Tuesday
December 6, 2016

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

chemistry
What is n+1+m for 4p orbital and what is n+l+m for 4p orbital
Sunday, October 2, 2016 by sanjay

chemistry
For a skydiver jumping out of a plane at an altitude of 1 km, what would be the concentration of oxygen in his (or her) blood knowing that air pressure at 1 km drops to 89,874 Pa? Assume ideal behavior of gases, normal breathing, 25 °C and constant air composition. Hint: ...
Sunday, October 2, 2016 by carlos

CHemistry
What is the molecular formula of glycerol (a compound containing C, H, and O) from the following combustion analysis: when 2.00 g glycerol are combusted, 2.865 g CO2 and 1.564 g H2O are recovered. I already found uts molar mass its 92g/mol
Sunday, October 2, 2016 by byu

Analytical chemistry
A solution is created using 2.1700 grams of Calcium Hydroxide (MW is 74.093) in a 1L volumetric flask. A 50 mL aliquot is then taken and aded to a 350 mL volumteric flask and filled to the line. Finally, a 10 aliquot of the that solution is taken and added to a 100 mL ...
Sunday, October 2, 2016 by Sam

Analytical chemistry
0.6140 grams of sodium phosphate (Na3PO4) was dissolved in 2 L of water to make a stock solution. 34 mL of this solution is then diluted to 100mL volumetrically to prepare the final solution. Calculate the molarity of phosphate ions in this solution. Answer to 5 decimal places.
Sunday, October 2, 2016 by Sam

CHEMISTRY
calculate the weight of co2 by complete combustion of 1.5 \g of ethane
Sunday, October 2, 2016 by ATHARV Singh

Chemistry
In a titration 100 mL of 3.65 g HCl is added to 200 mL of BA(oh)2 solution of an unknown concentration until the equivalent point find molarity of ba(oh)2
Sunday, October 2, 2016 by Me

Chemistry
A handbook gives the heat of combustion of liquid carbon disulfide as -3.42 kcal/g of the liquid. Write the equation representing the combustion of 1 mol of carbon disufide and the accompanying ΔH value. (hint: the sulfur containing combustion product is sulfur dioxide).
Saturday, October 1, 2016 by Anonymous

Chemistry
Calculate the heat capacity of a sample of radiator coolant if a temperature rise from 5 to 107℃ requires 932 J of heat. My work: c=q/mΔT c=932J/(?)(107℃-5℃)
Saturday, October 1, 2016 by leana

Chemistry
Tin and purple Iodine combine to form an orange solid tin iodide compound. If the compound contains 0.00383 moles of Sn and 0.01534 moles of I, what is its' empirical formula?
Saturday, October 1, 2016 by Kirstin

chemistry
I got this question wrong it was true/false the answer was false A supersaturated solution will have some solid undissolved in the bottom of the container. I don't know why its false?
Saturday, October 1, 2016 by byu

Chemistry
I'm doing online homework and the follow question has come up: Write the formulas of the compounds formed by Pb4+ with the following anions: NO3−, ClO3−, SO32−, H2PO4−. Express your answers as chemical formulas separated by commas. Use the given ...
Saturday, October 1, 2016 by CeeCee

chemistry
List the following strong electrolytes solutions in order of increasing boiling point. a. 0.1 M CaCl2 b. 0.1 M AlCl3 c. 0.1 M CaS
Saturday, October 1, 2016 by carlos

chemistry
 If we combine nitrous oxide (NO, laughing gas) with oxygen (O2) we produce nitrogen dioxide (NO2) according to the following reaction: 2NO + O2→ 2NO2 How many grams of NO2 will be produced when 5.00 moles of NO react?
Saturday, October 1, 2016 by shania

chemistry
A solution containing 40 g of calcium bromide requires 14.2 g of chlorine to react completely with it and 22,2 g of calcium chloride is produced in addition to ehaever bromine is obtained. How many grams of calcium bromide are required to produce 10.0 pounds of bromine?
Saturday, October 1, 2016 by allen

chemistry
Calculate the normality of solution containing 4g of sodium hydroxide present in 1 litre of solution ?
Saturday, October 1, 2016 by sowmiya

CHEMISTRY
I'm trying to figure out the percent composition of a mixture of an unknown (a combination of NaHCO3 and NaCl). Here's my data: Mass of 150mL of empty beaker: 80.937g Mass of 150mL beaker w/ unknown: 81.957g Mass of 150mL beaker w/ unknown after reaction: 89.126g Mass ...
Saturday, October 1, 2016 by Liam

