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Given the reaction: 2 Na  +  2 H2O  –>  2 NaOH  +  H2 What is the total number of moles of hydrogen gas produced when 4.0 moles of sodium reacts completely?

If the temperature of 96.5g of water increases from 25.2 ° C to 37.6 ° C, how much heat did the water absorbed? Hint: Specific heat of water is 4.184J/g ° C Answer:[BLANK-1] kJ (Provide your answer with correct sig. figs. and DO NOT include units in your answer, as it has been provided)

An experiment yielded 80 grams of NaCl while the theoretical yield of NaCl was 90 grams.  What is the percent yield?

6 CO2  +  6 H2O  –>  C6H12O6  +  6 O2 The average human requires 115 grams of glucose (C6H12O6) per day.  How many grams of carbon dioxide are required for this amount of glucose? The answer will be in grams; however, do not type in units into the answer box, only numbers.

5.0 moles of NaOH is dissolved in a 500 mL solution.  What is the molarity? Please type in your calculations.

What does the specific heat capacity of a substance or material represent?

What are the units of specific heat capacity?

What value for the calorimeter constant will be used in this experiment for a “coffee cup” calorimeter? Answer: [BLANK-1] J/ ° C (Provide your answer with correct sig. figs. and DO NOT include unit in your answer, as it has been provided)

An atom contains a total of 52 electrons.  When the atom is in the ground state, how many different principal energy levels will contain electrons?

The pressure of 10 mL of a gas at constant temperature is changed from 4 atm to 2 atm.  The new volume of the gas is: