Mass of an atom of element X is equivalent to the total mass of 7H atoms. Give the name and symbol of the element represented by X ​

Agas can holds 2.0 gal of gasoline. what is this quantity in cubic centimeters?

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Show how to convert the temperature 84.7° c to kelvin. include all steps and label the final answer.