If you have 222 g of radioisotope with a half-life of 5 days, how much isotope would remain after 15 days?

b. what percentage of a radioactive isotope would remain after four half-lives?

Your experiment requires 150 mL of 7.7 M NaOH. How many grams of NaOH will you need?

If two electrons in the same atom have the same value of "l", they are If two electrons in the same atom have the same value of "l", they are in the same orbital. in the same level, but different sublevel.

You collect 44.8 L of ammonia in excess hydrogen (N=14amu, H=1amu). For the Haber process, N2+3H2â2NH3, what volume of nitrogen is consumed at STP? a. 14.9 L b. 29.9 L c. 44.8L d. 22.4 L

Write the equilibrium-constant, kp, expression for the reaction a (g) + 4b (l) 3c (g) + d (g)

How did Dalton gather evidence for the existence of atoms? A. by observing an element's atomic structure through a microscope B. by calculating the number of subatomic particles in an element C.

How does phosphorus enter the human body?

When a reaction occurs between atoms with ground state electron configuration 1s2 2s1 and 1s2 2s2 2p5 the predominant type of bond formed is

How does heat transfer takes place between any two systems?

Hydrate name of CaCl2 * 8 H2O

Calculate the heat evolved from a mixture of 14.1 l of sulfure dioxide