List a homogeneous material that is not a pure substance

Which element has no stable isotopes? 1. CO27 2. Sb51 3. TH90 4. Pb82

One classic definition of life is "a self-replicating molecular assemblage." however, clay particles (in clay soil) contain layered aluminum and iron compounds that determine the pattern of the adjacent layers of sediment.

What are the four energy sublevels electrons can be found in? A. a, b, c, and d B. s, p, d, and f C. 1, 3, 5, and 7 D. alpha, beta, gamma, and omega

Manganese dioxide (MnO2 (s), Delta. Hf = - 520.0 kJ) reacts with aluminum to form aluminum oxide (AI2O3 (s), Delta. Hf = - 1699.8 kJ/mol) and manganese according to the equation below.

Filtration and dialysis are techniques that rely on differences in particle size to separate mixture components. True False

If a new substance is formed in a chemical reaction, what atoms do they consist of?

What is a scientific explanation for a range of hypotheses and observations supported by testing

A chemical reaction involves the rearrangement of atoms to form new molecules. During a chemical reaction, however, atoms are neither created nor destroyed. Which of the following is true about the atoms involved in a chemical reaction? A.

What is the new concentration, after diluting 300 mL of a 1.5 M LiCl solution to 1L

The answer that he gave was wrong