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May 25, 2016

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

AP Chemistry
Assuming all volume measurements are made at the same temperature and pressure, what volume of hydrogen gas is needed to react completely with 2.96 L of oxygen gas to pro- duce water vapor? Answer in units of L
Sunday, October 13, 2013 by Anonymous

Chemistry
If a solution containing 52.044 g of mercury(II) chlorate is allowed to react completely with a solution containing 15.488 g of sodium sulfate, how many grams of solid precipitate will be formed? How many grams of the reactant in excess will remain after the reaction? I have ...
Sunday, October 13, 2013 by Chelsea

Chemistry
Enter the net ionic equation, including phases, for the reaction of AgNO3(aq) with BaO(aq). Is it... Ag+O2--->AgO?
Sunday, October 13, 2013 by Chelsea

Chemistry- dilution
51.0 mL of a 1.20 M solution is diluted to a total volume of 248 mL. A 124-mL portion of that solution is diluted by adding 125 mL of water. What is the final concentration? Assume the volumes are additive.
Sunday, October 13, 2013 by Chelsea

Chemistry
Which of the following is not suitable for testing the presence of an acid? A) adding aqueous potassium carbonate. B) adding aqueous potassium hydroxide. C) adding Universal Indicator. D) adding zinc powder. Personally, I feel that all of them are suitable.
Sunday, October 13, 2013 by Hao

Chemistry
Electron exhibiting a particle wavelength of 5.2 x 10-9 are emitted from hydrogen atoms after interaction with high energy photons. Assuming that the electrons in the hydrogen atom were in their ground state prior to interaction, determine the wavelength of the photon which ...
Sunday, October 13, 2013 by Chemistry

Chemistry
Electron exhibiting a particle wavelength of 4.02 x 10-9 are emitted from hydrogen atoms after interaction with high energy photons. Assuming that the electrons in the hydrogen atom were in their ground state prior to interaction, determine the wavelength of the photon which ...
Sunday, October 13, 2013 by ss01

Chemistry
Why do the bond energies decrease in the order Ge-Cl, Ge-Br, Ge-I? 1. Covalent bond energies generally increase as you go down the periodic table 2. Covalent bond energies generally decrease as you go down the periodic table 3.Ionic bond energies generally decrease as you go ...
Sunday, October 13, 2013 by ss01

Chemistry
Why is the Ge-F bond energy so much more than the Ge-Cl bond energy? 1. Covalent bond energies generally increase as you go down the periodic table 2. Covalent bond energies generally decrease as you go down the periodic table 3. The Ge-F bond is more polarizable than the Ge-...
Sunday, October 13, 2013 by ss01

Chemistry
1)Which substance ( Ar or F2 ) has the higher boiling point? Select the two most important reasons below to justify your choice should have the higher boiling point *Both substances are nonpolar but the higher boiling includes hydrogen bonding *Both substances are nonpolar but...
Sunday, October 13, 2013 by walter white

CHEMISTRY
18cm^3 of 1.0M H2SO4 just reacted with 24cm^3 of 1.5M NaOH to form sodium sulfate & water. Calculate the amounts in moles of sulfuric acid & sodium hydroxide reacting & write an equation for the reaction.
Saturday, October 12, 2013 by Janey

Chemistry
Which substance ( HI or Xe ) has the higher boiling point? Its HI but chose one of the most appropriate reason. 1. Both substances are nonpolar but the higher boiling includes hydrogen bonding 2. Both substances are nonpolar but the higher boiling is more polarizable 3. The ...
Saturday, October 12, 2013 by ss01

Chemistry
Which substance ( HBr or HF ) has the higher boiling point? Its HF but chose one of the most appropriate reason. 1. Both substances are nonpolar but the higher boiling includes hydrogen bonding 2. Both substances are nonpolar but the higher boiling is more polarizable 3. The ...
Saturday, October 12, 2013 by ss01

Chemistry
What are the equations for these two equations? Not net ionic equations. a) Nickel (II) chloride and iron b) Sodium and water
Saturday, October 12, 2013 by Matt

chemistry
Aluminium is manufactured by electrolysis(electrolytic decomposition) of bauxite, Al2O3. How much aluminium can be obtained from 1kg of pure bauxite? --you have 1 mol of Al2O3 n 1 kg....I still don't get it.
Saturday, October 12, 2013 by LC- reply to DrBob222

