What are some products around the house that might expose you to
VOCs?

paints

wood preservatives.

aerosol sprays.

cleansers and disinfectants.

moth repellents and air fresheners.

stored fuels and automotive products.

hobby supplies.

dry-cleaned clothing.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.