Aspectrum of a distant object reveals a sequence of known absorption lines that are all shifted to shorter wavelengths. what can be concluded about the object?

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.

Need ! asap will mark 10 pts using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers

How many moles of oxygen gas are produced from the decomposition of six moles of potassium