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? 

Which of the following statement(s) is/are correct?    Au is the symbol for gold  Po is the symbol for potassium C is the symbol for carbon 

Use the theoretical chemical symbol below to determine is corresponding statements are true or false.    Element Z has 710 protons.  Element Z has 405 neutrons.  Element Z has 307 electrons.   

A 36.0 g sample of an unknown metal is heated from 25oC to 35oC and 171.7 J of heat is absorbed. Use the chart below to identify the unknown metal.  

What is  coefficient of oxygen when the following equation is correctly balanced to the lowest whole number ratio?  C6H12O +O2 →CO2 +H2O 

Given the following equations:  Reaction  △H  2 A(s) + 3 B (g) ⟶ 2 C (s)  -800.0 kJ  D(s) + 2 B (g) ⟶ E (s)   -640.1 kJ  Determine the enthalpy change (in kJ) for the reaction below and whether the reaction is exothermic or endothermic.  3 E (s) + 4 A (s) ⟶ 4 C (s) + 3 D (s)   

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 Point F represents a solid phase   Point H represents a liquid phase  

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? 

Which of the following is the correct formula for the chlorite ion? 

Which of the following compounds contains an exception to the octet rule on the central atom? SO3 BF3 NO2