Which statement describes how electric charges affect each other?

1. positive and negative charges repel

2. two positive charges attract

3. two negative charges attract

4. positive and negative charges attract

What happens in a decomposition reaction

Atmospheric pollution is a problem that has received much attention. Not all pollution, however, is from industrial sources. Volcanic eruptions can be a significant source of air pollution.

In general what two classes of materials dissolve in water

How Many atoms are in 1 mole of tantalum, Germanium, Rhodium, Nihonium?

Why Is Water A Polar Molecule? Does It Have Something To Do With The Dipoles Not Cancelling Each Other Out?

5. Identify a suitable method that would be used to separate mixture of the follow [b]Water and ethanol c]Table salt dissolved in water d] iodine and potassium Pul the table below

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?