# Hi guys, so we recently did a lab where we put a strip of Magnesium Carbonate in a crucible with a lid on, weighed it and then put it over a bunsen burner for a while to let it oxidise

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### Coordinated Sciences (chem)

Hi guys, so we recently did a lab where we put a strip of Magnesium Carbonate in a crucible with a lid on, weighed it and then put it over a bunsen burner for a while to let it oxidise. After that, we weighed it again. Here are my results: Crucible + Lid =34.07g Crucible + Lid...

### chemistry

mass of dry crucible=34.69g mass of crucible with magnesium=34.68g mass of crucible with magnesium oxide =34.97g we did a lab and igot the mass for magnesium to be 0.17g and the mass for magnesium oxide to be 0.28g. how can i find the moles of magnesium and the number of ...

### Chemistry Lab

In chemistry we are doing a lab that involves crucibles and Mg ribbon, we have three days to complete the lab. Anyways do you think it would be alright to substitute the mass of the crucible we had the first day with the mass of the crucible we had today? We know how much the ...

### college general chemistry

calculate the lowest whole number ratio of Moles of Mg/moles of O average of Moles of Mg/Moles of O Trial 1 mass of empty crucible and lid= 36.560 mass of Mg=0.348 mass of crucible, lid, and product=38.229 Trail 2 mass of empty crucible and lid=32.221 mass of Mg=0.340 mass of ...

### General Chemistry

The burning of the magnesium becomes uncontrolled (its burns brightly). Oops! How will this procedural error affect the reported mole ratio of magnesium to oxygen in the analysis? Explain. Mass of crucible and lid 23.96g Mass of Sample (Mg) .1018g Heating the sample in Air (if...

### Chemistry

What percent by mass does the water constitute in Na2SO4*10H2O? Determine the formula for the hydrate of cobalt (II) acetate from the following data. Mass of crucible and lid= 28.945g Mass of crucible, lid, and hydrate= 29.986g Mass of crucuble, lid, and anhydrous salt= 29....

### Chemistry

Calcium carbonate is insoluble in water. Name two substances that when mixed in solution, will form a precipitate of calcium carbonate. Explain why is it the two substances that you have chosen.  why does magnesium chloride cannot be prepared in the lab by the reaction of ...

write the formulas for the following compounds Sodium chlorate i put NaCl Lead (II) phosphate i put Pb2P For Magnesium hydrogen carbonate i had no clue! then it stats state the number of electrons lost or gained in forming each of these Ions. I didn't understand the question ...

### more chemistry help and proofread

write the formulas for the following potassium sulfide i put KaS Tin (IV) chloride i put SnCl4 Dihydrogen sulfide i put H2S Calcium Oxide i put CaO Hydrobromic acid i put HBr Aluminum Fluoride i put AlF3 dinotrogen pentoxide i put N2O5 Iron (III) carbonate i put Fe2(CO3)3

### college general chemistry

calculate the lowest whole number ratio of Moles of Mg/moles of O mass of empty crucible and lid= 36.560 mass of Mg=0.348 mass of crucible, lid, and product=38.229

### chemistry

How will the relative number of moles of Mg and O be affected if the following procedural errors are made? Briefly explain (1) the crubile is not brought to constatn mass before the Mg is added. (2) water is not added after the first heating of Mg, and the entire solid in the ...

### chem

empty cruble-34.69g crucible+ magnesium- 34.86g crucible+magnesium oxide - 34.97g How can i find the number of moles of magnesium present at the start of the reaction How can i also find the total number of magnesium oxide molecules present at the end of the reaction

### Chemistry

a 6 g sample of magnesium was burned in a crucible producing 10 g of magnesium oxide. What mass of oxygen reacted with magnesium to form the 10 g of magnesium oxide?

My daughter has an in put out put rule chart in put put 1out put 4,input6 output7 and so on what do they want her to do?

wrote the names for the following compounds Li3N i puit Lithium Nitride FeS i put ion Sulfide KCI i put Potassium Chloride CoSO4 i put Cobalt Sulfide SrBr2 i put Strotium bromide NCI3 i put Nitrogen trichloride Ga2O3 i put Galium Trioxide and H3PO3 i put Phosporus acid

### chemistry SERIOUS HELP N PROOFREADING

ok it says give the formula for this one Hydronitric acid, I put H3N For Iron (III) chloride I put Fe3Cl Silver acetrate i put AG1C2 Ca(OH02 i put calcium oxide for CCL4 I had no clue Mercury (II) oxide i put HG2O NaClO3 I put Sodium chlorate for (NH4)2SO4 i put hydronitrate ...

