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The coefficients in a balanced chemical equation always can express the ratio of A. moles of reactants and products. B. volume of reactants and products. C. atoms of reactants and products. D. mass of reactants and products.
Weegy: A chemical equation shows the ratio of C. atoms of reactants and products. User: When magnesium carbonate, MgCO2, reacts with nitric acid, HNO3, it forms magnesium nitrate, Mg(NO3)2, and carbonic acid, H2CO3. Carbonic acid then breaks down into water and carbon dioxide. Which two types of reactions take place in this process? A. synthesis and decomposition B. single-replacement and combustion C. double-replacement and ... (More)
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Asked 7/21/2012 12:02:12 PM
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Which of the following does NOT show the law of conservation of mass? A. 24 g of Mg burn in 32 g O2 to produce 56 g of MgO. B. 24 mL of Mg burn in 32 mL O2 to produce 56 mL of MgO. C. 2 atoms of Mg react with 1 molecule of O2 to produce 2 units of MgO. D. 1 atom of Mg reacts with 1 atom of O to produce a unit of MgO that contains 2 atoms. User: Which of the following is a balanced chemical equation for the synthesis of NaBr from Na and Br2? A. Na + Br2 ? NaBr B. 2Na + Br2 ? ...
Weegy: D. 2Na + Br2 - - > 2NaBr User: Methane, CH4, burns in oxygen gas to form water and carbon dioxide. What is the correct balanced chemical equation for this reaction? A. CH4 + O ? H2O + CO2 B. CH4 + 4O ? 2H2O + CO2 C. CH4 + O2 ? H2O + CO2 D. CH4 + 2O2 ? 2H2O + CO2 Weegy: D. CH4 + 2O2 ? 2H2O + CO2 User: How many atoms are present in 3 moles of chromium? A. 6.02 x 1023 atoms B. 1.80 x 1023 atoms C. 1.80 x 1024 atoms D. ... (More)
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Asked 7/21/2012 11:56:02 AM
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