Convert 7.8 moles of carbon tetrafluoride into grams.

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.

An object displaces 652 ml of water. the volume of the object is: 0.652 cm³ 6.52 cm³ 65.2 cm³ 652 cm³

One student said that the investigation was not valid (a fair test). write a plan for the investigation that includes improvements to the method and apparatus