A good experimental design should always:

include more than one independent variable

have predictable outcomes

be repeatable

more than one of these

How hot can the earth possibly get?

How many unchanged atoms would remain after 3 half-lives if the initial sample had 600 atoms? Explain.

How many moles of carbon (C) atoms are equivalent to 38.1 g C?

What is a rock that forms when pressure, temperature, or chemical processes change an existing rock

Classifying living things

Hypervitaminosis is a serious health threat associated with excessive amounts of ingested fat-soluble vitamins. why do water-soluble vitamins not commonly pose the same threat?

Hydrogen is an element with two naturally occurring isotopes: 2 H and 3 H. This means that 2 H, which has a mass number of 2, has fewer than 3 H, which has a mass number of 3. True/False

C₂H₂ + O2 - CO₂ + H₂ How many moles of oxygen are necessary to react completely with 4.0 moles of propane (CH) ?

What are the two main classifications of energy resources?

A liquid is heated and a solid forms at the bottom of the beaker. Is this a physical or chemical change?