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Chemistry
Page 7
Questions (99,391)
Why is the second derivative of a titration curve more accurate method to determine endpoints and equivalence points than the
4 answers
asked by
tevon
8,676 views
The Henry's law constant for CO2(g) in water at 25 °C is 29.4 bar·M–1. Estimate the concentration of dissolved CO2(g) in a
5 answers
asked by
Matt
8,514 views
What is the mass of 3.01 x 10^22 iron (II) ions, Fe^2+?
5 answers
asked by
Syndra
3,406 views
Calculate the percent ionization of a 0.15 formic acid solution in a solution containing 0.11 potassium formate.
I have the
5 answers
asked by
redgy
3,085 views
A sample of a hydrate of CuSO4 with a mass of 250 grams was heated until all the water was removed. The sample was then weighed
5 answers
asked by
cam
3,672 views
The equation for burning C2H2 is
2C2H2(g) + 5O2(g) ⎯→ 4CO2(g) + 2H2O(g) a. If 15.9 L C2H2 react at STP, how many moles of CO2
5 answers
asked by
rob
3,633 views
Does anyone have the answers for Chemistry B Semester Exam? =)
14 answers
asked by
hello
3,438 views
10cm3 of propane was sparked with 60cm3 of oxygen at Stp.What is the volume of residual gases after the reaction is cooled.
5 answers
asked by
Zino
1,686 views
Describe how you can prepare crystals of sodium nitrate starting with 200cm of 2M sodium hydroxide
6 answers
asked by
Anonymous
1,132 views
Which reactants could be used safely to prepare potassium chloride?
1. aqueous potassium hydroxide and dilute hydrochloric acid
4 answers
asked by
Marrion
1,992 views
How would you prepare 250 mL of a 10% (w/v) KCl solution? (KCl=74.6 g/mol)
4 answers
asked by
sea
2,992 views
How many grams equal 6.3 mol of N2?
4 answers
asked by
pinky
1,213 views
3 moles C6H12O6 in 100 ml equals what molarity?
7 answers
asked by
Katie
1,825 views
Sea water contains an average of 1.08 x 10^3 ppm of Na+ ion. Calculate the molar concentration of Na+ given that the average
4 answers
asked by
marie
6,015 views
What would you expect to see if you performed the chemical reaction shown below? 2H2O2 —> H2O(l) + O2(g)
- solid precipitate
5 answers
asked by
Bri
2,592 views
A 25.00mL sample of 0.100M HC2H3O2 is titrated with 0.100M NaOH. What is the pH after 25.00mL of NaOH have been added? Ka
5 answers
asked by
Leaf02
897 views
In the chemical reaction where 0.1 M of N2O4 (g) is converted to 2NO2 (g), what are the concentration values of NO2 (g) in the
7 answers
asked by
Anonymous
1,890 views
does anyone have the answers for Calculating mass quick check?
1. Which option correctly describes the reactants and products of
10 answers
asked by
Anonymous
6,426 views
consider the equation for the following reaction at equilibrium. X+Y<-->2Z+heat the concentration of the product could be
5 answers
asked by
Jazmin F.
3,317 views
Calculate the mass of silver deposited when 0.2A of electricity is passed through a silver chloride solution for 2 hours, given
4 answers
asked by
SUMALIA
581 views
H2(g) + I2(g) 2 HI(g)
The forward reaction above is exothermic. At equilibrium, what happens if I2 is removed from the reaction
4 answers
asked by
student
3,294 views
Calculate the xolubility of calcium sulfate in 0.010 mol/L calcium nitrate at SATP
CaSO4 ==> Ca^+2 + SO4^= Ca(NO2)2 ==> Ca^+2 +
7 answers
asked by
Dustin
2,493 views
Using this redox equation:
Mn(OH)2(s) + MnO4-(aq) → MnO42-(aq) When the equation is balanced with smallest whole number
7 answers
asked by
Addam
5,816 views
Cobalt ions form complex ions with water and chloride as shown in the reaction. The left side of the reaction is pink, and the
4 answers
asked by
Cc22
895 views
How many liters of gasesous methane (CH4) must be burned in oxygen to produce enough H2O and CO2 to fill a 3.0 L balloon?
Assume
4 answers
asked by
Amy~
1,076 views
Calculate the pH and the poH 0.0035moldm-3 H3 PO4 solution
3 answers
asked by
Ayomide
420 views
Calculate the percentage of carbon in ethanedioic acid Crystal
C2H2O4.2H2O.
