Define element and compound. explain the difference between an element and a compound.

What is the new mass/volume (m/v) % of a koh solution that is prepared by diluting 110 ml of a 6% (m/v) koh solution to 330 ml?

In atomic emissions spectroscopy, the atom (s) absorb energy, become excited, and release energy in what form?

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

What information does a molecules molecular structure give

Energy can make matter a. move b. changec. work d. all of the above

The rate constant for the decomposition of acetaldehyde, CH₃CHO, to methane, CH₄, and carbon monoxide, CO, in the gas phase is 1.32 ✕ 10⁻² L/mol/s at 707 K and 3.20 L/mol/s at 851 K. Determine the activation energy (in kJ/mol) for this decomposition.

Northern China experienced drought and southern China had floods in 1997 following warmer-than-average water temperatures in the eastern Pacific Ocean. What likely caused these weather events? A. The jet stream B. La Niña C. An occluded front D.

Would the local wind change if it was nighttime

Does the radius of magnesium increase or decrease as it loses electrons?

Rachel is given 50 grams each of three different white powders that look very similar. She is told that each of these powders is commonly used in cooking. Without tasting any of them, she is asked to try to identify them.