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the science which is intersted in studying theconversion of the liquid water to water vapour and vica versa in order to preserve
5 answers
asked by
khalid
1,449 views
A glass cup of orange juice is found to be POH of 11•40. Calculate the concentration of hydrogen ion in the juice?
9 answers
asked by
somto
3,123 views
A Ca(OH)2 solution has a pH of 8.0. Determine the values of [H3O+], [OH– ], and [Ca(OH)2] for the solution
4 answers
asked by
diana
3,860 views
72.1 g of steam is reacted with excess ethene (C2H4) according to the following reaction. Determine the maximum mass (in grams)
6 answers
asked by
naj
1,664 views
calculate the total amount of head absorbed (in kj) when 2.00 mol of ice at -30.0C is converted to steam at 140.0 C
4 answers
asked by
colonial
1,833 views
Give the formula of each coordination compound. Include square brackets around the coordination complex. Do not include the
4 answers
asked by
HELP!!!!!!!!
3,941 views
calculate the percentage of sulphur in sodium thiosulphate, Na2S2O2
6 answers
asked by
joshua
3,847 views
A solution is prepared by dissolving 4.9g of sucrose in 17g water. Calculate the boiling point, freezing point and osmotic
4 answers
asked by
humphrey
2,586 views
In a reaction Mg(s) + 2HCl(aq) → H2(g) + MgCl2(aq), 6.00 g of Mg was present at 0.00 min. After 3.00 min, 4.50 g of Mg
4 answers
asked by
Mohamed El amine
1,081 views
When magnesium metal (Mg) is burned, it forms MgO. How many moles of oxygen gas (O2) are needed to burn 20 moles of Mg? The
5 answers
asked by
nuzhat
2,700 views
What volume is produced when 10g of propyne is burnt in excess oxygen at S. T P
5 answers
asked by
Francis
1,381 views
Which information does the boiling point give about a substance?(1 point)
the types of electric charges between particles the
4 answers
asked by
help lol
1,539 views
5.0g of a mixture of caco3 and caO liberated 1.32g of carbon(4) oxide on strong heating .
what is the percentage of Cao in
5 answers
asked by
poppy👌🤔
1,445 views
how to determine the pH of a 200mL solution that contains 0.365g of dissolved HCl?
4 answers
asked by
mark
1,985 views
The ∆G° of vaporization for butane at 298 K and 1.00 atm is -2.125 kJ/mol. Calculate the pressure, in atm, of butane vapor in
5 answers
asked by
Emily
2,351 views
In one or two sentences, describe a scenario using the combined gas law in which changes occur in the pressure and temperature
5 answers
asked by
no
2,942 views
A 1.000 gram sample of the rocket fuel hydrazine (N2H4) is burned in a bomb calorimeter. The temperature rises from 24.62°C to
4 answers
asked by
Evelyn Genao
4,488 views
You are a workstudy for the chemistry department. Your supervisor has just asked you to prepare 500mL of 3M HCl for tomorrow's
7 answers
asked by
Lauren
4,670 views
A STP of a certain mass of gas occupies a volume of 800cm cube. find the temperature at which the gas occupies 940cm cube and
4 answers
asked by
Omotosho Silas Segun Ayobami
604 views
A is a solution containing 0.095 mol/dm3 of trioxonirate(v) acid solution.
B contains 13.5g if X2 CO3 1OH2 per dm3. using the
5 answers
asked by
poppy👌🤔
1,633 views
a gas at 10atm pressure occupy a volume of 10L at 300k it is allowed to expand at the constant temperature of 300k under
5 answers
asked by
Anonymous
1,690 views
the electronic configuration of element x 2 8 8 1 and y 2 7 and write the formula of the compound formed when they combine
7 answers
asked by
john
2,199 views
how much heat is required to convert 40g of ice at -10°c to steam at 120°c
1 answer
asked by
Kosgei Faith Jepchirchir
117 views
if the molar mass if an acid is 40.0g/mol and it's concentration in grammes per dm cubic (g/dm^3) is 200.0. find its
4 answers
asked by
poppy👌🤔
563 views
Describe how to correctly prepare 400 mL of 0.6 M NaOH starting from solid NaOH.
