Questions in chemistry

Questions in chemistry

[Done] The combustion of propane may be described by the chemical equation: \[ \text{C}_3\text{H}_8(g) + 5\text{O}_2(g) \rightarrow 3\text{CO}_2(g) + 4\text{H}_2\text{O}(g) \] How many grams of \(\text{O}_2(g)\) are needed to completely burn 40.4 g of \(\text{C}_3\text{H}_8(g)\)?

[Done] How many occupied orbitals does a fluorine atom contain in the ground state?

[Done] Which group of elements is the most unreactive? Why?

[Done] Name two ways archaea differ from bacteria.

[Done] What is the maximum mass of methane (CH₄) that can be burned if only 1.0 g of oxygen is available? How do you figure it out?

[Done] Water in a pan over a radiator evaporates much faster than water in a pan on a table. Why does this happen?

[Done] Why is it correct to say seawater is a mixture?

[Done] How can you demonstrate that a piece of chalk has mass?

[Done] Is a pot holder a conductor or an insulator?

[Done] What is a direct combination reaction?