True or false If a material has a hardness of 8, it cannot be scratched by a material with a hardness of 7.

How many moles are in 150g of Calcium?

When balancing a redox reaction, you are balancing A. the moles for the equation. B. the subscripts for each molecule. C. the charges of the particles in the reaction. D. both A and C.

What number on the periodic table determines the number of electrons lost or gained?

Which one of the following statements about orbital hybridization is incorrect? M a. The carbon atom in CH4 is sp3 hybridized. b. The carbon atom in CO2 is sp hybridized. c. The nitrogen atom in NH3 is sp2 hybridized. d.

The formation of lithium fluoride (seen here) is due to A) a stronger pull by the lithium atom on its valence electron. B) increased stability in the completion of fluorine's outer shell.

The nucleus of an atom holds 4 neutrons and 4 protons, how many electrons does it have

What types of atoms are in nh3 or ammonia how many hydrogen and how many nitrogen

A piece of wood near a fire is at 23°C. It gains 1,160 joules of heat from the fire and reaches a temperature of 42°C. The specific heat capacity of wood is 1.716 joules/gram degree Celsius. What is the mass of the piece of wood? ОА. 16 g OB.

Which of the following is a viable possibility for a liquid particle that loses energy? (select all that apply) the liquid particle may become a gas particle the liquid particle may become a solid particle the liquid particle may become a slower

What is true of the bottom layer of the ocean? Select the two correct answers. A. It has the largest plants. B. It has the lowest salinity. C. It has the greatest density. D. It has the coldest water. E. It has the most sunlight.