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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. 52.0 atoms Weegy: C. 1.80 x 1024 atoms User: How many grams of CO2 are in 2.1 mol of the compound? A. 21.0 g B. 44.0 g C. 66.0 g D. 92.4 g Weegy: 1 mole CO2 = 44.0096 grams CO2 (molar mass of CO2) Therefore, 2.1 mol CO2 x (44.0096 grams CO2/1 mole CO2) = 92.4 grams CO2 ... (More)
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Asked 7/2/2012 12:22:13 PM
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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 decomposition D. double-replacement and combustion
Weegy: C. double-replacement and decomposition User: For the chemical reaction C2H6 + 137 kJ ? C2H4 + H2, the chemical energy of the A. reactant is greater than the chemical energy of the products. B. products is greater than the chemical energy of the reactant. C. reactant and the chemical energy of the products are equal. D. reaction is conserved. Weegy: B. [ products is greater than the chemical energy of the reactant. moles = ... (More)
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Asked 7/2/2012 12:53:37 PM
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For the chemical reaction C2H6 + 137 kJ ? C2H4 + H2, the chemical energy of the A. reactant is greater than the chemical energy of the products. B. products is greater than the chemical energy of the reactant. C. reactant and the chemical energy of the products are equal. D. reaction is conserved.
Weegy: B rasing temp is equivalent to adding heat and by La Chat rnx shifts to right User: For the chemical reaction C2H6 + 137 kJ ? C2H4 + H2, the chemical energy of the A. reactant is greater than the chemical energy of the products. B. products is greater than the chemical energy of the reactant. C. reactant and the chemical energy of the products are equal. D. reaction is conserved. Weegy: D. reaction is conserved. (More)
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Asked 7/2/2012 1:26:21 PM
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