Pure copper metal has a very high conductivity. Brass, an alloy of copper and zinc, has a much lower conductivity. Why are the conductivities different? A.
because a chemical reaction has changed the copper into brass
B.
because the physical properties of the mixture are similar to its components
C.
because the physical properties of the mixture are different than its components
D.
because the copper is hidden by the zinc in the brass

Hannah is writing a report on how albedo affects the global climate. she’s proofreading her passage for any factual errors. which sentence must hannah correct before submitting her report? earth receives energy from the sun. this energy drives many of the processes on earth, including its climate. some part of this energy is reflected by earth’s surface. we use the term albedo to describe the reflected energy. albedo of an object is the ratio of the reflected radiation to the total radiation reaching the object. a value of 0 means no energy is absorbed by the object, whereas a value of 1 means that all of the energy is absorbed. in this way, the albedo of an object can influence earth’s atmospheric temperature.

Can someone me with 1 to 4 plz. fast

How many moles of sulfur dioxide are produced when 4.38 moles of oxygen completely react with iron (iv) sulfide