Chemistry
What is the pressure of the gas in a manometer if the height in between is 71mm and the atmospheric pressure is 761mmHg?
Saturday, October 12, 2013 by Chelsea

chemistry
Aluminium is manufactured by electrolysis(electrolytic decomposition) of bauxite, Al2O3. How much aluminium can be obtained from 1kg of pure bauxite?
Saturday, October 12, 2013 by LC

Chemistry
The rate constants for a reaction are found to be k(-35 C) = 1.0 x 10-3 s-1 k(-25 C) = 2.0 x 10-3 s-1 At what temperature (in degrees C) will the rate constant be 3.79 x 10-3 s-1?
Saturday, October 12, 2013 by ss01

Chemistry
Determine the minimum potential that must be applied to a proton so that, on interaction with a hydrogen atom, it can excite the ground state electron to a state of n=3 please tell steps in brief
Saturday, October 12, 2013 by ss01

Chemistry
Assume for fluorine a relative electronegativity of xp=4.0, determine xcarbon. [Given: BEC-C=347 kJ/mol; BEF-F=155 kJ/mol; BEC-F=429 kJ/mol.
Saturday, October 12, 2013 by ss01

Chemistry
Element L has an average atomic mass of 54.2488 amu and is composed of two isotopes. The first has a mass of 55.2036 amu and makes up 41.030% of a standard sample. What is the mass of the second isotope? I under how to get average atomic mass but not sure how to get the second...
Saturday, October 12, 2013 by Star

Chemistry
What volume of a liquid having a density of 4.55 g/cm3 is needed to supply 10.47 grams of that liquid? Answer in cm3.
Saturday, October 12, 2013 by Andy

CHEMISTRY...IMPORTANT
2. If air is 20.9% oxygen by volume, a. how many liters of air are needed for complete combustion of 25.0 L of octane vapor, C8H18? b. what volume of each product is produced? 25L C8H18 x (25 mol O2/2 mol C8H18) = 312.5 L O2 (if it were pure O2). Then 20.9% of what number = ...
Saturday, October 12, 2013 by Anonymous

gc chemistry
What affects peak shape in gc? I know peak area is proportional to the amount of a species and tailing occurs due to adsorption of polar species. Also fronting can occur if too much sample is added but these are the only things i can think of that would affect peak shape. i ...
Saturday, October 12, 2013 by Instrumental

CHEMISTRY.....AND THIS IS IMPORTANT
2. If air is 20.9% oxygen by volume, a. how many liters of air are needed for complete combustion of 25.0 L of octane vapor, C8H18? b. what volume of each product is produced? 25L C8H18 x (25 mol O2/2 mol C8H18) = 312.5 L O2 (if it were pure O2). Then 20.9% of what number = ...
Saturday, October 12, 2013 by Anonymous

CHEMISTRY...........
1. If 29.0 L of methane, CH4, undergoes complete combustion at 0.961 atm and 140°C, how many liters of each product would be present at the same temperature and pressure? My answer: (0.961 atm)(29.0 L) (413k) all divided by (413)(0.961 atm)=29.0 L CO2 29.0 L CO2 x 2LH2O/...
Friday, October 11, 2013 by Anonymous

gc chemistry
What affects peak shape in gc? I know peak area is proportional to the amount of a species and tailing occurs due to adsorption of polar species. Also fronting can occur if too much sample is added but these are the only things i can think of that would affect peak shape.
Friday, October 11, 2013 by Instrumental

chemistry
Complete combustion of 8.80 g of a hydrocarbon produced 27.1 g of CO2 and 12.5 g of H2O. What is the empirical formula for the hydrocarbon?
Friday, October 11, 2013 by Anonymous

Chemistry
Use activity coefficients to find the concentration of hydrogen ions in a solution of 75.0 mM butanoic acid and 0.01 M NaCl. The ionization constant of butanoic acid is Ka = 1.52 × 10-5. Take the size of C3H7COO– to be 500 pm. What is the concentration of H+? What ...
Friday, October 11, 2013 by martini

gc chemistry - retention time
adjusted retention time is the time a species spends in the stationary phase. its the total time it takes the species to elute minus the time it takes for an unretained species to elute. corrected retention data accounts for the change in pressure from the head of the column ...
Friday, October 11, 2013 by Instrumental

