Q3 Consider the reaction:
C2H5OH(1) + 302 (9) ---> 2002(g) + 3H2O(1)
AH--1.37X103 kJ
When a 8.11 g sample of carbon dioxide is burned, how much energy is
released as heat?
A. 126.3 kJ of heat released
B. 0.737 kJ of heat released
C. 148.7 kJ of heat released
D. 3.40 x 104 kJ of heat released

How many neutrons does a atom of cobalt have?

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

Which statement are accurate about snow flakes