How many significant figures are there in 500 and 101.00?

When a chloride solution of an element is vaporized in a flame, the color of the flame is violet. What element could be in the solution

A homogeneous mixture or solution consists of

How many more neutrons does thorium-230 have than protons? How many electrons does thorium-230 have?

Symbiosis is an interaction between two different organisms living in close physical association. The relationship between fleas and a dog is most similar to which of the following relationships?

If two covalently bonded atoms move closer than a distance of the bond length, the potential energy of the atoms:a. becomes negativeb. decreasesc. increasesd. remains constante. halves

3 x 1023 molecules of element Z have a mass of 38 g. What is the mass of 1 mole?

Which type of element has an electron configuration of 1s22s22p63s23p64s1? Question 1 options: alkali metal alkaline earth metal noble gas halogen

Litus paper turns red at pHs below 6 and blue at pHs above 8. When you dip litmus paper into a glass of cold orange juice, it turns red. When you dip it into ammonia, it turns blue. If you dip litmus paper into water, it doesn't change color.

Which one of the following will show the Tyndall Effect? a. fog b. water c. olive oil d. oxygen gas

Butter is melted in a pan. Which of the following is true about the change? Select one: a. It is a physical change that absorbs energy. b. It is a physical change that releases energy. c.