4 answers
asked by
david
1,849 views
25cm3 of 0.1 mole H2SO4 neutralizes 20.0cm3 of impure NaOH containing 3.0g of impure NaOH in 250cm3 Of a solution . calculate
3 answers
asked by
Basil salvation
409 views
What volume of hydrogen would be required to produce 0.400 mole of HCl at STP?
H2(g) + Cl2 (g) → 2HCl(g)
4 answers
asked by
Valeria
1,292 views
Wetlands are able to remove nutrients and chemicals from water as the water flows through the area. A developer is planning to
9 answers
asked by
oj
2,186 views
A is a solution of tetraoxosulphate (vi) acid, B is a solution containing 1.4g of potassium hydroxide per 250cm3.
using the table
4 answers
asked by
poppy👌🤔
1,431 views
if 50.0 g of KCl reacts with 50.0 g of O2 to produce KClO3 according to the equation, how many grams of KClO3 will be formed?
4 answers
asked by
Viridiana
4,055 views
Arrange the following 0.10 M aq. sol. in order of increasing pH.
KOBr, HOBr, LiOH, HBrO4, NaBrO4 (Ka for HOBr = 2.5 x 10^-9, Ka
3 answers
asked by
need help
363 views
Suppose that the microwave radiation has a wavelength of 12 cm . How many photons are required to heat 295 mL of coffee from
5 answers
asked by
luke
3,541 views
Calculate the hydrogen ion concentration, pH, POH, OH‐ in 0.02 H2SO4?
3 answers
asked by
somto
691 views
for how long must a current of 1.5 amperes be passed through an aqueous solution of a copper salt during electrolysis in order
2 answers
asked by
blessed
559 views
what is the chemical formula of magnesium trioxocarbonate
5 answers
asked by
Samuel
1,308 views
1. A volumetric pipet is stamped by the manufacturer with “TD 25 10 mL”. Explain what this means.
4 answers
asked by
mohammad
1,430 views
N2O4(g) + energy ⇄ 2NO2(g)
The system is at equilibrium, but then it is subjected to an increase in pressure. Which change will
19 answers
asked by
not vegan
2,351 views
the half time of a radioisotope is found to be 4.55 minutes. if the decay follow first order kinetics. what percentage of
4 answers
asked by
Linda Nnenna
2,172 views
Examine the unbalanced electrolytic reaction.
Li+(aq) + Zn(s) → Li(s) + Zn2+(aq) How many electrons are transferred in the
3 answers
asked by
madison
657 views
Assume that the balloon is filled with carbon dioxide gas at 20°C and standard pressure. Use the ideal gas law to calculate the
4 answers
asked by
madison
3,670 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
713 views
The difference samples A and B of Zinc oxide we're obtained from different sources when heated in a stream of hydrogen they were
6 answers
asked by
samba mambo
1,260 views
0.052 moles of a gas has a pressure of 1.32 atm at 127 degree C. Calculate its Volume at STP
3 answers
asked by
Nour
400 views
Calculate the volume of nitrogen that will be produced at S.T.P from the decomposition of 9.6g of ammonium dioxonitrate 3?
3 answers
asked by
Ọga mugu
703 views
Calculate the mass of water produced when 6.51 g of butane reacts with excess oxygen.
4 answers
asked by
Julianna
647 views
calculate the maximum volume of ammonia gas at stp which could be obtained by boiling 8dm(cube)of 0.651g solution of ammonia
3 answers
asked by
Anonymous
249 views
what volume of chlorine is required to produce 25.4grams of copper II chloride at 18 degrees celsius and 2.13 atm
3 answers
asked by
becky
1,217 views
Calculate the thiocyanate concentration at equilibrium if the irone (III) ion concentration is 0.23 M and the complex ion
3 answers
asked by
coolest
696 views
Consider the following equation: CO + 2 H2 → CH3OH △H rxn = -128 kJ
Calculate the amount of heat (in kJ) associated with
3 answers
asked by
s.
