What only sure evidence for a chemical reaction is?

Which statements about moon phases In a lunar month are true? Choose more than one answer. 1. The same pattern of phases repeats monthly 2. Waxing moon phases are visible between the new and full moon 3.

What number of Fe atoms and what amount if miles of Fe atoms are in 500 g of iron?

what is the denisty of 5.4gml and a voulme of 78ml

0.44 mL/min to microliters per second

Ammonia is produced by the millions of tons annually for use as fertilizer. It is commonly made from N2 and H2 by the Haber process.

What is the temperature of 100 liter container having 1 mole of an ideal gas at a pressure of 20 kilopascals

5.2*10^26 molecules of ch4 in volume

Which of the following statements about igneous rocks is correct A. intrusive igneous rocks are formed when magma is called above the ground. B. Extrusive igneous rocks are formed when magma is cooled above the ground C.

The compound KOH is called

A balloon contains 1.00 mol helium gas at STP. What will the volume of the balloon be if the pressure increases to 2.00 atm?