Zinc reacts with aqueous sulfuric acid to form hydrogen gas according to the reaction below.  In an experiment, 0.225 L of wet H2 is collected over water at 26.9oC and a barometric pressure of 748 torr. How many grams of Zn have been consumed? The vapor pressure of water at this temperature is 26.74 torr. Zn (s) + H2SO4 (aq) → ZnSO4 (aq) + H2 (g)

How many milliliters of 0.152 M Ba(OH)2 are required to neutralize 20.00 mL of 0.263 M HCl, according to the reaction below? Ba(OH)2 (aq) + 2 HCl (aq) → BaCl2 (aq) + 2 H2O (l)

Calculate the ΔH°rxn of combustion of C3H6(g),                   C3H6(g)  +  9/2 O2(g) 

In an experiment, a student placed a beaker on a balance and the mass of the beaker was 132.5 grams.  The student then added some copper to the beaker, the mass increased to 147.3 grams.  How many moles of copper did the student have? (enter your answer with 3 decimal places and no units, the understood unit is mole)  

Calcium hydride (CaH2, molar mass 42.10 g/mol) reacts with water to form hydrogen gas. How many grams of CaH2 are needed to generate 48.0 L of H2 gas at a pressure of 0.888 atm and a temperature of 32°C.? (R = 0.08206 L·atm/mol·K) CaH2 (s) + 2H2O (l) → Ca(OH)2 (aq) + 2H2 (g)

Determine the formula mass for Iron (V) oxide an imaginary compound. (Enter your answer with 4  sig figs and no units).

Give the condensed electron configuration for each of the following: (a) Fluorine, F (b) Iron plus two ion, Fe+2

When  [mLi] grams Li2CO3 is mixed with  [mBa] grams BaCl2, a precipitate forms.  Give the balanced molecular equation below, determine the  theoretical yield of the solid product.  (enter your answer as a three decimal and no units, the understood unit is grams)   Li2CO3 (aq) +  BaCl2 (aq)

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What type of reaction is the one shown below?       ZnBr2(aq) + K2CO3(aq) → 2 KBr (aq) + ZnCO3(s)