Question 7 (1 point) When 60.0 g of aluminum react with hydrochloric acid, how many moleculues of hydrochloric acid react?
2AI + 6HCI -> 3H2 + 2AlCl3
O a
1.34 x 10^24 molecules of HCI-
Ob
Ос
4.46 x 10A 23 molecules of HCI
4.02 x 10^24 molecules of HCI:
2.01 x 10^24 molecules of HCI

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%

elements make up everything, and they combine to make compounds.

the answer is c

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.

i wish i could but this one is weird give me abc and i can solve it.