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How many significant figures would 0.01050 g have?  

Determine the molarity of a solution when 17.21 g of the hypothetical molecule Q2X6 is dissolved in enough water to create 225.0 mL of solutions. (Use the information about the elements provided below.)

Which of the following statement(s) about phase transitions is/are correct? Freezing refers to the phase transition from solid to liquid Sublimation refers to the phase transition from solid to gas. Vaporization refers to the phase transition from liquid to gas.

How many sigma and pi bonds are in the structure below?  

A vessel containing a mixture of two gases, Gas A and Gas B, has a total pressure of 8.00 atm. If the partial pressure of gas A is 0.90 atm, what is the partial pressure of Gas B? 

A vessel containing a mixture of two gases, Gas A and Gas B, has a total pressure of 6.00 atm. If the partial pressure of gas A is 0.40 atm, what is the partial pressure of Gas B?

Consider the phase diagram below for a hypothetical substance. Determine if the following statements are true based on the diagram below   Point C represents a normal boiling point of the substance [1] Point F represents a solid phase [2]  Point H represents a liquid phase [3] 

A flask contains 35.4 mL of a 3.76 M aqueous solution of KMnO4. A student adds 300.0 mL of water to the flask. What is the concentration of KMnO4 in the flask after the addition of the water? 

A 36.1 g sample of an unknown metal is heated from 15oC to 25oC and 130 J of heat is absorbed. Use the chart below to identify the unknown metal.  

The reaction of solid silicon (Si) with gaseous oxygen can be used to produce silicon trioxide. How many grams of silicon trioxide are produced in the reaction when 4.25 g of silicon reacts with 3.75 g of oxygen gas?    2Si (s) + 3O2 (g)