Chemistry
To clarify, a triple bond between carbon and oxygen is more stable than a triple bond between carbon and nitrogen because oxygen is more electronegative. Is my understanding correct?
Friday, September 30, 2016 by Vivian

chemistry
is heating iodine from its solid state to a liquid state a chemical or physical change?
Friday, September 30, 2016 by brandon

chemistry
how many joules of heat are required to heat 149g of aluminum from 31.0 celcius to 75.5 celsius
Friday, September 30, 2016 by katie

Chemistry
I was given a solution of HCOOH with hand approximate concentration of 0.20 moles and I need to titrate this with a 0.110 V mol of NaOH. If I add 20 milliliters of hcooh to the beaker before I titrate approximately what volume of NaOH will be required to reach the endpoint?
Friday, September 30, 2016 by Kabw

Chemistry
Sample of 10.7g of O2 reacts completely with CO to form CO2 3a) How many grams of CO2 will be formed. So 10.7g (1mol/32g) (2molCO2/2molCO2)(22.01gCO2/1molCO2) = 14.7g. Please is this right 3b) is the mass of CO2 ypu determined in the equation (3a) the minimum or the maximum ...
Friday, September 30, 2016 by Zaza

Chemistry
74. Sodium hydrogen carbonate is also known as baking soda. When this compound is heated, it decomposes to sodium carbonate, carbon dioxide, and water vapor. Write the balanced equation for this reaction. What volume of carbon dioxide gas at 77 degrees C and 756 mmHg will be ...
Friday, September 30, 2016 by Martha

Chemistry
Consider a mixture of two gases,A and B, confined in accosted vessel. A quantity of a third gas C, is added to the same vas sekar the same temperature. How does the addition of gas C affect the following: a. The partial pressure of gas A. b. The total pressure in the vassal, c...
Friday, September 30, 2016 by Martha

Chemistry
You want to heat 1 kg of water 10 degrees celsius and you have the following methods under consideration. The heat capacity of water is 4.184 J/K g. (a) You can heat it with a mechanical eggbeater that is powered by a 1-kg mass on a rope over a pulley. How far does the mass ...
Thursday, September 29, 2016 by Joesph

Chemistry
Which of the following compounds has an atom with an unfilled valence shell of electrons? A) H3O+ B) BF3 C) CH3OH D) NaI
Thursday, September 29, 2016 by Veronica

Chemistry
Use bond energies to determine the energy transferred in the reaction between hydrogen and chlorine to make hydrogen chloride. H2 (g) + Cl2 (g) → 2HCl (g)
Thursday, September 29, 2016 by Bear

Chemistry
What volume of (2.5M) Hydrochloric Acid will be needed to neutralize 359mL of a 1.50M solution of potassium hydroxide?
Thursday, September 29, 2016 by Greg

Chemistry
How do you write the isotopic symbol for Uranium -238?
Thursday, September 29, 2016 by Omie

Chemistry
The half life of radon 222 is 3.82 days. If the initial mass of a sample of radon 222 is 198.72 grams, how much will remain after 19.25 days?
Thursday, September 29, 2016 by Jess

Chemistry
You want to heat 1 kg of water 10 celsius and you have the following methods under consideration. The heat capacity of water is 4.184 J/K g. (a)You can send the water through a solar collector that has an area of 1 m^2. How long will it take if the sun's intensity on the ...
Thursday, September 29, 2016 by Joesph

Chemistry
A student performing an experiment mistakenly used 8.0 ml of 16 M HNO3 to dissolve 0.16g of solid copper instead of the 4.0 ml as suggested. how many moles of HNO3 remains after the reaction with copper is complete. 8 moles of HNO3 reacts with 3 moles of Cu im not sure how i ...
Thursday, September 29, 2016 by Anonymous

Organic Chemistry
Hi, I'm trying to fix an incorrect IUPAC name of a molecule. It is given as trisecbutylmethane, and I have to draw it out to correct it. Here's the thing: how do I draw incorrect IUPAC name? I can't wrap my mind around it. What I have drawn out is a tertiary carbon...
Thursday, September 29, 2016 by Justin

chemistry
Write the anodic reaction for the electrolysis of zinc chloride solution using platinum electrode
Wednesday, September 28, 2016 by osmon armin

Chemistry
The standard change in internal energy for the combustion of buckyball is -25,968 kJ/mol. What is the enthalpy of combustion? What is the enthalpy of formation of buckyball? What is the molar enthalpy associated with converting buckyball to graphite? How does this compare to ...
Wednesday, September 28, 2016 by Joesph

