3. Some ionic compounds are hydrates - solid compounds to which is bound a specific percentage of
water. Some hydrates melt when heated and release energy when they solidify. For example, at
32°C, liquid Glauber's salt - sodium sulphatedecahydrate, Na2SO4. 10H2O(l) - solidifies and releases
78.0kJ/mol of energy. Calculate the enthalpy change when 2.50kg of Glauber's salt enters the solid
state? (ans: -605kJ]

i think its 5049.

i hope this !

(b) which contains higher levels of vitamin b, oranges or spinach?

explanation:

you can eliminate a, c, and d because they are questions based on opinions.

here is table 2-2:

country

percent of eligible voters that voted

rank

united states

44.9%

138

canada

60.1%

107

costa rica

84.6%

14

hungary

66.9%

82

japan

57.0%

118

egypt

27.7%

159

south africa

85.5%

10

ans is no, the data set cannot be plotted as a single circle graph