19. B is the chemical symbol of which element?

Boron

Boring

Balkite

Beryllium

20. Zinc (Zn) has an atomic number of 30 and an atomic mass of 65. How many neutrons does a stable atom of Zn have?

30

35

60

95

True or False: The atmosphere is the collection of gases surrounding the earth trapped by earth's gravity.

Convert 0.900 atm of pressure to its equivalent in millimeters of mercury. express the pressure numerically in millimeters of mercury.

What is speed of car traveling 180 in 3hours

If 2.06 mL of seawater contains about 0.446 moles of gold, how many atoms of gold are in that volume of seawater?

If an element has the atomic number of 117 how many protons will it have and how many electrons will it have

Which action by the British government was considered by American colonists to be a violation of their rights as Englishmen?

Calculate moles of oxygen atoms in 0.68mol of KMnO4

C2H6 (g) + O2 (g) → CO2 (g) + H2O (g) (not balanced) Determine the number of liters of CO2 formed at STP when 240.0 grams of C2H6 is burned in excess oxygen gas?

What type of change is baking a cake? Why?

The van der Waals forces of attraction between molecules always become stronger as molecular size 1) decreases, and the distance between the molecules increases 2)) increases, and the distance between the molecules decreases 3) decreases, and the