### chemistry

A sample being given as a laboratory unknown is a mixture of calcium carbonate and magnesium carbonate. Both substances decompose to form calcium oxide and magnesium oxide, respectively, when heated at a high temperature for a prolonged period. An unknown sample weighing 5.424...

### chemistry

The molar mass of magnesium carbonate, MgCO3, is 84 g/mole. How many moles are in 12.60 g of magnesium carbonate?

### Chemistry

A student dried a wet crucible with a kimwipe. A piece of kimwipe was left clinging to the inside wall of the crucible. The student did not see the piece of kimwipe when adding the NaHCO3-KCl mixture to the crucible. The crucible and its contents were weighed and subjected to ...

### Science

Alice and Marge are studying the properties of matter. The girls cut some silver-colored magnesium sheets into 3-inch long strips and then put one strip each into test tubes: one containing water and one containing acid. Nothing happened when they added the magnesium to the ...

### Chem Dr. Bob Plz

Dr. Bob, I just did a home lab with citric acid and sodium bicarbonate and had to put them in cups and measure before and after.. I put 1.02g of sodium bicarbonate in a cup with water and stirrer (54.66g) then added .77g of citric acid and supposed to add up total mass (56.45g...

### AP Chemistry

A 23.9475 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 18.345 g. Assuming ...

### AP Chemistry

A 21.0054 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g) . After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 19.0732 g. ...

### AP chemistry

A 22.709 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 15.3018 g. Assuming...

### AP Chemistry

A 28.4858 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s)→MgO(s) + CO2(g).After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 17.3014 g. Assuming ...

### Chemistry

A 28.4378 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 17.6846 g. ...

### chemistry

A 21.8603 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 18.7358 g. ...

### AP Chemistry i need help!

A 21.5997 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 15.5207 g. ...

### Science-Chemistry

In the following test for Sulfated Ash, ammonium carbonate solution was added. What is the purpose of adding ammonium carbonate solution? Heat a silica crucible to redness for 30 minutes, allow to cool in a desiccator and weigh. Place 1g of the substance in the crucible and ...

### Chem Lab

I did a chem lab and have to figure out some stuff off of some data I found during the lab Weight of empty crucible and cover: 19.74 g Weight of crucible, cover and hydrated salt: 22.74 g Weight of crucible, cover and hydrated salt after 1st heating: 22.13 g Weight of crucible...

### Chem Lab

I did a chem lab and have to figure out some stuff off of some data I found during the lab Weight of empty crucible and cover: 19.74 g Weight of crucible, cover and hydrated salt: 22.74 g Weight of crucible, cover and hydrated salt after 1st heating: 22.13 g Weight of crucible...

### Chemistry

An unknown hydrate of copper (II) oxalate is to be identified in the lab. The following data was collected by a student: Mass of crucible 23.776 g Mass of crucible + hydrate 24.889 g Mass of crucible + anhydrate 24.530 g Thank you

### chemistry

A student dried a wet crucible with a Kimwipe. A piece of Kimwipe was left clinging to the inside wall of the crucible, The student did not see the piece of Kimwipe when adding the NaHCO3-KCl mixture to the crucible. The crucible ans its contents were weighed and subjected to ...

### chem

If 0.752 g of pure sodium carbonate was dissolved in water and the solution titrated with 25.90 mL of hydrochloric acid to a methyl orange end point, calculate the molarity of the hydrochloric acid solution. (Hint: This process takes the carbonate ion to carbon dioxide.) Do I ...

### Chemistry

Instead of a strip of pure Mg ribbon, you are accidentally given a strip of an aluminum-magnesium alloy. You calculate the mass of the strip as above. Would the mass of the strip be higher or lower than expected? Write the appropriate chemical equations (one equation for the ...

### English

Could you check these few sentences n travelling. Thank you 1) Go to the check-in desk. Put your luggage on the conveyor belt for it to be weighed. 2) Once you get your boarding card, go through security. Put any metal thing in a basket for it to be scanned. Collect your ...

