What is the mass of calcium in 2.3•10^23 molecules of calcium phosphate

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.