2 answers
asked by
Ismaila Oluwaseun
377 views
Synthesis gas consists of equal volumes of:
a. \\(NO^{2}\\) and \\(H_{2}O\\) b. CO and \\(H_{2}O\\) c. \\(N_{2}O \\)and CO d.
3 answers
asked by
Abubakar Osemu Abdulrahman
114 views
1. Calculate the standard enthalpy change for the reaction:
C2H4(g) + H2(g) → C2H6(g) given that the enthalpy of combustion for
4 answers
asked by
John
7,473 views
From the following:
pure water solution of C12H22O11 (m=0.01) in water solution of NaCl (m=0.01) in water solution of CaCl2
5 answers
asked by
Sal
5,439 views
Hey this is my question:
At a temperature of 300°C and a pressure of 40.5 MPa, 90.0 mol of H2(g) and 80.0 mol of N2(g) are
3 answers
asked by
yo!
1,447 views
What weight of na2co3 of 95% purity would be required to neutralize 45.6ml of 0.235n acid?
I want you step by step clearly
3 answers
asked by
Fai
2,032 views
The indicator methyl red has a pKHIn = 4.95. It changes from red to yellow over the pH range from 4.4 to 6.2.
If the indicator is
4 answers
asked by
cp
170 views
Methane, CH4 burns in oxygen gas to form carbon dioxide and water. How many moles of carbon dioxide will be formed from 8.0g of
5 answers
asked by
Denmark
8,398 views
When an element is burnt in excess oxygen, is the oxide formed always:
1. a crystalline solid 2. greater in mass than the element
5 answers
asked by
Monica
2,822 views
What is the purpose for a company to determine percent yield of a product and not just the theoretical yield?
The percent yield
5 answers
asked by
so....help_me
1,227 views
Consider a weak acid HX. If a 0.10 M solution of HX has a pH of 5.87 at 25°C, what is ΔG° for the acid's dissociation
5 answers
asked by
Sarah
2,432 views
How many atoms of each type are represented in each of the following? f. 5Fe(No3)2 g. 4Mg3(PO4)2 h. 2(NH4)2SO4
4 answers
asked by
victoria
3,396 views
Calculate the solubility product of calcium hydroxide if the solubility of Ca(OH)2(s) in water at 25◦C is 0.011 M.
Choices: 1.
6 answers
asked by
vivian
3,812 views
The durian is an Asian fruit that is known for its incredible stench. Food writer Richard Sterling describes its odor as
7 answers
asked by
Anonymous
2,116 views
How many grams of solute are contained in 64.3 mL of 0.0238M KOH?
Do I convert 64.3ml to L=.0643L Multiiply .0643L and .0238M
5 answers
asked by
Suzanne
3,691 views
24 g of carbon and 32 g of oxygen combine to form carbon monoxide. What is the mass of the carbon monoxide formed?
5 answers
asked by
Hii
1,026 views
The pH of a solution changes from 5.5 to 3.5.
This indicates that the [OH−] of the solution has 1. increased by a factor of
4 answers
asked by
susan
1,967 views
experiment: potentiomeric titration
1. Why is continuos stirring (use of stirrer and magnetic stir bar)important in
4 answers
asked by
:kkk:
2,030 views
The company you work for plans to release a waste stream containing 7 mg/L
of benzaldehyde . Assuming that benzaldehyde degrades
4 answers
asked by
Jazmin
2,366 views
Preparation of calcium sulphate.
Calcium sulphate is a slightly soluble solid that is used to make plaster. Prepare the solid.
7 answers
asked by
Galmai Simon
136 views
At 25 degrees C, a sample of NH3( molar mass 17 g) effuses at the rate of .050 mole per minute. Under the same conditions, which
4 answers
asked by
Anonymous
3,395 views
Zinc + hydrochloric acid yields zinc chloride and hydrogen gas. (Zinc has a +2 charge).
Label what type of reaction (synthesis,
4 answers
asked by
Someone
212 views
a 6.0 L vessel contained 0.0222 mol of phosphorus trichloride, 0.0189 mol phosphorus pentachloride and 0.1044 mol of chlorine at
4 answers
asked by
Bristol
1,886 views
iron (III) oxide is formed when iron combines with oxygen in the air. how many grams of Fe2O3 are formed when 16.7g of Fe reacts
5 answers
asked by
cambell
7,949 views
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