Which statements are true of heterogeneous mixtures?

1) They settle out

2) The proportions of solute to solvent may vary.

3) The solute is evenly distributed throughout

4) They are composed of two solvents and to soutes

1 and 2

2 and 4

3 only

2 only

The shininess of an element is also referred to as "metallic luster." which of the following elements is most likely to have a metallic luster? a. arsenic b. rhodium c. chlorine d. hydrogen

Degradates, unlike their parent compounds, are always completely harmless true or false

The Prandtl number, Pr, is a dimensionless group important in heat transfer. It is defined as Pr = Cp*mu/k where Cp is the heat capacity of a fluid, mu is the fluid viscosity, and k is the fluid thermal conductivity. For a given fluid, Cp = 0.

Write the chemical formulas for the ionic compound vanadium (v) oxide

To two decimal places, write the molar masses of carbon, neon, iron, and uranium

Fumaric acid is an organic compound composed of 41.39%, 3.47%, and the rest oxygen. If 0.288 mol of fumaric acid has a mass of 33.4 g, what are the empirical and molecular fomulas of fumaric acid

What is an isotope? Give an example of an element with isotopes.

Consider the reaction between liquid water and aqueous magnesium nitride to form solid magnesium oxide and ammonia gas. If magnesium nitride is present in excess, how many moles of water are needed to form 9.17*1023 ammonia molecules?

The properties of elements are arranged by ... A. mass numbers B. atomic masses C. atomic radii D. atomic numbers

When a tire is inflated with air is it a chemical or physical change?