An element has two isotopes. One has a mass of 5.03 amu and an abundance of 25%, the other has a mass of 7.20 amu and an

abundance of 75%. What is the average atomic mass of the element?

How many grams of ice could be melted by using 67,000 Joules of energy?

Describe a plan for finding what kind of a change each hammered bananas undergoes. Physical or chemical?

Which of the following pairs have the same specific heat? a. 1 g of solid lead; 10 g of solid lead?

At what temperature will a fixed amount of gas with a volumeof 175L at and 760 mmHg occupy a volume of 198 L at apressure of 640 mmHg ?

H2SO4+NH3 = (NH4) 2SO4 what mass of ammonium sulfate will result from the reaction of 5.00g of NH3?

Which organelles are unique to plant cells? chloroplasts mitochondria vacuoles nuclei

An atom that has 13 protons and 15 neutrons is an isotope of the element? How can I count it?

Which element is nuclear fusion least likely to produce? hydrogen, which has an approximate mass of 1 chlorine, which has an approximate mass of 35 argon, which has an approximate mass of 39 silicon, which has an approximate mass of 28 I know the

How deep does the surface current known as the Gulf Stream go A. 3,000 meters B. 3 meters C. 300 meters

What characteristics of a planet determine the strength of its gravitational force on other objects? A. diameter of the planet and its location in space B. the number of moons that the planet has C.