AP Chemistry
How much work is done by the system when 2.00 moles of O2 expand from a volume of 3.00 liters to a volume of 9.6 liters against a constant external pressure of 0.0100 atm answer in units of joules
Friday, October 11, 2013 by Gabriella

AP Chemistry
Convert 8.3×10^5 cal to kiloJoules
Friday, October 11, 2013 by Gabriella

AP Chemistry
A typical bathtub can hold 93 gallons of water. Calculate the mass of natural gas that would need to be burned to heat the water for a tub of this size from 60◦F to 99◦F. Assume that the natural gas is pure methane(CH4) and that the products of combustion are ...
Friday, October 11, 2013 by Gabriella

chemistry
Write the equation for the combination of magnesium and oxygen to form magnesium oxide, MgO.
Friday, October 11, 2013 by Anonymous

chemistry
When doing an experiment with a calorimeter why is important to keep the lid on?
Friday, October 11, 2013 by Cheryl

chemistry
A 1.213g sample of an unknown weak monoprotic acid was titrated to the endpoint with 27.25mL of a 0.3016M NaOH Calculate: -the number of moles of base reacted. -the number of moles of acid originally present. -the molar mass of the acid.
Friday, October 11, 2013 by katelyn

CHEMISTRY
A solution contains 10.05 grams of an unknown covalent substance in 50.0 grams of water. The freezing point of this solution is (-) 3.16o C. What is the formula weight of the unknown compound?
Friday, October 11, 2013 by NEHE

chemistry
A solution contains 10.05 grams of an unknown covalent substance in 50.0 grams of water. The freezing point of this solution is (-) 3.16o C. What is the formula weight of the unknown compound? Below is what I tried, but don't know what to do next. Please explain step-by-...
Friday, October 11, 2013 by Anonymous

Chemistry
Consider the reaction 2D2(g)+O2(g)→2D2O(l) What is the mass of heavy water, D2O(l), produced when 3.75g of O2(g) reacts with excess D2(g)?
Friday, October 11, 2013 by Carol

Chemistry
How many joules (J) are needed to increase the temperature of 43.0g of aluminum from 25 degrees celcius to 50 degrees celcius? (Cp of Al=0.90J/g degrees of celcius) I also need the formula, data, and answer.
Thursday, October 10, 2013 by Jaret

Chemistry
How many moles of K2O are present in 40.0 mL of a 0.3 M K2O solution? I also need the formula, data, and answer.
Thursday, October 10, 2013 by Jaret

Chemistry
Calculate the number of atoms in 46.0 grams of Calcium 9(Ca)
Thursday, October 10, 2013 by Jaret

chemistry
In my organic lab, we synthesized synthetic banana oil. I'm asked what gas escaped during the sodium bicarbonate washing and to write two reactions that took place during that operation. I know carbon dioxide escaped but I don't know how to write out the formulas.
Thursday, October 10, 2013 by Wesley

Chemistry
Please help and explain each problem. PLEASE!!!! 1. If 29.0 L of methane, CH4, undergoes complete combustion at 0.961 atm and 140°C, how many liters of each product would be present at the same temperature and pressure? 2 If air is 20.9% oxygen by volume, a. how many ...
Thursday, October 10, 2013 by Anonymous

CHEMISTRY
1. If 29.0 L of methane, CH4, undergoes complete combustion at 0.961 atm and 140°C, how many liters of each product would be present at the same temperature and pressure? 2 If air is 20.9% oxygen by volume, a. how many liters of air are needed for complete combustion of 25...
Thursday, October 10, 2013 by Anonymous

Chemistry
The following questions concern the iconic Nestle Toll House Chocolate Chip Cookie recipe, shown below: 2 1/4 cups all-purpose flour 1 teaspoon baking soda 1 teaspoon salt 1 cup butter or margarine, softened 3/4 cup granulated sugar 3/4 cup packed brown sugar 1 teaspoon ...
Thursday, October 10, 2013 by qwerty

Chemistry
The following questions concern the iconic Nestle Toll House Chocolate Chip Cookie recipe, shown below: 2 1/4 cups all-purpose flour 1 teaspoon baking soda 1 teaspoon salt 1 cup butter or margarine, softened 3/4 cup granulated sugar 3/4 cup packed brown sugar 1 teaspoon ...
Thursday, October 10, 2013 by qwerty