Chemistry
0.250 g KCN is dissolved in 50 mL of water, and added to 2 mL of NaOH then mixed with 48mL of water. What is the molar concentration of KCN? I am stuck on this question. So far I have: 0.250gKCN/0.050L= 5M(g/L) Moles of KCN: 5M = mol/0.05L = 0.25mol KCN I am not sure exactly ...
Wednesday, September 28, 2016 by Zach

Chemistry
Write a net ionic equation for the overall reaction that occurs when aqueous solutions of potassium hydroxide and oxalic acid (H2C2O4) are combined.
Wednesday, September 28, 2016 by Adriana

Chemistry
How high can a person (assume a weight of 70 kg) climb on one ounce of chocolate if the heat of combustion (628 kJ) can be converted completely into work associated with vertical displacement?
Wednesday, September 28, 2016 by Joesph

chemistry
A compound contains 74,27%C;7,79%H;12,99%N. Determine the empirical formula. C=12;H=1;N=14;0=16.
Wednesday, September 28, 2016 by christina

chemistry
Calculate the percentage composition of sulphuric acid if the atomic masses are H=1u, S=32u and 0=16u
Wednesday, September 28, 2016 by christina

Chemistry
7. A student conducts an experiment on a different hydrate. The empty crucible is heated to a constant mass of 24.330. A sample of the unidentified hydrate is placed in the crucible, and the total mass is 31.571 g. The crucible and hydrate are heated to constant mass, which is...
Wednesday, September 28, 2016 by Alan

chemistry
71.0 mL of a 1.30 M solution is diluted to a total volume of 238 mL. A 119-mL portion of that solution is diluted by adding 105 mL of water. What is the final concentration? Assume the volumes are additive.
Wednesday, September 28, 2016 by mat choma

Chemistry
What type of reaction is listed below? Prove that it is balanced by listing the number of elements on both side of the equation (reactants vs. products)? CH 3 COOH + NaHCO 3  NaCH 3 COO + H 2 CO 3 2. What type of reaction occurred with H 2 CO 3 from the above equation ...
Wednesday, September 28, 2016 by Brandy

Chemistry
If the concentration of KCN at the equivalence point is 0.1M and the Ka for HCN is 6.2*10^-10 find the pH at the equivalence point. The reaction is between KOH and HCN From my understanding I have to do a stoichiometric calculation and then use the Henderson-Hasselback ...
Wednesday, September 28, 2016 by Maddy

Chemistry
A 349mL sample of 1.659 M HI is mixed with 511 mL sample of NaOH (which has a pH of 13.35). What is the pH of the resulting solution?
Tuesday, September 27, 2016 by Kayla M

Chemistry
1)Calculate the number of mL of a 0.095 M NaOH solution required to neutralize 25.0 mL of 0.15 M acetic acid solution 2) Calculate the molarity of a sodium hydroxide solution if 22.0 mL of the sodium hydroxide is required to neutralize 0.50 g of KHP. NaOH(aq)+ KHC8H4O4 -> ...
Tuesday, September 27, 2016 by Casey

Chemistry
1)Calculate the number of mL of a 0.095 M NaOH solution required to neutralize 25.0 mL of 0.15 M acetic acid solution 2) Calculate the molarity of a sodium hydroxide solution if 22.0 mL of the sodium hydroxide is required to neutralize 0.50 g of KHP. NaOH(aq)+ KHC8H4O4 -> ...
Tuesday, September 27, 2016 by Casey

Chemistry
Rank the following atoms in order of decreasing electronegativity, putting the most electronegative first: F, Ne, O, N, C
Tuesday, September 27, 2016 by Nevaeh

Chemistry
A 19.3L expandible container is filled in a room where the pressure is 761mmHg. It is filled with 600.4mmHg nitrogen, 108mmHg oxygen, 32.1 mmHg water vapor. The rest of the pressure is made up by carbon dioxide. The temperature is 20.3°C a. What is the partial pressure of ...
Tuesday, September 27, 2016 by Anonymous

AP Chemistry
Given that the specific heat capacities of ice and steam are 2.06 J/g · ◦C and 2.03 J/g·◦C, respectively, calculate the total quantity of heat necessary to melt 19.2 g of ice at −50.0◦C and heat it to steam at 200◦C. The molar heats ...
Tuesday, September 27, 2016 by Rachel M

