What type of elements make up most of the periodic table

Which best represents the law of conservation of mass?

Which is not an observation? A. The mouse is eating. B. The mouse is hungry. C. The mouse has grown 2 cm. D. The mouse has consumed 15 mL of water.

A sample of gas has a pressure of 3.00 atm at 25 degrees Celsius. What would the pressure be at 52 degrees Celsius if the volume stays constant? Which gas law does this problem represent?

What do nuclear reactions change in atoms

Examine the nuclear reaction: (1/1) H + (1/0) n--> (2/1) H. Why is this classified as a nuclear reaction rather than a chemical reaction? It is not balanced. A new compound is formed. A change has occurred in a nucleus. A new element has been formed.

How many grams of NH3 are needed to provide the same number of molecules as in 0.55 grams of SF6?

Round 129.752416 to the requested number of significant figure a. 3 significant figures c. 6 significant figures_22 b. 4 significant figures d. 7 significant figures

What is the [oh-] in a sample of lime juice with a ph of 2.0?

What is the chemical name for nicl2?

How to determine the formula is you know g and L?