Balance the following reaction and then answer the questions. _____P4O10 + _____H2O → ____H3PO4 + 424kJ Classify the reaction as endothermic or exothermic. What is the heat change when 45.7 grams of P4O10 dissolves in excess water? What is the heat change when 137 grams of P4O10 dissolves in excess water?

Your lab partner accidentally mixed some sodium chloride with your sample of Epsom salts (MgSO₄･7H₂O). You want to make a standard solution of magnesium ion, and this is the only sample of a magnesium salt you have. To determine the amount of magnesium salt in the mixture, you heat 100.00 g to drive off the water of hydration and find that the anhydrous mixture has a mass of 57.75 g. How many grams of the original salt mixture must you add to 1.000 L of water to make a 0.100 M solution of Mg²⁺ ion?

Consider the following particulate-level representation of a reaction How is the reaction classified? O combination O double-replacement O single-replacement O combustion O decomposition

2)_C;H3 +_02→__H;0 + __CO2 45.00g of oxygen will produce how many grams of carbon dioxide?

Indicate whether or not each of the following chemical reactions represents a combustion reaction. a) 2CuS + 3O2 ⟶⟶ 2CuO + 2SO2                                   b) 2Mg + O2 ⟶⟶ 2MgO

Use the chemical equation and table to answer the following question.   Which mass of water is expected to be produced in the reaction?   Question 4 options:   18.0 g because the mass of the products must equal the mass of the reactants.   76.5 g because the mass of the products must equal the mass of the reactants.   18.0 g because mass is created to form the products.   76.5 g because mass cannot be created or destroyed.

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Match the following. Match the words in the left column to the appropriate blanks on the right. Make certain each blank is complete before submitting your answer. combustion oxidation-reduction precipitation acid-base gas evolution N 3. 4. 5. CH₂(g) +20₂(g) → CO₂(g) + 2H₂O(g) Reset Help H₂SO4(aq) + 2LiOH(aq) → 2H₂O(l) + Li₂SO4(aq) : Mg(s) + Cu(NO3)2(aq) → Mg(NO3)2(aq) + Cu(s) : 2HCl(aq) + (NH4)₂S(aq) → H₂S(g) + 2NH4Cl(aq) : NaCl(aq) + AgNO3(aq) → AgCl(s) + NaNO3(aq)

Balance the following unbalanced chemical equation showing the combustion of methane. _______ CH4 + ________ O2 --> _________ CO2 + _________ H2O

Write the word equation below and determine the type of reaction (synthesis/combination,decomposition,single-displacement,double-displacement or combustion. 2H20=2H2+02