### college chem

Mg and O lab how will the relative number of moles of mg and o be affected if the following procedural errors are made? a)crucible is not brought to constant mass before the Mg is added. b)water is not added after the first heating of Mg, and the entire solid in the crucible ...

### college chemistry

Mg and O lab how will the relative number of moles of mg and o be affected if the following procedural errors are made? a)crucible is not brought to constant mass before the Mg is added. b)water is not added after the first heating of Mg, and the entire solid in the crucible ...

### science

I need to find a thin layer of ice that has condensed? go north :-) or... Put 1/3 cup of hot water in the freezer with a piece of plastic over it. The warm moist air will rise and condense on the plastic lid and freeze there.

### English

Can you check these sentences for me, please? Thank you. 1) I had a terrible pain in my tooth. I went to the dentist and he told me my molar was decayed (or I had a decayed tooth and it needed filling?) 2) The filling has come out of my tooth. 3) You use a rolling pin to roll ...

### chemistry

When aqueous solutions of potassium carbonate and magnesium nitrate are combined, solid magnesium carbonate and a solution of potassium nitrate are formed. The net ionic equation for this reaction is:

### chemistry

A crucible containing potassium chlorate has a mass is 24.426 g. The crucible is heated according to the lab procedure for this week's experiment and is found to weigh 23.642 g. Write an equation for the reaction and, assuming that all the chlorate decomposed, calculate the ...

### chemistry

A crucible containing potassium chlorate has a mass is 24.426 g. The crucible is heated according to the lab procedure for this week's experiment and is found to weigh 23.202 g. Write an equation for the reaction and, assuming that all the chlorate decomposed, calculate the ...

### Chemistry

the mass of the crucible is 19.73 g fill the crucible with CuSO4 which was 26.44 g Heat the crucible until the water is released it weighed 23.40 g So now, how many moles of water is removed? The number of moles of CuSO4 that after dissolution rest? determine the number of H2O...

### Chemistry

I know how to find a and b on this problem but how do I find c? Really would appreciate the help, thanks! The formula of a compound of iron and sulfur was determined using the method of mass measurements. A sample of iron was weighed into a crucible and covered with finely ...

### Chemistry

Given a 10.0g sample of MgCO3*5H2O, what weight of anhydrous magnesium carbonate can be obtained after driving off the water? The GFM of the sample is 174.3amu. Now.. how do I go about finding the weight of the magnesium carbonate?

### Sentence Editing

For example, a female may make her eyes appear rounder by completely outlining her eye to both corners, more oval by lining the top lid thicker in the middle, or larger by finely lining the bases of both the upper and lower lashes. I want to put "than before" in there ...

### Chemisty

The compound potassium carbonate is a strong electrolyte. Write the reaction when potassium carbonate is put into water

### chemistry

thanks for any help with these translations into scientific notation: 1. magnesium ribbion is dropped into an aqueous solution of hydrochloric acid 2. a solid peice of copper is burned in pure oxygen 3. zinc carbonate is strongly heated in a crucible 4. calcium chloride is ...

### Chem 2

If we burn a strip of magnesium in air, there will be two main products, magnesium oxide and magnesium nitride. If we then treat that mixture with water, the nitride ion is converted to ammonia. After boiling away the water and ammonia, we would be left with only magnesium ...

### chemistry 11

Hi, I am stuck on a couple questions in chemistry 11. The questions are 1. Calculate the number of moles of the anhydrous salt left behind 2. Calculate the number of moles of water removed by heat from your sample of hydrate. 3. Calculate the moles of water per mole of ...

### College Chem

A 2.446-g sample thought to contain only one volatile substance, MgCO3, was heated in a nitrogen atmosphere for 30 min. After cooling, the residue weighed 2.216 g. Calculate the percentage of magnesium carbonate in the sample.

### CHM Lab

How much titrant will be required if your EDTA titrant is exactly 0.01 M and you weighed out exactly 0.4 g calcium carbonate?

### Chemistry Lab

We did a lab where we reacted antacid with HCL and measured the pressure increase after the reaction. Then we found the percent concentrations of calcium carbonate of the antacid tablet. The question is: say the percent of calcium carbonate from trials 1 & 2 are consistent ...

