When a covalent or an ionic bond is formed a chemical change has

How much heat is needed warm 65.34 g of water from 18.43 to 21.75

How do I balance this equation? Fe2O3 + C → Fe + CO2

A square painting has a length of 62 cm. What is the area of the painting? cm²

Under identical conditions of temperature, number of moles, and pressure, which of the following gases has the highest density: Ne, CO2, or Cl2?

The bonding of two atoms will most likely occur if: A.) a more stable state can result from the union B.) the outer shell can be completely filled C.) all the valance electrons are removed D.) the electronegativity of both atoms are similar

Which set of factors changes igneous or sedimentary rock into metamorphic rock? heat and weathering water and weathering heat and pressure water and pressure

What is the standard cell potential (E°cell) for the voltaic cell based on the reaction below? Sn2 + (aq) + 2Fe3 + (aq) → 2Fe2 + (aq) + Sn4 + (aq)

G oil of wintergreen, c8h8o3 is prepared when methanol, ch3oh, is reacted with salicylic acid, c7h6o3. what is the percent yield of a reaction in which 15.3 g of oil of wintergreen is collected after 16.

How can a neutral atom become a positively-charged particle?

Mineral oil can be used in place of mercury in manometers when small pressure changes are to be measured. What is the pressure of an oxygen sample in mm of mineral oil if its pressure is 28.5 mm Hg? (d of mineral oil = 0.88 g/mL; d of Hg = 13.