An atom of the element iron has an atomic number of 26 and an atomic weight of 56. if it is neutral, how many protons, neutrons, and electrons does it have?

The balanced equation for the combustion of Hydrogen is: 2 H2 + O2 → 2H2O How many moles of H2O will be formed from the complete reaction of 0.750 moles of O2? 0.375 mol 1.50 mol 2.67 mol 0.750 mol

How does population growth relate to soil loss?

A student attempted to identify an unknown compound by the method used in the experiment. She found that when she heated the sample weighing 0.4862g, the mass barely changed, dropping to 0.4855g.

What is concentrated salt solution added to the tube with the cheek cells?

Which of the following is a characteristic of nonmetals? a. nonmetals are often shiny and hard. b. nonmetals are often malleable. c. Nonmetals do not conduct electricity. d. nonmetals are often ductile.

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.