Which of the following gases will diffuse the fastest at room temperature?

H2

Ne

He

O2

Write the symbol for the element with 10 neutrons with a mass number of A = 19.

Why is it important to protect the ozone layer

What units are used in the periodic table for atomic mass? a. grams b. kilograms c. pounds d. amu?

There are two containers: one container with a 0.15 molar solution of compound A and another with 0.20 molar solution of compound B. What is true about these two containers? O Container A has more moles than B. Container B has more moles than A.

13. A warm air mass that is cut off from the ground is said to be 14. A swirling center of low air pressure is called a (n) 15. are high-pressure centers of dry air.

what is way to find the numbers of liters in 8 kilometers? (A.) Add 5,000 and 3, because you are adding 3 kiloliters to 5,000 liters. (B.) Multiply 8 by 3,000, because each kiloliter has 3,000 liters. (C.

How much energy must be added to 2 mol H2O (g) to cause it to decompose into H2 and 02? KJ

How many moles are there in 270.4 g sample of NaOH

Suppose a 10.0 L reaction vessel is filled with 0.86 mol of BrOCl and 0.86 mol of BrCl. What can you say about the composition of the mixture in the vessel at equilibrium?

Formula for zinc nitrate