A change in what factor will affect the rate of reaction only when gases are involved

A metal melts at 450 degrees celsius. Is this property of the metal classified as chemical or physical?

How many grams of h2 gas can be produced by the reaction of 63.0 grams of al (s) with an excess of dilute hydrochloric acid in the reaction shown below? 2 al (s) + 6 hcl (aq) → 2 alcl3 (aq) + 3 h2 (g) ?

Write the balanced equation showing hydrogen iodide (HI (g)) dissolving in water.

What do scientist do to easily share measurement data they can understand

Which atom absorbs more energy, one in which an electron moves from the second shell to the third shell or an otherwise identical atom in which an electron moves from the first to the third shell?

Assume 3 molecules of Fe react according to the following equation. 3Fe + 4H2O Fe3O4 + 4H2 How many molecules of H2 are produced? How many water molecules are required? What is the mole ratio of Fe to H2O?

10.0 mL of a HF solution was titrated with a 0.120 N solution of KOH; 29.6 mL of KOH were required to completely neutralize the HF. Calculate the normality of the HF solution.

The number of grams present in 1.35 mol of Fe is

Which can associate a suspect's gun with a crime?

In which era did the first fish appear? a. Carboniferous b. Paleozoic C. Mesozoic d. Permian