19) Which if the following is a heterogeneous mixture?

a. Air

b. Steel

d. Soil

What properties of metals are explained by its mobile electrons? Strength, malleability, ductility, heat conduction, current conduction, luster, opacity

Diatomic O2 can react with the element magnesium to form magnesium oxide (MgO). The balanced chemical equation is: O2 + 2 Mg → 2 MgO If 97.

Which object has the smallest volume? * bowling ball soccer ball baseball

Why is it important to calibrate your pipet before beginning an experiment?

A mixture with medium sized particles that do not settle out is called

A substance contains 36.1 percent calcium and 63.9 percent chlorine by weight. What is the empirical formula of the given compound? A. CaCl B. Ca0.9Cl1.8 C. CaCl2 D. Ca2Cl4

A sample of bismuth weighing 0.687 g was converted to bismuth chloride by reacting it first with HNO3, and then with HCI, followed by careful evaporation to dryness. The mass of the bismuth chloride obtained was 1.032 g.

When 1 g of sodium chloride (NaCl) is placed in 100 g of water, a solution results. Once the solution is prepared, water is now considered what part of the solution?

1. How is pressure affected as depth increases? 2. As the sun heats the surface of the oceans, two layers of water result. What separates the layers? 3. How is temperature affected when? (a) the depth increases (b) the latitude increases 4.

Are nails in a jar with water a chemical change