How many chromosomes does a person with down syndrome have?

Propane (C3H8) burns in oxygen to produce carbon dioxide gas and water vapor. (a) Write a balanced equation for this reaction. Include all reaction states.

Before the use of systematic names, many compounds had common names. Give the systematic name for each of the following: (a) blue vitriol, CuSO4° 5H20; (b) slaked lime, Ca (OH) 2; (c) oil of vitriol, H2804;

How is density used to identify substances

What is a non example of sustainability

If a gas has a volume of 15l and a temperature of 125K, and the temperature is increased to 225K, what is the new volume

The factor that affects how easily an electron can be removed from an atom is the A. surrounding atoms. B. temperature of the environment. C. size of the atom. D. structure of the atom.

NaCl in roman numerals

A compound has an empirical formula of C2H6. What additional piece of evidence is needed to determine the molecular formula? a. percent composition of carbon b. mass of the sample c. relative numbers of atoms of each element d.

Educated guess about the meaning of the word atom

Which of the following symbols could represent an atom of an element