If a ball is positioned at 3 feet, and let go, will it return at the same exact height?

The number of which subatomic particle designates the atomic number of an element? select one:

Which of the following materials is a substance. air gasoline stainless steel or silver

What are two ways that compounds are different from the elements that form them?

According to the law of conservation of energy, when a lawn mower uses 750 J of chemical energy from gasoline, how much of this energy will be transformed into mechanical, sound, or energy? A. 325 J B. 750 J C. 162 J D. 1500 J

the solubility in mol/dm3 of 20.2g of potassium trioxonitrate (V) dissolved in 100g of water at room temperature is

Which ionic compound is the most likely to dissolve in water? CaSO4 Na2SO4 BaSO4 SrSO4

Calcium (atomic number 20) has electron configuration 1s2,2s2,2p6,3s2,3p6,4s2. The atomic number of scandium is 21. Which orbital does the 21st electron enter? a. 3d b. 4p c. 4d d. 4f

In these solutions, identify the solute and the solvent Sea water, a solution composed of a variety of salts dissolved in water. The salt is the Soda water, a solution composed of carbon dioxide gas dissolved in water.

What is an Element and how it different from a Atom?

4 HCI + O2 - > 2 H2O + 2 CH2 How many moles of H2O can be produced from 30. moles of HCI?