Chapter 2: Problem 109
The elements in one of the groups in the periodic table are often called the coinage metals. Identify the elements in this group based on your own experience.
Chapter 2: Problem 109
The elements in one of the groups in the periodic table are often called the coinage metals. Identify the elements in this group based on your own experience.
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Get started for freeHydrazine, ammonia, and hydrogen azide all contain only nitrogen and hydrogen. The mass of hydrogen that combines with \(1.00 \mathrm{~g}\) of nitrogen for each compound is \(1.44 \times 10^{-1} \mathrm{~g}\). \(2.16 \times 10^{-1} \mathrm{~g}\), and \(2.40 \times 10^{-2} \mathrm{~g}\), respectively. Show how these data illustrate the law of multiple proportions.
A sample of chloroform is found to contain \(12.0 \mathrm{~g}\) of carbon, \(106.4 \mathrm{~g}\) of chlorine, and \(1.01 \mathrm{~g}\) of hydrogen. If a second sample of chloroform is found to contain \(30.0 \mathrm{~g}\) of carbon, what is the total mass of chloroform in the second sample?
How many protons and neutrons are in the nucleus of each of the following atoms? In a neutral atom of each element, how many electrons are present? a. \({ }^{79} \mathrm{Br}\) b. \(^{81} \mathrm{Br}\) c. \({ }^{239} \mathrm{Pu}\) d. \({ }^{133} \mathrm{Cs}\) e. \({ }^{3} \mathrm{H}\) f. \({ }^{56} \mathrm{Fe}\)
Observations of the reaction between nitrogen gas and hydrogen gas show us that 1 volume of nitrogen reacts with 3 volumes of hydrogen to make 2 volumes of gaseous product, as shown helow: Determine the formula of the product and justify your answer.
In a reaction, \(34.0 \mathrm{~g}\) of chromium(III) oxide reacts with \(12.1 \mathrm{~g}\) of aluminum to produce chromium and aluminum oxide. If \(23.3 \mathrm{~g}\) of chromium is produced, what mass of aluminum \(\mathrm{ox}\) ide is produced?
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