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Calculate the pressure of 2520 moles of hydrogen gas stored at 27.0oC in the 180. L storage tank of modern hydrogen-powered car.

What are the bond angles around a central atom with sp hybridized orbitals?

Calculate the molar mass of a gas if 0.728 g of this gas occupies 0.250 L at 0.955 atm and 297 K. Show all your work for full credit. Use the correct number of significant figures.

Determine whether the following reaction is a redox reaction. If it is, identify the element that is oxidized, the element that is reduced, the oxidizing agent, and the reducing agent. Mg(s) + 2HCl(aq) → MgCl2 (aq) + H2(g)

Determine whether the following reaction is a redox reaction. If it is, identify the element that is oxidized, the element that is reduced, the oxidizing agent, and the reducing agent. C8H18(g) + 25O2(g) → 16CO2(g) + 18H2O(l)

Given the following Lewis structures for cyanate ion: 1. What is the formal charge of each atom in structure A? a) Formal charge of O [a] b) Formal charge of C [b] c) Formal charge of N [c] 2. What is the formal charge of each atom in structure B? a) Formal charge of O [d] b) Formal charge of C [e] c) Formal charge of N [f] 3. What is the formal charge of each atom in structure C? a) Formal charge of O [g] b) Formal charge of C [h] c) Formal charge of N [i] 4. Based on the formal charges determine which Lewis structure (A. B, or C) is more favorable? [j]

Determine whether the following reaction is a redox reaction. If it is, identify the element that is oxidized, the element that is reduced, the oxidizing agent, and the reducing agent. 3Ca(s) + 2N2(g) → Ca3N2(s)

Draw the Lewis structure of PF3 on a scrap sheet of paper, apply VSEPR theory and answer the following questions: a) Total number of valence electrons. [a] valence electrons b) Number of lone pairs on central atom. [b] lone pair(s) c) Molecular Geometry. [c] shape d) Polar or Nonpolar. [d] molecule d) Hybridization of the central atom. [e] 

For each of the following compounds specify if they are covalent or ionic: a) Al2O3 [1] b) HClO3 [2] c) NaOH [3] d) N2O5 [4]

For ClF3, the electron geometry is _____________ and the molecular geometry is __________.