Relerences) Choose examples of an element, a compound, a heterogeneous mixture, and a homogeneous mixture. (Select all that apply.) a. Element: O carbon monoxide O sulfur O aluminum chloride O mercury O bismuth O methane b. Compound: carbon monoxide O sulfur O aluminum chloride O mercury O bismuth O methane c. Heterogeneous mixture: O mixture of potassium dichromate and iron filings O mixture of water and sulfuric acid

Write the name of the following elements, ions, or compounds: (please answer all questions in order) a.) the element that has 16 protons b.)  the ion with a -1 charge that has 18 electrons c.) the compound made from the alkali metal in the third period and the element with the atomic mass of 30.97 amu d.) the polyatomic ion that contains one sulfur and three oxygens e.) the compound made from the non-metal in group 1A and the polyatomic ion containing one nitrogen and three oxygens. f.)  the element in which 0.274 moles weighs 24.01 g.

QUESTION 31 A substance composed of two or more elements in a fixed, definite proportion is O A. a homogeneous mixture B. a heterogeneous mixture O C. a compound O D. a solution QUESTION 32 Bonds are made by sharing or transferring by the atoms. O A. protons O B. electrons OC. neutrons O D. photons QUESTION 33 Potassium (K) is a/an O A. noble gas OB. transition metal O C. alkali metal O D. alkaline earth metal

The element argon has three isotopes and an average atomic mass of 39.948 u. Idenitfy the most abundant isotope of element argon. argon-38 cannot determine from the information given argon-36 argon-40 3:39 PM ch S.W 2020 79°F 9/8/2021 AV 10 DII delete f9 12 144 & L. backspace home 4. 8 pg up T. Y 心) %24 林

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Where applicable, answers accurate to 3 or 4 significant figures unless otherwise specified. 3. Tungsten has 4 major isotopes. Given the atomic weight of tungsten, 183.85, complete the following table. You must show your work, avoid rounding off intermediate values, and report your % abundance values accurate to 2 decimal places. Isotope Tungsten-182 Tungsten-183 Tungsten-184 Tungsten-186 % Abundance Exact Mass 181.9482 182.9502 26.50 14.31 183.9509 185.9544

Based on the following word descriptions, write the formula for each of the indicated substances.a. a compound whose molecules contain twice as many oxygen atomsas carbon atomsb. a compound whose molecules contain an equal number of carbon and oxygen atomsc. a compound in which there is an equal number of calcium and carbon atoms, but there are three times as many atoms of oxygen as of the other Iwo elementsd. a compound whose molecules contain twice as many hydrogen atoms as sulfur atoms and four times as many oxygen atoms as sulfur atomse. a compound in which there are twice as many chlorine atoms as barium atomsf. a compound in which there are three sulfur atoms for every twoaluminum atoms

31. Which of the following parts of Dalton's theory were proven incorrect with newer versions of the atomic theory?    Group of answer choices a)  An element is made of atoms that are all the same size and mass. b)  Atoms combine to form chemical compounds c)  Chemical Comoundds are formed in whole number ratios. d)  The same elements may be combined in different ratios to form different compounds.