between homogeneous and heterogeneous mixture? Chocolate chip cookies are a heterogeneous mixture. 5. What are some of the techniques by which mixtures can be resolved into their components? A=(11203010). I 7. has a grayish-white color Conversely, a heterogeneous mixture has components whose proportions vary throughout the sample. 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. Is cereal and milk a homogeneous mixture or a heterogeneous mixture? The difference between homogeneous and heterogeneous is whether not the composition and appearance of the substance is consistent throughout. a) F They are quite unreactive and are seldom found in combination with other elements. Classify each of the following as a pure substance (element or compound) or a mixture (homogeneous or heterogeneous): Gasoline burns in air. 2. joules to melt 17.0 g of ice 3. Kinetic - electrons that occupy a large, empty space around the 4. For example, "Hg" is the elemental symbol for the element named "mercury," which contains neither an "h" nor an "g" in its spelling! -the formation of bones and teeth. element compound heterogeneous mixture homogeneous mixture 2 See answers Advertisement Advertisement madison120200 madison120200 Heterogeneous mixture because you can see the things that make up the cookie Advertisement - good conductors of heat and electricity -25C to C -25 C, Solve the following temperature conversions: Chemical. A pure substance is generally a substance which is made up of one mind of building block. Explain. Chocolate chip ice cream is a heterogeneous mixture. sulfur is found in the nucleus Water on the street turns to ice during a cold wintry night. - Gain electrons during a chemical change, - They are better conductors of heat and electricity than the nonmetals, but not as good as the metals. Therefore salt water is a homogeneous mixture. 1. oxygen Physical Are sand and water a pure substance, a homogeneous mixture, or a heterogeneous mixture? a) all matter is made up of small pieces called atoms liquid The dough itself will not be uniform. Provide three examples of each. 1. - The metalloids are semiconductors because they can be modified to function as conductors or insulators. Mixtures can be separated by the differences in the physical properties of their components. If the composition of a material is not completely uniform, then it is heterogeneous (e.g., chocolate chip cookie dough, blue cheese, and dirt). The salt water described above is homogeneous because the dissolved salt is evenly distributed throughout the entire salt water sample. Is gasoline a homogeneous mixture or a heterogeneous mixture? . sulfur 16p, 16e, How many protons and electrons are there in a neutral atom of the following? Chemical to 150 C. A chocolate chip would be considered a homogeneous mixture, assuming that there werent swirls or other materials mixed into it. d. Homogeneous mixture. Chocolate pudding is made of cacao beans, sugar, oil, and and other additives, depending on the recipe. Explanation:Each of these coins is uniquely-sized and -shaped, making the mixture non-uniform. - Of two or more different elements combine to form chemical changes. 46 C. Chocolate chip cookies are a heterogeneous mixture. A hot tub reaches a temperature of 40.6 C. 3. contains the alkali metals Explain. There are two kinds of pure substances: elements and compounds. d) electrons orbit the nucleus Is a chocolate chip cookie an example of a heterogeneous or homogenous mixture? the horizontal line at the boiling point is longer than the horizontal line at the melting point. What are the examples of homogeneous? 1. copper Instead, wed likely call it a homogeneous mixture. He There will be uneven amounts of dough to chocolate. Is isopropyl alcohol a heterogeneous or homogeneous mixture? Ca c) density is mass/volume A) heterogeneous mixture B) compound C) homogenous mixture D) element. 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. Copper has the lowest specific heat of the samples and will reach the highest temperature. a car speeding down the freeway= kinetic energy What are the examples of homogeneous? d) Electrons are much lighter than neutrons, Which of the following elements is an alkaline earth metal? Heterogeneous Mixture: In a heterogeneous mixture, all particles are visible because the mixture. 1. 65.3F=C Usually a chocolate chip is a simple piece of pure chocolate, meant for eating or mixing into another recipe. 2. 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. . Explain. - a nucleus, located in the center of the atom, that 2. 8. strontium, 1. 3. Pure Substance 2. Explain why a suspension is considered a heterogeneous mixture? stream
