Is coffee a pure substance or a mixture?

Cathode is zinc or copper

In the synthesis reaction, the white powder produced is magnesium oxide (mgo, mm = 40.3 g/mol). how many moles of magnesium oxide were formed (number of moles = mass (g) / molar mass (g/mol)) ? choose the closest answer. a. 0.21 moles b. 0.

Provide a method for separating the mixtures of two or three compounds, dissolved in a solvent diethyl ether. In each case one of the components will be a neutral compound. You should give your answer in the form of a flow chart (see Section 12.12).

What is a group or family on the periodic table

Indicate whether the substance exists in aqueous solution (a) entirely in molecular form, (b) entirely as ions, (c) or as a mixture of molecules and ions. HF, CH3CN, NaClO4, Ba (OH) 2

Many pain relief pills have powder that is enclosed inside a capsule. Why might this type of medicine work faster than a tablet if they both have the same amount and type of medicine?

The element silver has an atomic weight of 108 and consists of two stable isotopes silver-107 and silver-109. The isotope silver-107 has a mass of 107 amu and a percent natural abundance of 51.8 %.

A scientist uses materials in her lab to cut a DNA sample into fragments. What process is the scientist using? A. Gel electrophoresis B. Use of restriction enzymes C. Polymerase chain reaction (PCR) D. Karyotyping

Aluminum is more reactive than iron, yet it is used today for a variety of applications in which iron would corrode (cans, rain gutters, etc.).

Identify three types of coral reefs