How many molecules are there in PbS

Which statement explains how commercial land use negatively impacts watersheds? Chemicals in fertilizers run off into water and cause algae blooms. Production of clothing items makes pollutants that contaminate the water.

Magnesium reacts with a certain element to form a compound with the general formula MgX. What would the most likely formula be for the compound formed between potassium and element X?

Which elements can react to produce a molecular compound? (1) calcium and chlorine (2) hydrogen and sulfur (3) lithium and fluorine (4) magnesium and oxygen

What type of reaction 2Mg+O2→2MgO

Explain how 0.5 and 0.5555555 ... are different. which is greater?

Which element has the fewest valence electrons available for bonding? iodine aluminum carbon nitrogen

What is the total value of a small digit in 94257

what is the density of a substance that has a mass of 2.0 g, and when placed in a graduated cylinder the volume rose from 70 mL to 75 mL

A block of lead has dimensions of 4.50cm by 5.20cm by 6.00 cm. The block weighs 1587 g. From this information, calculate the density of lead.

Which states of matter have no definite volume?