The test tube that contained the calcium metal was probably the most difficult of the test tubes to clean. Why was aqueous HCl used to clean the tube?

What was the significance to India of the Persian conquest of the Indus Valley and Kashmir under Emperor Darius in the sixth century B. C. E.?

What characteristics of copper and aluminum causes them to be good conductors what is the effect of this

What is measured in mercury

What is the maximum amount in moles of P2O5 that can theoretically be made from 112 g of P4 and excess oxygen?

certain byproduct in nuclear reactors, 210Po, decays to become 206Pb. After a time period of about 276 days, only about 25% of an original sample of 210Po remains. The remainder has decayed to 206Pb. Determine the approximate half-life of 210Po.

Calculate the molar solubility of ca (io3) 2 in each solution below. the ksp of calcium iodate is7.1 * 10-7.

At normal temperature and pressure, air has a density of 0.001184 g/mL. What is the mass of air in a room that is 3.07 m by 3.00 m by 3.77 m? Answer in units of kg.

A gas made up of atoms escapes through a pinhole 0.155 times as fast as h2 gas. write the chemical formula of the gas.

Calculate the mass percent composition of lithium in Li3PO4. A) 26.75 % B) 17.98 % C) 30.72 % D) 55.27 % E) 20.82 %

What is the golden rule of lighting safety?