Which best describes a molecule? a unit made of different kinds of elements a unit made of only one kind of element a unit made of two or more atoms a unit made of a single atom

A flexible container is put in a deep freeze. Its original volume is 3.00 m3 at 25.0°C. After the container cools, it has shrunk to 2.00 m3. Its new temperature in degrees Celsius is

What percentage of water on earth is fresh water

The gas carbon dioxide is a pure substance. Which of the following is true about carbon dioxide? Carbon and oxygen are chemically bonded in it.

Determine the temperature (in K) of 1.5 moles of gas contained in a 5.5 L vessel at a pressure of 192.4 kPa.

Engineers are starting on a new project to develop technology. Which of these statements does not describe something they might do at the very beginning of the process? A. Look at the benefits and challenges of using specific materials. B.

How does magnification occur in an electron microscope?

How many grams of calcium phosphate are required to give 30 grams of phosphorus

Why can damage to a nucleic acid lead to a person not producing an enzyme?

Use the Balmer's equation to determine : (a) The frequency in per second of the radiation corresponding to n=5. 10) The wavelength in nanometers of the line in the Balmer series corresponding to n=7.

What is the precipitation reaction of sodium nitrate and lead (II) ?