02/15/22

CHEMISTRY (please help)
" Solve the problem; show your work in the space provided and circle the answer. Express the answer using proper significant figures and units." A sample of hydrogen gas has a volume of 4.4 L at a... more
Follows • 2
Expert Answers •2

02/15/22

Which of the following times is within 10% of 4.63minutes?
Which of the following times is within 10% of 4.63minutes? There may be more than one correct answer.a.) 4.13 minutesb.) 5.28 minutesc.) 4.23 minutesd.) 5.02 minutes
Follows • 2
Expert Answers •1

02/15/22

Help me answer this question??!
You have diluted 2.00mL of 5.69mM iodine solution to a total volume of 8.00mL with acetone, acid, and water. It has taken 3.27 minutes for all of the color to disappear. What is the rate of this... more
Follows • 2
Expert Answers •1

02/14/22

The radius of a silver ball is 13.45 cm, and its density is 10.49 g/cm3. What is the mass of the ball in grams? Assume the ball is a sphere with a Volume = 4/3 π r3.
The radius of a silver ball is 13.45 cm, and its density is 10.49 g/cm3. What is the mass of the ball in grams? Assume the ball is a sphere with a Volume = 4/3 π r3.
Follows • 2
Expert Answers •1

02/13/22

Chemistry Conductivity
Wh‎at cau‎ses the inc‎rease in condu‎ctivity of glac‎ial ace‎tic ac‎id upon diluti‎on with dist‎illed w‎ater?a. Ad‎ding wa‎ter incre‎ases the pH of the solu‎tion, result‎ing to the incr‎ease in OH-... more
Follows • 2
Expert Answers •1

02/13/22

A chemist prepares a solution of silver(II) oxide (AgO) by measuring out 0.00339 μmol of silver(II) oxide into a 450. mL volumetric flask and filling the flask to the mark with water.
Calculate the concentration in mmol/L of the chemist's silver(II) oxide solution. Round your answer to 3 significant digits.= ____ mmol / L
Follows • 2
Expert Answers •1

02/12/22

How do you balance these redox reactions by the half-reaction method?
How do you balance these redox reactions by the half-reaction method?Na + Hg2Cl2 → NaCl + Hg
Follows • 2
Expert Answers •1

02/12/22

How do you balance these redox reactions by the half-reaction method?
How do you balance these redox reactions by the half-reaction method? 1. Al2O3 + C → Al + CO2 2. Na + Hg2Cl2 → NaCl + Hg
Follows • 2
Expert Answers •1

02/12/22

How do I write balance equations for this redox reaction NaBr + Cl2 ===> NaCl + Br2 by the half reaction method?
How do I write balance equations for this redox reaction NaBr + Cl2 ===> NaCl + Br2 by the half reaction method?
Follows • 2
Expert Answers •1

02/12/22

How do I write balance equations for this redox reactions Fe2O3 + CO ===> Fe + CO2 in acidic solution?
How do I write balance equations for this redox reactions Fe2O3 + CO ===> Fe + CO2 in acidic solution?
Follows • 2
Expert Answers •1

02/12/22

Ion Concentration
Part AWhat is the concentration of K+ in 0.15M of K2S ?Part BIf CaCl2 is dissolved in water, what can be said about the concentration of the Ca2+ ion?Part CA scientist wants to make a solution of... more
Follows • 2
Expert Answers •1

02/12/22

What is the mass percent of vitamin C and sucralose in the sample?
A 1.335 g sample contains only vitamin C (C6H8O6) and sucralose (C12H19Cl3O8). When the sample is dissolved in water to a total volume of 44.3 mL, the osmotic pressure of the solution is ... more
Follows • 2
Expert Answers •1

02/12/22

Solution Stoichiometry
When solutions of silver nitrate and potassium chloride are mixed, silver chloride precipitates out of solution according to the equationAgNO3(aq)+KCl(aq)→AgCl(s)+KNO3(aq)Part AWhat mass of silver... more
Follows • 2
Expert Answers •1

