What is the molar mass of (NH4) 2O? Explain how you calculated this value.

Which observations would support the claim that as plants absorb sunlight to make food, they release oxygen into the environment? A. Oxygen concentration in the atmosphere was much higher millions of years ago when different plants existed B.

Determine the total mass of ethanol produced when 279. Grams of glucose rescts completely to form ethanol and 132 grams of carbon dioxide.

You have a new box of breakfast cereal that contains cereal bits and fluffy marshmallows bits. your brother shakes the box and then pours himself a bowl of marshmallows bits, leaving you with a bowl of only cereal bits.

What structures are found in all living cells

As the elements in period two are considered in succession from left to right, there is a decrease in atomic radius with increasing atomic number. This may best be explained by the fact that the

The law of conservation of energy states that momentum is conserved in a collision.

Examples of energy being used around your class room

Suppose the average concentration of copper in water is measured to be 2.5 x 10" M. a. Express this concentration in mg/L. b. Express this concentration in ug/L. c.

Which of these measurements could be the pressure of a gas? O 725K 725 mmHg 725 grams 725 meters

Propane gas (C3H8) is combusted at a constant temperature and pressure. If 34.35L of propane react, what volume of oxygen is required? What volume of carbon dioxide is produced?