Determine the formula mass for Gallium(I) Sulfide an imaginary compound. (Enter your answer with 4  sig figs and no units).

You place a 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  grams Na2CO3 is mixed with 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 grams.  After adding an unknown liquid to it, total mass became 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)