Predict the structure of heptane.

What is the morality of 2.50 l of solution that contains 1.85 mol of anhydrous sodium tetraborate?

What is the volume in liters of 7500 g of helium atoms. assume stp conditions.

Henry moseley used x-ray experiments to determine the atomic number of elements. how did his discovery contribute to the development of the periodic table? a.it confirmed that elements should be arranged in strict order of increasing atomic mass. b.it led to elements with similar atomic numbers being grouped together. c.it allowed the elements to be placed in strict order of increasing atomic number. d.it showed that the way mendeleev grouped elements together was completely wrong.