Choose the isotope that would be most stable.

carbon-14

barium-56

lead-82

radon-85

The world's oceans contain approximately 7.6 x 1019 moles of water molecules. Based on this, how many water molecules are there in the world's oceans?

The molar mass of water is 17.02 g/mol.

How many neutrons are in radon?

Which elements occupy the same group in the periodic table? O A. Elements that share the same row O B. Elements that share the same inside electrons O C. Elements that share the same period O D. Elements that share the same column

Which of the following is not true regarding a properly written chemical reaction

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