Avogadro's number was calculated by determining the number of atoms in

A. 12.00 g of carbon-12

B. 14.00 g of carbon-12

C. 12.00 g of oxygen

D. 14.00 g of oxygen

Which of these steps of the scientific method involves stating a relationship but not proposing an explanation for the relationship? A. scientific law B. hypothesis C. theory

If an element with the valence configuration 4s23d6 loses 2 electron (s), these electron (s) would be removed from the subshell (s). B. An element with the valence electron configuration 2s22p5 would form a monatomic ion with a charge of.

What must be added or removed to change the state of matter?

According to molecular orbital theory, all diatomic molecules with an even number of electrons will be diamagnetic. True or False?

You place a balloon in a closed chamber at standard temperature and pressure. You double the chamber temperature while leaving the pressure constant. What happens to the ballon

Describe a way that people might be able to solve each envioronmental problem listed below. coal mining can harm habitats and cause pollution.

A sample of methane gas occupies 4.50 gallons at a temperature of 80.0 F. If the pressure is held constant, what will be the volume of the gas at 100. degrees C?

Jack wants to know if it takes longer for warm water to freeze into ice cubes than cold water, so he performed the following experiment. Jack placed 50 mL of water in the refrigerator and allowed it to cool to a temperature of 4°C.

How to calculate average concentration

Suppose that you measure a pen to be 10.5 cm long. Convert this to meters.