In acids and bases, on the ph scale, is a 14 considered strong for a base, while 8 is weak, and is 1 weak for an acid while 7 is strong for an acid?

How many moles of magnesium are needed to react with 16.0 g of O2? 2Mg + O2 - -> 2MgO 1.0 mol 0.50 mol 2.0 mol 4.0 mol

Which term best describes HCO3- A. polyatomic cation <- - I believe this is correct. B. monatomic anion C. polyatomic anion D. monatomic cation

Draw the two chair conformations of cis 1 chloro 2 methylcyclohexane

Acid is added to a beaker containing crushed marble. what effect does stirring this mixture have on the system?

Why is a molecule of CO2 nonpolar even though the bonds between the carbon atom and the oxygen atoms are polar? (1) The shape of the CO2 molecule is symmetrical. (2) The shape of the CO2 molecule is asymmetrical.

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