Where can we find petroleum? and how is it formed?

The pressure of a gas is 750.0 torr when its volume is 400.0 mL. What is the pressure if the gas is allowed to expand to 600.0 mL at constant temperature?

Two moles of propene (c3h6) gas react with nine moles of oxygen (o2) gas to produce six moles of carbon dioxide gas (co2) and six moles of water gas (h2o).

What is meant by enthalpy change?

Why is data important to scientific endeavor? A - Data is the information that supports or does not support a hypothesis. B-Data is the information that proves all hypotheses are correct.

Quota sampling is mostly based on participant availability or volunteers.

Identify each enthalpy change by name and classify each change as exothermic or endothermic. 1. 1 mol NaCl (s) à 1 mol NaCl (l) 2. C4H10 O (l) à C4H10O (g) 3. H2O (g) à H2O (l) 4. 1 mol NaCl (s) + 3.

Calculate the number of atoms in a 1.26*103 g sample of silicon.

A region that has a large number of atoms whose magnetic fields are lined up parallel to a magnet's field is A. the magnetosphere. B. the magnetic declination. C. a magnetic domain. D. a ferromagnetic region.

Name the element that has atoms with the same electronic structure as sulfur ion

The mass of a 2.0 centimeter sample of a substance is 3.2 grams. Calculate the density of the substance