The 54.9-g sample of the compound X2O7 contains 33.6 g of oxygen atoms. What is the molar mass of element X?

Word Bank C Class D Domain F Family G Genus K Kingdom O Order P Phylum S Species Using the first initial of each word in the Word Bank, list the order of the levels of classification, starting with the broadest category.

If 1.30 g of dry ice (solid carbon dioxide) is placed in an empty balloon, what will be the volume of the balloon at 15.0°C and 740 torr once all of the dry ice has sublimed (i. e., converted to gaseous CO2) ?

Describe How do you make a metal object such as a nail into a magnet? What happens to make it magnetic?

Calculate the molarity of a kcl solution prepared by dissolving 0.898 moles of kcl in 250. ml of water

What causes a reaction to be spontaneous? Provide an example in your explanation.

Copper consists of two naturally occuring isotopes. their masses are 62.930 amu and 64.928 amu. calculate their abundances.

Which statement is true about inorganic compounds? A. They are not made of atoms. B. They contain carbon. C. They are not made from living things. D. They are all elements.

Which domain do you find the most interesting why

Complete the matching exercise below by choosing the correct description of each bond type in aqueous solution. 1. covalent bond 2. hydrogen bond 3. electrons shared by atoms a. electrons shared by atoms b.

One mole of calcium ions has the same number of representative particles as which of the following? one mole of calcium nuclei one mole of calcium atoms 6.02 x 1023 calcium ions All of these are correct.