When the equation Fe + O2→Fe2O3 is balanced, the coefficient for O2 is:

a. 4

b. 3

c. 1

d. 2 D?

A substance that conducts electricity, is malleable, ductile, and has luster would be classified as a

Which of the following would a chemist be most likely to study? a. The developmental stages of corn b. Using corn to develop a new polymer c. The type of insects that eat corn d. The disease resistance of genetically midified corn

Ibuprofen, a common pain remedy, has an empirical formula of C7H9O and a molar mass of approximately 218.078 grams per mole. What is the molecular formula of ibuprofen?

A liquid has a volume of 34.6 ml and a mass of 46.0 g. what is the density of the liquid?

Roundup an herbicide manufactured by monsanto has the formula c3h8no5p. how many moles of molecules are there in a 500g sample of roundup?

What is the symbol for the second most common element in the universe? a. H b. C c. Fe d. He?

Which class of organic compound would neutralize a carboxylic acid? O aldehyde amine alkyl halide ether

Calculate the molarity of the solution. 29 g of NaCl (g. f. w. = 58.5 g/mol) in 0.030 liters. 0.015 M 17 M 67 M

How can scientists study the composition of distant stars?

When an ionic compound such as sodium chloride (NaCl) is placed in water, the component atoms of the NaCl crystal dissociate into individual sodium ions (Na+) and chloride ions (Cl-). In contrast, the atoms of covalently bonded molecules (e. g.