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chemistry
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state four limitations of depression of freezing point ?
I need answers pls av been searching through google for the
4 answers
asked by
promise
622 views
the solubility product of lead(ii)sulphate in water is 1.6x10^-8 mol2 dm^-6. calculate the solubility of lead(ii)sulphate in
1 answer
asked by
frank
1,093 views
A mixture of 0.2mole of alcohol of A and 0.5 mole of alcohol B has a total vapour pressure of 40mmHg at 298K. if the mixture
2 answers
asked by
Best
575 views
what are the limitations of depression of freezing point
2 answers
asked by
ruth
967 views
At s.t.p a certain mass of gas occupies a volume of 790cm 2. Find the temperature of at which the gas occupies 1000cm 3 atm has
2 answers
asked by
Cherish
552 views
Suppose that the microwave radiation has a wavelength of 12 cm . How many photons are required to heat 295 mL of coffee from
3 answers
asked by
luke
1,533 views
Assuming an efficiency of 30.80%, calculate the actual yield of magnesium nitrate formed from 147.4 g of magnesium and excess
3 answers
asked by
skye
475 views
Assuming an efficiency of 30.80%, calculate the actual yield of magnesium nitrate formed from 147.4 g of magnesium and excess
2 answers
asked by
skye
501 views
Assuming an efficiency of 30.80%, calculate the actual yield of magnesium nitrate formed from 147.4 g of magnesium and excess
3 answers
asked by
skye
522 views
52,g of octance burns in oxygen
1 answer
asked by
alwaan
353 views
when ditule solution of 20 valume hydrogen peroxide solution was heated the total valume of axygen collected was 120cm in just
1 answer
asked by
khadija
326 views
3.0g of a mixture of potassium carbonate and potassium chloride were dissolve in a 250cm standard flask. 25cm of this solution
2 answers
asked by
CEO
618 views
What mass of iron(III) oxide is produced when 8 g of iron metal reacts completely with oxygen gas?
2 answers
asked by
panda
575 views
if the pH of a solution is 6.1, what is the concentration of H+ ions in that solution?
2 answers
asked by
Anna
506 views
Calculate the molar solubility of AgBr in 0.15M NaBr at 25 degree celcius (Ksp of AgBr= 5.0*10¤-3 mol¤2dm¤-6 at 25 degree
3 answers
asked by
Maballs
723 views
3. Determine the sign of both q and w for the following phase change at 25 °C and 1.0 atm:
H2O(l) → H2O(g)
3 answers
asked by
kelly
350 views
what volume of dry oxygen gas measured at stp will be produced from the decomposition of 3.50 of potassium trioxochlorate (v)
2 answers
asked by
favour
564 views
If 350cm^3 of hydrogen diffuses in 50seconds ,how long will it take 490cm^3 of a gas Z to diffuse under the same condition (H=1
1 answer
asked by
professor Nasir Al sudani
334 views
can someone show me an example in finding the theoretical plate by using tangent line method and the data of a graph?
1 answer
asked by
mike
326 views
H2SO4(aq)+H2O(l)→H3O+(aq)+HSO4−(aq)
solve
2 answers
asked by
jessica
653 views
CN−(aq)+H3O+(aq)⟵−→−H2O(l)+HCN(aq)
2 answers
asked by
jessica
944 views
how to prepare a 250 mL solution of .15 M K2SO4 with a volumetric flask
2 answers
asked by
Danny
502 views
Which of the following is not a true statement about ATP
a. ATP consists of ribose, adenine, and three phosphate groups b. ADP is
12 answers
asked by
welp-oh-dear
11,650 views
1. Harry titrates vinegar with 0.952 M NaOH. The sample was 25.75 mL of vinegar, and it took 19.85 ml of 0.952 M NaOH to reach
1 answer
asked by
tori
468 views
Which choice identifies the compound’s structural formula, and what information does the structural formula provide that the
3 answers
asked by
destyn
492 views
what is the quantity symbol of kelvin? i have this question on my homework sheet and the multiple choice answers are m, T, t, or
1 answer
asked by
malika
365 views
Which substance has the highest particle mobility?
water at 25 °C because liquid particles are the most mobile and mobility
4 answers
asked by
Anonymous
1,361 views
What is true about kinetic energy and the mobility of solid, liquid, and gas particles?
