Who said atoms are neither created nor destroyed in chemical reactions?

A ball rolls along a smooth horizontal floor at 10 m/s, then starts up a 20 degree ramp. How high does it go before rolling back?

How many moles of MgCl2 are there in 340 g of the compound?

Conservation of mass was discussed in the background. describe how conservation of mass (actual, not theoretical) could be checked in the experiment performed

What kind of information do unit conversions give? A unit conversions express a number in terms of moles B unit conversions give a fractional part of a number C unit conversions give an equal amount but with other units D unit conversions give the

What is a simple definition of atom, particle, and kinetic?

What is the relationship between an atom and a molecule?

Cyclohexane, a commonly used organic solvent, is 85.6% c and 14.4% h by mass with a molar mass of 84.2 g/mol. what is its molecular formula?

On a molecular scale, what is the difference between and acid and a base?

What are some visible signs of an acid-base reaction?

Scientists believe that differences in __ cause her, plastic like rock in the asthenosphere to rise towards Earth's surface