1) list the number of protons, neutrons, and electrons in carbon-13. 2) a fictitious element x is composed of 10.0 percent of the isotope x-55, 20.0 percent of the isotope x-56, and 70.0 percent of the isotope x-57. calculate the weighted atomic mass of element x to the nearest tenth. with both questions and show all work!

Water is important for the of cells. a: size, shape, and temperature b: temperature, color, and odor c: color, odor, and size d: shape, temperature, and color

What is the mass of 8 moles of sodium atoms

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign