Is perfume evaporating on your skin a physical or chemical change?

You are presented with a mixture of iron beads and iron filings. how can you separate them? use a magnet dissolve the filings in water use a screen distillation

A sample of nitrogen gas, (N2), occupies 45.0 mL at 27.00∘C and 80.0 kPa. What will be the pressure if the gas is cooled to - 73.00∘C at constant volume?

Describe the formation of an ionic compound.

45 Which type of equilibrium exists in a sealed flask containing Br2 (ℓ) and Br2 (g) at 298 K and 1.0 atm? (1) static phase equilibrium (2) static solution equilibrium (3) dynamic phase equilibrium (4) dynamic solution equilibrium

The rock cycle the rock label b is

What on a bird, besides it's feet, is chemically similar to scales? A. beak B. feathers C. wings

What are the carbon (C) and oxygen (O) in carbon dioxide (CO2) ? (select all that apply) A) Atoms B) Compounds C) Elements D) Molecules

What does the chemical formula C3H2O, tell about a molecule of the compound it represents?

No two different elements will have the atomic number.-

Which two scenarios illustrate the relationship between pressure and volume as described by Boyle's law? 1. The pressure in a closed bottle decreases when the bottle is squeezed. 2.