60,135 results, page 99
How many joules of heat are required to raise the temperature of 550 g of water from 12°C to 18°C
How many joules of heat when a 640 g piece of copper cools from 375° C to 26° C
What type of alcohol is used in the production of alcoholic beverages?
how much grams of cao is produced by oxidation of 1gm of calcium
How many moles of acetic acid are present in 10.00 mL if the concentration is 0.500M HC2H3O2?
Balance by partial methods P4 + hno3 = h3po4+ no2+h2o
A compound contains 84% carbon and 10% hydrogen.find the emperical formula.
vapour density of gas is 11.2 volume occupied by 22.4gms at STP?
If 5.00 mL of 3% H2O2 is decomposed, how many mL of gas will be produced at 1.01 bar and 25C?
For the combustion of 100. gm of methane, how much heat would be generated?
Calculate the amount of hydrochloric acid in 25cm3 of 0.100M HCl
If you have light that has a frequency of 2.88 x 10 to -9 power Hz, what is the wavelength? I don't know how to do this and what formula to use.
the color change at the endpopint should persist for 30 second why
How do halogens (Cl2, Br2, I2) react with halides (Cl-, Br-, I-)? Can we explain this reactivity?
What is the mass percent of nitrogen in ammonium carbonate, (NH4)2CO3?
The density of an elemental gas is 2.14 kg/m3 at STP. What is its approximate molecular weight?
Name a metal which is found in liquid state at ordinary temperature?
How much KNO3 will dissolve in 200ml of water at 50 degrees Celsius?
List Sn , Sn2+, Sn4+ in order of decreasing ionization energy
How can I tell from a graph of temperature vs. time if a reaction is endothermic or exothermic?
Why does the temperature in exothermic reactions increase, reach a maximum, and then decrease?
How many ml of water must be added to 40.0 ml of 2.50 m koh to prepare a solution that is 0.212 m?
Ion flame test Why is it important to not let the wooden splint burn ?
Calculate the energy difference for the transition of n=6 to n=2 for 1.00 mol of hydrogen atom?
How many grams of Ca(OH)2 can be dissolved in 550mL of a .0500 M NaOH solution. Ksp - Ca(OH)2 is 5.5 x 10-5
Does adding a proton to lithium-7 make it a positively charged ion?
Determine the number of grams of water in 7.00 g of copper(II) sulfate pentahydrate.
If 0.400ml CH3CO2H and 0.200ml of 0.100M NACH3COO What is the pH of the resulting solution.
How to I find the spectator ions of BaCl2+K2SO4->2KCl+BaSO4
find the percentage by mass of nitrogen present in (NH4)2SO4
how do you go about to find the grams that will react with 90g acetic acid
The solubility of Na3(PO4) is 0.025 M. What is the Ksp of sodium phosphate?
Which element's 4+ ion would have the following electron configuration? [Kr]4d^10
Chemistry,what is the k.e of 4 moles of nitrogen gas at 127 degree centigrade?
Predict the Order of increasing bond length for (i) H2(g) (ii) I2(g) (iii) F2(g) I don't know how I should know
What is the frequency of the photons emitted by hydrogen atoms when they undergo transition from n=4 to n=3?
2.0 gram of C2H4 is reacted withO2. What mass of water is produced?
Explain what would happen if a saturated solution of kno3 at 50°c is heated
CO(g) effuses at a rate that is ______ times that of Xe(g) under the same conditions.
What will happen if 100g of NaCl is placed in 200mL of water at 70C
How many miles of oxygen would it take to react with 1.0 moles of magnesium
How many joules are needed to change 163.34 g of water at 54.1 °C to steam at 100 °C?
Calculate the molarity of a 6% solution of ammoniun nitrate of density 1.025 g/mL
Which among hydride, methyl or phenyl shift is the most preferred?
Report the preparation of stock solution of 0.04M of sulphoric acid
report on the preparation of 0.004M stock solution of ethanoic acid
How many grams do 6.2×1024 atoms of argon weigh? Answer in units of g.
How many molecules are in 0.0700 mol NH3? Answer in units of molec.
How many grams of aluminum sulfate are produced if 15.7 g Al reacts with excess CuSO4?
What happens if we add 200 mg of calcium hydroxide in 100 g of water at 20 ° C?
