Which of these is an example of a chemical change?

ironing a shirt

grinding powder

melting cheese

fireworks exploding

What structural feature of cells can allows molecules to flow directly from the inside of one cell to the inside of the next 1 Chloroplasts 2cilia 3plasmids 4plasmodesmata

Which of the following has the greatest amount of thermal energy? A. 1 L water at 98 °C B. 1 L water at 70 °C C. 250 mL water at 98 °C D. 250 mL water at 70 °C

What amount of O2 reacts with 43gAl

A book is pushed and released and it slides across a table for a short distance. The book quickly comes to a stop. The book originally has kinetic energy. To what form of energy is the kinetic energy transformed?

How many milliliters of solution of 2.15 M K2SO4 must be used to make 63 mL of a solution that has a concentration of 0.188 M K2SO4?

Peter is 5 ft, 11 inches tall. Paul is 176 cm tall. Who is taller?

Which is the MOST accurate description about how the different types of feedback mechanisms work

What was one of the main benefits to the use of the icebox for cooling food?

How many moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 0.98 atm and a temperature of 373 K?

What are the building blocks