When applying heat to a substance changes the form, but not the identity of the substance, this is evidence of:

a chemical change

a physical change

no change

an anthropomorphic change

Which is classified as a salt ammonia or sodium chloride?

What inference is supported by the graph? The energy of the activated complex (A) is greater than that of the products (C). The energy of the activated complex (B) is greater than that of the reactants (A).

Use the Balmer's equation to determine : (a) The frequency in per second of the radiation corresponding to n=5. 10) The wavelength in nanometers of the line in the Balmer series corresponding to n=7.

Write the complete balanced equation for the reaction that occurs when C3 H8 combusts in O2.

An infrared wave traveling through a vacuum has a frequency of 4.0 * 1014 Hz. What is the wave's wavelength?

For the complete combustion of 5.6dm3 of a gaseuos hydrocarbon CxHy. 28.0dm3 of oxygen gas were used, 16.8dm3 of CO2 gas and 18.0gof liquid water were produced all gases measurement were made at stp. Determine the chemical formula of the hydrocarbon

What kind or plate tectonic boundary is the san anfreas fault?

What is it called when the state of matter that keeps its shape and volume when it's placed in a different container

A 0.1 m solution of which salt is the most basic? (a) nano3 (b) naclo4 (c) nahso4 (d) nahco

How to conduct electricity with light bulb and battery