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The styrafoam cup acts a  ___________________ in the enthalpy of formation reaction. And is an essential piece of equipment necessary to determine the heat of formation during the experiment.

How to calculate theoretical and percent yield. My values are: .152 g magnesium turnings, 1.10 g of bromobenze, 5 g of dry ice. mass of obtained product = .515 g

THE QUESTION IS AT THE PICTURE... 2 QUESTIONS ONLY.. AND THE GIVEN PROBLEMS IS THE ONE I TYPED............. PLEASE TYPE YOUR ANSWER PLEASE.... ATTACHED PICTURE IS MY ANSWER BUT IM NOT SURE ABOUT IT PLEASE CORRECT ME IF IM WRONGB. Surface Area1. Weigh a small iron nail to the nearest hundredths of a gram and weigh an equalamount of iron fillings.2. Place them in a separate test tubes.3. Add simultaneously 3 mL of 3N hydrochloric acid and compare the rates of reaction.

5. You will be given some samples to weigh on the electronic balance in the laboratory. Place a piece of weighing paper on the pan of the balance and push the zero (tare) button so the balance registers 0.000 g. Carefully place one of the samples on the paper and record its mass in table below. Carefully remove the sample. Repeat this procedure for the other samples. Determine the average mass and average deviation of the samples. Show all work. Record the individual masses of each item in the blanks to the left below. Sample No. 1 2 3 4 5 Mass 5.029_ 5.010 4.983 5.036 4.989 Average Mass Average Deviation Standard Deviation OD 60 OD

Kindly help me with questions 5- 9  Thank you

1. In the stone age, it took this long to cut down a tree?() 1 hour, 1 day, 1 week or 1 month?2. An Egyptian pharaoh who died in 1324 B.C. was buried with an iron head rest, bracelet, and a dagger. () King Tutankhamen, King Tutankayulatan, King tutankamin or King Tutakayun?3. motorcycle plastic hydraulic lines are made off() brated stainless steel, high carbon steel, medium carbon steel, or low carbon steel?4. This is important for products with moving parts.() Brass, platinum, Bronze or Steel5. used in the hospitals with extra chromium in it to resist the salts in body fluids.() high carbon steel, low carbon steel, stainless steel or mild steels?6. Mobile nutrients like nitrogen are found deeper into the soil profile while non-mobile nutrients like potassium and phosphorous are found at the _____ soil profile.() zero to six inches, composite sample, 24 inches, or Depth?

Question is attached

A homogeneous mixture of two or more substances is called ________   a. a mess. b. a solution. c. an electrolyte. d. a solvent. e. a compound.

What's the answer to all of these questions? with solutions...

rust on an iron nail element or compound?

Can someone Please Help! No Plagiarism Please! Evaporation is a  __________________________________. Evidence - Explanation -  Iron rusting is a __________________________________. Evidence -  Explanation-  Milk souring is a _________________________________. Evidence -  Explanation-  A tire inflated with air is an example of a ___________________________. Evidence - Explanation - A pellet of sodium (Na) sliced in two pieces is an example of a _____________________________. Evidence - Explanation -

Why small grain size metals have the temperature environment greater mechanical strength than if they had larger grains?

Please solve the question I recieved incorrect and show work!!

When you use a balance to weigh a reagent, you should weigh onto: -a filter paper. -the top of the balance. -a folded weighing paper or weighing boat.

THE QUESTION IS AT THE PICTURE... 2 QUESTIONS ONLY.. AND THE GIVEN PROBLEMS IS THE ONE I TYPED...... EXAMPLE ANSWER ON THE SECOND PICTURE... BUT  IM NOT SURE IF IT IS CORRECT.. DONT MIND MY ANSWER PLSS.B. Surface Area1. Weigh a small iron nail to the nearest hundredths of a gram and weigh an equalamount of iron fillings.2. Place them in a separate test tubes.3. Add simultaneously 3 mL of 3N hydrochloric acid and compare the rates of reaction.

Directions: Read and understand each item and choose the letter of the correct answer. You can just answer letters no need to put explaination but if u want too its okay :)) 4. The electrolysis of water into hydrogen and oxygen is an example of ______ reaction.A. Combination C. double replacementB. Decomposition D. single replacement 5. What scientific law is explained using balanced chemical equations?A. Law of chemical reactions C. law of conservation of massB. Law of conservation of energy D. law of definite proportions 6. Which of the following symbols means a substance is in water solution?A. (aq) C. (l)B. (s) D. (w) 7. When oxygen is available, sulfur dioxide is produced from the burning of sulfur. Which of the followingword equations best represents this reaction?C. A. sulfur + oxygen → sulfur dioxide C. sulfur dioxide → sulfur + oxygenD. B. sulfur dioxide + oxygen → sulfur D. sulfur → sulfur dioxide + oxygen 8. In a chemical equation, the symbol that takes the place of the word…

In this part of the copper experiment, you will use a special funnel to separate the copper oxide from the liquid. This is called a ______________ funnel. (Do not use any special characters when typing your answer, only standard alphabet letters on the keyboard).

