Exam 2: Atoms, molecules, and Ions

Methane and oxygen react to form carbon dioxide and water.What mass of water is formed if 6.4 g of methane reacts with 25.6 g of oxygen to produce 17.6 g of carbon dioxide?

10% saline solution (sodium chloride dissolved in water)is an example of a ________.

In which set do all elements tend to form anions in binary ionic compounds?

Sodium is an example of an ________ metal that reacts with water to form hydrogen gas and an ________ solution.

How many protons (p)and neutrons (n)are in an atom of Sr?

-If shaded and unshaded spheres represent atoms of different elements,which of the above drawings most likely represents a molecular compound at room temperature and a pressure of 1 atm?

Chlorine belongs to the ________ group of the periodic table.

What is the chemical formula for cesium bicarbonate?

-What is the chemical symbol for platinum?

What is the chemical formula for strontium hydroxide?

What is the chemical symbol for an atom that has 29 protons and 36 neutrons?

How many protons (p)and neutrons (n)are in an atom of calcium-46?

Which of the following statements is not a postulate of Dalton's atomic theory?

-Which of the above drawings represents a pure element?

Which element is most chemically similar to the element indicated by the letter E in the following periodic table?

What group of elements does the shaded area in the following periodic table indicate?

Calcium belongs to the ________ group of the periodic table.

Which of the compounds C₂H₆,CaCl₂,Cu(NO₃)₂,OF₂ are expected to exist as molecules?

The observation that 4.0 g of hydrogen reacts with 32.0 g of oxygen to form a product with O:H mass ratio = 8:1,and 6.0 g of hydrogen reacts with 48.0 g of oxygen to form the same product with O/H mass ratio = 8:1 is evidence for the law of

Boron-9 can be represented as