# How many litters of Oxygen will be required to burn 3.8 liters of propane, C3H8?

16,365 results, page 91
1. ## Physics

The Sun puts out 3.9 x 10^26 J of energy per second. Assuming 100% conversion to energy, how much mass is required to create this energy

asked by Joy on April 21, 2008
2. ## Chem

21.7 mL of 1.15 M KOH (aq) was required to titrate 25 mL of H2SO4 (aq) as follows: H2SO4 (aq) + 2KOH (aq) --arrow-- K2SO4 (aq) + 2H2) (l) What is the molarity of the H2SO4 (aq)?

asked by Sarah on February 13, 2017
3. ## chemistry

How many grams of steam at 100 Celsius would be required to raise the temp. of 35.8 g solid benzene, from 5.5 Celsius to 45.0 Celsius???

asked by pgarcia on February 24, 2010
4. ## Health care tech

Which of the following are required by networks? A network card A network router Network cables Hardware and software All of these B and C but im assuming all of these

asked by Anonymous on October 21, 2016
5. ## PHYSICS

A force of 0.65 N is required to hold a spring extended 5.3 cm from its equilibrium position. Calculate the spring of constant of spring?

asked by Carmen on November 14, 2016
6. ## physics

Given that the mass of an electron is 9.1 x 10^-28 grams and the charge on an electron is 1.6 x 10^-19 Coulombs, calculate the voltage required to lift an electron 5 cm. not quite sure how to do this.

asked by Martin on May 19, 2012
7. ## chemistry

calculate the volume of mL of a 1.420 M NaOH solution required to titrate the following solution. 25.00 mL of a 1.500 M H3PO4 solution

asked by TROUBLED on October 11, 2011
8. ## Skill!

can u give me lists of skills required in busnisses! i got communication skills, teamwork skills, and i happen to need atleast 3 more...

asked by Thara! on February 28, 2010
9. ## Calculus

Breathing is cyclic and a full respiratory cycle from the beginning of inhalation to the end of exhalation takes about 5 seconds. The maximum rate of air flow into the lungs is about 0.5 L/s. This explains, in part, why the function

asked by Elizabeth on April 27, 2012
10. ## Science

what is the required amount of con hcl needed to prepare 100ml of w/v dilute Hcl? strenth of Hcl 36.5 w/w and is specific gravity is 1.17

asked by M hari Dhas on October 26, 2015
11. ## Geometry

A rectanglar school yard is 280 meters by 245 meters is to be fenced. How many meters of fencing will be required to fence it completely?

asked by wayne on February 13, 2013
12. ## Finance 370

\$1,000 face value bond has a remaining maturity of 10 years and a required return of 9%. The bond’s coupon rate is 7.4%. What is the fair value of this bond?

asked by Anonymous on September 10, 2012
13. ## Physics

A stone is thrown straight up with a velocity of 24.0m/s from a height of 2.00m. How fast is it moving when it is at a height of 13.0m? How much time is required to reach this height?

asked by Maura on June 18, 2016
14. ## Corporate finance

A 1,000 face value bond has a remaining maturity of 8 years and a required return of 7%. The bond's coupon rate is 8%. What is the fair value of bond?

asked by lynn on July 14, 2011
15. ## Physics

A stone is dropped from an airplane at a height of 490 m. The stone required 10 s to reach the ground at what rate does gravity accelerate the stone?

asked by Neenee on September 17, 2013
16. ## finance

A \$1,000 fave value bond has a remaining maturity of 10 years and a required return of 9%. The bond's coupon rate is 7.4%. What is the fair value of this bond?

asked by angek on March 24, 2012
17. ## Finance

I need some help with an assignment that I am working on for Introduction to Finance class. Here is the questions: The Landis Corporation had 2008 sales of \$100 million. The balance sheet items that vary directly with sales and the profit margin are as

asked by TinkRose on November 21, 2009
18. ## chemistry

1.)Calculate the number of moles in 3.50 x 10^21 atoms of silver. Show all work. 2.) Calculate the number of atoms in 2.58 mol antimony. Show all work 3.) Determine the mass of 1.45 mol FePO4. Show all work. 4.) Calculate the number of mol in 6.75 g of

