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Questions in chemistry

[Done] 1. What is the empirical formula for a compound containing 63.8% N and 36.2% O? A. N₂O₅ B. N₂O₃ C. NO₂ D. NO E. N₂O

[Done] What is produced when iron-bearing silicate minerals in the desert landscape oxidize?

[Done] Describe all lab equipment that can be used to accurately measure the volume of a liquid.

[Done] Why do chloride ions move to the positive electrode?

[Done] Boron found in nature has an atomic weight of 10.811 and is made up of the isotopes [tex]^{10}B[/tex] (mass 10.013 amu) and [tex]^{11}B[/tex] (mass 11.0093 amu). What percentage of naturally occurring boron is made up of [tex]^{10}B[/tex] and [tex]^{11}B[/tex] respectively? a. 30:70 b. 25:75 c. 20:80 d. 15:85

[Done] Ethene is the first member of the: A. Alkane series B. Alkyne series C. Saturated hydrocarbons D. Unsaturated hydrocarbons E. Aromatic hydrocarbons

[Done] Which of the following is the minimum energy required for a nonspontaneous reaction? A. Free energy B. Lattice energy C. Kinetic energy D. Activation energy E. Ionization energy

[Done] Which is defined as moles of solute per liter of solution? A. Molarity B. Formality C. Density D. Molality E. Normality

[Done] True or false: Inside a nuclear power plant, nuclear fission takes place within the heat exchanger.

[Done] How are elements identified in terms of their atoms?