Is elemental sulfur a pure substance

Why does helium raise you voice

Helium is most likely to behave as an ideal gas when it is under (1) high pressure and high temperature (2) high pressure and low temperature (3) low pressure and high temperature (4) low pressure and low temperature

Classify each of the following as a physical or chemical property

Using the periodic table, predict which element-potassium, aluminum, or iron-is most reactive. explain your answer.

Students planted one hundred flowers. They obscrvod the growth of their plants once a week. Which tool could be used to record their observations? ruler thermometer computer

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?