1. Which piece of laboratory glassware is used to make precise concentrations of solutions?

A. volumetric flask
B. beaker
C. buret
D. test tubes

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

How many grams of n2h4 will be consumed by 23 g of n2o4

What are the charges of the subatomic particles by choosing the answer from the drop down menu. protons have a (+1,0,or-1). (protons,neutrons,electrons) have a 0 charge. 3.) electrons have a (+1,0,-1)