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Strontium consists of four isotopes with masses of 84 (abundance 0.50%), 86 (abundance of 9.9%), 87 (abundance of 7.0%), and 88 (abundance of 82.6%). Calculate the atomic mass of strontium.

How to tell on a periodic table if something is more reactive than something else?

Using the reagents below, list in order (by letter, no period) those necessary to prepare compound B from propene (show the addition of the CN before electrophilic addition reactions with the alkene). Note: Not all spaces provided may be needed.

Use the drop-down menus to complete each statement about eubacteria and archaebacteria. are referred to as "true bacteria." are prokaryotes. are single-celled bacteria. y are bacteria that live in extreme environments.

According to naming conventions, which class of organic compounds does methanal belong to? alcohols aldehydes carboxylic acids ketones

Why is Sn (SO4) 2 named Tin (IV) Sulfate and not Tin (II) Sulfate?

An element x forms an iodide (xi3) and a chloride (xcl3). the iodide is quantitatively converted to the chloride when it is heated in a stream of chlorine: 2xi3+3cl2â2xcl3+3i2 if 0.5500 g of xi3 is treated, 0.2596 g of xcl3 is obtained.

When you kick a soccer ball across a field it will eventually come to a stop. Does this prove or disprove Newton's first law of motion? It disproves Newton's first law of motion because gravity is stronger than friction.

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

If a new substance is formed in a chemical reaction, what atoms do they consist of?