Chemistry
I have a few question for my review. 1) How would you prepare 30.0 ml of 0.600M HNO3 From a stock solution of 4.00M HNO3? What volume in ML of the 4.00 M HNo3 will you need? 2) if a 83.5 & was repoarted for a reaction that could have produced 12.1 g of product? what was the ...
Thursday, October 10, 2013 by Matt

Chemistry
1)Buttermilk has 9 grams of protein and 12 grams of carbohydrate per cup (237ml). Estimate the concentration in mol/L of protein using the fact that the average protein is 300 amino acids long and the average amino acid has a mass of 110 amu. 2)Lactose (MW:342 amu) makes up ...
Thursday, October 10, 2013 by qwerty

Chemistry
Identify the major macronutrient by weight in each of the following key ingredients. Olive oil Carbohydrates Fats Proteins Buttermilk/milk Carbohydrates Fats Proteins Neither Distilled vinegar Carbohydrates Fats Proteins Plain Greek yogurt Carbohydrates Fats Proteins Which ...
Thursday, October 10, 2013 by qwerty

Chemistry
Which nutrient is most abundant (by weight) in eggplants? Carbohydrates Fats Proteins Add up the total mass of carbohydrates, fats, and proteins in a serving of eggplant. What fraction of the eggplant's weight is made up of these ingredients? Which of the following ...
Thursday, October 10, 2013 by qwerty

Chemistry
The elements of which group in the periodic table release the most energy by gaining an electron? The elements of which group in the periodic table absorb the most energy when gaining an electron?
Thursday, October 10, 2013 by Kara

Chemistry
What would be the speed of the following particles if they had the same wavelength as a photon of green light (λ = 500.0 nm)? Proton (mass = 1.673*10^(-24)g) =_____ neutron (mass = 1.675*10(-24)g) =_____ electron (mass = 9.109*10^(-28)g) =_____ alpha particle (mass = 6....
Thursday, October 10, 2013 by Natalie

Chemistry
Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n = 6 to n = 1.
Thursday, October 10, 2013 by Laurie

Chemistry
A metal foil has a threshold frequency of 5.45× 1014 Hz. Which of the colors of visible light have enough energy to eject electrons from this metal.
Thursday, October 10, 2013 by Jake

Chemistry
Geologists can estimate the age of rocks by their uranium-238 content. The uranium is incorporated in the rock as it hardens and then decays with first-order kinetics and a half-life of 4.5 billion years. A rock is found to contain 82.7% of the amount of uranium-238 that it ...
Thursday, October 10, 2013 by Becky

Chemistry
when a boiling point is 120 digrees C, and melting point is -12, what is its agregate condition in 0 digrees?
Thursday, October 10, 2013 by himan

chemistry
Calculate the equilibrium constant for the weak base C5H5N, if a solution of the base with an initial concentration of 5.74×10-3 M has a [C5H5NH+] of 0.00000283 M (make an approximate calculation assuming that initial concentration is equal to the equilibrium ...
Thursday, October 10, 2013 by HELP ASAP PLEASE

chemistry
Estimate the initial [C6H5CO2H] in an aqueous solution in which the [C6H5CO2-] is 0.000172 M at equilibrium (make an approximate calculation assuming that initial concentration is equal to the equilibrium concentration). C6H5CO2H = C6H5CO2- + H+
Thursday, October 10, 2013 by HELP ASAP PLEASE

chemistry
Estimate the equilibrium constant for the weak acid HCO2H, if a 2.19×10-3 M aqueous solution of HCO2H has a pH 3.21 (make an approximate calculation assuming that initial concentration is equal to the equilibrium concentration). HCO2H = HCO2- + H+
Thursday, October 10, 2013 by HELP ASAP PLEASE

chemistry
Calculate the pH of a 5.75×10-2 M solution of the weak acid HCN (make an approximate calculation assuming that initial concentration is equal to the equilibrium concentration). Round your answer to 3 significant digits. HCN = CN- + H+
Thursday, October 10, 2013 by HELP ASAP PLEASE

chemistry
Calculate the [OCl-] of a 7.03×10-2 M solution of the weak acid HClO (make an approximate calculation assuming that initial concentration is equal to the equilibrium concentration). Round your answer to 3 significant digits. HClO = OCl- + H+
Thursday, October 10, 2013 by HELP ASAP PLEASE

chemistry
Calculate the [CH3CO2H] in a solution if it has a pH 3.21. CH3CO2H = CH3CO2- + H+
Thursday, October 10, 2013 by HELP ASAP PLEASE