Chemistry
Write the net ionic equation for the equilibrium that is established when ammonium nitrate is dissolved in water. (Use H3O+ instead of H+)
Tuesday, September 27, 2016 by Jen

Chemistry
The concentration of ammonium ion in the solution of the salt called ferrous ammonium sulfate, formula [Fe(NH4)]2(SO4)3, is 0.360 M. The concentration of sulfate ions in this solution is?
Tuesday, September 27, 2016 by Colby

Chemistry
A 349mL sample of 1.659 M HI is mixed with 511 mL sample of NaOH (which has a pH of 13.35). What is the pH of the resulting solution?
Tuesday, September 27, 2016 by Kayla M

AP Chemistry
DrBob222 PLEASE HELP Hf of CO2 = -393.5 kJ/mol Hf of H2O = -285.8 kJ/mol The combustion reaction for benzoic acid C6H5CO2H(s) + 15/2 O2(g) → 7 CO2(g) + 3 H2O(ℓ) has ∆H0 = −3226.7 kJ/mole. Use Hess’s Law to calculate ∆H0f for benzoic acid. 1...
Tuesday, September 27, 2016 by Rachel M

Chemistry
A 635 mL solution of HBr is titrated with 0.51 M KOH. If it takes 1569 mL of the base solution to reach the equivalence point, what is the pH when only 141 mL of the base has been added to the solution?
Tuesday, September 27, 2016 by Taylor J

AP Chemistry
Given that the specific heat capacities of ice and steam are 2.06 J/g ·◦C and 2.03 J/g·◦C,respectively, calculate the total quantity of heat necessary to melt 19.2 g of ice at −50.0 ◦C and heat it to steam at 200◦C. The molar heats ...
Tuesday, September 27, 2016 by Rachel M

chemistry
write down the chemical formular for the following compounds 1.Sodium flouride 2.Berillium chloride 3.Pottasium iodide 4.Rubidium bromide 5.Magnesium sulphide
Tuesday, September 27, 2016 by Dora

chemistry
if copper (II) sulfate pentahydrate is known to be 36% of water how many grams of water will be lost when heating a 5.75 grams sample?
Tuesday, September 27, 2016 by velia

Chemistry
You took 7.15 mL of the 2.20 M solution and diluted it. It's absorbance is 0.605. What is the concentration of the new solution? I have no idea where to even start.
Tuesday, September 27, 2016 by Ciara

Chemistry
Calculate volume of ammonia gas produced at STP when 140g of nitrogen gas is reacted with 30g of hydrogen gas.
Tuesday, September 27, 2016 by Nasreena

Maths
In a class of 60students,the number of student passed Biology is 6 more than the number of student passed Chemistry,8 student passed both subject.How many student passed Biology,how many student passed Chemistry,how many student passed only one subject?
Tuesday, September 27, 2016 by Asare

chemistry
The solubility of barium nitrate at 100°C is 34 g/100 g of H2O and at 0°C is 5.0 g/100g of H2O. If you start with 100 g of Ba(NO3)2 and make a saturated solution in water at 100°C, how much water is required? If the saturated solution is cooled to 0°C, how much...
Tuesday, September 27, 2016 by pragati

Chemistry
A 635 mL solution of HBr is titrated with 0.51 M KOH. If it takes 1569 mL of the base solution to reach the equivalence point, what is the pH when only 141 mL of the base has been added to the solution?
Tuesday, September 27, 2016 by Taylor

Chemistry
How many different oligosaccharides can be made by linking one glucose and one galactose if the anomeric carbon of glucose is involved in the glycosidic bond? Assume that each sugar is in its pyranose form. A. 5 B. 4 C. 2 D. 1 E. 3 Would it be 4?
Monday, September 26, 2016 by Anonymous

Chemistry
The bond between a glycoprotein and a carbohydrate is made to which atom of a monosaccharide? A. C-3 B. C-6 C. varies with different glycoproteins D. anomeric carbon E. C-4 Would the answer be (E) C-4?
Monday, September 26, 2016 by Anonymous

Chemistry
A 19.3L expandible container is filled in a room where the pressure is 761mmHg. It is filled with 600.4mmHg nitrogen, 108mmHg oxygen, 32.1 mmHg water vapor. The rest of the pressure is made up by carbon dioxide. The temperature is 20.3°C a. What is the partial pressure of ...
Monday, September 26, 2016 by Anonymous

chemistry
A sample of neon gas is held in a rigid 2.284L container with a pressure of 1.036 atm at 24.3°C. 4.093g of an unknown cold gas is added to the container. The temperature drops to 20.3°C, but the pressure rises to 1.960atm. What is the molar mass of the added gas?
Monday, September 26, 2016 by Anonymous

