Areaction between zinc and hydroelectric acid can be slowed down by

a. cooling the acid
b. using large lumps of zinc instead of zinc powder
c. using dilute acid rather than concentrated acid
d. all of the above

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?

Use the periodic table to answer the following questions. what is the predicted order of first ionization energies from highest to lowest for beryllium, calcium, magnesium, and strontium? o be > ca > mg > sr o be > mg > ca > sr o ca > sr> be > mg o sr > ca > mg > be done

In chile, the deepest earthquake occurred at 61.7°w longitude at a depth of 540 km. if the rocks at the focus began subducting 10 million years ago and are now 1000 km from their original position, what is the average rate of subduction in cm/yr?