A conversion factor is a fraction that is always equal to what number

What determines the horizontal arrangement of the periodic table?

What is the new item that is formed after a chemical reaction called

Suppose you wish to separate a mixture of fine particles of gold and sand, neither of which is soluble in water. if you add liquid mercury to the mixture, the sand will float to the top of the mixture while the gold will dissolve.

A billboard that stands 30 m above the ground has a gravitational potential energy of 175000 j. What is its mass

A reaction vessel contains 10.0 g of CO and 10.0 g of O2. How many grams of CO2 could be produced according to the following reaction?

What do a Am radio, Fm radio, television and cell phones have in common. A.) they were all invented in the same year B.) they were all invented by the same scientist C.

Consider the reaction: 2 NO (g) + 5 H2 (g) → 2 NH3 (g) + 2 H2O (g) A reaction mixture initially contains 5 moles of NO and 10 moles of H2. Which set of amounts best represents the mixture after the reactants have reacted as completely as possible?

True or False: If you have 2 moles of water and 2 moles of carbon, you have the same number of molecules.

Balancing chemistry equations

How much energy, in joules, is released when 17 kilograms of granite is cooled from 45 C to 21 C?