CHEMISTRY........
i TRIED TO DO IT, BUT MY ANSWERES ARE WRONG. Please show work and explain. 1. If 29.0 L of methane, CH4, undergoes complete combustion at 0.961 atm and 140°C, how many liters of each product would be present at the same temperature and pressure? 2 If air is 20.9% oxygen by...
Thursday, October 10, 2013 by Anonymous

chemistry
Calculate the molarity (M) of a solution of the strong acid H2SO4 if the hydrogen ion concentration is 0.000244 M.
Thursday, October 10, 2013 by HELP ASAP PLEASE

chemistry
Calculate the molarity (M) of a solution of the strong base RbOH if the hydroxide ion concentration is 0.000309 M.
Thursday, October 10, 2013 by HELP ASAP PLEASE

chemistry
Calculate the pH of a 3.00×10-4 M solution of the strong acid HClO4. Round your answer to 3 significant digits.
Thursday, October 10, 2013 by HELP ASAP PLEASE

Chemistry
How do I prepare 30 mL of NaOH by dissolving it in water?
Wednesday, October 9, 2013 by AA

chemistry
Can anyone explain dimensional analysis to me like (grams to moles, avogadros number) and all those things. Im doing all the work but im obviously doing it wrong my answers are completely opposite of what they should be.
Wednesday, October 9, 2013 by kianna

Chemistry
Duralin is an alloy of aluminium containing 4.5% manganese, 3.5% copper, and 0.45% magnesium. How much magnesium is present in a 32 g sample of this alloy? Answer in units of mol
Wednesday, October 9, 2013 by Susan

Chemistry
How many moles of NH3 can be produced from 19.5mol of H2 and excess N2
Wednesday, October 9, 2013 by Capri

chemistry
J. J. Berzelius collected the following data for three reactions: Reaction 1 – 11.56 grams of lead sulfide, PbS, were formed when 10.0 grams of lead reacted with 1.56 grams of sulfur Reaction 2 – 11.56 grams of lead sulfide were formed when 10.0 grams of lead reacted...
Wednesday, October 9, 2013 by Brittney

chemistry
When cane sugar reacts with oxygen in living systems, carbon dioxide and water are produced. What weight of carbon dioxide can be produced from the reaction of 15.0 grams of cane sugar with 15.0 grams of oxygen? (Hint: balance the equation) ___C12H22O11(s) + ___O2(g)  ...
Wednesday, October 9, 2013 by Brittney

Chemistry
What is the relationship of the concentration of H3O and of OH
Wednesday, October 9, 2013 by Dee

chemistry
why is chlorine gas bubbled through concentrated sodium chloride solution?
Wednesday, October 9, 2013 by refilwe

chemistry
how many H2O molecules can be formed from 200 H2 molecules and 200 O2 molecules?
Wednesday, October 9, 2013 by Brittney

chemistry
can calcium hydroxide solution be used to distinguish Co(NO3)2 and Fe(NO3)3 sloutions using only the titration technidue presented in this lab
Wednesday, October 9, 2013 by kendar

chemistry (DrBob222)
A student fails to fill the cuvette 2/3 full with the reaction mixture ( CV+ and OH-). What effect does this error have on the measured absorbance values? Thank you :)
Wednesday, October 9, 2013 by K

chemistry
The band gap of indium gallium arsenide varies based on the concentration of gallium in the material. A sample of InGaAs absorbs light with a wavelength less than 1.37 microns. What is the band gap of the InGaAs sample in eV
Tuesday, October 8, 2013 by heyyou

organic chemistry
1if you open the tert-butyl chloride and tert-butyl bromide to the air for few hours? What happened to the ratio of the halide mixture during this time? (2-methyl-2-propanol reaction )
Tuesday, October 8, 2013 by jenny

Chemistry
Microwave ovens emit microwave energy with a wavelength of 13.0 cm. What is the energy of exactly one photon of this microwave radiation?
Tuesday, October 8, 2013 by Laura

