A shopping bag for feathers is a much lighter burden then shopping bag of nails?

Why is it important to have the International System of Units?

Who was the first scientist to propose that an object could emit only certain amounts of energy? A) Planck B) Einstein C) Bohr D) Rydberg D) de Broglie

Convection is the up and down movement of what?

You have two beakers. One beaker contains 100 mL of NaOH (a strong base); the other contains 100 mL of aqueous Na3PO4 (a weak base). You test the pH of each solution. Which of the following statements is true?

If you have 3.0 moles of argon gas at STP, how much volume will the argon take up?

Martha has a large amount of 1.25 M H2SO4 in her lab. She needs 36 grams of H2SO4 for a chemical reaction she wants to perform. How many liters of solution should she use?

A student makes observations when water is added to a blue solution of copper sulfate. The student makes only 1 observation: the solution changes to a lighter shade of blue. Is this an example of a chemical reaction? Explain your reasoning.

When dos the spring tide occur

As ice transforms into steam, Question options: new molecules are formed. the types of atoms are changed. energy is absorbed by the molecules. the mass of the molecules is increased.

Why do chemists consider the periodic table so useful?