# Ineed a rubidium isotope has a half-life of almost 50 billion years. given that scientists estimate earth's age to be 4.6 billion years, what is the most likely percentage of parent to daughter isotopes of this element currently existing on earth?

### Other questions on the subject: Chemistry

Chemistry, 22.06.2019 08:20, BaileyElizabethRay
An indoor swimming pool is 105 feet long and 65.0 m wide. calculate the mass of water (density = .9998 g/ml) needed to fill the pool if it is 10.5 m deep. (1 ml = 1 cm^3). 11. a penny contains 97.0 % of zn and 3.00% of cu. calculate the density of a penny if the respective densities of cu and zn are 8.95 g/cm^3 and 7.14 g/cm^3. a hybrid car has a gasoline mileage of about 65.0 mi/gallon. how much money will it require to drive this car from irving to el paso if the distance between the two cities is about 755 mi and the gas costs \$ 5.99/gallon? barracudas are fast moving fish which can move at about 31.0 m/s in the open sea. express this speed in mi/h. how many significant figures are there in each of the following measurement?
Chemistry, 22.06.2019 10:00, shayneseaton
The tendency of water molecules to stick together is referred to as a) adhesion b) polarity c) cohesion d) transpiration e) evaporation
Chemistry, 22.06.2019 13:30, makenziehook8
Which is true of a liquid? it has a definite volume but not a definite mass. it has a definite mass but not a definite volume. it has a definite volume but not a definite shape. it has a definite shape but not a definite volume.
Chemistry, 22.06.2019 14:30, malenacastillo4887
For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants. 4al(s)+3o2(g)→2al2o3(s) a) 1 molal, 1 mol o2 b) 4 molal, 2.6 mol o2 c) 16 molal, 13 mol o2 d) 7.4 molal, 6.5 mol o2