You purchase several rolls of fiberglass insulation and pay extra for installation. Have you purchased a product or a service?

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes? or no? this question is worth 20 points! let it be correct!

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate

Question 2 (5 points) which of the following materials is useful for making molds because it has a low melting point? question 2 options: wood metal wax sand