You place a [m] g of gold bar into a graduated cylinder containing 24.0 ml of water.  What’s the final volume of water level in the graduated cylinder? (density of gold is 19.32 g/mL)  (enter your answer with 1 decimal place and no units, the understood unit is mL)

When  [mNa] grams Na2CO3 is mixed with [mCa] grams CaCl2, 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)   Na2CO3 (aq) +  CaCl2 (aq)

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

What type of reaction is the following? Ca(OH)2(s) + 2 HNO3(aq) 

The mass of a graduated cylinder is [m] grams.  After adding an unknown liquid to it, total mass became [n] grams.  The volume of the liquid is shown below (in mL).  What’s the density of the unknown liquid? (enter your answer with 3 decimal places and no units, the understood unit is g/mL)      

The volume occupied by 1.5 mol of gas at 35°C and 2.0 atm pressure is __________ L.

Classify the reaction below. FeCl3(aq)  +  3 NaOH(aq) 

Sodium hydride reacts with excess water to produce aqueous sodium hydroxide and hydrogen gas. How many grams of NaH will produce 0.923 L of gas at 23.5oC and a barometric pressure of 765 torr, when the hydrogen is collected over water. The vapor pressure of water at this temperature is 28 torr.  NaH (s) + H2O (l) → NaOH (aq) + H2 (g)

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)