Post-Assessment from 8.5D Chemical Formulas Save Question 3 Water is an example of a compound. Which of the following is the best description of all compounds? A substance that cannot be broken down into simpler substances A substance that is made up of more than one kind of atom A material that has a specific density at a specific temperature A group of atoms that have different abilities when joined together Previous Question Next Question

Post-Assessment from 8.5D Chemical Formulas Save Question 3 Water is an example of a compound. Which of the following is the best description of all compounds? A substance that cannot be broken down into simpler substances A substance that is made up of more than one kind of atom A material that has a specific density at a specific temperature A group of atoms that have different abilities when joined together Previous Question Next Question

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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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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Ular) react together to produce new The first step in writing balanced chemical reactions is identifying the substances in the reaction and labeling them as elements, molecular compounds or ionic compounds. Based on the type of substance it is, you then write the correct formula from the given name. Element: a single type of atom or a diatomic element. Recognized in the description as a single element name by itself. Elements are always neutral (they have no charge). Check if a diatomic element. Molecular compound: made of two nonmetal atoms. Greek prefixes in the name indicate the number of each type of atom in the formula. lonic compound: made of a cation and anion. Recognized because they start with a metal or ammonium. Need the charges of the ions to determine the formula of the neutral compound. For each chemical name below label it as an element (E), molecular (M), or ionic (I) and then write the correct formula for the substance on the line next to it. 1. Aluminum reacts with…
A chemist is working on a new kind of antacid the chemist mixed two powdery substances together in a sealed container nothing escaped witch of these diagrams shows the repeating grouping of atoms that make up the ending substances
1) Chemical formulas can be written as empirical formulas, molecular formulas, or structural formulas. Explain why these different forms of molecular expression are necessary. Chemical formula of a compound can be explained by the following forms - An Empirical formula gives the simplest, whole-number ratio of atoms in a compound. A Molecular formula uses chemical symbols and subscripts to indicate the exact numbers of different atoms in a molecule or compound. A Structural formula indicates the bonding arrangement of the atoms in the molecule. 1) Chemical formulas can be written as empirical formulas, molecular formulas, or structural formulas. Explain why these different forms of molecular expression are necessary. Chemical formula of a compound can be explained by the following forms - An Empirical formula gives the simplest, whole-number ratio of atoms in a compound. A Molecular formula uses chemical symbols and subscripts to indicate the exact numbers of different atoms in a…
A large number of atoms of the same kind is called an element a compound a mixture Depends on the number of atoms None of these
An analytical chemist measures the amount of Elements E₁ and E₂ in four samples of an unknown Substance. sample of E1 1 2 3 mass mass of E2 4 16.0 g 9.1 g 17.1 g 9.8 g 18.5 g 10.6 g 12.0 g 6.9 g It's known that X contains no elements other than E₁ and E₂. Using this information, answer the questions in the table below. Is X a pure substance or a mixture? If you don't have enough information to decide, choose can't decide. If you said X is a pure substance, calculate the mass of Element E₁ the analytical chemist would find in a new 10.0 g sample of X. Round your answer to 2 significant digits. O pure substance O mixture O (can't decide) g
All changes saved Determining whether the formation of an ionic compound is endothermic or exothermic reaction requires analyzing the individual steps that must occur for the reaction to take place. Which of the following steps is not necessary to combine barium and chlorine into the compound barium chloride? Ba) + Cl2 (8) → BaCl, The compound must be separated into ions. Ions combine to form compound. Barium must be ionized. Chlorine must be ionized. PREVIOUS 3 of 20 NEXT
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