Chemistry
PLEASE HELP. If I have 0.10 mL of 200 mcg/mL protein, 0.90 mL of distilled water, and 2.00 mL of Bradford reagent, what is the concentration of the protein?
Tuesday, October 8, 2013 by AA

chemistry
Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 5.50-g sample is burned, and 1.70 g of CO2(g) is produced. What was the mass percentage of the table salt in the mixture?
Tuesday, October 8, 2013 by ian

chemistry
Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 5.50-g sample is burned, and 1.70 g of CO2(g) is produced. What was the mass percentage of the table salt in the mixture?
Tuesday, October 8, 2013 by ian

chemistry
a compound contains 5.2% by mass Nitrogen. It also contains carbon, hydrogen and oxygen. Combustion of 0.085g of the compound produced 0.224g of carbon dioxide and 0.0372g of water. Calculate the empirical formula of the compound.
Tuesday, October 8, 2013 by martina

Chemistry
During your experiment, you are drive water from the hydrate M x X y ⋅zH 2 O . You subsequently determine that your hydrate has four molecules of waters associated with each formula unit. However, the bottle the hydrate came from indicated a formula with only six ...
Tuesday, October 8, 2013 by Sara

chemistry
Im stuck on these few questions that seems to be getting me no where : c HCl = 0.1812 c NaOH = 0.1511 volume of HCl added : 75 volume of NaOH added: 29.23,19.58,33.3 -Determine the number of mmoles of HCl that did not react with the anatacid. - mmoles of HCl neutralized by the...
Tuesday, October 8, 2013 by kathy

chemistry
The band gap of indium gallium arsenide varies based on the concentration of gallium in the material. A sample of InGaAs absorbs light with a wavelength less than 1.37 microns. What is the band gap of the InGaA sample in eV
Tuesday, October 8, 2013 by heyyou

chemistry
The band gap of indium gallium arsenide varies based on the concentration of gallium in the material. A sample of InGaAs absorbs light with a wavelength less than 1.37 microns. What is the band gap of the InGaA sample in eV
Tuesday, October 8, 2013 by heyyou

Chemistry
10.7L of a gas at 1.75 atm are expanded to 20.0L at a mass constant temperature.what the new gas pressure?
Tuesday, October 8, 2013 by Margaret

Chemistry
10.7L of a gas at 1.75 atm are expanded to 20.0L at a mass constant temperature.what the new gas pressure?
Tuesday, October 8, 2013 by Margaret

Chemistry
10.7L of a gas at 1.75 atm are expanded to 20.0L at a mass constant temperature.what the new gas pressure?
Tuesday, October 8, 2013 by Margaret

Chemistry
HCl(aq) +NaOH(aq) ---> NaCl +H2O In a coffee cup calorimeter 50 ml of 2.00M HCl was combined with 50ml of 2.05M NaOH. a) What is the enthalpy change for the reaction? b) What is the molar enthalpy for the reaction? Given: Change in T= 14 degrees celsius heat capacity of the...
Tuesday, October 8, 2013 by Kuu

chemistry
Im stuck on these few questions that seems to be getting me no where : -Determine the number of mmoles of HCl that did not react with the anatacid. c HCl = 0.1812 c NaOH = 0.1511 volume of HCl added : 75 volume of NaOH added: 29.23,19.58,33.3 - mmoles of HCl neutralized by the...
Tuesday, October 8, 2013 by karen

Chemistry 12
Calculate the volume of 12 M Na2SO3 which needs to be added to 500.0 mL of water in order to produce a solution in which [Na+]= 0.200 M.
Tuesday, October 8, 2013 by Riann

Chemistry 12
The molar solubility of calcium sulphate CaSo4 is 8.43 x 10-3(10 to the power of negative 3) M. Calculate the mass of solid CaSo4 which can be evaporated from 250.0 mL of a saturated solution of CaSO4.
Tuesday, October 8, 2013 by Riann

Chemistry 12
Calculate the mass of K2CRO4 needed to make 3.00 L of a 0.0200 M solution.
Tuesday, October 8, 2013 by Riann

chemistry
The use of the British thermal unit (Btu {\rm Btu}) is common in much engineering work. (1 Btu {\rm Btu} = 1054J {\rm J}) A Btu {\rm Btu} is the amount of heat required to raise the temperature of 1 lb {\rm lb} of water by 1 ∘ F ^\circ {\rm F}. How many quads of energy ...
Monday, October 7, 2013 by Anonymous

Chemistry
How do I convert micrograms/mL to micromol/L? Thanks
Monday, October 7, 2013 by AA

chemistry
Why were we instructed to add distilled water to a metal nitrate solution? What purpose does the water serve in the experiment? Just to add volume so the probe can reach the solution?
Monday, October 7, 2013 by Evan

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