Anything that contains only one kind of material?

What is nitrogen classified as

Scientists in a test lab are testing the hardness of a surface before constructing a building. Calculations indicate that the entire structure would sink by a certain amount for every additional floor that is added.

An unstable nucleus which starts a decay process is called the parent nuclide. True False

Which of the following is a large-scale, slow-moving natural change? A) glaciation B) hurricane C) drought D) famine

2 A (g) + B (g) / longrightarrow⟶ 2 C (g) Rate = k [A][B] At the beginning of one trial of this reaction, [A] = 3.0 M and [B] = 1.0 M. The observed rate for the formation of C is 0.36 mol L-1 sec-1.

A group of students wants to see how temperature affects the time it takes for spilled water to dry up in the investigation what will be the dependent and independent variables

What is not true of white light?

Diatoms and some yeasts are unicellular eukaryotes that have mechanisms of nuclear division?

Consider the circuit 9.012 9.012 What is its equivalent resistance? Answer in units of 12.

out of 2.00 50 mL of water is added to 30 mL of a 0.50 M salt solution. What is the new concentration? (To write your answer using scientific notation use 1.0E-1 instead of 1.0 x 10-1)