Organic Chemistry
Compound A has solubility at 20 degrees celsius of .029 g / 10.0 mL. How much of compound A will remain in solution after cooling to 20 degrees C?
Monday, September 26, 2016 by Lauren

Chemistry
Dr. Bob222 I still didn't understand which is the reduction half reaction and its products and oxidation half reaction...and why is it O3 to IO3-...0 to -6 and then Please help...entrance exam soon Write the oxidation and reduction half reactions(showing e- lost or gained...
Monday, September 26, 2016 by Maria

Chemistry
Water drips from a faucet into a flask at the rate of two drops every 5 seconds. A milliter of water is 20 drops. What volume of water, in liters, will be collected in 2.5 hours.
Monday, September 26, 2016 by Tyler

chemistry
Calculate energy change that produced the 4th line in lyman series
Monday, September 26, 2016 by maria

chemistry
how many grams of barium would be found in 1.72g of barium sulfate 1.72(137.3/233.4)
Sunday, September 25, 2016 by lola

Chemistry
The density of a sample of F2(g) is 1.559 g/L. If the gas is held at 755 torr, calculate the temperature. how would i calculate the volume to use
Sunday, September 25, 2016 by Anonymous

Chemistry
Wat is the product of Mn^+2 + NH3? is it Mn(NH3)2?
Sunday, September 25, 2016 by Eb

Chemistry
4.12 grams of Zinc are placed in a crucible with 3.00 grams (excess) of Sulfur. when reaction is complete the product mass is 6.10 grams. What mass of Sulfur should be used in the simplest formula calculation? Find the empirical formula of Zinc Sulfide. My work... 6.10 g ...
Sunday, September 25, 2016 by Jakob

Chemistry
Cynthia combines 1.7 grams of Silver hydroxide with 234 ml of a 1.2 M solution of HBr. Assume all the silver hydroxide dissolves once it is in solution(which is technically not the case, but for this example, just go with the flow of it). What will be the final pH of the ...
Sunday, September 25, 2016 by Kane

Ap Chemistry
Saccharin has a pKa of 2.32 It has a formula of HNC7H4SO3 If you dissolve 4.6 grams of saccharin in 478 ml of water, what is the resulting pH ?
Sunday, September 25, 2016 by John

Chemistry
What is the volume of the oxygen produced when 1.00L carbon dioxide reacts with 20.0 g of Na2O2 based on the following unbalanced reaction at 25C and 2.00 bar? Na2O2 + CO2 -> O2 + Na2CO3 R = 0.083145 L bar K-1 mol-1 I got 1.57L but the answer is 500mL
Sunday, September 25, 2016 by Mary

Basic Chemistry
A 150L water heater is set to a cutoff temperature of 49 degrees C and that the incoming water is at 298K, calculate the energy in kJ needed to get this 150L water to it's maximum temperature. Please help!
Sunday, September 25, 2016 by Hannah

Chemistry
Is the flame coloration a test for the metal or for the acid radical?
Sunday, September 25, 2016 by Judy

Chemistry
if I want to show the results of a nitrate analysis as nitrogen what is the equation
Sunday, September 25, 2016 by Anonymous

chemistry
How many GRAMS of carbon dioxide can be produced from 3.70 grams of oxygen ?
Saturday, September 24, 2016 by lola

Chemistry
Similar question to http://www.jiskha.com/display.cgi?id=147​4753951 "If that 22.33g sample of calcium chloride was dissolved in 1000.0g of water, with both substances originally at 25.0C, what would be the final temperature of the solution be? Assume no loss of ...
Saturday, September 24, 2016 by Steve

Chemistry
Please help...entrance exam soon Write the oxidation and reduction half reactions(showing e- lost or gained) for the foll O3 + I- -> IO3- + O2 (acidic)
Saturday, September 24, 2016 by Maria

Organic Chemistry
What would happen to the melting point of a solid if it is mixed with granular particles of glass? Explain.
Saturday, September 24, 2016 by Anonymous

Chemistry
Andrew weighs 45 lbs and requires insulin. His doctor has prescribed 0.150 units of insulin/kg body weight/hr while he is in the hospital. The insulin bottle you have possesses a concentration of 20.0 units/15.0 ml and all must be given. Give all answers to three sig figs. a. ...
Saturday, September 24, 2016 by Amy

