Word elements can be used to show chemical reactions. When hydrogen burns in oxygen. Water is produced. The word equation is hydrogen + oxygen - water. Write the word equation for iron and sulphur combining to form iron sulphide.

Why do some parts of the transition metal block seem to violate our established relationship between the number of d orbital electrons and metallic bond strength? Use 2 groups of elements and describe their properties to support your explanation

Metals are known to have abundant free electrons. A metallurgical scientist wants to detect the presence of metals in a rock sample.

The density of air at ordinary atmospheric pressure and 25 ∘C is 1.19 g/L. What is the mass, in kilograms, of the air in a room that measures 12.5 * 19.5 * 6.0 ft?

How many grams of NaOH are needed to prepare 100. ml of a 0.20 M NaOH solution

A compound is 54.53% C, 9.15% H, and 36.32% O. What is its empirical formula? The molar mass of the compound is 132 amu. What is its molecular formula?

Determine the number of moles in a container of gas at STP with a volume of 99.2L

State the number of significant 2804

For the reaction 2N 2O (g) ⇌ O 2 (g) + 2N 2 (g), what happens to the equilibrium position if the pressure increases?

A chemistry student needs 90.0g of glycerol for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of glycerol is 1.26·gcm-3. calculate the volume of glycerol the student should pour out.

A sulfuric acid solution containing 571.6 g of H2SO4 per liter of solution has a density of 1.329 g/cm3. Calculate (a) the mass percentage, (b) the mole fraction, (c) the molality, (d) the molarity of H2SO4 in this solution.