The average kinetic energy of the
4 answers
asked by
Anonymous
2,331 views
What is w when 3.93 kg of H2O(l), initially at 25.0 ºC, is converted into water vapour at 157 ºC against a constant external
7 answers
asked by
Shay
721 views
How many moles of O atoms are in 8.65 mol of CaCO3, the chief constituent of seashells??
1 answer
asked by
stephanie
416 views
The reaction 2ClO2(aq)+2OH−(aq)→ClO3−(aq)+ClO2−(aq)+H2O(l)
3 answers
asked by
Anonymous
1,076 views
need help with questions related to rate. i pasted the two links below. any help would be appreciated!!
gyazo.com/425bad92c5dfaae
7 answers
asked by
lana
514 views
FeCl3 +MgO-Fe2O3+MgCl
1 answer
asked by
ttoollin
455 views
When 0.08 moles of ammonium sulfate
((NH4)2SO4) are dissolved in enough water to make 298 milliliters of solution, how many
2 answers
asked by
Sandra
567 views
A solution of naphthalene (C10H8, 128.17 g/mol) in benzene (C6H6, 78.11g/mol) has a freezing point temperature of 3.41 C.
2 answers
asked by
chemnerd
1,009 views
olid silicon (Si) and solid magnesium chloride (MgCl2) form when silicon tetrachloride (SiCl4) gas reacts with magnesium metal
2 answers
asked by
rigoberto
730 views
why stoichometry is important in chemistry
1 answer
asked by
Alazar
320 views
The pH of a 0.25 M aqueous solution of hydrofluoric acid, HF, at 25.0 °C is 2.03. What is the value of Ka for HF?
4 answers
asked by
Anonymous
2,241 views
Would benzene (C₆H₆), a nonpolar solvent, dissolve CH₄?
2 answers
asked by
Cadie
676 views
which is limiting reactant
1 answer
asked by
meron
300 views
what mass of h2o is formed?
1 answer
asked by
meron
315 views
If a 0.500 mole of carbon disulfide reacts with oxygen completely, what would be the total volume of the products at STP?
CS2(l)
2 answers
asked by
Tiffany
716 views
What volume of oxygen gas will be produced when 13.5 g of potassium chlorate is decomposed at STP?
2KClO3(s) → 2KCl(s) + 3
3 answers
asked by
Tiffany
742 views
If 0.81 grams of magnesium oxide are formed, how many grams of oxygen reacted
2 answers
asked by
kasandra
964 views
Is 3Fe + 2O2 → Fe3O4 ΔH = -1120.5kJ an exothermic or endothermic equation
3 answers
asked by
brian bueno
1,495 views
A 0.12-mole sample of nitrogen gas occupies a volume of 2.05 L
What is the volume of 0.31 mol of nitrogen gas under the same
1 answer
asked by
sidhani
407 views
A 0.86-mole sample of C6H12O6 was placed in a vat with 100 g of yeast. If 39.6 grams of C2H5OH was obtained, what was the
4 answers
asked by
jessica
1,293 views
which process uses galvanic cell? A. lead storage B. refining of petroleum C. electrolysis of fused sodium chloride D. hall's
4 answers
asked by
Betty birhanu
477 views
A piece of Zinc was added to 100cm³ of 0.2M of hydrochloric acid. After effervescene had stopped. 30cm³ of the resulting
2 answers
asked by
Abdulramon
871 views
help me pls
50.00 mL of 0.25 M HClO4 mixed with 50.00 mL of 1.00 M HCl. Determine the PH and poh ?
