What exactly are impurities?

Why the electron configuration below is not the correct configuration for a neutral atom of phosphorus in its ground state. will mark brainliest 1s2 2s2 2p6 3s2 3p2 4s1

Some amount of water is evaporated from a 2.0 L, 0.2 M NaI solution, to from a 1.0 L solution. The molar mass of NaI is 150 g/mol. What is the final concentration of NaI solution in

Why do you believe knowing how elements and compounds react together is essential in everyday matters?

What will happen to the relative amounts of hydrogen and helium in the sun over the next few billion years? a. hydrogen will increase and helium will decrease. b. hydrogen will decrease and helium will increase. c.

What was discovered first helium or samarium?

A fluorescent light tube usually contains A. a vacuum. B. oxygen. C. mercury vapor. D. light-emitting diodes.

Detectors in the walls of four containers (A-D) count the number of collisions between gas molecules and the surfaces of the containers. The detectors count 10, 15, 20, and 30 collisions per second for containers A, B, C, and D, respectively.

Oxygen, hydrogen, and water are substances. which of these substances are elements

Water has what type (s) of properties? a. physical onlyB. chemical onlyC. physical and chemical

1. Determine which object will SINK or FLOAT in water. Block #1 (3.2 g/mL) A. Sink Block #2 (0.02 g/mL) B. Float _Block #3 (0.98 g/mL) Block #4 (1.2 g/mL) Block #5 (2.4 g/mL)