Is carbon dioxide classified as an element, a compound, a homogeneous mixture, or a heterogeneous mixture? Give three examples of homogeneous and heterogeneous mixtures, respectively. On the Celsius scale, her temperature would be 37.7 C, a mild fever. Answer a: Compound A proton and an electron have opposite charges. Check out our science hub page for our latest articles answering your questions. The n=2 energy level consists of one 2s and three 2p orbitals. 4. tea with ice and lemon slices, 1. While it wouldnt be easy to separate the ingredients in chocolate, it could be done without a chemical reaction. 4. Concrete is a heterogeneous mixture of an aggregate: cement, and water. 4d sublevel. - However, the mass number does not appear on the periodic table because it applies to single atoms only. A chocolate-chip cookie does not have a uniform composition, which makes it a heterogeneous mixture. - Density: 2.1g/mL 2. n=2 Se 34p, 45n, 34e . Chemical Mixture -particles that are far apart. 4. A chocolate chip cookie is a heterogeneous mixture, because it contains many different chemicals that form the cookie dough and the chocolate chips, which can be separated by pulling out the chips. 4. Note that chemical names consist of words that resemble elemental names, and chemical formulas contain elemental symbols. is resistant to corrosion = chemical Ahomogeneous mixturehas a uniform composition, meaning that if several samples are taken, each would contain the same chemicals in approximately the same ratio. Examples of heterogeneous mixtures include sand, oil and water, and chicken noodle soup. "Dihydrogen monoxide" is the chemical name for the compound commonly known as "water." -25C to C, the energy in your food = potential energy Essential to Health: -20 are essential for the well-being and survival of the 3500 cal to kcal 5. iron c. bronze. Is vitamin D classified as an element, a compound, a homogeneous mixture, or a heterogeneous mixture? Think about all the sugar, oil, milk, and cocoa (which comes from the cacao bean) that are need to make chocolate. -regulation of cellular metabolism. Classify each of the following as a pure substance (element or compound) or a mixture (homogeneous or heterogeneous): Cobalt, Write the name for the symbol of each of the following elements found in the body: (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. Homogeneous and Heterogeneous Mixtures The physical combination of two or more components is called a mixture. Explain the difference between a heterogeneous mixture, a homogeneous mixture, a compound, and an element. Tamang sagot sa tanong: Write the word Homogeneous if the sample belongs to homogeneous and the word Heterogeneous if it is belongs to heterogenous. 1380 J, 330. cal a) the number of electrons The type of mixture chocolate is depends on the chocolate. Explain. Explain. (a) Fine sand and coarse gravel (b) Vegetable oil, Styrofoam, and wat. at the top of a ski hill about to come down = potential energy, Indicate whether each item describes potential or kinetic energy: Heterogeneous mixture. 4. 2. 7. 4. 6. barium Whole-number subscripts indicate how many of the previouselement are present in the compound. Explain. 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. 99.2 cal copyright 2003-2023 Homework.Study.com. Often it is easy to confuse a homogeneous mixture with a pure substance because they are both uniform. compounds. tin =Sn Is fruit salad classified as an element, a compound, a homogeneous mixture, or a heterogeneous mixture? Chemistry Link to Health: Elements Is cake batter classified as a pure substance (element or compound) or a mixture? 4. kilojoules to heat 175 g of copper from 28 C to 188 C, 1. }bni~ET]NNl^5r}Go^3{e&G%`ir_v/oFI::F5+=cvXLT04uj0:>tnGB $Vr"1cc:j{IZKG*T,587FHG1!7jpLrc=.GK#lq3>Q0r+V%KBC#o@%PlYG8>b;W, |V2!54Fgq9Vq:Wo{W g92s~^_$kKR_P!!