Establish the bond between atoms in the following cases. give the scheme Lewis (electronic formula), the ion-formula (or the structural formula) and the
formula of the compounds formed; say in each case the type of connection
chemistry.

A) O (Z=8) and S Z=16) to form the SO.
B) O (Z=8) and S Z=16) to form SO2
C) O (Z=8) and S Z=16) to form SO3
D) Mg (Z=12) e Cl (Z=17)

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

What was bohr’s contribution to the planetary model