1.How many compounds are there in 3.5 mol Be(OH)2? 2.How many grams are there in 1.2 × 10^24 molecules CO2?

3.How many grams are there in 2.1 mol H2O2?

4.How many molecules are there in 14 g N4O4?

5.How many grams are there in 1.81 x 10^24 molecules H2SO3?

6.How many moles are there in 2.4 x 10^24 molecules P2O4?

7.How many compounds are there in 1.5 mol Li2CO3?

8.How many moles are there in 1.2 x 10^24 molecules H2PO3?

b. atoms in metallic solids are not arranged in a regular pattern

explanation:

hi,

the capital city of australia is canberra.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.