If a substance changes color, what has most likely happened

Which of the following is not typically used as a food preservative? A. calcium citrate B. sodium propionate C. vitamin E D. potassium sorbate

What are four physical properties of an orange.

you see a structural formula and which the symbols for elements are connected by a long Dash you can assume that the chemical bonds in the compound are

What is the net redox reaction that occurs when Au comes into contact with acidic KMnO4? (Use the lowest possible coefficients. Omit states-of-matter from your answer.)

Which two celestial bodies orbit the Sun? comets and asteroids asteroids and meteors meteors and asteroids 2.

Iron metal has a specific heat of 0.449J/g°C. How much heat is transferred to a 5.00 a piece of iron, initially at 20.0°C, when it is placed in a beaker of boiling water at 1 atm? Use Q = mcAt formula For chemistry

Which type of change occurs when the electrons of two atoms interact to form an atomic bond?

Which of the following is considered electronically perfect? a) Potassium b) Magnesium c) Argon d) Chlorine

The area of the circular base of a can of dog food is 12.5 in. The can is 6 inches high. What is its volume?

What is the tested variable in the experiment?