Lab_1__Chem_Density

Science Grade 5 Unit 4 2021 [23 Items] V Gordon, Terrell All Items 5. 6 P N> 4 8 9 10 11-20 Save Review Summary Exit Testing 5. A student tests an unknown substance that she believes to be a metal. Which of the following observations would indicate that the unknown substance is a metal? A.O It can break easily and is very brittle. B.O It can easily float in water. C. It is brown and dull. D. It is a good conductor of electricity. Time Remaining: 00:53:39 Copyright 2021 Illuminate Education, Inc. All Rights Reserved

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-23 An oxygen atom has a mass of 2.66 x 10 g and a glass of water has a mass of 0.050 kg. Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of oxygen atoms? Round your answer to 3 significant digits. How many moles of oxygen atoms have a mass equal to the mass of a glass of water? Round your answer to 2 significant digits. 0 x10 S

Cla Unit 1 Review Answer KEY- Goo X it 1 Quiz #4 Properties of MathX cl.castlelearning.com/Review/CLO/Student/Assignment/Questi Home - Hudl M East Rochest Quizlet Live Quizlet schools.org bookmarks Unit 1 Quiz #4 Pro 1 of 10 Question 1 Review Which statement describes a chemical property of hydrogen gas? 1. Hydrogen gas burns in air. 2. Hydrogen gas is colorless. 3. Hydrogen gas has a density of 0.000 09 g/cm at STP. 4. Hydrogen gas has a boiling point of 20. K at standard pre Standard

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-23 An oxygen atom has a mass of 2.66 × 10 g and a glass of water has a mass of 0.050 kg. Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of oxygen atoms? Round your answer to 3 significant digits. How many moles of oxygen atoms have a mass equal to the mass of a glass of water? Round your answer to 2 significant digits. g x10 X Ś

Use a model to explain how subatomic particles interact to cause ONE of the following periodic patterns. Use evidence and scientific reasoning to justify the validity of your model.

- 23 An oxygen atom has a mass of 2.66 × 10 g and a glass of water has a mass of 0.050 kg. Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of oxygen atoms? Round your answer to 3 significant digits. How many moles of oxygen atoms have a mass equal to the mass of a glass of water? Round your answer to 2 significant digits. 0 g x10 X

What you need is in the picture the chart is in there two but you might have to zoom in to see it Thank You

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The astronaut then measures the abundance of silicon on the new planet, obtaining the following results: Abundance Mass Isotope (%) (amu) 28 Si 73.71 27.98 29 Si 14.93 28.98 30 Si 11.36 29.97 What is the atomic mass of silicon for this planet? Express your answer to two decimal places, and include the appropriate units.

MEA Naming components of the scientific method In the table below you will find three descriptions of sclentists engaging in activities that are part of the sclentific method. What are the missing words? description missing word? 5 ? After studying the chemical reactions of many compounds made of carbon, August discovers a chemical bonds to other atoms when it forms a compound. that says carbon always forms 4 about the arrangement of elements in the Wolfgang develops a Periodic Table, based on some ideas about how electrons are arranged in the different atoms of different elements. Using equations he develops, he is able to predict the exact arrangement of electrons in many atoms, and from there predict why they are where they are in the Periodic Table. Antoine burns some charcoal, and a very small diamond (!), and makes that the only product of both reactions is a heavy gas the (carbon dioxide). Explanation Check 2021 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy C…

MEASUREMENT AND MATTER Organization of the Periodic Table Read each description in the first column of the table below. If any chemical element with atomic number of 92 or less matches the description, check Yes and enter the chemical symbol of an element that matches. Otherwise check No in the second column. description An element in Period 1 and Group 8A. A metalloid in Group 4A. An alkali metal with a lower atomic number than nitrogen. A main-group element in Period 6. Does any element with Z≤ 92 match the description? Yes Yes Yes Yes No No O No No If you checked yes, give the symbol of an element with Z ≤ 92 that matches. X 0/5 Ś Sabrina

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12. Four students were asked to complete a table for a science assignment. Each student selected one chemical element from each of four groups in the periodic table and then classified each element as a metal, a nonmetal, or a metalloid. Information About Which table was completed correctly? Some Chemical Elements Group Symbol Classification 10 Ni Nonmetal 14 Metalloid 2 Mg Metal 6 Pb Metal Information About Some Chemical Elements Group Symbol Classification 17 Nonmetal Ca Metal Rb Metal 15 As Metalloid Information About Some Chemical Elements Group Symbol Classification 13 B Metalloid 15 Metal 2 Ra Nonmetal 18 Не Metal Information About Some Chemical Elements Group Symbol Classification 11 Cu Metal 15 Sb Metal 16 Metalloid 2 Ne Nonmetal

This is not graded, it’s for practice. Answer all of the questions.

Magnesium reacts explosively with oxygen to form magnesium oxide. Which is NOT true of this reaction?A. The mass of magnesium oxide produced equals the mass of magnesium consumed plus the mass of oxygen consumed.B. The reaction describes the formation of a new substance.C. The product of the reaction, magnesium oxide, is a chemical compound.D. Magnesium oxide has physical and chemical properties similar to both oxygen and magnesium.