The mineral hausmannite, Mn3O4, which contains both manganese(II) and manganese(III) ions, is formed from heating manganese(IV) oxide to 890°C. 3 MnO2(l) → Mn3O4(s) + O2(g) (at 890°C) (a) What is the maximum mass, in megagrams, of Mn3O4 that can be formed from the decomposition of 36.02 Mg of manganese(IV) oxide, MnO2?

If sodium peroxide is added to water, elemental oxygen gas is generated, consider this unbalanced equation: Naz O2 (s) + H2 O(1) → NAOH(aq) + 02(9) Suppose 5.80 g of sodium peroxide is added to a large excess of water. What mass of oxygen gas will be produced? Mass =

Balance the chemical equation below using the smallest possible whole number stoichiometric coefficients. Ca, (PO,), (s) + SiO, (s) + C(s) → CaSio, (s) + P, (s) + CO(g) 2 alo Ar

A fictitious metal called Oscium (MM = 72.4 g· mol) reacts with nitrogen gas according to the following reaction: 6 Oc (s) + N2(g) + 2 OC3N(s)

Which of the following reactions does the chemical equation below best represent? 3 Cu(CI), (aq) + 2 Al (s) → 3 Cu (s) + 2 AICI, (aq) formation of copper(ll) oxide upon heating a solution containing copper(Il) hydroxide O reaction of copper (II) oxide with hydrochloric acid O reaction of copper(l) nitrate with sodium hydroxide O reaction of copper(ll) chloride with elemental aluminum

In a lab, a grade 11 chemistry student used 0.0123 mol of solid magnesium metal. The student proceeds to burn the magnesium metal in a Bunsen burned with an excess amount of oxygen gas to produce 0.41g of magnesium oxide based on the following balanced equation: 2Mg(s) + 02(g) —> 2MgO(s). The theoretical amount of magnesium oxide should be what?

There are two steps in the extraction of copper metal from chalcocite, a copper ore. In the first step, copper(I) sulfide and oxygen react to form copper(I) oxide and sulfur dioxide: 2 Cu₂ S(s) + 3 0₂(g) →2 Cu₂O(s) +2 SO₂ (g) In the second step, copper(I)oxide and carbon react to form copper and carbon monoxide: Cu₂O(s) + C(s)→2 Cu(s)+CO(g) Write the net chemical equation for the production of copper from copper(I) sulfide, oxygen and carbon. Be sure your equation is balanced. ローロ 06

Aqueous solutions of ammonia 1NH32 and bleach (active ingredient NaOCl) are sold as cleaning fluids, but bottles of both of them warn: “Never mix ammonia and bleach, as toxic gases may be produced.” One of the toxic gases that can be produced is chloroamine, NH2Cl.Another toxic gas that can be produced is nitrogen trichloride, NCl3. What is the oxidation number of N in nitrogen trichloride?

1.58g of magnesium hydrogencarbonate was added to a 1.68 mol/L solution of acetic acid, CH3COOH in water (50.0 mL), producing carbon dioxide gas, water and magnesium acetate, Mg(CH3COO)2. a) Write a balanced chemical equation for the reaction.  b) What mass of acetic acid is in the aqueous solution?  c) Which of the reactants is the limiting reagent? Justify your answer.  d) If 1.23 g of magnesium acetate was produced, what is the percentage yield of the reaction? e) What is the theoretical yield (in grams) of carbon dioxide from this reaction?  f) The above reaction is performed in a closed 25 L container at 10 °C. Upon completion of the reaction, what will the final pressure of CO2 be inside the container?      please answer d, e and f

Balance the following chemical equations (include the states of matter): The reaction between elemental phosphorus P4(s) and O2(g) to make P4O10(s):