Find the half-life of an element, which decays at a rate of 3.411% per day?

A 4.00-gram sample of sodium chloride was added to a beaker containing 40.0 mL 0.033 M lead (II) nitrate solution. Lead (II) chloride was precipitated according to the following reaction.

A mixture of iron and sulfur can be separated by A. magnetic attraction B. distillation C. evaporation D. filtration

Which substance can not be decomposed by a chemical change? (1) ammonia (3) propanol (2) copper (4) water

what mass of methanol is produced when 280.2 g of carbon monoxide reacts with 50.5 g of hydrogen? CO (g) + 2H2 (g) - > CH3OH (l)

A sample of nitrogen in a glass bulb has a mass of 245 mg what is its mass in kilograms

Phosphorus forms a number of oxohalides, x3po, in which x may be a f, cl, or br atom. the most common of these, phosphoryl chloride, is obtained as follows:

Which statement is true about the speed of light waves in a medium? a. Depends on the temperature of the light wave b. Decreases with a decrease in density of medium c. Decreases with an increase in density of medium d.

What's a certain indicator that a molecule is polar? the molecule has a nonpolar covalent bond and the dipole is cancelled due to symmetrical arrangement of atoms the molecule has a polar covalent bond and the dipole is cancelled due to symmetrical

In the synthesis of barium carbonate from an alkali metal carbonate (M2CO3 where M is one of the alkali metals) a student generated 3.7 g of barium carbonate from 2.0 g of their alkali metal carbonate.

Give the state of matter that water is in as it moves through earths system