An isotope of mercury has 80 protons and 120 neutrons. What is the mass number of this isotope.

What is true of enzymes? They only speed up reactions. They speed up or slow down any reaction in a living thing. They act as catalysts, each for one specific reaction. They only slow down reactions

Describe the physical and chemical changes that take place during digestion

1999 honda accord 2.3l dx why noise clunking noise

A roast beef weighs 5.65 kilograms. how many grams does it weigh?

Cesium-137, a component of radioactive waste, has a half-life of 30.2 yr. If a sample of waste has an initial activity of 15.0 Ci due to cesium-137, how long will it take for the activity due to cesium-137 to drop to 0.250 Ci?

What alkene (s) would be produced from the dehydration of cyclopentanol?

Why would you not expect to find fossils in metamorphic and igneous rocks?

What happens when a zinc rod is immersed in a solution of magnesium sulfate

How does chemical energy relate to the atom and how can we use it?

If the EMF produced in a wire is 0.88 volts and the wire moves perpendicular to a magnetic field of strength 0.075 newtons/amp·meter at a speed of 4.20 meters/second, what is the length of the wire in the magnetic field? a. 0.27 meters b. 2.