447 Answered Questions for the topic chem

Chem Chemistry

12/13/21

Chem help please confused
I have a mixture of three gases in a flask at 25 oC. The total pressure in the flask is 26.2 psi. If my gas mixture consists of 13.2 g of CHCl3, 25.8 g of HCl, and 3.2 g of H2, what is the pressure... more
Follows • 1
Expert Answers •1
Chem Chemistry

12/13/21

Chem help please
Gold metal can be dissolved using sodium cyanide according to the reaction below:4 Au(s) + 8 NaCN (aq) + O2(g) + 2 H2O(l) → 4 NaAu(CN)2(aq) + 4 NaOH(aq)  If I added 86.7 g of Au to 750 mL of a 1.8... more
Follows • 2
Expert Answers •1
Chem Chemistry

12/13/21

PV=nRT equation, I think?
Calcium carbide (Ca2C) reacts violently with water to make calcium hydroxide and acetylene gas (C2H2) as shown below:Ca2C (s) + H2O (l) → Ca(OH)2(aq) + C2H2(g) If 14.8 L of acetylene gas is... more
Follows • 2
Expert Answers •1

12/10/21

what is the molarity of unknown HCL from the known NaOH concentration.
we did this titration lab and I got the following info. We used 6.8333 mL average of 0.7 molarity NaOH to neutralize 25.00 mL of HCL. what are the moles, molarity, ph the of the HCL in this lab?... more
Follows • 1
Expert Answers •1

12/05/21

Classify each compound as saturated or unsaturated hydrocarbon
CH3CH2C≡CCH3CH3CH2CH3CH3CH=CHCH3CH3CH3a. Saturatedb. unsaturated
Follows • 2
Expert Answers •1
Chem Chemistry

12/05/21

Chemistry : Asid and bes

In an experiment, 25 cm² of 0.1 mol dm-3 sulphuric acid is needed to neutralise 25 cm³ of sodium hydroxide solution. Calculate the concentration of sodium hydroxide solution use in this experiment.
Follows • 2
Expert Answers •1

12/05/21

How many grams of NO will be produced from 75.1 g of NO₂ reacted with excess water in the following chemical reaction? 3 NO₂(g) + H₂O(l) → 2 HNO₃(g) + NO(g)
Follows • 1
Expert Answers •1

12/05/21

How many grams of NO will be produced from 75.1 g of NO₂ reacted with excess water in the following chemical reaction? 3 NO₂(g) + H₂O(l) → 2 HNO₃(g) + NO(g)
Follows • 2
Expert Answers •1

12/05/21

At what temperature does uranium hexafluoride have a density of 0.8980 g/L at 0.5073 atm?
Follows • 2
Expert Answers •1

12/04/21

DETERMINE IF THE GIVEN QUANTUM NUMBERS ARE VALID
Determine whether the following sets of quantum numbers are valid or not. If valid, identify the atomic orbital being described and explain it briefly. Any explanations would help me a lot because... more
Follows • 2
Expert Answers •1
Chem Chemistry

12/04/21

Coffee Cup Calorimeter Problem
In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used to determine the specific heat of a solid, or to measure the energy of a solution phase... more
Follows • 2
Expert Answers •1

11/10/21

How many liters of 70% alcohol can be prepared from 1 gallon of 100% alcohol?

Follows • 1
Expert Answers •1

11/10/21

AP chem question
How many moles of magnesium oxide are produced by the reaction of 3.82 g of magnesium nitride with 7.73g of water?Mg3N2 + 3H2O -> 2NH3 + 3MgOa) 0.114b) 0.0378c) 0.429d) 0.0756e) 4.57can someone... more
Follows • 3
Expert Answers •1

11/09/21

----------Chemistry--------
Prove that the enthalpy change of formation is equal to the total change reaction using carbon dioxide.C2H5OH + O2 ------> CO2 + H2OC2H5OH ------- ΔH= -278KJ O2 ------- ΔH= 0 ... more
Follows • 2
Expert Answers •1

11/05/21

From the following formula of hydrophilic ointment solve for the quantities of each ingredient needed to prepare 5 lb (Avoir) of the ointment. Note: 1 lb = 454 g (avoir)
Methylparaben 0.25 gPropylparaben 0.15 gSodium lauryl sulfate 10 gPropylene glycol 120 gStearyl alcohol 250 gWhite Petrolatum 250 gPurified Water, add 1000 ga) Use Ratio & Proportion for... more
Follows • 2
Expert Answers •1

11/02/21

From the following formula for a progesterone nasal spray, calculate the quantity of each ingredient needed to prepare twenty- four 15-mL containers of the spray.
Progesterone 20 mgDimethyl-b-cyclodextrin 62 mgPurif ed water, ad 1 mL
Follows • 2
Expert Answers •1

10/31/21

What is the following signa to English?
"gtt ii a.s. stat, gtt 1 q 6 prn pain".
Follows • 2
Expert Answers •1

10/31/21

How to translate this signa?
tab i SL p.c. x 2 wk. for HTN
Follows • 2
Expert Answers •1

10/31/21

The signa of a prescription is "2 tab qid for 1 month" the patient bought 80 tablets and comes back after 15 days.
Solve for the percent compliance rate and answer up to the 2nd decimal place.
Follows • 2
Expert Answers •1

10/31/21

If the dose of a liquid medicine is 1/2 tsp q 8 h. How many days will a 120 ml liquid medicine will last?
Follows • 2
Expert Answers •1

10/26/21

Find the electronegativity difference
What is the electronegativity difference of CH3OH?Carbon=2.5 Hydrogen=2.1 Oxygen=3.5a. 1.1b. 5c. 0.9d. none of the above
Follows • 2
Expert Answers •1

10/26/21

Find the molarity of this solution.
In 20.0 degree Celsius, a 0.258 m aqueous solution of C6H12O6 (glucose) has a density of 1.017 g/mL. Find the molarity of this solution.
Follows • 2
Expert Answers •1

10/25/21

AP chem question
A solution of 100.0 mL of 0.200 M KOH mixed with a solution of 200.0 ml of 0.150M NiSo4.a) Write the balanced chemical equation for the reaction that occursb) What precipitate forms?c) What is the... more
Follows • 2
Expert Answers •1

10/22/21

chem question (redox)
How many electrons are being transferred in the reaction below when the reaction is balanced?(Cr2O4)^-2 + Cl^-3 -> Cr + Cl2
Follows • 2
Expert Answers •1
Chem Chemistry

10/20/21

Chemistry Question PLEASEEE help
A student decides to find the molar enthalpy for the reaction between phosphoric acid and calcium hydroxide. They have a 0.250 M solution of Ca(OH)2, which they will use; they can only find a 2.1 M... 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.