1 answer
asked by
muhammed salaudeen
344 views
Represents all structures for alkenes and cycloalkenes with formula C6H10. Indicate which of the structures represent geometric
1 answer
asked by
Elena
339 views
If 100 grams of a liquid completely fill a 200 mL bottle, what is the density of the liquid?
2 answers
asked by
elias
527 views
What is the molecular orbital bond order for OF^-?
Is the correct answer 1? 0.5(10-8) = 1 10 bonding electrons and 8 anti-bonding
1 answer
asked by
Anonymous
275 views
To what temperature should the device above be heated to remove 1.1×10−4M/s of CO2 ? Assume an activation energy of 1.1
1 answer
asked by
vasantha
204 views
A chemical reaction for the production of C and D by the reaction of A and B is shown below:
3 A+ 4 B⟶C+ 2 D Assuming the
1 answer
asked by
vasantha
233 views
Calculate the volume (in mL) of 9.0M H2SO4 that you would need to convert 0.070 moles of KAl(OH)4 to K2SO4 and Al2(SO4)3
3 answers
asked by
Kalee
377 views
The rate constant for a first order reaction (based on the concentration of the single reactant) at 27∘C is observed to be
1 answer
asked by
vasantha
336 views
A laundry can purchase soap containing 30% water for a price of $0.30/kg FOB the soap manufacturing plant (i.e., at the soap
3 answers
asked by
qqwp
1,452 views
The molar heat of vaporization of water is 42 kJ/mol. How much energy is released by the condensation of 3.0 g of
water?
3 answers
asked by
jay
486 views
Calculate the heat required to convert 175 grams of ice (at the melting point) completely to steam (at the boiling point)
3 answers
asked by
Anonymous
1,052 views
Calculate the number of mole from calcium chloride (ca cl2) that canbe obtaned 60g of calciumtrioxo corbonata )(ca co3) presence
3 answers
asked by
MUJAHEED
227 views
A saturated solution of barium chloride at 30 °C contains 150 g water. How much additional barium chloride can be dissolved by
1 answer
asked by
tida
493 views
In a magnesium oxide experiment
Describe the effect of the following factors, whether decrease, increase, or has no effect on the
4 answers
asked by
k
725 views
Copper is one of a group of metals called the coinage metals. How many atoms of copper (Cu) are in a pure copper coin weighing
4 answers
asked by
chickens
1,499 views
Orbital diagram for Mo²⁺. What element is it isoelectric with?
1 answer
asked by
luisa
320 views
how many nutrogen atoms are present in 25.00g of N2O5
1 answer
asked by
fatima
290 views
50.4g CaBr2 to moles
2 answers
asked by
jay
597 views
A gas cylinder is filled with 29.01 g of Ne at a pressure of 55.1 inHg and a temperature of 656°C. What is the volume of the
1 answer
asked by
Sparta
269 views
How much water to be added to 450 ml of a solution 0.5 M to obtain a concentration 0.30 M?
3 answers
asked by
meet
233 views
which one has the minimum bond angle h2o h2s nh3 nf3
3 answers
asked by
rashid ch
725 views
Determine the specific heat of a metal from the following data. A 75 g piece of the metal at 100.0 C was placed into an ice
3 answers
asked by
lori
626 views
A piece of lead having a mass of 200.0 g and a temperature of 100.0 ˚C is placed in a cup of water initially at 22 ˚C. After
2 answers
asked by
lori
887 views
A 135 g sample of ice is in a freezer at -21 ˚C. It is removed from the freezer and allowed to melt and the resulting water
1 answer
asked by
lori
339 views
using the provided models of periodic tabel or models o periodic table trends, consider the propties given for the new element
1 answer
asked by
wade
295 views
Calculate the H for the following reaction
1 answer
asked by
Mary Archipova
184 views
What indicator would be used if we were titrating with HCl in the buret and NaOH in the flask since phenolphthalein is not
2 answers
asked by
Anonymous
723 views
For the reaction 2Na + Cl2--> 2NaCl , how many grams of Cl2 are required to react completely with 4.00 g Na?
a 71.6 g b 6.09 g c
3 answers
asked by
jayden
872 views
why are the reductants' electrode potential values negative in the electrochemical series?
