There are two stable isotopes of bromine. Their masses are 78.9183 and 80.9163 amu. If the average atomic mass of bromine is 79.9091 amu, what is the natural abundance of the heavier isotope? percent abundance of 81Br __%

What is it called when an atom completes its outer shell of electrons (8) ?

What is the h2 h2o molar ratio?

What is the molar mass of sodium?

If more energy is released from a system, than absorbed, an ___ reaction has occurred

Chemical weathering changes quartz to clay minerals. True False

What are the red blood cells

Ionic bond form when one or more _ is transferred

The atomic number of boron is 5. what is the mass number of a boron atom with 4 neutrons?

The equation X + Y 2Z has the rate law equation shown below. Which of the following statements best describes the relationship of X on the rate of the reaction? rate = k[X]2[Y] Changing X has no effect on the reaction rate.

Myriah wants to use dimesional analysis to find out how many centimeters are in 1.4 meters