The half life of protactinium 234 in its ground state is 6.69 h. What fraction of a given amount remains after 26.76 h

In the graph, what effect would adding a catalyst have on D? A. It would increase B. It would decrease C. It would stay the same D. You cannot tell from this graph.

A 5.95-g sample of AgNO3 is reacted with BaCl2 according to the equation to give 4.07 g of AgCl. What is the percent yield of AgCl?

A sample of argon gas has a volume of 73 mL at a pressure of 1.20 atm and a temperature of 112 degrees Celsius. What is the final volume of the gas, in mL, when the pressure and temperature of the gas sample are changed to. 55 atm and 75 degrees C.

What element is white shiny metallic solid reacts slightly to air and the density is 1.55

What are the advantages of wind power?

If an atom of Bromine (Br) becomes an ion, which of the following does it most likely form? a. Br+ b. Br7+ c. Br- d. Br7-

The language of variables

Which of the changes are physical changes

When PCl5 solidifies it forms PCl4 + cations and PCl6 - anions. According to valence bond theory, what hybrid orbitals are used by phosphorus in the PCl4 + cations?

Given that the mass of an electron is 5.486*10-4amu, and the mass of a proton is 1.007 amu, calculate how many times heavier a proton is than an electron