### For DrBob

Methods and Materials: The starting materials for this lab were: a crucible, breakfast cereal (Kix), bun cent burner, 100 mL beaker, hot plate, 100 mL volumetric flask and stopper, a funnel and filter paper. First off by taking the breakfast cereal crushed up and placing it ...

### English

Which sentence shows correct capitalization and use of end marks inside parentheses? I put your guitar (The dog keeps knocking it over) back in your room. I put your guitar (The dog keeps knocking it over.) back in your room. I put your guitar (the dog keeps knocking it over...

### Chemistry Lab MgO

If in Part B.2, the burning of the magnesium is uncontrolled (burns brightly), how will this procedural error affect the reported mass of: a Magnesium in the magnesium oxide? Explain. B. oxygen in the magnesium oxide? Explain.

### English

1. Put the vegetable mix on the gas stove. 2. Put the vegetable mix over the gas stove. 3. Put the vegetable mix on the gas range. 4. Put the vegetable mix over the gas range. (Which ones are grammatical? Which preposition do I have to use?)

### MATH

oN A SPECIAL SCALE IN THR SCIENCE LAB, SCOYTT WEIGHED SAMPLES OF DIFFERENT KINDS OF SOIL. SAMPLE A WEIGHED 3 OUNCES. SAMPLE B WEIGHED 814 THOUSANDTHS OF AN OUNCE MORE THAN SAMPLE A. WHAT DECIMAL SHOULD SCOTT USE TO RECORD THE WEIGHT OF SAMPLE B?

### Chemistry

pH Strip b = 10. Strip D = 3 what would happen if you mixed togather equal amounts of the solutions that produced the results of strip b and strip d?

### math

on a special scale in the science lab Scott weighed samples of different soils. Sample A weighed 3 ounces. Sample B weighed 814 thousandth of an ounce more than sample A. What decimal should Scott use to record the weight for sample B

### chemistry

Between magnesium carbonate and calcium carbonate, which one is more thermally stable? Explain your answer.

### chemistry

Between magnesium carbonate and calcium carbonate, which one is more thermally stable? Explain your answer.

### Math

Maize counted her dime.when she put them in groups of 4 ,she had two dimes left over.when she put them in group of 5,she had one left over.what is the smallest number of dimes she could have.if she has more than 10?

### math

on a special scale in the science lab, scott weighed samples of different kind of soil.sample A weighed 3 ounces. sample B weighed 814 thousandths of an ounce more than sample A. what decimal should scott use to record the weight of sample B.

### Stiochiometry

Equation 2Mg+O2= 2MgO Lab data: Magnesium ribbon= .04 grams Magnesium Oxide= .09 2. Using the initial mass of magnesium, calculate the moles of oxygen and then moles of magnesium oxide produced. What is the mole ratio of the reactants? 3. Calculate the mass of magnesium oxide ...

### CHEMISTRY

is this right? 5. After heating the crucible is set on the lab bench where it is contaminated with the cleaning oil used to clean the lab bench but before its mass is measured. The analysis continues where the mass of the anhydrous salt is determined. While heating, the ...

### chemistry

To create a 0.1 M carbonate buffer pH = 10.2. You choose to use a combination of HCO3- / CO32-. This buffer system has pKa = 9.9.   a) Calculate how much you need to weigh in each of the sodium salts, NaHCO3 and Na2CO3, to create 1.0 L carbonate (with total concentration of ...

### Dr.Bob

I had to take cereal crush it up and place it in a crucible and cook it tell it was black ash. Then I took that burnt ceral and placed it into a beaker with HCL and water and boiled it tell the cereal was like a liquid cause coming out of the crucible it was in a circle ...

### chemistry calculations

An ore sample with a mass of 670 kg contains 27.7% magnesium carbonate .If all of the magnesium carbonate in this ore sample is decomposed to form carbon dioxide ,describe how to determine what mass of carbon dioxide is evolved during the process.

### grammar6786

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### chemistry

How do I write the skeleton equation representing the heating o f magnesium carbonate to produce solid magnesium oxide and carbon dioxide gas?

### physics

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In a lab I did, I put slices of potatos in varying amounts of sugar concentrations and one control group which contained only water and no sugar. What is suppose to happen? My data tells me that the potato weighed heavier after a day of being submerged. Is that correct? In ...