1,540 views
How can variation in hardness of water be determined in a laboratory?
How is the using of sodium carbonate disadvantageous?
3 answers
asked by
ocelli
760 views
H2+1/2O2=H2O(1)+285.8kj
6 answers
asked by
anbesa
2,481 views
500 cm3 of a gas is collected at 0 degree celcius and at a pressure of 72.0 cm of Mercury.
what is the volume of the gas at the
4 answers
asked by
poppy👌🤔
702 views
what is the ionic equation for the hydrolysis reaction of
[Al(H2O)6]Cl3
3 answers
asked by
nur izzati
1,193 views
what pressure would be required to compressed 7.75 litres of hydrogen atmosphic pressure to 5 litres (1atm =760 mmhg =760)
1 answer
asked by
clifford
331 views
calculate the total vapour pressure of mixture of methanol(64g) and ethanol(92g) at 298K given that the pure vapour pressure of
5 answers
asked by
ruth
1,132 views
a gas tank holds 2685 L of propane, C3H8 at 830 mm Hg. What is the volume of the propane at standard pressure
3 answers
asked by
angela
778 views
What is the standard heat of reaction (H0) for the combustion of ethane, C2H6(g), to form carbon dioxide gas and water?
2C2H6(
4 answers
asked by
thisfoolneedshelp
2,163 views
There are 5g of 131I left after 40.35 days. How many grams were in the original sample if its half-life is 8.07 days?
What is the
4 answers
asked by
malia
2,131 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
621 views
How many grams are there in 2.5 mol MgCl2?
4 answers
asked by
luna
898 views
IM TAKING MY UNIT 9 CHEMICAL REACTIONS UNIT TEST RN AND I AM SO LOST SOMEONE PLS SEND THE ANSWERS
4 answers
asked by
HELP PLEASE
1,769 views
Why is it important to make sure there are no air bubbles in the tip of a buret below the stopcock before using the buret to
3 answers
asked by
mohammad
1,135 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
967 views
what is the Aim of titration of sodium hydroxide with Tetraoxosulphate(IV)Acid
3 answers
asked by
Muhammad
624 views
what is the mass of 200 mL of glucose solution with a density of 1.15 g/mL ?
3 answers
asked by
Anonymous
306 views
12.5g of zinc trioxocarbonate (iv) znco3 were heated very strongly to a constant mass and the residue treated with excess
3 answers
asked by
Francis
611 views
A chemical reaction produces formaldehyde, with a chemical formula of CH2O. Carbon is in Group 4A, oxygen is in Group 6A, and
4 answers
asked by
HELP ME
1,702 views
Strontium chloride and sodium fluoride react to form strontium fluoride and sodium chloride, according to the reaction shown.
SrC
4 answers
asked by
j
879 views
For each reaction, show how electrons are gained and lost:
2Na (s) + Br2(l) 🡪 2NaBr (s) 2Ca (s) + O2(g) 🡪 2CaO (s)
3 answers
asked by
dawan
262 views
2Na + Cl2 - ?NaCI
In the reaction, sodium and chlorine combine to produce sodium chloride. In an instance when eight sodium
3 answers
asked by
.
348 views
Chemical properties of tetraoxosulphate(vi) acid
3 answers
asked by
Angel owa
187 views
How many grams of sulfosalicylic acid (mol wt = 254) are required to prepare 3%w/vsolution?
3 answers
asked by
solid
141 views
Bacl2+Na2CrO4 ----> BaCrO4 + 2Nacl
1 answer
asked anonymously
74 views
How is sulphur manufactured in a large scale
1 answer
asked by
jayce
335 views
Calculate pH of 6ml of 3M HNO3 diluted to 18 litres of water
1 answer
asked by
Frederick
375 views
how do you convert 7.5% w/v NaCI to mM
1 answer
asked by
homework
327 views
4.8g of Mg were burn in 3.2g of oxygen. The MgO produced at a mass of 8g what is the equation of the reaction
5 answers
asked by
makwin
2,093 views
how can i make 30 ml, 0.227 mol of hydroiodic acid from 50 ml hydroiodic acid of 57 wt% in water?
