10/29/20

chemistry class

Chlorine gas can be prepared in the laboratory by the reaction of hydrochloric acid with manganese(IV) oxide.4HCl(aq)+MnO2(s)⟶MnCl2(aq)+2H2O(l)+Cl2(g)A sample of 42.1 g MnO2 is added to a solution... more
Follows • 2
Expert Answers •1

10/29/20

chemistry class

Combining 0.370 mol Fe2O3 with excess carbon produced 17.7 g Fe.Fe2O3+3C⟶2Fe+3COWhat is the actual yield of iron in moles?What is the theoretical yield of iron in moles?What is the percent yield?
Follows • 2
Expert Answers •1

10/29/20

chemistry class

What is the number of formula units in a 4.44 mol sample of FeCl3?
Follows • 2
Expert Answers •1

10/29/20

chemistry class

How many moles of zinc, Zn, are in 1.77×1024 Zn atoms?
Follows • 2
Expert Answers •1

10/29/20

Chemistry class

The balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous NaI isPb(ClO3)2(aq)+2NaI(aq)⟶PbI2(s)+2NaClO3(aq)What mass of precipitate will form if 1.50 L of concentrated Pb(ClO3)2 is... more
Follows • 2
Expert Answers •1

10/29/20

chemistry class

If 0.0593 mol CaCl2 is dissolved in water to make a 0.810 M solution, what is the volume of the solution?
Follows • 2
Expert Answers •1

10/29/20

Chemistry Question
How do we figure out how to name chemistry compounds?
Follows • 2
Expert Answers •1

10/29/20

Temperature and volume
A sample of gas in a balloon has an initial temperature of 35  and a volume of 1.01×103  . If the temperature changes to 65  , and there is no change of pressure or amount of gas, what is the new... more
Follows • 2
Expert Answers •1

10/29/20

rate of reactions
Hi,I need some help with this question:What control experiment should be done to ensure that the rate observed is due to specific enzyme catalysis and not to spontaneous chemical reaction?I... more
Follows • 2
Expert Answers •2

10/29/20

What is the half-life of Iron-60 that decays from 70 g to 8.75 g in 9 days?
Follows • 2
Expert Answers •1

10/29/20

%yield and limiting reagents (pls show work on all probelms)
2. Fe 3 O 4 + 4 H 2 → 3Fe + 4H 2 Oa. If you start with 0.122 g of H 2 , how much H 2 O do you theoreticallymake?b. You make 0.745 g of H 2 O in the lab, what is your percent yield?3. 2Al+ 3Cl 2 →... more
Follows • 2
Expert Answers •2

10/29/20

If you have a temperature of 29.6 C, what is the value in K? (follow sig figs and only enter numbers).

Follows • 2
Expert Answers •2

10/29/20

According to the KMT, which gas will move the fastest at the same temperature: Argon, Oxygen, Xenon, or Fluorine
Follows • 2
Expert Answers •1

10/29/20

A gas system has initial pressure and volume of 2790 torr and 14.32 L. If the volume changes to 16200 mL, what will the resultant pressure be in atm? (1 atm=760 torr)
Follows • 2
Expert Answers •1

10/29/20

Opposing pharmacological effects
To what extent can agonists reverse antagonists? Is ir possible associated pathways don't return to their original behavior?
Follows • 2
Expert Answers •1

10/29/20

Quantitative relationships involving Hess law and ΔH
Calculate ΔH rxn for the reaction: 5 C(s) +6H2(g) = C5H12(l)given these reaction and their ΔHC5H12(l)+ 8O2(g) = 5CO2(g) + 6H2O(g) ΔH = - 327.5 kJ C(s) + O2(g) =... more
Follows • 3
Expert Answers •1

10/29/20

Chemistry Partial pressure
A 1.20-g sample of dry ice (solid carbon monoxide) is added to a 755-mL flask containing nitrogen gas at a temperature of 25.0 C and a pressure of 725 mmHg. The dry ice is allowed to sublime... more
Follows • 3
Expert Answers •1

10/29/20

Molar volume, STP
Use the molar volume of a gas at STP to the determine the volume (in L) occupied by 15 g of neon at STP
Follows • 2
Expert Answers •1

10/29/20

The half-life of polonium-218 is 3.0 minutes. If you start with 50.0 g, how long will it be before only 2.6 g remains?
Follows • 2
Expert Answers •1

10/28/20

[H3O+]=4.2×10−8M, [H3O+]=4.7×10−2M , [H3O+]=4.7×10−2M, [OH−]=0.006M
Determine PH, Express your answer using two decimal places.
Follows • 2
Expert Answers •1

10/28/20

A patient with respiratory alkalosis has a blood plasma pH of 7.54. What is the [OH−] of the blood plasma? Express your answer to two significant figures and include the appropriate units.
Follows • 2
Expert Answers •1

10/28/20

limiting reagent (pls show work)
Given the following reaction: (Balance the equation first!)A) C 3 H 8 + __O 2  __CO 2 + __H 2 Ob) If you start with 14.8 g of C 3 H 8 and 3.44 g of O 2 ,determine the limiting reagent with respect... more
Follows • 2
Expert Answers •1

10/28/20

How much heat is required to change 235 g of iodine at 25 degrees celsius into vapor at 198 degrees celsius? (the melting point is 113.5 degrees celsius and the boiling point is 185.4 degrees celsius)
Use Joules pls ................................
Follows • 2
Expert Answers •1

10/28/20

Specific Heat energy

A sample of gaseous hydrogen is heated with an electrical coil. If 2.58×103 Joules of energy are added to a 11.8 gram sample initially at 21.0 °C, what is the final temperature of... more
Follows • 2
Expert Answers •1

10/28/20

Specific heat to energy temp
A. A sample of gaseous hydrogen is heated with an electrical coil. If 2.58×103 Joules of energy are added to a 11.8 gram sample initially at 21.0 °C, what is the final temperature of... more
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.