asked by Raina on February 9, 2014
19. ## ap chem

an unknown gaseous hydrocarbon reacts with oxygen to form CO2 and H2O, DETERMINE HEAT OF FORMATION FOR THE HYDROCARBON. the density of the mixture of CO2 and H2O at 1 atm and 200 degree celsius is 0.751g /L and heat of reaction is equal to -2044.5 KJ /MOL

asked by Rita on October 11, 2014
20. ## chem

Consider the following chemical equilibrium: SO3(g) --> SO2(g) + 1/2 O2(g) and Delta H = 98.9J i. adding oxygen gas ii. compressing the system at constant temperature iii. adding argon gas iv. removing sulfur dioxide gas v. decreasing the temperature Which

asked by Anonymous on March 9, 2008
21. ## Chemistry

A researcher studying the nutritional value of a new candy places a 4.90 gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.75 Celsius. If the heat capacity of the calorimeter is

asked by Carey on February 10, 2012
22. ## chemistry

Subject – equilibria Pure ethanoic acid (25.0cm3, CH3COOH), pure ethanol (35.0 cm3, C2H5OH) and pure water (20.0cm3, H2O) were mixed in a sealed flask at room temperature. The flask was placed in a heated water bath and maintained at 323K until

asked by yaya on May 7, 2012
23. ## chemistry

(You may have seen this before) A crude oil burned in electrical generating plants contains about 1.2% sulfur by mass. When the oil burns, the sulfur forms sulfur dioxide gas: S(s) + O2(g) -------> SO2(g) How many liters of SO2 (d = 2.60 g/L) are produced

asked by starlight on October 11, 2008
24. ## Biology/Chem

Soy sauce is prepared by fermenting a salted mixture of soybeans and wheat with several microorganisms including yeast over a period of 8-10 months. After the solids are removed, the resulting sauce is rich in lactic acid and ethanol. How aere these 2

asked by Drew on October 19, 2013
25. ## chemistry

what is the molarity of a solution of KNO3(molecular mass=101) that contains 404 grams of KNO3 in 2.00 liters of solution? A. 1.00M b. 2.00M c. 0.500M d. 4.00M The definition of molarity is #mols/Liter of solution. Convert 404 g KNO3 to mols (mols =

asked by Kat on March 26, 2007
26. ## biology

One in every 685 children born in the chicoutimi area of quebec province has tyrosinemia. It is cause by having two copies of the receissive allele. Under the assumptions of Hardy-Weinberg equilibrium, calculate the value of q required to produce this

asked by Fred on September 11, 2012
27. ## phys3

A biologist is studying growth in space. He wants to simulate Earth's gravitational field, so he positions the plants on a rotating platform in the spaceship. The distance of each plant from the central axis of rotation is r = 0.11 m. What angular speed is

asked by opp on February 20, 2012
28. ## Chem 100L

Calculate the molarity of an aqueous NaOH solution if 32.00ml of it is required to titrate .6789g of oxalic acid to a phenophthalein end-point. the balanced chemical equation is H2C2O4 + 2NaOH ---> Na2C2O4 + 2H2O

asked by Tammytha on December 2, 2012
29. ## statistics

You are designing a study to determine whether music has an effect on learning. Previous research indicates that the standard deviation to learn a task is 3.4 minutes. How many subjects would you need to ensure with 90% confidence that the estimate is

asked by tammy on April 29, 2012
30. ## Chemistry

Calculate the molarity of an aqueous NaOH soultion if 32.00ml of it is required to titrate. 0.6789 g of oxalic acid to phenolphthalein end point. The balanced chemical equation is H2C2O4 + 2NaOH-> Na2C2O4 + 2H2O

asked by Sonya on December 6, 2010
31. ## PE

Your doctor tells you that you and your twin sister have the same basal metabolic rate (BMR). You live independent lives and do your own thing, so how can that be? Which factor is likely the reason? 1. your age 2. your appetites 3.(your required Daily

asked by Help I need somebody not just anybody on January 18, 2017
32. ## Accounting

I need to know how to journalize this in a General Journal, but I don't know if it is required to even write down. Signed a lease agreement to rent office space for \$975 per month, beginning Feb 1st. Nothing was paid today. (This happened on Jan 15)

asked by Kate on October 23, 2014
33. ## Chemistry Balancing Equations

Can you please tell me if these are correct? 1. Sodium Hydrogen Sulfite reacts with hydrochloric acid to produce sulfur dioxide gas, water and sodium chloride NaHSO3 + HCl -----> SO2 + H2O + NaCl 2. Sodium nitrate reacts with hydrochloric acid to produce

asked by Anonymous on March 14, 2011
34. ## Chemistry-Could you check this, please?

