Two elements in the same chemical family can have the same spectrum.

a. True

b. False

Yogurt has an approximate pH of 5 and vinegar has an approximate pH of 3. How many times more acidic is vinegar compared to yogurt in terms of concentration?

If someone tells me that scientific knowledge cannot be changed or modified how would I answer that statement

A puddle of water on the porch disappears after a few days. Which statement justifies this phenomenon?

If you find that a substance turns litmus paper to blue and contains hydroxide ions, it is most likely

What particles are used to form bonds

Which of the following choices are types of energy? (Select all that apply) cube energy visible energy nuclear energy kinetic energy

Hanna hypothesizes that granite is denser than sandstone. How can Hanna test her hypothesis?

It is possible to determine the environment of sedimentation for various sand dunes by

Which change results in the formation of different substances? (1) burning of propane (2) melting of NaCl (s) (3) deposition of CO2 (g) (4) solidification of water

Suppose that a solid cube of some material floats on the surface of an oil puddle at a service station with 75.1 % of its volume submerged. The density of the oil is 923 kg/m 3. What is the density of the cube's material