A0.200-g sample of unknown metal (X) is dropped into hydrochloric acid and releases 80.3 mL of hydrogen gas at STP. Using the Ideal Gas Law, the number of moles of the unknown ? is yielding a molar mass of?
Referring to the Periodic
Table, the name of the unknown metal is ?
and symbol ?

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

In an exothermic reaction the bonding energy of the product is: less than the reactants same as the reactants greater than the reactants dependent upon the presence of a catalyst

7. in the cycle, a virus integrates its dna into the host's dna, and its dna is replicated when the host dna is replicated. a. infectious b. retroviral c. lysogenic d.lytic