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Chemistry
Page 91
Questions (96,939)
Explain which atom of the following pair have the smaller ionization energy: As, I
1 answer
asked by
Emily
312 views
Is it true that: An isotope has a different number of neutrons than protons in the nucleus of its atom.
1 answer
asked by
Amy
363 views
Calculate the concentration of OH-(aq) in a solution which [H+] = 100 x [OH-]. Thank you.
1 answer
asked by
Simone
340 views
Hello,
I don't really know where to begin with this question. Thanks in advance! Consider the mixing of 10.0 ml of 0.25M K2SO4
1 answer
asked by
Natalie
429 views
Ni+2 + SCN- <--> Ni(SCN)+
A reaction flask initially contains .0006 Ni+2 and .00002 M SCN-. AFter equilibrium is reached, it is
1 answer
asked by
kappie
419 views
For the weak acid HX, what is the pH of a 0.10 M solution if the acid is 4.0% ionized?
1 answer
asked by
JC
338 views
How many ml of 1M HCl would you need to make 50.0 mL of 0.125M solution?
1 answer
asked by
Danielle
257 views
we have 159ml of CO2 at 38.9 C and 92.4 kPa. if the conditions change to 64.9 C and 174 kPa, what is the volume of the gas?
1 answer
asked by
Nicole
225 views
How many ml of 1M HCl would you need to make 50.0 mL of 0.125M solution?
3 answers
asked by
Danielle
287 views
Pb(C6H2O2)2+KCl= ???
1 answer
asked by
Artie
294 views
what was the first sample in the ChemQuandry and where is it used
1 answer
asked by
Jessica
265 views
Why AgSCN is selectively precipitated before the formation of FeSCN2+?
given that Ksp of AgSCN = 1x10^-12 and Kinstab of FeSCN2+
1 answer
asked by
anna
402 views
How much energy is gained by a 40.8g sample of water whose temperature increases from 22 degrees celsius to 35 degrees celsius
1 answer
asked by
Elizabeth
383 views
What is the balance equation for:
(NH4)3 + MgCl2
1 answer
asked by
Adrionna
384 views
Is there a reason for why you're allowed only three significant figures for molar masses?
1 answer
asked by
Chem101
357 views
What is the osmotic pressure(in torr)of a 0.0015 M NaCl at 25 degrees celsius? (R= 62.4 L*torr/mol*K) Please show me how to set
1 answer
asked by
georgia
409 views
If a solution is made by mixing 50.0 moles of KOH to 3.4 kilograms of water, what is the solutions molality?
1 answer
asked by
Samuel
380 views
If a solution is made by mixing 50.0 moles of KOH to 3.4 kilograms of water, what is the solutions molality?
1 answer
asked by
Samuel
343 views
How do you dilute 100mL of 20ppm Fe3+ to 1,2,4,6,8 ppm, 50mL each?
1 answer
asked by
Jerry
398 views
Decomp. of H2O2 with Catalase.I am trying to use the Arrhenius equation in my coursework, but i am struggling to get it to work.
1 answer
asked by
Suriya
387 views
If the surface area of a liquid is increased will the rate of evaporation increase?
1 answer
asked by
sabrina
358 views
The Ka value for ethanoic acid is 1.8x10^-5, what would be the pH of a 2.0x10^-2 M solution of ethanoic acid?
1 answer
asked by
Rachael
433 views
If I have 6 mol of N2 and 12 mol of H2 to yeild ammonia, which chemical is in excess and by how much?
1 answer
asked by
Darcy
327 views
Why is it desirable in the method of back-titration to have a considerable amount(more than 10mL) of acid added in excess?
1 answer
asked by
E
344 views
Cr(OH)3<-->Cr+3+3OH-
1. which direction will equilibrium change if CrCl3 is added, why? 2. which direction will equilibrium
1 answer
asked by
kappie
354 views
Cr(OH)3<-->Cr+3+3OH which direction will equilibrium change if CrCl3 is added and why. which direction will it change if HCL is
1 answer
asked by
apple
361 views
the weak acid HQ has a pKa of 4.89. calculate the [OH-] of .85 M HQ.
