Exp 2

The movie below shows some molecules in a tiny sample of a mixture of gases. 1234 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 |||||▬▬▬▬▬▬▬▬▬| |||||▬▬▬▬▬▬▬▬▬▬▬▬|| Drag the slider to see how the molecules move. Does a chemical reaction happen during this movie? If a chemical reaction does happen, write a balanced chemical equation for it. 0 yes no carbon nitrogen chlorine key hydrogen oxygen bromine

pour it 2. Still sleepy from a late night studying, you take the milk out of the refrigerator and pour it on your lemon juice to milk to make paneer (fresh cheese). As a group, craft a chemical explanation for the fact of coagulated milk onto your cereal. The last time you saw milk coagulate like that was when you added breakfast cereal. Unfortunately, by the time you notice the funny smell you have already poured clumps lemon juice to milk to make paneer (fresh cheese). As a group, craft a chemical explanation foea added that spoiled milk coagulates.

5. A liquid cannot be separated into its components through physical means but can be decomposed through electrolysis or by applying electricity. The liquid is classified as alan a. compound c. mixture b. element d. solution 6. A pure substance A is found to change upon heating into two new pure substances B and C. Substance B, but not substance C, undergoes reaction with oxygen. Based on this information we definitely know that a. substance A is a compound and C is an element. b. Both A and B are compounds. c. B is a compound and C is an element. d. A is a compound.

Based on this. What was the percentage by mass of water in the sample?

1. Large amounts of titanium metal are refined by reacting titanium(III) chloride solution with magnesium metal. To test this refining process, a student reacts 1.53 kg of magnesium metal with excess titanium(III) chloride solution. After the reaction was complete, the student had extracted 1.62 kg of titanium metal. From this data, calculate the percent error of this experiment.Hint: Write a balanced chemical reaction equation and calculate theoretical mass first.Record only your final answer with the correct number of significant digits and the proper units.     2. Platinum is a precious metal that is used as a catalyst for many important industrial reactions. Platinum can be purified by reacting platinum(IV) bromide solution with aluminium metal. To test this purification process, a student reacted 15.0 kg of aluminium metal with excess platinum(IV) bromide solution. After the reaction was complete, the student had extracted 75.4 kg of platinum metal. From this data, calculate the…

1. A candle is placed on one pan of a balance, and an equal weight is placed on the other pan. What would happen if you lit up the candle and waited for a while? Suppose the candle was placed in a large, sealed jar that allowed it to burn for several minutes before running out of oxygen. The candle and jar are balanced by an equal weight. In this situation, what would happen if you lit up the candle and waited?

1. Explain both precision and accuracy as they pertain to chemical measurements.  2. Why would you use the method of standard addition to calibrate a measurement instead of a calibration curve?

Can you help me please?

PART III: QUESTIONS        Question 1: a ‘law’ in science is a general statement that is the conclusion of multiple observations. Formulate a law that describes what happens when a metal chloride solution is mixed with a silver chloride solution. Question 2: Formulate a law that describes what happens when a metal chloride solution is mixed with a sodium phosphate solution.                   Question 3: If an aqueous solution of titanium chloride, which is clear and purple, is mixed with a silver nitrate solution, predict what precipitate will form. Question 4: If an aqueous solution of titanium chloride, which is clear and purple, is mixed with a sodium phosphate solution, predict what precipitate will form.

Which of the following equation is both physically and mathematically correct? Select all correct answers. A. S₁² 80 = Q ₂ - Q₁ 1. B. f₁dU = U₂-U₁ c. f ₁² dM = M₁-M₂ D. | dỤ=U,−U,

A student performed the identical experiment to isolate Fe, NaCl, and SiO2 in a mixture. They performed every step correctly except they extracted with 10 mL of deionized water only once rather than the recommended four times.  a.) Will this error make the calculated mass percent of Fe, NaCl, and SiO2 accurate or inaccurate. Explain your answer. b.) Will the calculated mass percents of Fe, NaCl, and SiO2 be higher or lower than the true values? - Mass percent of Fe (HIGHER or LOWER) Must explain answer. - Mass percent of NaCl (HIGHER or LOWER) Must explain answer. - Mass percent of SiO2 (HIGHER or LOWER) Must explain answer.

Based on this. What is the theoretical percentage by mass of water in pure MgSO4•7H2O?

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Assume that vinegar is 5% acetic acid (by mass) at a density of 1.01 g mL-1.  This means that 100 mL of vinegar you would have 5.05 g of acetic acid.  Calculate the molar amounts of acetic acid and sodium bicarbonate that you will use in this experiment.

Based on this. What was the percentage error in the percentage of water in the sample, compared to pure MgSO4•7H2O?