calculate the mass of hydrogen in a balloon 10 meters in diameter filled with hydrogen gas at a pressure of 1atm and a temperature of 27 degrees celsius

State the formula for density in words and mathematical symbols

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3 -> a2cr(no3)3 + a3ag2so4

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.