Ans me plxxx Identify the hydrogen bonding in DNA and ice......
How does salt affect the boiling point of water? (in simple words)
Determine the number of grams present in 3.11x 10^23 atoms of water
Which of the following has the lowest conductivity when dissolved ? F2, H2O, MgO, or LiCl
In interhalogen compounds of the type Ab5 and AB7, B is invariably flourine,why ?
Why do argon and flourine not form compounds like Xenon Flourides?
in paramagnetic ions all the bonds formed between Mn and O are covalent,why?
the ka value of 0.001moldm-3 solution of a weak acid is 1.6*10-6 calculate the ph and the pka
concentration of H30+ in 0.0250 moldm-3 aqueous epuation of HCL
volume of 0.5 N sodium hydroxide required to neutralize 20 ml of 0.1 N acetic acid ?
At what pressure would 0.150 mole of nitrogen gas at -23.0^o C occupy 8.90 L ?
If the density of a gas is 1.2g/L at 745.torr and 20 Celsius, what is the molecular mass?
Calculate the following and write your answer in scientific notation 6.6 x 10^6 (8.8 x10^2) x (2.5 x 10^3)
find the concentrations of H+, HCO3-, CO3 2- in a 0.025M in H2CO3 solutions
The formula for rust can be represented by Fe2O3. How many moles of Fe are present in 27.6 g of the compound?
A 0.10M solution of a certain monoprotic weak acid has a pH of 2.44. Calculate Ka.
How is 4FeS2 + 11O2 = 2Fe2O3 +8SO2 a single replacement reaction?
How much concentrated 12 M HCl is needed to prepare 200 ml of a 2.5 M solution?
Can you determine the limiting reactant just by comparing the masses of the reactants?
what mass of NaCl do you need to make a 500mL of a 0.10M solution?
C + HNO3 = CO2 + NO2 + H2O oxidation, reduction and balancing
calculate the solubility of PbI2 in 0.0123M CaI2. Ksp=6.81x10^-9
Determine the specific mass of fluorine (F2) in g/cm³ in 20°C and 188 torr
How do I make a 500ml amount of a 0.3% aqueous solution of chlorine dioxide
What is the oxidation number of chlorine in Al(ClO4)3? I don't understand this question, can someone help? Thank you!
Net Ionic Reaction and molecular Equations of Ca3(PO4)2
How many grams of NaC2H3O2 are needed to prepare 350. mL of a 2.75 M solution? i got 79.0 ??
Determine [OH-] of a solution that is 0.135 M in CO3^2-. I got 0.00532.
Why is it important to use the same pipet through out the experiment?
Highlights the basic points in lewis and langmuir theory of electrovalency.
what is the molarity of the solution comtaining 2.5g of acetic acid in 75g of benzene
A nickel is about 2 millimeter thick or 2/1000 of a meter. How many nanometers is this?
What is the yield of the synthesis of ammonia to 400° C and 500 atm of pressure?
how would you prepare pure dry crystals of potassium trioxonitrate?
0.717g of potassium dihydrogen phosphate in 500ml concentration in ppm
Calculate the boiling temperature of a 0.50 M solution of sucrose. Assume that the concentration is 0.50 m.
What mass of sodium phosphate is needed to produce 75.00 g of solid product?
Will 1 L of 1 M NaCl contain more chloride ions than .5L of 1M MgCl2? Explain.
What is the main factor driving the difference in the spontaneity of the three reactions Cl^2,Br^2, and l^2?
A type of heat that involves no contact at all would be ?? Radiation
Calculate the de Broglie wavelength (in pm) of a hydrogen atom traveling 450 m/s .
Zn (0.85M) + Cu (1.10M) in an electrochemical cell. what is the conc of the zinc ion?
Balanced chemical equation for H2O + SO2 --> O3 + H2S + SO3?
How many grams of MgCl2 would be required to make 440 g of magnesium ?
what about a mixture whose specific rotation was found to be -9.2 degree?
What is mass in grams of a pure iron cube that has a volume of 4.10 cm3
How many grams of cuso4.5h2o are require to prepare 100ml of 500ppm cu
calculate the poh of 1 dm^3 of naoh solution containing 4 g of sodium hydroxide
The measured density oe He at NTP is 0.1784g/l.what is the weight of one mole?
would someone be willing to help me fill out my study guide