Que cambios son fisicos y cuales son quimicos?

a) quemar papel

b) limpiar objetos de plata

c) hacer hielo en el congelador

d) fundir hierro

How does a tree speed up erosion? How can it slow erosion down?

Phthalic acid has a solubility of approximately 18g per 100 ml of water at 100°c and 0.62g per 100 ml of water at 25°c.

What is the correct name for NC13? (a) trinitrogen chloride (b) mononitrogen chloride (c) nitrogen trichloride (d) nitride trichloride (e) mononitride chloride

Draw the structure for chloric acid hclo3

What is meant by the phrase specific heat capacity? What is the value for the specific heat capacity of water (the unit should be J/g C) ?

Glucose is not made from which of the following

Rank the temperatures from the highest to the lowest. 133F 351K 25C 273K 146C 58F 95F

Calculate the density of sulfuric acid if 35.4 mL of the acid weighs 65.14 g.

Where the single machos?

A reaction will be spontaneous only at low temperatures if both ΔH and ΔS are negative. For a reaction in which ΔH = - 320.1 kJ/mol and ΔS = - 86.00 J/K · mol. Determine the temperature (in °C) below which the reaction is spontaneous.