Caculate the mass of oxygen needed to burn 175.0grams of octane

There are 2.2 mg of lead in exactly 500 g of a water sample. What would the concentration of lead be in parts per million? Round to the nearest tenth. Don't forget the units.

What is the name of the outermost layer that forms a boundary around the outside of each cell

What is the average salt content

Inorganic chemicals: Select one: a. may be toxic to aquatic organisms, but are safe for human consumption. b. are easily degraded, or broken down, in the environment. c. are contaminants that contain carbon in addition to other elements. d.

What powers explosions and fire

Assign the oxidation number for (NH4) 3PO4

An element that is in the same column as element c is likely to have which properties

The ionic equation for MgCl2 and KOH.

Write chemical equation and balance for copper (II) nitrate and barium sulfide

What is the density of a block of salt having a mass of 8.0g and a volume of 25cm cubed