Answer: D. It reacts with oxygen in the presence of moist air.
Explanation:
The element Gold, does not react with oxygen,hence it is not affected by corrosion,neither does it rust.
<span>The value of enthalpy of a reaction can be a useful tool in determining the type of reaction it is. If the enthalpy is negative the reaction is exothermic and if the enthalpy is positive the reaction is endothermic. Hope this answers the question. Have a nice day.</span>
First, find the number of moles of glucose in 30.5 g.
You need the molar mass.
Molar mass of C6H12O6 = 6 * 12.01 g/mol + 12 * 1.01 g/mol + 6*16g/mol = 180.2 g/mol
number of moles = mass in grams / molar mass = 30.5 g / 180.2 g/mol = 0.169 mol
Second, use molecular formula
1 mol of C6H12O6 contains 6 moles of O.
Then, 0.169 moles of C6H12O6 contains 6 *0.169 = 1.014 moles of O.
Third, multiply by Avogagro's number:
1.014 moles * 6.022 * 10^23 atoms / mole = 6.106 * 10^ 23 atoms.
Answer: 6.106 * 10 ^23 atoms of oxygen.
