On melting of ice, there is a decrease in volume instead of increase. Why?

How do plants obtain nitrogen? They remove it from the air. They absorb it through their roots. They fix it in their leaves. They produce it in their stems.

What is the nuclear binding energy for uranium-238 in joules? Assume the following:. Mass defect = 3.2008 x 10-27 kilograms. Use E = mc2, with c = (3 x 108 m/s) 2 Select one of the options below as your answer:A. 0.28807 x 10-12 joules B. 2.

60g of vinegar was used in a chemical reaction with baking soda. The total mass of the products is 140g. what was the mass of the baking soda? A) 60g B) 80g C) 140g D) 200g

1. Describe the pH scale. (What is the lowest value? Highest value? Neutral value? Which end is acid? Which end is base?)

Which are characteristics of all bacteria

Assign the oxidation number for (NH4) 3PO4

When gold is melted and formed in a mold to make a piece of jewelry, what type of change is taking place?

Do pure substances have the same chemical and physical properties

How is matter conserved in a chemical reaction

Define Percent transmittance