What are the vertical columns on a periodic table called

What is the ranking order of the degree of polarity? Of HF, HCI, HBr and HI

A tank with a volume of 658 ml contains 0.074 moles of neon gas. The maximum safe pressure that the tank can withstand is 450 kPa. at what temperature will tank have that pressure?

What do dentist use to hold open your mouth?

What is FeCl3+NaOH=Fe (OH) 3+NaCl

When reaction 1) and 2) below are added together, the result is reaction 3).1) h2o (l) + hno2 (aq) ⇌ h3o + (aq) + no2 - (aq) k1 = 4.50 * 10-42) h3o + (aq) + oh - (aq) ⇌ 2 h2o (l) k2 = 1.

A student experimentally obtained the density of osmium the densest element as 22.57g/cm3 the density of osmium is reported to be 22.48 g/cm3 determine the student percent error

Great white sharks live in the waters around California and feed on seals. Changes in his ecosystem have caused the seal population to decrease. Which result is an adaptation by sharks when there are fewer seals to eat? A.

Which of the following changes occurs with the greatest increase in entropy?

A child sits on a partially filled balloon and decreases the volume by half. What happens to the pressure inside of the balloon?

Which phrases describe all the outer planets' motion? Check all that apply. no rotation fast rotation slow revolution opposite revolution north to south rotation