02/12/22

Calculate the standard enthalpy of formation of the fictitious compound, gaseous dideborane (D2H6) using the following thermochemical information: (in description)
4D (s) + 3O2 (g) 2D2O3 (s) Delta H -2345.1 kJ2H2 (g) + O2 (g) 2 H2O (l) Delta H - 571.7 kJD2H6 (g) + 3O2 (g) D2O3 (s) + 3H2O (l) Delta H -2134.5 kJ
Follows • 2
Expert Answers •1

02/12/22

When a 100 mL sample of 0.2345 M aqueous hydrochloric acid is added to 100.0 mL of 0.2345 M aqueous ammonia in a calorimeter whose heat capacity(minus water) is 0.480 kJ/°C, (continued in description)
the temperature increase by (117 x 0.02345)°C. Assume that the volumes are additive, and that thedensity of the solution is 1.000 g/mL. The following reaction occurs when the two solutions are... more
Follows • 2
Expert Answers •1

02/12/22

Naphthalene combustion can be used to calibrate the heat capacity of a bomb calorimeter. The heat of combustion of naphthalene is ±40.1 kJ/g. (continued in description)
calibrate the heat capacity of a bomb calorimeter. The heat ofcombustion of naphthalene is ±40.1 kJ/g. When 3.450 g of naphthalene was burned in a calorimetercontaining 1.000 kg of water, a... more
Follows • 2
Expert Answers •1

02/12/22

Need help with Chem
If 100.0 molecules of H2 and 43.0 molecules of O2 react, how many molecules of H2O can be produced in the reaction below?2 H2(g) + O2( g) —> 2 H2O(g)
Follows • 1
Expert Answers •1

02/11/22

Finding mole fraction in gaseous mixture
For the decomposition of gaseous dinitrogen pentoxide, 2N₂O₅(g) → 4NO₂(g) + O₂(g) the rate constant is k = 2.8 × 10⁻³ s⁻¹ at 60°C. The initial concentration of N₂O₅ is 2.95 mol/L in a closed... more
Follows • 2
Expert Answers •1

02/11/22

Hess's Law Paper
Calculate the standard enthalpy of formation for cyclohexanol (C6H11OH) provided the followingC6H11OH (l) ∆Hc° = -3727 kJ mol-1C (s) ∆Hc° = -393.5 kJ mol-1H2 (g) ∆Hc° = -285.5 kJ mol-1
Follows • 2
Expert Answers •1

02/11/22

Hess's Law Paper
Calculate the standard enthalpy of formation of benzene (C6H6) given the following standard enthalpies of combustion. C6H6 (l) = -3273 kJ mol-1C (s) = -393.5 kJ mol-1H2 (g) = -285.5 kJ mol-1
Follows • 2
Expert Answers •1

02/11/22

Bases Chem Questions
Gi‎ven the fol‎lowing data 2Cl‎F(g) + O‎2(g) --> Cl2‎O(g) + F2‎O (g)     De‎lta H= 167.4 kJ          I2Cl‎F3(g) + 2O‎2(g) --> Cl‎2O(g) + 3F2‎ O (g)  Delta H= 341.4 kJ    II 2... more
Follows • 2
Expert Answers •1

02/11/22

I need help in my Chemistry...
What is the procedure and solution in performing these? How many mL of 0.310 M barium nitrate are required to precipitate as barium sulfate all the sulfate ions from 28.0 mL of 0.380 M aluminum... more
Follows • 2
Expert Answers •1

02/11/22

CHEMISTRYYY Helllppp!!!
Balance these redox reactions by the half-reaction methodSn2+ → Sn + Sn4+
Follows • 2
Expert Answers •1

02/11/22

How do I find the average mass % of oxygen with the data collected?

Table 1 Potassium Chlorate Reaction Titration Mass of Sample before heating (g) Mass of Sample after heating (g) Moles of KCl (mols) Moles of O... more
Follows • 2
Expert Answers •1

02/11/22

what is the freezing depression 171 g of sucrose in 1.00 kg of water
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.