Which sample contains a total of 9.0x10 23 atoms? 0.50 mole HCI
0.75 mole H2O
1.5 moles of Cu
1.5 moles of H2

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )

pie chart because it is in percents ( % )

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa