To identify a liquid substance, a student determined its densityUsing a graduated cylinder, she measured out a 45 sample of the substance. She then measured the mass of the sample, finding that it weighed 38.5 g. She knew that the sub stance had to be either isopropyl alcohol (density 0.785g / m * L ) or toluene (density 0.866g/mL) . What are the calculated den sity and the probable identity of the substance?

(a) calculated density= 0.86 g/mL. The substance is probably toluene, density= 0.866 g/mL (b) 40.4 mL ethylene glycol (c) 1.11 x 10^3 g nickel

Explanation:

idk i’m struggling too

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.