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Chapter 2: Problem 77

Give the name or chemical formula, as appropriate, for each of the following binary molecular substances: (a) $\mathrm{SF}_{6},(\mathbf{b}) \mathrm{IF}_{5},\( (c) \)\mathrm{XeO}_{3}$, (d) dinitrogen tetroxide, (e) hydrogen cyanide, (f) tetraphosphorus hexasulfide.

Short Answer

Expert verified
(a) Sulfur hexafluoride, (b) Iodine pentafluoride, (c) Xenon trioxide, (d) \(N_2O_4\), (e) HCN, (f) \(P_4S_6\).

Step by step solution

01

(a) Naming SF6

Sulfur hexafluoride First, identify the elements involved in the compound: sulfur (S) and fluorine (F). Next, determine the number of each element present in the formula. In this case, there are one sulfur atom and six fluorine atoms. Use numerical prefixes to indicate the number of atoms for each element (except for the first element, if there's only one atom), and then combine the names of the two elements: sulfur hexafluoride.
02

(b) Naming IF5

Iodine pentafluoride First, identify the elements involved in the compound: iodine (I) and fluorine (F). Next, determine the number of each element present in the formula. In this case, there are one iodine atom and five fluorine atoms. Use numerical prefixes to indicate the number of atoms for each element (except for the first element, if there's only one atom), and then combine the names of the two elements: iodine pentafluoride.
03

(c) Naming XeO3

Xenon trioxide First, identify the elements involved in the compound: xenon (Xe) and oxygen (O). Next, determine the number of each element present in the formula. In this case, there are one xenon atom and three oxygen atoms. Use numerical prefixes to indicate the number of atoms for each element (except for the first element, if there's only one atom), and then combine the names of the two elements: xenon trioxide.
04

(d) Finding the formula for dinitrogen tetroxide

Formula: N2O4 First, identify the elements involved in the name: nitrogen (N) and oxygen (O). Next, determine the numerical prefixes used for each element. In this case, "di" means two and "tetra" means four. Apply the numerical prefixes to the corresponding elements to obtain the chemical formula: N2O4.
05

(e) Finding the formula for hydrogen cyanide

Formula: HCN First, identify the elements involved in the name: hydrogen (H) and cyanide (CN). There is no numerical prefix, which means that there is one hydrogen atom and one cyanide ion. The chemical formula for hydrogen cyanide is HCN.
06

(f) Finding the formula for tetraphosphorus hexasulfide

Formula: P4S6 First, identify the elements involved in the name: phosphorus (P) and sulfur (S). Next, determine the numerical prefixes used for each element. In this case, "tetra" means four and "hexa" means six. Apply the numerical prefixes to the corresponding elements to obtain the chemical formula: P4S6.

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Most popular questions from this chapter

Mass spectrometry is more often applied to molecules than to atoms. We will see in Chapter 3 that the molecular weight of a molecule is the sum of the atomic weights of the atoms in the molecule. The mass spectrum of \(\mathrm{H}_{2}\) is taken under conditions that prevent decomposition into \(\mathrm{H}\) atoms. The two naturally occurring isotopes of hydrogen are ${ }^{1} \mathrm{H}\( (atomic mass \)=1.00783 \mathrm{u}\(; abundance \)\left.99.9885 \%\right)\( and \){ }^{2} \mathrm{H}\( (atomic mass \)=2.01410 \mathrm{u}$; abundance \(\left.0.0115 \%\right)\). (a) How many peaks will the mass spectrum have? (b) Give the relative atomic masses of each of these peaks. (c) Which peak will be the largest, and which the smallest?

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