Which element is a noble gas?

(1) krypton (3) antimony

(2) chlorine (4) manganese

Suppose on an average day air contains 6.5 mg of carbon monoxide per 1000 m 3 3 of air. How many milligrams of carbon monoxide are in a room measuring 10 ft x 10 ft x 10 ft? (1m = 3.28 ft). Do not use scientific notation.

what will be the amount of sugar in milligram if the size of the milk chocolate bar is reduce from 14.630g to 5.000g

What is NOT true of a scientific law?

A theory that stands the test of time and becomes the basis for a field of study is called a

At the same temperature and pressure, which state of matter has the highest density?

15.00 g of NH4HS (s) is introduced into a 500. mL flask at 25 °C, the flask is sealed, and the system is allowed to reach equilibrium. What is the partial pressure of ammonia in this flask if Kp = 0.108 at 25 °C for: NH4HS (s) ⇄ NH3 (g) + H2S (g) ?

Among elements 1-18, which element or elements have the smallest effective nuclear charge if we use the equation zeff=z-s to calculate zeff? check all that apply.

Two clear solutions are placed in separate beakers. The first solution has a pH of 4, and the pH of the second solution is unknown. If the two solutions are mixed and the resulting pH is 5, the second solution must have

Based on its location on the periodic table, which element (s) have properties similar to N? Choose all that apply. * P C O Bi

What conclusion can be drawn from the statement that an element has low electron affinity, low electronegativity, and a low ionization energy?