Do objects weigh less on earth then on mercury

What is hyphen notation

If you want to make more shells (CaCO3) then which direction should the reaction proceed?

Which seismic wave moves through Earth the fastest?

A mixture of 10 cm3 of methane and 10 cm3 of ethane was sparked with an excess of oxygen. After cooling to room temperature, thr residual gas was passed through aqueous potassium hydroxide. What volume of gas was absorbed by the alkali?.

A mixture of three gases has a pressure at 298 K of 1380 mm Hg. The mixture is analysed and is found to contain 1.27 mol CO2, 3.04 mol CO, and 1.50 mol Ar. What is the partial pressure of Ar?

What happens to the total mass of a substance undergoing a physical change

32 g of sulfur will react with 48 g of oxygen to produce 80 g of sulfur trioxide. if 20 g of sulfur and 100 g of oxygen are placed into a sealed container and allowed to react, what is the mass of sulfur trioxide in the container after the reaction

Water exhibits high levels of cohesion due to the polarity of the molecule (positively and negatively charged sides). given this information, which type of bond is responsible for water's cohesion and which atoms interact to form this bond?

scientist have found many marine fossils on the mountain far from any ocean or sea what is the best explanation for these fossils

The change in energy needed to change the state of a substance is