The temperature of a sample of helium held in a metal cylinder at 85.0 kPa is 37°C. At what temperature (in °C) would the pressure of the gas be 98 kPa?

For each of the following mixtures decide if filtering would be suitable to separate the substances. explain your answers. oil in water sugar in water sand in water chalk in water tea leaves in a cup of tea

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?