J5 protons and 74 electrons

9.

As the number of neutrons in the nucleus of an atom increases, the nuclear charge of the atom

A.

decreases

B.

increases

C. remains the same

page 2

Chemistry CFA Unit 1

Explain how genes lead to the traits that an organism has.

What elements do alkaline earth metals react with

How many ml of a 14.0 m nh3 stock solution are needed to prepare 200 ml of a 4.20 m dilute nh3 solution? hints how many ml of a 14.0 m stock solution are needed to prepare 200 ml of a 4.20 m dilute solution? 0.060 ml 60.0 ml 840 ml 667 ml?

Select each process that produces an increase in the entropy of the system: check all that apply. check all that apply. cao (s) + co2 (g) → caco3 (s) hcl (g) + nh3 (g) → nh4cl (s) co2 (s) → co2 (g) 2 so2 (g) + o2 (g) → 2 so3 (g)

What name was given to noxious vapour, rising from organic matter, which pollutes the atmosphere?

Question #21TrueFalse The general name for a substance added to a reaction that affects the rate but is not consumed in the reaction is called a complex a. True b. False

what kinda energy is produced when a force causes a substance to vibrate, and the energy is transferred through the substance in a wave.

What is similar to iodine by chemical characteristics

The arrangement of electrons in the orbitals of an atom

A sample of C3H8 has 4.64 * 1024 H atoms. How many carbon atoms does the sample contain?