interactions between substances can produce chemical or physical changes which of the following describes a chemical change

N2 + 3 h2 → 2 nh3. what is the percent yield if 45.5 grams of nh3 is produced upon reaction of 13.0 moles n2 and 29.0 moles h2?

What happens to the temperature of a thermometer near an endothermic reaction?

The mass of a 2.0 centimeter3 sample of a substance is 3.2 grams. Calculate the density of the substance. Type the correct answer in the box.

What type of isomerism is shown by alkanes

A solution's ph is a measure of what? strength or weakness acid dissociation constant hydronium ion concentration molarity percent composition

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.