How many moles of gold atoms are in 2.8 x 10 21 atoms of gold?

How many particles are there in 1.43 g of a molecular compound with a gram molecular mass of 233 g?

How many 2p electrons are in an atom of each element?

Sadie knows that the school record for the 100-meter dash is 18 seconds. During last weekend's race, the track coach time team members with a stopwatch. He told Sadie that he thinks at least one student broke the record.

When limestone (solid) is heated, it decomposes into lime (solid) and carbon dioxide gas. This is an extremely useful industrial process of great antiquity, because powdered lime mixed with water is the basis for mortar and concrete - the lime

An experiment requires 45.6g of isopropyl alcohol as reagent. Instead of measuring the mass of a liquid on a balance you decide to determine the mass by using an equivalent volume measured in a graduated cylinder.

In which pair of elements are the chemical properties of the elements most similar?

In a play, the rising action consists of the events that lead up to the a. last line in the scene. c. external conflict. b. climax. d. internal conflict.

Solution of Na2SO4 is A) acidic B) basic C neutral

What are the elements with atomic numbers from 58 to 71 in the periodic table called?

Which of these elements elements has an electron configuration of [Kr]5s2