How many electrons would it take to equal the mass of a helium nucleus?

The electron configuration for an element in the halogen group should always end with Question 16 options: ns2np6 ns2np5 ns2np4 ns2np2?

How many moles of elemental oxygen gas (o2) must react with elemental chlorine (cl2) to produce 60.7 moles of dichlorine heptoxide?

When you add energy to matter the particles move

What is the definition of a homogeneous mixture?

Plants and animals are extremely complex structures. True or False?

What is the ideal gas constant? A. It is a constant that applies only at STP. B. It is a specific constant for a particular gas. C. It is a universal constant used for all gases. D. It is a constant that depends on the conditions.

The greenhouse effect is a result of the Sun's energy being absorbed by objects on the Earth and converted into which type of radiation? A) Radio B) Visible C) Infrared D) Ultraviolet

Which was the limiting reactant: the zinc or the hydrochloric acid? Remember that the limiting reactant is completely consumed in a reaction and no new product is formed unless more of the limiting reactant is added.

How many moles are in 4,55 X 10^23 molecules of CO2 (rounded)

In standardization of NaOH solution, a student found that 25.55cm3 of base neutralized exactly 21.35cm3 of 0.12M HCl. Find the molarity of the NaOH.