Carbon is black, crystalline and hard. Oxygen alone is a gas. How does the substance that is formed when these two elements combine differ from carbon?

When observing the effect of surface area on the rate of a heterogeneous reaction, it is common to observe that the mossy zinc is reacting much faster than the zinc granules (at least at the onset of the initial reaction).

The volume of a gas increases when the pressure ___ at constant temperature

When aluminum, Al, metal is dipped in an aqueous solution of hydrochloric acid, HCl, hydrogen gas H_2 is produced with the formation of an aluminum chloride, AlCl_2, solution.

Calculate the energy in joules, 245 Calories = __joules C . 245 Calories

A compound is found to contain 6.360 % silicon, 36.18 % bromine, and 57.46 % iodine by mass. what is the empirical formula for this compound?

A 10 chunk of metal has a specific heat of 0.25 J/g ºC. The temperature is changed from 10ºC to 45ºC. How much heat is required?

In this reaction what is the correct coefficient for sodium chloride? pb (no3) 2? nacl → pbcl2? nano3

Classify each of the following as a path function or a state function. work energy distance traveled enthalpy heat

Flammable materials like alcohol should never be dispensed or used near True or False

The diagram to the right shows energy for two reactions, A and B. Which reaction has the higher Gpx?