Which physical changes are endothermic?

(1) melting and freezing

(2) melting and evaporating

(3) condensation and sublimation

(4) condensation and deposition

Human skin an example of a bank because bank

The ray of light which travels towods a mirrors

Hich is an example of a chemical change? mixing of poster colors formation of clouds metal corroding in salt water sugar dissolving in water separating salt from seawater

What is the range of the radii of most atoms in nanometers?

An empty graduated cylinder has a mass of 11.4g. When it is filled with an unknown liquid to the 45.2 mL mark the cylinder and the liquid together weigh 95.1 gram. What is the density of the unknown liquid?

Cooking oil lipids consist of long, unsaturated hydrocarbon chains. Would you expect these molecules to form membranes spontaneously?

Which of the following substances is formed deep under Earth? Chlorophyll Glucose Oil Oxygen 30 pts if someone answer right

a reagent bottle (labelled) is filled with HCL solution and the other (labelled as b) is filled with water. both liquids in the bottle are colourless. what method do you recommend to identify the acid and water?

Which of the following is NOT a chemical reaction? a. ice melts from water b. ammonia breaks up into nitrogen and hydrogen c. hydrogen and oxygen combine to make water

Which type of atom is expected in the products of this chemical reaction? C6H12O6 + 6O2? A. boron (B) B. lithium (Li) C. oxygen (O) D. helium (He)