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1. She put a blanket over the sleeping baby. 2. She put a blanket on teh sleeping baby. (Can we use both over and on? What is the difference between them?)

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Rewrite each sentence below, replacing all clichés with more creative or straightforward expressions Since we had worked like dogs for eight hours, we finally put a lid on it at 6:00 p.m.

### grammar

Rewrite each sentence below, replacing all clichés with more creative or straightforward expressions.Since we had worked like dogs for eight hours, we finally put a lid on it at 6:00 p.m.

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### chemistry

A 15.67gsample of hydrate of magnesium carbonate was carefully heated, without decomposing the carbonate to drive off water. The mass was reduce to 7.58g. What is the formula of the hydrated?

### science

A 15.67gsample of hydrate of magnesium carbonate was carefully heated, without decomposing the carbonate to drive off water. The mass was reduce to 7.58g. What is the formula of the hydrated?

Mazie counted her dimes. When she put them in groups of 4, she had 2 left over. When she put them in groups of 5, she had one left over. What is the smallest number of dimes she could have, if she has more than 10

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the following numbers are put in a machine and put out, they are in a pattern. if you put in 4.5, what will you get out. input output -15 -7 -6 -4 0 -2 3 -1 6 0 12 2

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this is a question for a lab experiment...in the lab we got 2 empty vials and were supposed "eyeball" 1.0g of NaCl into each of the vials using a vial with NaCl in it already as a sample. Then we weighed the filled vials on analytical balance and recorded weight. Then we ...

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Suppose a bimetallic strip is constructed of copper and steel strips of thickness 1.23 mm and length 22.3 mm, and the temperature of the strip is reduced by 6.30 K. Determine the radius of curvature of the cooled strip (the radius of curvature of the interface between the two ...

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How many solutions does this have: x^2 + 2x + 1 = 0 I put one. 9x^2 + 49 = 42x I put one. x^2 + 4x + 1 = 0 I put two.

### Chemistry

A .1360 g sample of a mixture of magnesium and calcium carbonates when treated with HCL evolves 32.25 cm cubed of carbon dioxed measured dry at STP. Calculate the percent of magnesium carbonate in the mixutre.

### guidance

Four-year-old Nathan refuses to put on his coat before going out to play on a chilly day. Using guidance techniques, you should say, A. "No coat, no play, period."B. "Put that coat on this instant."C. "You're putting that coat on, whether you like it or not," as you put it on ...

### guidance

Four-year-old Nathan refuses to put on his coat before going out to play on a chilly day. Using guidance techniques, you should say, A. "No coat, no play, period."B. "Put that coat on this instant."C. "You're putting that coat on, whether you like it or not," as you put it on ...

### Chemistry Lab

We did a lab where we reacted antacid with HCL and measured the pressure increase after the reaction. Then we found the percent concentrations of calcium carbonate of the antacid tablet. The question is: say the percent of calcium carbonate from trials 1 & 2 are consistent ...

### HIT 105 RESEARCH PROJECT

I don't know what to put down for the concluding section. For my introductory, I put down - The Health Insurance Portability and Accountability Act of 1996(HIPPA). The congress mandated implementation of several federal privacy protections that allows patients to have more ...

### chemistry

When hydrochloric acid is mixed with magnesium and a flame is put in the tube what causes a reaction?

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"An athlete whirls a 3.7kg shot-put in a horizontal circle with a radius of 0.90m. If the period of rotation is 0.30s, how far would the shot-put travel horizontally if it is released 1.2m above the level ground?" There were two other parts to the question that I had already ...

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### College Chemistry 104

Students are attempting to construct a battery in the laboratory that will light up a light bulb. Compare the following lists prepared by students and determine which student will not be able to successfully build a "battery" that will light up the bulb. Student 1 large beaker...

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I have to sort compounds into groups, separating them by if they are acidic, Ionic, or Covalent. Heres the list: Calcium Carbonate Sodium Hypochlorite Sodium Chloride Sodium Hydrogen Carbonate Acetic Acid Ammonium Hydroxide Silicon dioxide Magnesium Sulfate Carbon Dioxide ...

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I'm writing an essay involving analysis of a short story. I need to put in-text citations after quotes, etc. The short story was read online so there is no page number, etc. How do I cite this-I'm really confused. I looked in Purdue Online Writing Lab but that's not helping. ...