Which of the following are responses are not true when considering the representative elements A. They are also called Main Group elements
B. They contain the s and p block
C. You can predict valence electrons by looking at the roman numeral for each group
D. A large number of them are synthetic

Phosphorous acid, h3po3(aq) , is a diprotic oxyacid that is an important compound in industry and agriculture. the values of phosphorous acid are 1.30 6.70 calculate the ph for each of the given points in the titration of 50.0 ml of 1.5 m h3po3(aq) with 1.5 m koh(aq) .

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

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