A student sees a change in mass in the lab when mixing two chemicals what is a possible explanation?

How many grams of water are produced when 2.50 mol oxygen reacts with hydrogen?

When a data set has an even number of elements, the median is calculated by

Identify the person who made the correct statement. Mike said petrified fossils are hard and heavy like rock. Bobby said that petrified fossils have the same appearance as when they were alive. Neither Mike nor Bobby is correct. Mike is correct.

The Transition Elements can be divided into two types. List each type.

Suppose you have 100 grams of radioactive plutonium-239 with a half-life of 24,000 years. how many grams of plutonium-239 will remain after a. 12,000 years b. 24,000 years c. 96,000 years?

What is the correct term for water Atom element product reactant

Do carbon atoms gain, lose, or share electrons?

In aqueous solution the ag ion forms a complex with two ammonia molecules. Write the formation constant expression for the equilibrium between the hydrated metal ion and the aqueous complex.

Which samples are substance? (A) HCI (aq) (B) NaCI (aq) (C) HCI (g) (D) NaCI (s)

2. If you add water to dilute a solution, what happens to the molarity of the compound in the solution? Explain