I have a balloon that contains 22 grams of Carbon dioxide. The barometric pressure is 1019 millibars which I converted to 1.006 Atm and the temperature is 299 "K". What is the volume of balloon? I used the ideal gas law to find out the volume in liters of

asked by JamieLyn on May 24, 2010
35. ## Chemistry

1. Ethanol and methyl ether have the same elements in same proportions. What is the difference between these two compounds? My guess: Ethanol has a hydroxyl group which is different from methyl ether as methyl ether contains an oxygen atom bonded to two

asked by anonymous on May 9, 2009
36. ## physics

a 20N force is required to stretch a spring by 0.5 m. a) what is the spring constant? b)how much energy is stored in the spring ?

asked by Anonymous on March 12, 2013
37. ## physics

a 20N force is required to stretch a spring by 0.5 m. a) what is the spring constant? b)how much energy is stored in the spring ?

asked by Anonymous on March 12, 2013
38. ## Maths

Jose has a fish tank that measures 11.8 inches wide, 19.7 inches long, and 15.7 inches deep. He empties it halfway to clean it. To refill it when he is done, he will fill a one-gallon jug in the sink and carry it to the tank, pour it in, and then return to

asked by ChrismB on May 11, 2016
39. ## physics

You accelerate your 1500 Kg from 2 m/s to 12 m/s in 2 seconds. How do you determine the cars acceleration initial momentum final momentum change in momentum the force required to do this?

asked by Kelley on January 11, 2016
40. ## Physics

a 50 kg ice skater is skating on a frozen lake where the ice has a coefficient of friction of .08. How much force is required to push her across the ice at a constant velocity?

asked by caroline on October 5, 2016
41. ## Chemistry

You are given a bottle of dry NaCl. Explain the procedures required to make 900mL of a 0.5M NaCl solution. The formula weight of NaCl is 58.4g/mole.

asked by Ana on February 7, 2016
42. ## physics

A circular steel wire 2.00 m is to stretch no more than 0.25 cm when a tensile force of 400 N is applied to each end of wire. What minimum diameter is required for the wire?

asked by colleen on August 22, 2009
43. ## Chm

8.08g of KNO3 were required to saturate 25g of distilled water at 20oC. Calculate the solubility of the solute in a) g/dm^3 of water b) mol/dm^3 of water

asked by Ife on June 10, 2011

Peter Singer argues that giving money to famine relief is: a. Morally permissible. b. Morally forbidden. c. Morally required. d. Supererogatory.

asked by anna on September 8, 2014
45. ## chemistry

A solution of HCI has a density of 1.18 g/ml and is 36% (m/m). what is the molarity and molality of this solution? Assume 100g solution. Then the solute is 36 grams. Figure the moles for that. Then, you know density, so you can compute volume

asked by nancy on March 15, 2007
46. ## chemistry

In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse

asked by Sarah on February 19, 2012
47. ## Chemistry

In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 59.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse

asked by Melody on February 18, 2012
48. ## Chem

In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 41.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse

asked by Andrew on February 21, 2012
49. ## chemistry

In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse

asked by Janice on February 19, 2012
50. ## Chemistry

In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse

asked by Ariel on February 19, 2012
51. ## Psychology

A physiological support of hypnosis as a different state of consciousness is: 1. rapid eye movement initiated when a person is hypnotized. 2. a change in the electrical activity of the brain in hypnosis. 3. the sense of time removed. 4. reaction time slows

asked by Tobbo on June 5, 2011
52. ## Chemistry

30 cubic-centimetre hydrocarbon requires 90 cubic-centimetre of oxygen for complete combustion and 60 cubic-centimetre of carbondioxide is formed .What is the formula of hydrocarbon?

