How many grams of carbon are present in 67.9g of C3H8?C= 12H= 1 How many grams of carbon are present in 67.9g of C,Hg?Atomic weights:C= 12H= 155.6g25.5g22.6g18.5g* PreviousNext »

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Answered: How many grams of carbon are present in…

Introductory Chemistry For Today

8th Edition

ISBN:9781285644561

Author:Seager

Publisher:Seager

Chapter2: Atoms And Molecules

Section: Chapter Questions

Problem 2.34E

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An element X bas five major isotopes, which are listed below along with their abundances. What is the element? Isotope Percent Natural Abundance Mass (u) 46x 8.00% 45.95232 47x 7.30% 46.951764 48x 73.80% 47.947947 49x 5.50% 48.947841 50x 5.40% 49.944792
A 1.680-g sample of coal contains 1.584 g C. Calculate the mass percentage of C in the coal.
Atomic masses are relative masses. What does this mean?
Diamond is one form of elemental carbon. An engagement ring contains a diamond weighing 1.25 carats (1 carat = 200 mg). How many atoms are present in the diamond?
By x-ray diffraction it is possible to determine the geometric pattern in which atoms are arranged in a crystal and the distances between atoms. In a crystal of silver, four atoms effectively occupy the volume of a cube 0.409 nm on an edge. Taking the density of silver to be 10.5 g/cm3, calculate the number of atoms in one mole of silver.
Two basic laws of chemistry are the law of conservation of mass and the law of constant composition. Which of these laws (if any) do the following statements illustrate? (a) Lavoisier found that when mercury(ll) oxide, HgO, decomposes, the total mass of mercury (Hg) and oxygen formed equals the mass of mercury(ll) oxide decomposed. (b) Analysis of the calcium carbonate found in the marble mined in Carrara, Italy, and in the stalactites of the Carlsbad Caverns in New Mexico gives the same value for the percentage of calcium in calcium carbonate. (c) Hydrogen occurs as a mixture of two isotopes, one of which is twice as heavy as the other.
A sample of cocaine, C17H21O4N, is diluted with sugar, C12H22O11. When a 1.00-mg sample of this mixture is burned, 1.00 mL of carbon dioxide (d=1.80g/L) is formed. What is the percentage of cocaine in this mixture?
f an average sodium atom weighs 22.99 amu, how many sodium atoms are contained in 1.981013 amu of sodium? What will 3.011023 sodium atoms weigh?
Arrange the following substances in order of increasing mass percent of carbon. a. caffeine. C8H10N4O2 b. sucrose, C12H22O11 c. ethanol, C2H5OH
A 2.077-g sample of an element, which has an atomic mass between 40 and 55, reacts with oxygen to form 3.708 g of an oxide. Determine the formula of the oxide (and identify the element).

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How many grams of carbon are present in 67.9g of C3H3? Atomic weights: C = 12 H= 1 55.6g 25.5g 22.6g O 18.5g