Which mineral is softer than fluorite

What type of orbital overlap is responsible for the π bond between carbon and oxygen in the molecule below? g?

If you are given a 2,900-gram sample of Hydrogen, and hydrogen has a half-life of 2,450 years. How much hydrogen is left after 19,600 years?

Gold is alloyed (mixed) with other metals to increase its hardness in making jewelry. A) Consider a piece of gold jewelry that weighs 9.40 g and has a volume of 0.675 cm3. The jewelry contains only gold and silver, which have densities of 19.

Given: CH4 + 2O2 → CO2 + 2H2O, ΔH = - 890 kJ/mol How much energy is released when 59.7 grams of methane (CH4) reacts with oxygen? The combustion of 59.7 grams of methane releases kilojoules of energy.

Technology has given rise to industry. True or False

Ab2 has a molar solubility of 3.72*10-4 m. what is the value of the solubility product constant for ab2? express your answer numerically.

Thermal decomposition of sodium azide (NaN₃) into nitrogen gas and sodium metal is used to inflate car airbags. The reaction proceeds by the following chemical reaction. 2NaN₃ (s) ⟶3N₂ (g) + 2Na (s) How many grams of NaN₃ are need to inflate a 10.

Is salt water acidic, basic or neutral

The process of gathering knowledge about the natural world

4. Which of the following elements has the greatest electronegativity? a. Krypton b. Bromine c. Phosphorous d. Sulfur