Which one of the following elements is most likely to form a 2 - ion?

Question 4 options:

a) selenium

b) scandium

c) silicon

d) strontium

e) iodine

What is a substance? A. A physical property of matter B. A chemical property of matter C. An element or compound that cannot be physically separated D. characteristics used to tell the difference between mixtures

A Gran plot for a potentiometric titration resulted in a slope of 5.56 x 105. Measurements were made using SCE as the reference electrode and the analyte Eo was determined to be 0.354 V.

Which of the answer choices correctly predicts the charge that would be present on a magnesium (Mg) ion, as shown in the periodic table? 2+ 1+ 1- 2-

Utilizing dimensional analysis find the number of inches in a kilometer given that 1 inch equals 2.54 cm

Define the following terms: acids, bases, oxoacids, oxoanions, and hydrates.

Initially you dissolved all, or most, of the p-aminobenzoic acid in ethanol. then you slowly added sulfuric acid. as you did this, a large amount of white solid formed. during the course of the reaction, that white solid dissolved.

How do you know if a chemical reaction has occurred?

Why must a container or system be closed for equilibrium to be established?

What is the bond angle between the hydrogen atoms in an ammonia (NH₃) molecule?

In Experiment 1, the density of pure ethanol was found to be:Question 1 options:less than 0.793 g/mL. 0.793 g/mL. 0.999 g/mL. greater than 0.999 g/mL.