asked by NItesh Kumar on May 14, 2012
53. ## chem

Can somebody help me please??? Ozone, O3 has a O-O-O connectivity. 1. Draw a lewis structure for ozone 2. Calculate the formal charge for each oxygen of ozone 3. Describe the shape of ozone

asked by Nisar on September 1, 2005
54. ## chemistry

Gasahol is a fuel containing ethanol(C2H6O) that burns in oxygen (O2)to give carbon dioxide and water. a)How many moles of O2 are needed to completely react with 4.0 moles of C2H60? b) If a car produces 88g of CO2,how many grams of O2 are used up in the

asked by Connie on March 17, 2011
55. ## chemistry

Write Skeleton equations for these reactions. A) Heating Copper(II) sulfide in the Presence of diatomic oxygen produces pure copper and sulfur dioxide gas. B)When heated, baking soda (Sodium hydrogen carbonate) decomposes to form the products sodium

asked by Jack on February 28, 2010
56. ## Chemistry

.Question part Points Submissions 1 0/0.5 2/3 Total 0/0.5 ...In the explosion of a hydrogen-filled balloon, 0.75 g of hydrogen reacted with 6.9 g of oxygen to form how many grams of water vapor? (Water vapor is the only product.) i already posted this but

asked by Rebekah on September 11, 2010
57. ## Biology

1. Plant seed coats, mycorrhizae, and cuticles are examples of a. ways plants have adapted to life on land b. evolutionary adaptations to limit water absorption c. mechanisms to enhance carbon dioxide release d. both B and C D? 2. Stomata help plants a.

asked by mysterychicken on February 26, 2010
58. ## chemistry

Molarity is to moles of solute over liters of solution as molality is to A. molar concentration over molal concentration. B. moles of solute over kilograms of solvent. C. molal concentration over molar concentration. D. moles of solute over moles of

asked by arthur on July 26, 2013
59. ## biology

In both lecture and lab, the significance of water (H2O), molecular oxygen (O2), and carbon dioxide (CO2) has been emphasized with regard to their energy content or participation in metabolic oxidation and reduction reactions. This lab has demonstrated

asked by tina on October 27, 2010
60. ## Chemistry

A .7178 g sample of a hydrocarbon occupies a volume of 390.7 mL at 65C and 99.2kpa. When the sample is burned in excess oxygen, 2.4267 g CO2 and .4967g H2O are obtained. What is the molecular formula of the hydrocarbon? Write a plausible structural formula

asked by Lisa on September 28, 2014
61. ## chemistry hw

SOMEONE PLEASE HELP AND CONFIRM THE RIGHT ANSWER FOR ME...I HAVE ONE MORE ATTEMPT TO THIS PROBLEM AND I NEED HELP!!!!! PLEASE!!!!!!!!!!!!!!!!!!!! THANKS! In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution

asked by Ariel on February 19, 2012
62. ## Literature - HELP!

Identify the auditor, rhyme scheme, metrical feet, unstressed/stressed syllables and the type of poem it may be. Do Not Go Gentle into That Good Night by Dylan Thomas Do not go gentle into that good night, old age should burn and rave at close of day;

asked by Anonymous on December 14, 2007
63. ## Health

If you were addmitted to the hospital with a heart attack and also hypertension and both required monitoring during your inpatient stay. The hypertension would be considered what ? 1.the pricipal diagnosis 2. a complication 3. the principal procedure 4. a

asked by Abby on March 10, 2008
64. ## science

My apology. I posted the previous question in correctly. Here is the question again: To bring 100cc of water from 20C to 75C, in 1min 25 sec, with 650Watt of energy input, what is the temperature required?

asked by CM on November 15, 2012
65. ## physics imperfect spring

The force required to compress an imperfect horizontal spring an amount x is given by F= 150x+12x^3, where x is in meters and F in newtons. If the spring is compressed 2.1 m, what speed will it give to a 4.0 kg ball held against it and then released?

asked by annie on May 21, 2009
66. ## Chemistry

A minimum energy of 151 kJ is required to dissociate a mole of iodine molecules, I2. Calculate the wavelength of radiation that supplies this energy, assuming each bond beaks by absorbing one photon.

asked by Victor on November 28, 2016
67. ## chemistry

The equilibrium bond length of 1 H35Cl is 126 pm. What is wavelength of the required electromagnetic radiation to excite the rotational state from j=1 to j=2? The masses of 1H and 35Cl are 1.0078 amu and 34.9689 amu, respectively)

asked by StressedStudent on March 10, 2013
68. ## chemistry

Moles chemistry? Calculate the mass of solute required to prepare ib the solution 200cm^3 of solution containig 0.50 mol dm ^-3 cl-iond prepared by dissolving cacl2.6h2o in water.

