1) Copper oxide and carbon combine to produce metallic copper. Which of these is the balanced equation for this reaction?

A. Cu2O+C - > 2Cu+CO2

B. 2Cu2O+C - > 4Cu+CO2

C. 3Cu2O+C - > 3Cu+CO2

D. 2Cu2O+2C - > 2Cu+2CO2

Calculate the average atomic mass of chlorine if 75.77% of its atoms have a mass of 34.97 amu and 24.23% of its atoms have a mass of 36.96 amu.

How many miles are there in 20g of KClO3 (k=39 Cl=35.5 O=16)

Which substance has the highest ignition temperature? a. benzene b. turpentine c. kerosene d. fuel oil #2?

What is the molecular formula of tear?

The electron configurations of two unknown elements are x and y. X: 1s2 2s2 2p6 Y: 1s2 2s2 2p6 3s2 3p5 which statement is most likely correct about the two elements

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

The aromatic amino acids are synthesized in humans by a pathway beginning with reaction of indole with serine. synthesized in bacteria in a pathway shared by all three, up to the production of the intermediate chorismate.

Which element is a liquid at 25 celsius degrees and 1.0 atm? (A) bromine (B) krypton (C) phosphorus (D) xenon