Exp 2

Please help me.......

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

One reactant goes into iridium, how many products come out? What did you see when you were watching the reaction occur? What evidence in the equation matches the observation? Are the products examples of atoms, elements, or compounds? What happened to the iridium catalyst during the change? The product words read “nitrogen and hydrogen gas”. The equations tells us the state of matter, too. What evidence in the equation tells us the state of matter What state of matter is the hydrazine reactant?

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.

<7 of 11 Metal Ca Fe Cu Mg A B с assroom.collegeboard.org D Observations All the calcium reacted in less than 30 seconds. There was a vigorous production of a gas. ©*** Most of the iron reacted very slowly. There was a slow production of a gas. Some of the iron never totally reacted. No visible reaction. A student puts samples of four different metals of equal mass into HCl(aq) and records observations in the table. Which of the following ranks the metals from least reactive to most reactive? Ca Fe Cu < Mg of the magnesium reacted in about three minutes. There was a moderate production of a gas. Ca < Mg < Fe < Cu 43% 10:50 Cu Fe < Mg < Ca :D Cu Ca Mg < Fe Submit : ||| f(x) H 8

Translate the following chemical equations into sentences:

The movie below shows some molecules in a tiny sample of a mixture of gases. 12345 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ||||||||||||||||||I 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. П yes no carbon nitrogen chlorine key hydrogen oxygen bromine X

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?

A. If the experiment produces 50g of products and the expected mass is 90g, the theoretical yield is 55.6%.B. A box that weighs 10g with a volume of 20cm^3, the molar mass is 0.5g/cm^3. - Statement A is correct and statement B is incorrect.- Statement A is incorrect and statement B is correct.- Both statements are correct.- Both statements are incorrect.

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…

Plz do the 4 and 5 only ... for each one write the chemical reaction in symbols... highlight the coefficients...

The boiling of water is aa. physical change because the water disappears.physical change because the gaseous water is chemically the same as the liquid.chemical change because heat is needed for the process to occur.chemical change because hydrogen and oxygen gases are formed from water.chemical and physical change. Explain your answer

Prudent practices in laboratories reduce occupational risks that chemists are exposed to. a) Fire is considered one of the biggest hazards in a laboratory and there are four classes of fire. In a scenario where only water is available, name one of the classes of fire during which water is not a suitable distinguisher. Give your reason and suggest a suitable method to put out the fire you have identified.

Butane (C4H10) plus Oxygen yields carbon dioxide plus water. b. Balance the chemical equation. 2C4H10(g) + 13O2(g)→ 8CO2(g) + 10 H2O(g) c. What type of chemical reaction is it? d. Is this a physical or a chemical reaction? Please justify your answer by providing evidence from the chemical equation.

Is this a chemical or physical change? List your reasons. Was the Law of Conservation of mass followed? Explain. Write the formulas for the reactant(s) of this reaction. Write the formulas for the product(s) for this reaction.  Write the balanced chemical equation for this reaction. Be sure to include: states, catalysts, and heat if applicable.  Thank you for helping me I'm really struggling in this class

- Compare the total mass of the reactants and the total mass of the products. - Do all of the chemical reactions given above conformed the Law of Conservation of Mass?

Can you help me please?

What are advantages and limitations of different types of modelling? (modelling with experiments, computer simulations, modelling kits and quantitative modelling)

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 15.1 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 percent error of this experiment. Hint: Write a balanced chemical reaction equation and calculate the theoretical yield of platinum first. Do not show your work in the space provided. Record only your final answer with the correct number of significant digits and the proper units. Answer: Evaluate your calculated percent error, is this an acceptable percent error? No Yes

You have a sample of soil. Soil is a heterogeneous mixture. You separate the different size components from the soil using wire sieves. You found the following components in your soil: • 28 grams of clay ● 14 grams of silt • 24 grams of sand • 8 grams of gravel • 10 grams of decayed plant material. Determine the mass percent of the different components in your soil sample. 24. Clay 25. Silt 26. Sand 27. Gravel 28. Decayed plants LIVEWORKSHEETS

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 14.4 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 percent error of this experiment.Hint: Write a balanced chemical reaction equation and calculate the theoretical yield of platinum first.Do not show your work in the space provided.Record only your final answer with the correct number of significant digits and the proper units.

What are the types of errors (and their characteristics) in a chemical analysis?

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 14.6 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 percent error of this experiment. Hint: Write a balanced chemical reaction equation and calculate the theoretical yield of platinum first. Do not show your work in the space provided. Record only your final answer with the correct number of significant digits and the proper units. Answer: Evaluate your calculated percent error, is this an acceptable percent error?

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 percent error of this experiment.Hint: Write a balanced chemical reaction equation and calculate the theoretical yield of platinum first.Record only your final answer with the correct number of significant digits and the proper units.

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 percent error of this experiment. Hint: Write a balanced chemical reaction equation and calculate the theoretical yield of platinum first. Do not show your work in the space provided. Record only your final answer with the correct number of significant digits and the proper units.

Patty followed the experimental procedure for Experiment 4 Part 1, and collected the following data.  Use this data to calculate the mass of gas produced in Patty’s reaction.    A Mass of flask 96.167 g B Mass of flask + unknown 98.108 g C Mass of graduated cylinder + HCl(aq) 37.947 g D Mass of emptied graduated cylinder 27.023 g E Mass of flask containing reaction mixture  108.549 g

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.