When gold is melted and formed in a mold to make a piece of jewelry, what type of change is taking place?

The planets are divided into two groups name them

True or false? atomic bombd work by atomic fission

When is using the median more useful

Aqueous sulfuric acid (H2SO4) reacts with solid sodium hydroxide (NaOH) to produce aqeous sodium sulfate (Na2SO4) and liquid water (H2O). what is the theoretical yield of water formed from the reaction of 5.9 g of sulfuric acid and 6.

The frequency of a water wave that has a wavelength of 0.5 m and a speed of 4 m/s

How much energy is needed to convert 57.3 grams of ice at 0.00°c to water at 75.0°c? specific heat (ice) = 2.10 j/g°c specific heat (water) = 4.18 j/g°c heat of fusion = 333 j/g heat of vaporization = 2258 j/g?

A certain first-order reaction (A→productsA→products) has a rate constant of 9.90*10-3 s-1s-1 at 45 ∘C∘C. How many minutes does it take for the concentration of the reactant, [A][A], to drop to 6.

Assign the oxidation number for (NH4) 3PO4

When gold is melted and formed in a mold to make a piece of jewelry, what type of change is taking place?

Do pure substances have the same chemical and physical properties