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Questions in chemistry

📝 Answered - Which sample of nitrogen gas at STP occupies the largest volume? A. 14 liters B. 14 moles C. 14 grams D. \(1.4 \times 10^{24}\) molecules E. \(4.2 \times 10^{24}\) molecules

📝 Answered - Given: [tex] Z = 0.43Y + 12 [/tex] What is [tex] Y [/tex] when [tex] Z = 28 [/tex]?

📝 Answered - Isaac read that 32% of people owned dogs. What fraction of people owned dogs?

📝 Answered - Which element, in the ground state, has only 1 electron in a p orbital? A. Carbon B. Fluorine C. Hydrogen D. Nitrogen E. Aluminum

📝 Answered - Which of the following has the most electrons? A) [tex]\text{Sr}^{2+}[/tex] B) [tex]\text{Rb}[/tex] C) [tex]\text{Cl}^{-}[/tex] D) [tex]\text{Kr}[/tex]

📝 Answered - What volume does 8.5 g of NH₃ occupy at STP? A. 2.81 L B. 5.61 L C. 11.21 L D. 22.41 L E. 44.81 L

📝 Answered - Every substance is either an element or a ____. Fill in the blank.

📝 Answered - Why is the equation incorrect? \[ \text{Mg}_3 + \text{N}_2 \rightarrow \text{Mg}_3\text{N}_2 \] A. Some of the subscripts are incorrectly used. B. The equation is not balanced. C. The valence of the nitride ion is incorrect. D. The valence of the magnesium ion is incorrect. E. The coefficient of \(\text{N}_2\) is incorrect.

📝 Answered - What is the main intermolecular force in H\(_2\)CO? A. Dipole-dipole B. Hydrogen bond C. London dispersion D. Polar/nonpolar

📝 Answered - Consider the following equation: \[ 4\text{NH}_4 + 5\text{O}_2 \rightarrow 4\text{NO} + 6\text{H}_2\text{O} \] How many moles of water are produced when 2 moles of \(\text{NH}_4\) react with excess oxygen gas?