The Scientific Method

1. Which is not true about the scientific method?
A. The scientific method is done by following a step-by-step procedure in an exact sequence.
B. The scientific method is a systematic way of finding a solution to a problem.
C. Observation is the first step.
D. The scientific method may be followed even outside the laboratory.

2. What is the correct order of the steps in the scientific method?
A) Ask a question, analyze results, make a hypothesis, test the hypothesis, draw conclusions, communicate results.
B) Ask a question, make a hypothesis, test hypothesis, draw conclusions, analyze results, communicate results.
C) Make a hypothesis, test the hypothesis, analyze the results, ask a question, draw conclusions, communicate results.
D) Ask
Phenolphthalein is pink and litmus is blue.
D. Phenolphthalein is pink and litmus is red.

33. Which of the following is not a property of metal?
A. Ductility
B. Malleability
C. Good conductor of heat and electricity
D. Brittleness

34. What property of metal is described as its property that allows them to be rolled, flattened and hammered into sheets without breaking?
A. Ductility
B. Malleability
C. Poor conductor of heat and electricity
D. Brittleness

35. What property of metal is described as its property that allows them to be drawn into wires?
A. Ductility
B. Malleability
C. Luster
D. Poor conductor of heat and electricity
36. What property of metal is described as its property to reflect light that strikes their surfaces, making them appear shiny?
A. Ductility
B. Malleability
C. Good conductor of heat and electricity
C. Luster

37. Which of the following contributes to the thermal and electrical conductivity of a substance?
A. The mobile particles that can carry thermal energy from one point of the material to another.
B. The immobile particles that can carry thermal energy from one point of the material to another.
C. Its physical state at room temperature.
D. None of the above

38.
39.
Identify what kind of solution is created given this information: a solution is saturated at 25g per 100 g of water.

41. If 22g of solute is dissolved in 100g of water, what kind of solution is formed?
A. Saturated
B. Supersaturated
C. Unsaturated
D. None of the above

42. If 50g of solute is dissolved in 200g of water, what kind of solution is formed?
A. Saturated
B. Supersaturated
C. Unsaturated
D. None of the above 43. If 31g of solute is dissolved in 100g of water, what kind of solution is formed?
A. Saturated
B. Supersaturated
C. Unsaturated
D. None of the above

44. A solution can hold 15 grams per 100g of H2O. If 35 grams of the solute is added to 200g of H2O. How much H2O must be added to make it saturated?
A. 20g of water
B. 21g of water
C. 23g of water
D.24g of water

45. A solution can hold 20 grams per 100g of H2O. If 300 g of H2O has 50 grams dissolved in it, how much more can still be dissolved?
A. 10g
B. 20g
C. 30g
D. 40g

46-48.Answer the following questions given this data: 50g of sodium chloride are added to 800g or 0.8kg of water. (Molar mass of sodium chloride: 58g/mol) (Density of water: 1kg/L)

46. What is the percent by mass of sodium chloride in the solution?
A. 6.25%
B. 7.5%
C. 8.5%
D.