Chemistry
CaCl2(s) -> Ca(aq) + 2Cl(aq) ΔH_rxn = +198.0 KJ "If that g sample of calcium chloride was dissolved in 1000.0g of water, with both substances originally at 25.0C, what would be the final temperature of the solution be? Assume no loss of heat to the surroundings ...
Saturday, September 24, 2016 by Maddison

Chemistry
Five year old Andrew weighs 45 lbs and requires insulin. His doctor has prescribed 0.150 units of insulin/kg body weight/hr while he is in the hospital. The insulin bottle you have possesses a concentration of 20.0 units/15.0 ml and all must be given. Give all answers to three...
Saturday, September 24, 2016 by Laura

Chemistry
The pressure in pressure cooker is 1.90 what will be the temperature
Saturday, September 24, 2016 by Humza Alvi

Chemistry
Aqueous solutions of copper (II) sulfate, CuSO4, and potassium carbonate, K2CO3, a blue parcipitate of copper (II) carbonate forms in addition to one other compound. We have to write the balanced chemical equation for that but our teacher didn't teach us anything about that
Saturday, September 24, 2016 by Sarah

CHEMISTRY HELP
Reaction: 1/2N2 + 3/2H2 --> NH3 Delta H = -46Kj/mol 1) Find delta H n(NH3)formed=5 mol. M(NH3=8.5g) 2) Find delta H a)3 mol H2 + 3 mol N2 b) 3 mol H2 + 0.5 mol N2 M NH3 = 17 g/mol ???
Saturday, September 24, 2016 by Christine

Chemistry (Help!)
Reaction: 1/2N2 + 3/2H2 --> NH3 Delta H = -46Kj/mol 1) Find delta H n(NH3)formed=5 mol. M(NH3=8.5g) 2) Find delta H a)3 mol H2 + 3 mol N2 b) 3 mol H2 + 0.5 mol N2 M NH3 = 17 g/mol ???
Saturday, September 24, 2016 by Christine

chemistry
A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 252 torr . Pure pentane and hexane have vapor pressures of 425 torr and 151 torr, respectively, at room temperature. What is the mole fraction of hexane? (Assume ideal...
Saturday, September 24, 2016 by liz

chemistry
If 10.0 L of butane and oxygen are combined at the same temperature and pressure, which gas will be left over after reaction? Include your calculation/reasoning.
Saturday, September 24, 2016 by Darren

Chemistry
to determine the concentration of ascorbic acid in fruit juice using DCPIP
Saturday, September 24, 2016 by Zanele

chemistry
A solution contains naphthalene (C10H8) dissolved in hexane (C6H14) at a concentration of 11.07 % naphthalene by mass. Calculate the vapor pressure at 25 ∘C of hexane above the solution. The vapor pressure of pure hexane at 25 ∘C is 151 torr.
Saturday, September 24, 2016 by elizabeth

chemistry
Paper pulp is sold on the basis that it contains 12% moisture; if the moisture exceeds this value, the purchaser can deduct any charges for the excess moisture and also deduct for the freight costs of the excess moisture. A shipment of pulp became wet and was received with a ...
Saturday, September 24, 2016 by jana

Chemistry
An element has three stable isotopes. One has a mass number of 63 and an abundance of 50%. The second has a mass number of 65 and an abundance of 30%. The third has a mass number of 67 and an abundance of 20%. Calculate the relative atomic mass of this element. I am so ...
Saturday, September 24, 2016 by Robert

chemistry
A sample of CaCl2⋅2H2O/K2C2O4⋅H2O solid salt mixture is dissolved in ~150 mL de-ionized H2O. The oven dried precipitate has a mass of 0.253 g. The limiting reactant in the salt mixture is K2C2O4⋅H2O. Determine Mass of K2C2O4⋅H2O(aq) in Salt Mixture in ...
Friday, September 23, 2016 by maricela

chemistry
In a large building, oil is used in a steam boiler heating system. The combustion of 1.0 lb of oil provides 2.2×107J. Part A How many kilograms of oil are needed to heat 110 kg of water from 24 ∘C to 100∘C? (Assume that 1lb=454g, the specific heat of liquid ...
Friday, September 23, 2016 by john

  1. Pages:
  2. <<Prev
  3. 2
  4. 3
  5. 4
  6. 5
  7. 6
  8. 7
  9. 8
  10. 9
  11. 10
  12. 11
  13. 12
  14. 13
  15. 14
  16. 15
  17. 16
  18. Next>>

Homework Help: Science