John roller skates 48 km in 3 hours. What is his average speed in kilometers per hour?
A. 16 miles per hour.
B. 1.6 km/hr.
C. 16.5 km/hr west.
D. 16 km/hr.
Hu like I need it rn❤️

According to the diagram; a) identify the anode of the cell and write the half-reaction that occurs there b) write the overall equation for the reaction that occurs as the cell operates c) calculate the value of the standard cell potential ,e cell. d)write the shorthand notation of the cell above e)indicate the flow of the electrons on the diagram

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.

How much carbon is stored in the atmosphere as co2