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Home Question Bank Chemistry Archive 2024 December 02

Chemistry Questions from Dec 02,2024

Browse the Chemistry Q&A Archive for Dec 02,2024, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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What mass of KBr is contained in 2.50 moles of the compound? (Show your work.) As a candle burns, its mass decreases. However, mass is conserved in this reaction. Explain this observation. Paper burns by combining with oxygen. Why doesn't paper burn every time it contacts oxygen? Which of the following is a single replacement? \( \mathrm{KOH}+\mathrm{HCl} \rightarrow \mathrm{KCl}+\mathrm{H}_{2} \mathrm{O} \) \( 2 \mathrm{Na}+2 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{H}_{2}+2 \mathrm{NaOH} \) \( 2 \mathrm{C}_{2} \mathrm{H}_{6}+7 \mathrm{O}_{2} \rightarrow 4 \mathrm{CO}_{2}+6 \mathrm{H}_{2} \mathrm{O} \) \( \mathrm{H}_{2} \mathrm{O}+\mathrm{CO}_{2} \rightarrow \mathrm{H}_{2} \mathrm{CO}_{3} \) What particle is transferred from one atom to another in a redox reaction? electron proton neutron nucleus In what type of reaction does one reactant form two or more products? synthesis single replacement decomposition double replacement The mass of a hydrogen atom is 1.0 amu, and the mass of carbon atom is 12.0 amu. What is the molar mass of methane, \( \mathrm{CH}_{4} \) ? 13.0 amu 16.0 amu 13.0 g 16.0 g Which of the following is a statement of the law of conservation of mass? Mass is created but not destroyed. Mass is destroyed but not created. Mass is neither created nor destroyed. Mass is both created and destroyed, depending on the chemical reaction. In the following equation, what are the reactants? \( \mathrm{NaHCO}_{3}+\mathrm{HCl} \rightarrow \mathrm{NaCl}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CO}_{2} \) \( \mathrm{NaHCO}_{3} \) and HCl \( \mathrm{NaHCO}_{3} \) and NaCl HCl and NaCl \( \mathrm{NaCl}, \mathrm{H}_{2} \mathrm{O} \) and \( \mathrm{CO}_{2} \) Hidrogenación del propeno en presencia de platino
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