Two samples of helium gas are in seperate, identical 1.0-L containers Both samples are STP. Which new container would contain both samples and still maintain STP

During chemistry class, carl performed several lab tests on two white solids. the results of three tests are seen in the data table. based on this data, carl has concluded that substance b must have bonds.

Match the name of the following compound:   mgso4  · h2omagnesium sulfate monohydratemagnesium (ii) sulfate monohydratemagnesium (ii) sulfate hydratemagnesium sulfate hydrate

How are isotopes of the same chemical element alike? how are they different?