Half life

1) Radioisotopes such as aluminum -26, which is believed to have been present in the solar system when earth was formed but can no longer be detected, are known as extinct radionuclides. The half-life for the decay of aluminum -26 is 7.20 x 10 ^5 years. How many years did it take for 99.99% of the aluminum -26 to decay? If ...continues

Binding energy per nucleon

Be7 has a nuclear mass of 7.0147 amu Be9 has a nuclear mass of 9.0100 Be10 has a nuclear mass of 10.0113 How would you determine which of the above nuclear masses has the largest binding energy per nucleon?

radioactive decay

A radioactive decay series that begins with 237/93 Np ends with formation of the stable isotope 209/83 Bi. How many alpha particle emissions and how many beta particle emissions are involved in the sequence of radioactive decay?

Naming complexes

Name the following complexes: [Rh(en)3]Cl3 cis-[Mo(CO)4Br2]

Magnetic structures in relation to properties

I know that [Ni(CN)4]2- is diamagnetic and square planar in shape. [NiCl4]2- is paramagnetic and tetrahedral in shape. Since these are two completely different complexes (I am assuming), why or what about their magnetic structures/properties is worth highlighting the differences between the two.

Gas problem dealing with volume, Pressure and Temperature

2C H10 + 21O2 --> 16 CO2 + 10H2O if 950 grams of O2 are used in the above reaction How many Liters od CO2 can be collected @ a Pressure of 700mmhg + Temperature of 47degrees C ?

chemistry

1. Nickel(11) chloride reacts with sodium phosphate to produce nickel(11) phosphate and sodium chloride. NiCl2(aq) + Na3PO4(aq) ------ Ni3(PO4)2 (s) + NaCl(aq) a. Balance the equation above b. Using the balanced equation, find out how many moles of nickel(11) chloride are required to produce 0.479 mol of nickel(1 ...continues

equation calculations

I am having trouble figuring out how many grams of CO2 would be formed from 20 grams of C6H6 in the reaction of 12CO2

EMPERICAL FORMULA

What would the emperical formula be for the molecular compound C6H9O4?

EMPERICAL FORMULA

What is the emperical formula of a compound containing 83% potassium and 17.0% oxygen?