5- Given the reaction 4FeS2 + 11 O2 → 2Fe2O3 + 8SO2
What mass of SO2 is produced from reaction of 3.8 g of FeS2 and excess O2?
6- What mass of SO3 forms from the reaction of 4.1 g of SO2 with an excess of O2?
7-
C6H12O6(s) + 6 O2(g) → 6 CO2(g) + 6 H2O(l)
Use the equation to answer the following questions:
a)10 grams of glucose (C6H12O6) react in a combustion reaction. How many grams of each product are produced?
b) Find the number of molecules of CO2 produced. c) Find the number of molecules of water produced.

im not exactly sure but i think its b!

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

confused

confused             hewdejdnjnjsnd

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante