27. Aluminum reacts with oxygen gas to form aluminum oxide, as shown in the reaction below. 4Al(s) + 302(g) → 2Al2O3(s) elillus beol A billua beel How many grams of aluminum are needed to completely react with 192 g of oxygen gas? DEST A. 27 g B. 102 g C. 216 g Snoilsupe privo hoitosen to say it D. 432 g

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You are asked to make 43.0 grams of iron (Fe) from iron III oxide (Fe-Os) and carbon monoxide (CO) as shown in the chemical equation below. Fe₂O3 + 3C0 →→ 2Fe + 3C0₂2 How many grams of iron (III) oxide must you use? 0 A 61.5 g B. 122 g C. 0.777 g D. 686 g

You have 17.9 g of CaCl2. How many grams of Na3PO4 are needed for the reaction to go to completion? Balanced Equation: 3 CaCl2 (aq) + 2 Na3PO4 (aq) ⟶ 6 NaCl (aq) + Ca3(PO4)2 (s) Select one: a. 39.7 g b. 17.628 g c. 8.08 g d. 39.66 g e. 17.6 g

A MOving tổ another question WIII Save Question 3 Cobalt reacts with excess oxygen gas to form colbalt(III) oxide. Choose the correct representation of this reaction. A. Co + 02 → Co203 B. 4 Co + 3 02 → 2 Co2O3 C. 2 Co + O2 → 2 CoO D.3 Co + O2 → Co3O2 A A Moving to another question will save this response. 0,432 11 éty P MacBook Pro $ * 3 4. 5 7 8 CO

106. A chemist carries out this reaction, beginning with 2.10 grams of NaBr and 3.25 grams of Pb(NO3),: 2 NaBr (aq) + Pb(NO3)2 (aq) > PbBr, (s) + 2 NaNO, (aq) a. Which starting material is the limiting reagent? b. What is the theoretical yield of PbBr, in this reaction? c. If the chemist actually isolates 3.5 grams of PbBr,, what is the percent yield of the reaction?

Classify each chemical reaction: reaction 2CH₂ CH₂CO₂H (1) + 70₂(g) → 6CO₂(g) + 6H₂0(g) CH, (CH₂), CH₂ (8) + 80₂(g) → 5CO₂(g) + 6H₂0 (g) Na₂S (aq) + FeCl₂ (aq) → 2NaCl(aq) + FeS (s) Mg1₂ (aq) + Pb (NO₂)₂ (aqg) → Mg(NO3)₂ (aq) + PbI₂ (s) type of reaction (check all that apply) combination single replacement double replacement decomposition combination single replacement double replacement decomposition combination single replacement double replacement decomposition combination single replacement double replacement decomposition X precipitation combustion acid-base precipitation combustion acid-base precipitation combustion acid-base precipitation combustion acid-base

In each chemical reaction below, an atom or group of atoms is moving. It is bonded to something different in the reactants than it is in the products. A chemical reaction always involves a move like this. 18. A. B. C. D. 19. PAAUA ARCA D. 20. A. B. C. 9.1 0Z (258g) D. 4 H2 + CO2 → CH4 + 2 H₂O mie Which atoms is the C bonded to in the reactants? (C) Which atoms is the C bonded to in the products? en (H) Which atom is each O bonded to in the reactants? (0) Which atoms is each O bonded to in the products? (C) HCl + NaOH → NaCl + HOH Which atom is the Cl bonded to in the reactants? Which atom is the Cl bonded to in the products? Which atom is the OH group bonded to in the reactants? Which atom is the OH group bonded to in the products? will pieces to leave all CH4 + 2 O2 CO₂ + 2 H₂Oith the labi, please Which atom is the C bonded to in the reactants? Which atom is the C bonded to in the products? Which atom is the O bonded to in the reactants? Which atom is the O bonded to in the products?…

A2 5. The Reduction and Oxidation of Metals Hydrogen sulfide can be used in aqueous solutions to separate out metal ions. On the other hand, hydrogen sulfide in the air causes considerable damage to silver objects. When a silver goblet tarnished in the presence of hydrogen sulfide (and oxygen), 1.20 mol of silver sulfide formed. What amount of silver was consumed? A. 4.80 mol B. 2.40 mol C. 1.20 mol D. 0.600 mol

How many sodium ions are present in 20.0 mL of 0.10 M Na2S