Nitrous oxide, N,0, has a mass ratio of nitrogen to oxygen of 1.00:0.57. Determine the ratio by mass of nitrogen to oxygen in dinitrogen trioxide, N,O3, and dinitrogen pentoxide, N,O5. N,0, has a mass ratio of nitrogen to oxygen of 1.00: N,0, has a mass ratio of nitrogen to oxygen of 1.00:

Nitrous oxide, N,0, has a mass ratio of nitrogen to oxygen of 1.00:0.57. Determine the ratio by mass of nitrogen to oxygen in dinitrogen trioxide, N,O3, and dinitrogen pentoxide, N,O5. N,0, has a mass ratio of nitrogen to oxygen of 1.00: N,0, has a mass ratio of nitrogen to oxygen of 1.00:

Chemistry In Focus

7th Edition

ISBN:9781337399692

Author:Tro, Nivaldo J.

Publisher:Tro, Nivaldo J.

Chapter1: Molecular Reasons

Section: Chapter Questions

Problem 1.4YT: Constant Composition of Compounds Two samples of sugar are decomposed into their constituent...

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Several samples of methane gas, the primary component of natural gas, are decomposed into carbon and hydrogen. The masses of the carbon and hydrogen are then weighed, and the results are tabulated as shown here. Which of these does not follow the law of constant composition? a. 4.0 grams hydrogen and 12.0 grams carbon b. 1.5 grams hydrogen and 4.5 grams carbon c. 7.0 grams hydrogen and 17.0 grams carbon d. 10 grams hydrogen and 30 grams carbon
Classify the following as compounds or elements: a silver bromide used in photography; b calcium carbonate limestone; c sodium hydroxide lye; d uranium; e tin; f titanium.
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Copper: (a) Suppose you have a cube of copper metal that is 0.236 cm on a side with a mass of 0.1206 g. If you know that each copper atom (radius = 128 pm) has a mass of 1.055 1022 g (you will learn in Chapter 2 how to find the mass of one atom), how many atoms are there in this cube? What fraction of the cube is filled with atoms? (Or conversely, how much of the lattice is empty space?) Why is there empty space in the lattice? (b) Now look at the smallest, repeating unit of the crystal lattice of copper. Knowing that an edge of this cube is 361.47 pm and the density of copper is 8.960 g/cm3, calculate the number of copper atoms in this smallest, repeating unit.
The chemist in Example 1.14 did some further experiments. She found that the pipet used to measure the volume of the liquid is accurate to 0.03 cm3. The mass measurement is accurate to 0.002 g. Are these measurements sufficiently precise for the chemist to distinguish between isopropyl alcohol and ethanol?
Which of the these statements are qualitative? Which are quantitative? Explain your choice in each case. (a) The atomic mass of carbon is 12.011 (12.011 atomic mass units). (b) Pure aluminum is a silvery-white metal that is nonmagnetic, has a low density, and does not produce sparks when struck. (c) Sodium has a density of 0.968 g/mL. (d) In animals the sodium cation, Na+, is the main extracellular cation and is important for nerve function.
Constant Composition of Compounds Two samples of sugar are decomposed into their constituent elements. One sample of sugar produces 18.0 g carbon, 3.0 g hydrogen, and 24.0 g oxygen; the other sample produces 24.0 g carbon, 4.0 g hydrogen, and 32.0 g oxygen. Find the ratio of carbon to hydrogen and the ratio of oxygen to hydrogen for each of the samples, and show they are consistent with the law of constant composition.
2.95 Engineers who design bicycle frames are familiar with the densities of aluminium (2.699 g/cm3), steel (7.87 g/cm3), and titanium (4.507 g/cm3). How does this information compare with Figure 2.12, and what would it suggest for changes in this figure if more shades were used for the density colour-coding? (Iron is the principal component of steel)
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