asked by joanna on December 8, 2016

I'm trying to solve this problem: What sinking fund payment would be required at the end of each three-month period, at 8% interest compounded quarterly, in order to amount to 20,000. I just need to know how to work the problem correctly.

asked by Valerie on January 14, 2011
70. ## Chemistry

The approximate concentration of hydrochloric acid, in the stomach is 0.17M .calculate the mass of the following antacids required to neutralize 50mL of this acid; 1.) bicarbonate of soda, NaHCO3 2.) aluminum hydroxide, Al(OH)3

asked by Katie on November 16, 2017
71. ## College Algebra

Hello Steve, it didn't work for "t" i can't get the actual value... Find the time required for an investment of 1 dollars to grow to 7200 dollars at an interest rate of 7.5 percent per year, compounded quarterly

asked by Chris on July 25, 2014
72. ## criminal justice

The presentence investigation report (PSI) a. reflects positive school interest in the offender B. is based on the concept of parens patriae C. is required in all jurisdictions D. reflects a classical approach E. none of the above

asked by Fernandez on November 4, 2015
73. ## Engineering

Determine the required nominal diameter of a threaded steel rod to carry an axial load of 16,000 pounds in tension if the tensile stress of 20,000 psi is permitted.

asked by David on February 12, 2009
74. ## Statistics

n=1000, bell-shaped Mean - 5,000 ~950 lie +/-100 of 5000 -4900 to 5100 Required 1) Standard Deviation 2) 97.5th percentile value 3) Z-score for 16th percentile

asked by Rhea on September 26, 2010
75. ## math 106

what amortization payment would be required every month, at 12% interest, to pay off a \$125,000 mortgage in 10 years? round your answer to the nearest cent. can you work the steps to this problem for me so i can see the problem clearly?

asked by lindaemory on December 5, 2012
76. ## Chemistry

What mass of baking soda (NaHCO3) would be required to neutralize 10.00mL of 12.1M muriatic acid remaining in a empty water bottle? HCl(aq)+NaHCO3(aq)=>NaCl(aq)+CO2(g)+H2O(l)

asked by Mateo on April 13, 2011
77. ## algebra 2 review

A training ring for horses is an oval formed from a rectangle with two semicircles on either end. Rounded to the nearest foot, how many feet of fencing is required to surround the entire ring with a fence?

asked by Beth on April 28, 2011
78. ## Chem

The reaction for the industrial production of hydrogen cyanide is given below. 2CH4 + 2NH3 + 3O2 --> 2HCN + 6H2O What mass of NH3 is required for the synthesis of 1.5 × 105 kg of HCN if the reaction has a 97.5% yield?

79. ## Chemistry

For a tablet containing 500mg vitamin C, Calculate how many mL of 0.095M NaOH are required for titration ( molar mass of ascorbic acid- vitamin c is 1.76.12g/mol) I am not sure of the conversions to use, how to get started with the question.

asked by Cody on October 13, 2014
80. ## Physics

If you suspend a 90-N rock beneath the surface of ethanol, the tension required to support it is only 60 N. What volume of ethanol (density of 789.2kg/cubic meter) must therefore be displaced? Show your work.

asked by Lenny on February 7, 2017
81. ## math

Determine whether the situation calls for a discrete or continuous random variable. The number of freshmen in the required course, English 101 The braking time of a car I think the first one discrete and the second is continous is this correct?

asked by KiKi on April 25, 2010

Determine whether the situation calls for a discrete or continuous random variable. The number of freshmen in the required course, English 101 The braking time of a car I think the first one discrete and the second is continous is this correct?

asked by KiKi on April 25, 2010
83. ## chem

help, i'd like to know how to do this titration question: for example: a 1g sample of naoh contaminated with na2co3 is titrated with 0.500MHCl, and it is found that 46.5mL of HCl are required for neutralization. Find the percentage by mass Na2Co3. thank

asked by Alex on April 20, 2008
84. ## Physics

What is the magnitude of the average force required to stop an 1500kig car in 8.0 s if the care is traveling at 95 km/h? Formula: Sigma F= ma *convert 95km/h to 26m/s Which kinematic equation do I use and for which variable do I use within the equation?

