Which nuclides are used to date the remains of a once-living organism?

(1) C-14 and C-12 (3) I-131 and Xe-131

(2) Co-60 and Co-59 (4) U-238 and Pb-206

How many moles of atoms are contained in 15.7 g of Bromine

The heat content of a system is?

In a reversible reaction, equilibrium is reached when The concentration of the reactants and products are equal There is no product; all reactant The concentration of the reactants and products remain constant There is not reactant; all product

Which is the best hypothesis to use for this investigation?

A 15.0 L tank of gas is contained at a high pressure of 8.20x10 4 torr. The tank is opened and the gas expands into an empty chamber with a volume of 6.00x10 4 L. Calculate the new pressure of the gas.

A can of soda is 335ml what is 2 cans of soda in ml

Compound X has the molecular formula C3H6, and Compound Y has the molecular formula C6H12. How are the two compounds related? A. They are made of the same elements, but are different compounds B.

Write a generic Lewis structure for the halogens. Draw the Lewis dot structure for X

Choose the correct statement about an atomic nucleus, compared to an atom as a whole. Choose the correct statement about an atomic nucleus, compared to an atom as a whole. The nucleus is very tiny but has most of the mass.

Four waves are produced when a harp is strummed at four different times. Which wave will produce the highest pitch?