1 answer
asked by
Anonymous
415 views
the pH of a .3 M solution of a weak base is 10.72. what is the Kb of the base?
1 answer
asked by
Anonymous
300 views
what is the pH of .115 M methylammonium bromide?
1 answer
asked by
Anonymous
393 views
What would the equation be for the reaction between potassium permanganate and cyclohexene. I know it's a oxidation reaction but
1 answer
asked by
Lizzy
434 views
What volume at nitrogen would be required to react with 0.100g of hydrogen to produce ammomia?
1 answer
asked by
i dont know how to set it up!
351 views
(A) is a solution of hcl (b)is a solution of koh titrate against b8 record your titre values as follows
1 answer
asked by
Kc luckydony
380 views
Calculate the mass of sodium bicarbonate needed to neutralize 3.0 mL of 3.0 M HCl. Show your work.
1 answer
asked by
Dan
328 views
What is the molar mass of 4.56grams of Benzoic Acid?
1 answer
asked by
sarah
343 views
1.278 mL of water at 10°C was placed in a 3.0 L container that was sealed and evacuated. Then, 3440 J of heat was added to the
1 answer
asked by
lisa
423 views
would on mole of nitrogen gas have the same volume as 32g of oxygen gas? Explain.
1 answer
asked by
Mary
303 views
Can someone explain to me in simple terms what is relative mass and absolute mass? And how to calculate them too. Thanks.
1 answer
asked by
OLGA
377 views
How many grams of CH3COOH are present in 2.5^3 of vinegar. Also, what is the formula needed to solve? Thanks!
1 answer
asked by
Steven
363 views
which of the following has the largest radius
A. CI- B. S2- C. K+ D. Ar E. Ca2+
1 answer
asked by
emily
416 views
If 15.0ml of a 6.0M HCl solution is diluted to 75.00ml, what is the molarity of the diluted solution?
1 answer
asked by
jake
428 views
The Molarity of a solution that contains 50.0g BaF2 in 700.0ml solution is:
A. 0.41 B. 0.29 C. 2.5
1 answer
asked by
Eric
341 views
The oxidation state for solid iron is 0
True False
1 answer
asked by
Kevin
379 views
How many moles of ethanol is contained in 250.0 ml of a 1.90M ethanol solution?
A. none of these B. 7.60 C. 475 D. 0.475
1 answer
asked by
Philip
345 views
How many moles of ethanol is contained in 250.0 ml of a 1.90M ethanol solution?
A. none of these B. 7.60 C. 475 D. 0.475
1 answer
asked by
MIchelle
368 views
How many moles of ethanol is contained in 250.0 ml of a 1.90M ethanol solution?
A. none of these B. 7.60 C. 475 D. 0.475
1 answer
asked by
Lily
343 views
Determine the density (in g/mL) of a liquid given:
A beaker was weighed at 90. g, then 413.5mL of liquid was added and the new
4 answers
asked by
Oscar
416 views
13.1 + (19.32 - 8) = ? I know the answer is 24.42 but it says the answer has to be to the correct number of significant figures.
1 answer
asked by
Oscar
395 views
13.1 + (19.32 - 8) = ? I know the answer is 24.42 but it says the answer has to be to the correct number of significant figures.
1 answer
asked by
Oscar
376 views
13.1 + (19.32 - 8) = ? I know the answer is 24.42 but it says the answer has to be to the correct number of significant figures.
1 answer
asked by
Oscar
405 views
At 25C and 1.0 atm, 0.25 g of a gas dissolves in 1.00 L of water. What mass of the gas dissolves in 1.00 L of water at 25C and
1 answer
asked by
BRIT
349 views
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