Which of the following is not a pure substance

There are three voltaic cells. In each voltaic cell one half-cell contains a 1.0 M Fe (NO3) 2 (aq) solution with an Fe electrode. The contents of the other half-cells are as follows:Cell 1: a 1.0 M CuCl2 (aq) solution with a Cu electrodeCell 2: a 1.

Hydrazine (N2H4), a rocket fuel, reacts with oxygen to form nitrogen gas and water vapor. The reaction is represented with the equation: N2H4 (l) + O2 ( g. → N2 ( g. + 2H2O ( g.

Which of the following methods is most appropriate to use to determine the number of different colored components in a sample of black ink?

Solid calcium carbonate caco3 decomposes into solid calcium oxide and carbon dioxide gas. write a balanced chemical equation for this reaction

Zinc metal reacts with hydrochloric acid solution according to the reaction: zn (s) + 2 hcl (aq)  zncl2 (aq) + h2 (g). suppose 0.103 g of zn (s) is combined with 50.

Which is measured using a calorimeter

5) Solid lithium metal is added to an aqueous solution of magnesium chloride forming lithium chloride solution and solid magnesium a. If you begin the reaction with 15.0 g of lithium and 25.

Which element easily loses one electron to form a positive ion? A. Magnesium (Mg) B. Lithium (Li) C. Nitrogen (N) D. Fluorine (F)

What is an indication a chemical reaction has occurred? A.) Formation of gas B.) Boiling of a substance C.) Melting of a substance D.) Freezing of a substance

A saline solution contains 1.6 % NaCl by mass. How much NaCl is present in 57.2 g of this solution?