How are large polymers formed?

What is always true of a combustion reaction? A) water will always be one of the products B) the reaction releases a large amount of energy C) one reactant must contain hydrogen D) carbon dioxide is one of the reactants

Who used experiments and scientific tools to study matter?

Which type of galaxy has a central bar of stars instead of a rounded core? A. spiral B. irregular C. elliptical D. barred spiral

Is mass conserved when 200 g of water undergoes a physical change? Use complete sentences to support your answer by explaining how this can be demonstrated.

Why is it difficult to construct a practical calendar based on the moons cycle of phase

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda