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How to calculate the number of atoms, molecules, or ions

Student took 1.52ml of a stock CuSO4 solution, with a given concentration of 3.26mg/ml. He then added water to the solution until the total volume was 10.00ml. What was the final concentration of the CuSO4 solution after the water was added?

How many moles are in 15.0 grams of calcium? 0.374 moles 2.67 moles 601.5 moles 2.40 x 1025 moles

Which of these is most likely a characteristic of a non-radioactive daughter isotope after it is formed from the parent isotope? 1) stable electrons 2) stable nucleus 3) positively charged atom 4) negatively charged atom

3 During a flame test, a lithium salt produces a characteristic red flame. This red color is produced when electrons in excited lithium atoms (1) are lost by the atoms (2) are gained by the atoms (3) return to lower energy states within the atoms

A body was found with no evidence of rigor.

What process makes volcanic mountains?

Why is there no change in the temperature when the process of melting takes place?

Summarize the acid-base behavior of the main-group metal and nonmetal oxides in water. How does oxide acidity in water change down a group and across a period?

What is an atom?