A ______________ is the sharing of electrons between two atoms.

Procedures: 1. Place a piece of colored paper in a pan then pour a drop of bleaching agent (chlorox). Observe what happens. 2. Open the soft drinks then put the mentos inside the bottle. Observe what happens. 3. Get a piece of paper and lift it up using the matchstick. Observe. Guide Questions: 1. What happened to the colored paper? 2. What is formed in coke after putting the mentos? 3. What is formed when you lift the paper?

b Window Help earning X ATM HOMEWORK Module 9 Mind Tap - Cengage Learning X entid=5735112480241329813180832311&eISBN=9781305862883&id=1707786068&snapshotid=33225... name of the element oxidized: formula of the oxidizing agent: Submit Answer X Use the References to access important values if needed for this question. tv References Cl₂ + H3ASO4- HASO2 + 2HCIO Oxidation Number: This is group attempt 2 of 10 In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. Autosaved at 11:20 PM A name of the element reduced: + formula of the reducing agent: ☎ W a D 9 ●

What is Flame Test Experiment? Discuss. What is your observations about this flame test experiment? Discuss. What is your own conclusion about this experiment? Discuss.

titanium industry methods in details ?

ofiles Tab Window Help Bb Do - Mathematics X ATM HOMEWORK Modul X ?deploymentid=5735112480241329813180832311&eISBN=9781305862883&id=1707786068&sna APR 17 MindTap Cengage X G CIO4- + SO37 Use the References to access important values if needed for this question. name of the element oxidized: Submit Answer HXeO4 + 6NH3-3N2H4 + Xe+ 3H₂O+ OH- formula of the oxidizing agent: References ge in Oxidation Number: This is group attempt 1 of 10 tv In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. name of the element reduced: formula of the reducing agent: A ☎ W Q 9 Low Battery Your Mac will sleep soon u into a power outlet. M Q Search thi 1

Achemical reaction that has the general formula of nA (A)n is best classified as a reaction. synthesis polymerization decomposition oxidation replacement Save and Exit Next Submit Mark this and return

Please help me with this. It is Electrochemistry lesson. Pleaseee *Used to determine the elemental composition of a pure coal free from moisture and inorganic constituents. *All of these are advantages of a solid fuels, except.. a. Easy to handle and transport b. Low risk during storage. c. Cheap and widespread d. Combustion is easy to control

How can we reduce peak temperatures of the flame to reduce NOx formation?

THE QUESTION IS AT THE PICTURE... 1 QUESTIONS ONLY.. AND THE GIVEN PROBLEMS IS THE ONE I TYPEDA. Concentration1. Place 3 mL each of 6N, 3N, & 1.5N hydrochloric acid in separate test tubes.2. Drop simultaneously equal lengths (about 1cm) of magnesium ribbon and note thetime it takes for the magnesium to dissolve in each use.B. Surface Area1. Weigh a small iron nail to the nearest hundredths of a gram and weigh an equalamount of iron fillings.2. Place them in a separate test tubes.3. Add simultaneously 3 mL of 3N hydrochloric acid and compare the rates of reaction.C. Temperature1. Place 5 mL each of 0.1N sodium thiosulfate solution into 5 test tubes.2. Place all five test tubes in the water bath and let it stand for 1 minute.3. Record the temperature of the water bath. Remove the first test tube from thewater bath and place it in the test tube rack.4. Add 1 mL of 0.1M sulfuric acid and stir with a glass rod. Record the time it takes forthe turbidity to appear.5. Increase the…

The purpose of a centrifuge is to separate a sample into a  Choose...solid,warm,pure    component and a  Choose...liquid,cold,impure    component.

Chemistry  ...

VI. Flame Test Watch the following video: https://www.youtube.com/watch?v=kkBFG1mTSBk Record the color of the flame observed for each substance tested in the video. Solution Color Observed SrCl₂ NaCl KCI Solution LICI CuCl2 CaCl₂ Color Observed 1. Explain why colored flames are observed when elements are heated?

I don't know.. all of them..

Please write legibly and try to attend to all types of steel Please answer with explanation Correct answer need.