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Solve the equation. y + (–6) = –9 A. –15 B. –3 C. 54 D. 3
Weegy: B. -3 (More)
Question
Updated 116 days ago|7/29/2014 10:02:44 PM
1 Answer/Comment
y + (-6) = -9

y - 6 = -9;

y = -9 + 6;

y = -3
Added 116 days ago|7/29/2014 9:54:34 PM
This answer has been confirmed as correct, not copied, and helpful.
Confirmed by jeifunk [7/29/2014 10:02:34 PM]
Which statement is NOT true? A. 3.6 kg = 3,600 g B. 300 mL 50 mg D. 3.7 cm > 45 mm
Weegy: There are three significant figures in the measurement 50,600 mg. They are 5, 6 and one 0. (More)
Question
Expert Answered
Asked 8/20/2012 9:35:21 AM
0 Answers/Comments
Which statement is NOT true? A. 3.6 kg = 3,600 g B. 300 mL 50 mg D. 3.7 cm > 45 mm
Weegy: 3.7 cm = 37 mm So D is incorrect (More)
Question
Expert Answered
Asked 8/20/2012 9:34:03 AM
0 Answers/Comments
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 + ...
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. 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 - > D 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 - > D User: An industrial process makes calcium oxide by decomposing calcium carbonate. Which of the following is NOT needed to calculate the mass of calcium oxide that can be produced from 4.7 kg of calcium carbonate? A. the balanced chemical equation B. molar masses of the reactants C. molar masses of the product D. the volume of the unknown mass Weegy: A. the balanced chemical equation User: 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. (More)
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Expert Answered
Asked 8/20/2012 9:08:45 AM
0 Answers/Comments
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