The weight on an object depends on its (blank) and the (blank) of Earth.

Fill in the blanks

Note: both blanks are only one word

Where does the energy come from that is needed for an endothermic reaction

Which aspect is similar in both chemical and nuclear reactions? A. Both involve nuclear fusion. B. Both involve nuclear fission. C. Both may release heat and light. D. Both involve the exchange of electrons.

A hydrocarbon of pentane has two isomeric forms-n-pentane and iso-pentane. The molecular formula of the n-pentane is C5H12. Predict the molecular formula of the iso-pentane.

Archimedes, a greek mathematician and inventor of the second century b. c., was commissioned by the king of syracuse to find out whether a crown that had been made for the king was fashioned from pure gold or from a mixture of gold and silver, a

Propionoic acid, C3H6O2, reacting with methanol, CH4O, will produce C4H8O2 and water. If 70.0 g of propionoic acid and 60.0 g of methanol are reacted together, which one will be the limiting reactant? C3H6O2 + CH4O → C4H8O2 + H2O

N aqueous solution of sodium hydroxide is standardized by titration with a 0.154 m solution of hydrochloric acid. if 17.5 ml of base are required to neutralize 17.6 ml of the acid, what is the molarity of the sodium hydroxide solution?

How large a volume is need to contain 21 grams of silver? (info: density of silver is 10.5)

How could Cl change to gain stability? lose 7 electrons gain one electron

Connie was making sodium chloride by adding an acid to an alkali. She followed the progress of the reaction with a pH sensor. At which pH would she know that the acid and alkali had completely reacted to give a salt solution?

Yttrium - 90 has a half life of 64 hours. How much of a 120g sample will remain after 128 hours?