1 answer
asked by
renjun huang
145 views
. The Haber process for the synthesis of ammonia is kinetically and thermodynamically controlled.
N2(g) + 3 H2(g) f 2 NH3(g) for
4 answers
asked by
Jay
553 views
The specific heat capacity of zinc is 0.386 J/g ºC . How many joules would be released when 268 grams of zinc at 96.0 ºC were
2 answers
asked by
diane
781 views
What mass of copper, with a specific heat of 0.385, can be heated from 20° C to 136 by the addition of 12,350 Joules of heat?
1 answer
asked by
diane
216 views
Which of the following gas samples would be most likely to behave ideally under the stated conditions?
3 answers
asked by
lol
906 views
How much energy in form of heat is required to convert a 10.0-g sample of ice initially at -5.00C to steam at 120C ? Specific
1 answer
asked by
hamda
399 views
A weather balloon was filled with helium to a volume of 25L at STP. What volume will it have when it rises to an altitude where
4 answers
asked by
Tasha
802 views
What is the partial pressure of O2 in the lungs if the atmospheric pressure (total pressure) is 755mmHG, the PN2 is 561mmHg,
4 answers
asked by
Tasha
972 views
how many grams of sodium hydroxide, NaOH, are present in 1.50*10^24 molecules of sodium hydroxide?
3 answers
asked by
n
286 views
At what tempeture NH3 and KNO3 have the same solubility?
3 answers
asked by
Tatiana
496 views
10.0 grams of octane are burned in a bomb calorimeter containing 2.00 x 10^2g H2O. if the water temperature increases from from
3 answers
asked by
peytan
640 views
For the reaction C + 2H 2→ CH 4 , how many moles of hydrogen are required to produce 14 grams of methane, CH 4 ?
1 answer
asked by
Anonymous
384 views
a)predict whether a 2.0mol/L solution of ammonia chloride will be acidic basic or neutral
b) calculate the pH of a 0.20 mil/L
2 answers
asked by
lucy
478 views
A solution of dibasic acid H2X contains 12.60gr of acid per litre, 10cm^3 of this acid solution required 20cm^3 of 0.1M
4 answers
asked by
Paccy
980 views
The equation demonstrates a reaction of sodium chloride and fluorine.
2NaCl + F2 → 2NaF + Cl2 In order for the reaction to
3 answers
asked by
maya
1,399 views
dr. bob 222 the chemistry KING, would you pls help 🥺
If you mix 8.1 g of HCl in enough water to make 0.7 L (700 mL) of
5 answers
asked by
wanda
192 views
compare the process of dissolving sugar in water to the process of dissolving table salt?
1 answer
asked by
Wasuk
203 views
at 90 degrees C, 60g of KCl is dissolved in 100g of water. is this solution saturated, unsaturated or supersaturated
2 answers
asked by
jessica
982 views
A buffer is prepared by dissolving 0.0250 mol sodium nitrite in 250 mL of 0.0410 M
nitrous acid. Assuming no volume change from
7 answers
asked by
Anonymous
621 views
At what Kelvin temperature will 25.7 grams of oxygen occupy a volume of 13.5 L at a pressure of 650. torr?
3 answers
asked by
jaira
346 views
1.577 moles of AgNO3 has density of 1.220 g/mol. what is it's molarity?
1 answer
asked by
Yeabsira
137 views
what's the cell potential of a copper electrolytic cell if both electrodes are copper? (the e0 value of the copper reaction is
3 answers
asked by
shim sooryeon
338 views
what is the Aim of titration of sodium hydroxide with Tetraoxosulphate(IV)Acid
3 answers
asked by
Muhammad
630 views
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