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Calculate the molality of a solution in which 39.02 g of FeCl3 (molar mass = 162.2 g mol-1) are dissolved in 1335 g of water.

Question 5.5   Sometimes the DNA blueprint code becomes a bit mixed up or damaged. These tiny changes in the plan can result in living things changing. The green moth changed to a darker coloured one.   Click on the button below to open the picture of the moth.   Explain how this can be problem and an advantage. (4)

5. You should always assume the burglar has left the scene of the crime prior to your arrival.a. Trueb. False

What is the difference between regular covalent bonds and coordinate covalent bonds?

Given the equilibrium reaction below, predict how each change would shift the equilibrium?

Question 1.3.2   A student wants to make the buzzer in this circuit louder. They can not change the buzzer, but they can add or remove component. Give one change the student could make to the circuit to make the buzzer louder. (1)

Suppose you calculated a value for ΔHvap for water that was 3% above the accepted value, which of the following is the most likely reason for the difference?

What explains the phenomenon that a 10.0 m NaCl(aq) does not have twice the effect of 10.0 m sucrose(aq) on lowering the freezing point of water, while a 0.0100 m NaCl(aq) does have twice the effect of a 0.0100 m sucrose(aq) solution on lowering the freezing point of water.

Indicate what kind of solution you will have upon adding each of the salts below to their own separate vials of pure water. NaCH3COO: [solution1] NaOH: [solution2] NaCl: [solution3] HCl: [solution4] NH4Cl: [solution5] KNO3: [solution6]

Question 1.3.1   The picture below shows an electrical circuit. This electrical circuit consists of a buzzer and a switch.   Draw a diagram of the circuit by using the correct symbols.   Click on the button below to open the picture of the electrical circuit.   Upload Image Here (3)