How many grams of C4H10O can be melted by 2.00×103 J if ΔHfus=7.27 kJ/mol?

Which statement is TRUE in describing what occurs when a solid melts to a liquid?

Which of the following elements has the electron configuration of 3s23p5 in its valence shell?

A Geiger-Muller counter detects radioactivity by:

How many total valence electrons are in the phosphate ion?

How many mL of 0.218 M sodium sulfate react with exactly 25.34 mL of 0.113 M BaCl2? Use the given balanced reaction: BaCl2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2 NaCl (aq)

Match each solid with its classification.

A balloon filled with 0.500 L of air at sea level at 1 atmosphere is submerged in the water to a depth that produces a pressure of 3.25 atm. What is the volume of the balloon at this depth?

Hydrogen gas produced in the laboratory by the reaction of magnesium and hydrochloric acid was collected over water at 25°C. The atmospheric pressure at the time was 742.5 mm Hg. What is the pressure of dry hydrogen gas if the vapor pressure of water at 25°C is 23.8 mm Hg?

Consider the following reaction: 2 Mg + O2 → 2 MgO △H rxn = -1203 kJCalculate the amount of heat in kJ associated with complete reaction of 4 moles of Mg.