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Questions in chemistry

📝 Answered - When the following equation is balanced: \[ \text{C}_4\text{H}_{10} + \text{O}_2 \rightarrow \text{CO}_2 + \text{H}_2\text{O} \] What is the coefficient of \(\text{CO}_2\)? a. 2 b. 4 c. 8 d. 10 e. 13

📝 Answered - How many electrons are in a carbon-13 ([tex]^{13}\text{C}[/tex]) atom?

📝 Answered - Which of the following changes will decrease the rate of collisions between gaseous molecules of type A and B in a closed container? A. decrease the volume of the container B. increase the temperature of the system C. add A molecules D. take away B molecules E. add an accelerating catalyst

📝 Answered - 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

📝 Answered - What is produced when iron-bearing silicate minerals in the desert landscape oxidize?

📝 Answered - Describe all lab equipment that can be used to accurately measure the volume of a liquid.

📝 Answered - Why do chloride ions move to the positive electrode?

📝 Answered - 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

📝 Answered - Ethene is the first member of the: A. Alkane series B. Alkyne series C. Saturated hydrocarbons D. Unsaturated hydrocarbons E. Aromatic hydrocarbons

📝 Answered - 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