asked by Mr. McKee on June 11, 2012
85. ## Income tax

Catherine purchased furniture and fixtures (7-year property) for her shop for \$80,000 in May 2013. What AMT depreciation adjustment is required in 2013? A. \$0 B. \$2,864 C. \$8,568 D. \$11,432 The answer is A?

asked by Anthony on June 30, 2016
86. ## physics

If a 648 N body on a carpeted surface has a μs of 0.86 and a μk of 0.68, what amount of force will be required to start dragging the body across the floor? Make sure to report your answer with the correct number of significant figures

asked by Linda on November 5, 2014
87. ## physics

How much heat, expressed in Kwh, is required to raise the temperature of water in a 20,000 gallon pool by 10 degrees C. ? This is a real world question, I'm 18 years old and I service my neighbors pool.

asked by Wolter on April 29, 2013
88. ## Chemistry

What mass, in grams, of sodium carbonate is required for complete reaction with 8.35g of nitric acid to produce sodium nitrate, carbon dioxide, and water? [Show work]

asked by Melissa on February 12, 2014
89. ## Chem

The reaction for the industrial production of hydrogen cyanide is given below. 2CH4 + 2NH3 + 3O2 --> 2HCN + 6H2O What mass of NH3 is required for the synthesis of 1.5 × 105 kg of HCN if the reaction has a 97.5% yield?

90. ## Conceptual Physical Science

When we breathe we inhale oxygen, O2, plus water vapor, O2, and exhale carbon dioxide, CO2, plus water vapor, H2O. Which likely has more mass, the air that we inhale or the same volume of air we exhale? Does breathing cause you to lose or gain weight?

asked by Laticia on July 10, 2010
91. ## chemistry

Solid sodium nitrate can be decomposed to solid sodium nitrite and oxygen gas. If the percentage yield for the reaction is 80.4%, calculate the grams of sodium nitrite that will result from the decomposition of 955grams of sodium nitrate. 2 NaNO3 ¨ 2

asked by lama on May 15, 2009
92. ## Biology

which invertebrate made the transition to life on land,they forced two challenges- the first was to avoid drying out and the second was to develop a means to obtain oxygen. which invertebrate made the transition successfully and what adaptations have they

asked by H on December 16, 2017
93. ## chemistry

how grams of oxygen can be produced from the decomposition of 100g KClO3? how much iron can be recovered from 25.0g of Fe2O3 how can be produced from 125g Ag2S Figure the precentage composition of the compound. For instance percent of Fe in Fe2O3 =

asked by Beautiful on February 26, 2007
94. ## Chemistry2

A student pours 200 grams of methanol, a flammable substance into the sink. Another student causes the bad situation to get evern worse by dropping a lit match into the sink. The methanol burns completely with 300 grams of oxygen from the air. What mass,

asked by Sam on September 9, 2015
95. ## Chemistry

Balance the following equation for a half reaction that occurs in acidic solution. Use e– as the symbol for an electron. U^4+ --> UO2^+ There is a hint: In acidic solution, you may add H2O and H as needed to balance oxygen and hydrogen. When finished,

asked by Clueless on April 28, 2014
96. ## chemistry

Mg + O2 ------> MgO if 1.00 g of magnesium is ignited in a flask containing 0.500liters of oxygen at STP, how many grams of magnesium oxide areproduced? what is the name and the amount of the reactant inexcess? My work: 1g Mg/24.3g=0.041 mol Mg; 0.5L

asked by Lisa on December 30, 2014
97. ## Chemistry

10. Avogadro's number can be used to find the number of atoms in an element.- T 12. A photon is a quantum of light energy.- T 17. The atomic mass unit is determined by Oxygen-16.- F 18. The number of particles in a mole is a constant.- T 19. The number of

asked by mysterychicken on October 21, 2010
98. ## chemistry

Trimellitic acid containing carbon, hydrogen, and oxygen has 51.44% C, 2.88% H, and 45.68% O. It can be obtained by oxidation of coal with nitric acid. A 2.416-g sample of this compound was dissolved in 40.00 g of acetone, producing a solution that boils

asked by David on April 14, 2010