1 answer
asked by
Smit
433 views
1. based on the equation below, how many liters of water can be produced from 8.5 L (assume that hydrogen is in excess)
2H2(g)+O2
2 answers
asked by
holly
461 views
If 25.4 g of water initially at 20.0 C absorbs 115 cal heat what is final temp?
4 answers
asked by
Anna Baker
760 views
A 8.408 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 12.53 grams of CO2 and
4 answers
asked by
ALAN
1,120 views
empirical formula for
K 60.0% C 18.5% N 21.5% and P 7.5% I 92.5%
3 answers
asked by
Mar
785 views
how many grams of CO2 could be produced from 100.0 grams of CH4?
CH4 + 2O2 -> CO2 + 2H2O
2 answers
asked by
Clarissa
497 views
hw much 0.1N NaoH would u have added to 30ml of 0.1N Hcl at a equivalent point?
1 answer
asked by
Deborah
298 views
what is the net ionic equation for
AlBr3(aq) + 3LiOH(aq)
2 answers
asked by
esme
630 views
At 983 torr of pressure, 1.62 grams of a gas dissolves in 2.0L of water at 10'C. What mass of gas will dissolved in 2.0L of
1 answer
asked by
Jack
388 views
When a 8.45-mg sample of a compound containing carbon is burned completely, 18.1 mg of carbon dioxide is produced. What is the
4 answers
asked by
kai
4,465 views
Under the same condition temperature and pressure hydrogen diffuses 8 times as fast as gas y calculate the rmm of gas y the rmm
4 answers
asked by
Anonymous
1,443 views
calculate the mass at 15.0 L at NH3 at 27 digree Celsius and 900 mm hg?
4 answers
asked by
Tshering
2,024 views
consider equilibrium equation below
`Mg(NO3)2(aq) + 2Na(OH)(aq) <--> Mg(OH)2(s) + 2NaNO3 (aq) If NH3 is added, according to Le
2 answers
asked by
sam
505 views
What type of chemical reaction is this equation? CuO (s) + [2H+ + SO4 2-](aq) [Cu2+ + SO4 2-] (aq) + H2O (l)
1 answer
asked by
Anonymous
635 views
The pH or acidity of liquid is measured in pH, where pH is given by the equation pH=- log C, with C being the concentration of
2 answers
asked by
Sara
458 views
lactic acid is the avid responsible for the sour test in spit milk. on the basis of combustion analysis, it's percentage
2 answers
asked by
amy
600 views
So we did an experiment where we mixed Cacl2 and NaCl and then found the mass of the precipitate. Then we compared it to
2 answers
asked by
Amy
626 views
Draw a well diagram of the set up of the aparatus that can be used to show that ammonia gas can burn in oxygen
Write the equation
2 answers
asked by
Taufiki Hazard
877 views
How many phases and components are present in a saturated solution of Na2so4 with excess of solid is present at equilibrium with
2 answers
asked by
buhle
592 views
You vaporize a liquid substance at 90.0 °C and 795.0 mmHg. The volume of 0.548 g of vapor is 237 mL. What is the molecular
1 answer
asked by
Anthony
459 views
You have a tank of argon gas at 19.80 atm pressure at 19°C. The volume of argon in the tank is 50.0 L. What would be the volume
2 answers
asked by
Anthony
564 views
some pollutants in natural waters such as heavy metal and organic compounds would be classified as having low solubility.what
2 answers
asked by
Laura
483 views
what volume of carbondioxide is produced when 10g of Hcl reacts completely with caco3
caco3+2HCl=cacl2+H2o+Co2 moles
2 answers
asked by
mohammad
537 views
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