The mass in a chemical reaction is found in

Find the precent composititions in (NH4) 2S

Which material needs extra energy to enable the movement of free electrons? A. Conductor B. Semiconductor C. Insulator D. Element

How do greenhouse gases in the atmosphere affect Earth's temperature?   this is for my written response

In the ideal gas law, what does n represent?

What is the half-life of an isotope if 125 g of a 500 g sample of the isotope remains after 3.0 years? a.) 3.5 years b.) 4.5 years c.) 1.5 years d.) 2.5 years

Which best describes the two ways that energy is measured A. In convection and in temperature B. In temperature and in radiation C. In radiation and in convection D. In wavelength and in temperature

What usually happens to the outer electrons of metallic atoms when they combine chemically with nonmetallic atoms?

How many moles of ca atoms are in 534.0 g ca?

Select all that apply. reactions between atoms occur when: an atom seeks to fill its outer shell of electrons an atom seeks to balance its positive and negative charges the reaction will result in paired electrons

Have scientists found any reliable predictors for earthquakes, like radon gas release or weird animal behavior?