Which polymer is a biopolymer?

polystyrene

polyethylene

polylactic acid

polyvinylchloride

A 70.0-g piece of copper metal at 86.0 ∘c is placed in 50.0 g of water at 16.0 ∘c. The metal and water come to the same temperature of 24.0 ∘c. What is the specific heat, in j/g∘c, of copper?

Acid rain can cause health problems in people True Or False

What does the concentration of an acid or base tell us?

Is layers of sediment forming at the bottom of the ocean erosion?

What product would be formed if acetone were added to the grignard reagent instead of benzophenone?

What is the mass of 2N at 0.2829 atm 1.35 L and 25°C

If an ice cube melts at 0ºC but water also freezes at 0ºC, what is the difference between melting and freezing in terms of ... 8. The energy involved in the phase changes and 9. The motion of the particles of the substances during the phase changes?

What is the element Ar classified as in the periodic table?

Using the clausius clapeyron equation determines the heat of vaporization from experimental measurements of vapor pressure. the vapor pressure of dichloromethane is measured as a function of temperature and the results are tabulated.

Why is it important for people to understand how to properly dispose of waste in a watershed?