25,963 Answered Questions for the topic chemistry

Chemistry

09/06/23

Calculate the concentration

Consider this reaction:2SO3(g) -> 2SO2 (g) + O2 (g)At a certain temperature it obeys this rate law.rate = (3.67 M-1 .s-1) [SO3]2Suppose a vessel contains SO3 at a concentration of 0.970M.... more
Follows • 2
Expert Answers •1
Chemistry

09/06/23

What will the concentration be 224 minutes later?
The rate at which a certain drug is eliminated by the body follows first-order kinetics, with a half life of  56 minutes.Suppose in a particular patient the concentration of this drug in the... more
Follows • 2
Expert Answers •1
Chemistry

09/06/23

Consider this reaction
Consider this reaction:2N2O5 (g) -> 2N2O4 (g) + O2 (g)At a certain temperature it obeys this rate law.rate = (0.147 s-1) [N2O5]Suppose a vessel contains N2O5, at a concentration of 1.15M.... more
Follows • 2
Expert Answers •1

09/06/23

Histidine has pka of 6. What will be the net charge in Histidine in a solution of (a) pH 8.0 (b) pH 5.0
Follows • 2
Expert Answers •1

09/06/23

Histidine has pka of 6. What will be the net charge in Histidine in a solution of (a) pH 8.0 (b) pH 5.0
Follows • 2
Expert Answers •1
Chemistry

09/04/23

Find K for the reaction: CH4 (g) + O2 (g) ⇌ CH2O (g) + H2O (g)
Given the following equilibrium equations and their corresponding equilibrium constants:CO2 (g) + H2O(g) ⇌ O2 (g) + CH2O (g) K1 = 6.1 x 108CH4 (g) + 2O2 (g) ⇌ CO2 (g) + 2H2O (g) ... more
Follows • 3
Expert Answers •1
Chemistry

09/04/23

Percentage Purity of magnesium oxide

1.10 g of impure magnesium oxide (MgO) was dissolved in 25.0 mL of 3.20 mol L–1 hydrochloric acid. The resulting solution was diluted to 250 mL in a volumetric flask. 20.0 mL of this diluted... more
Follows • 2
Expert Answers •2
Chemistry

09/04/23

Write the numbers in scientific notation.
Write the numbers in scientific notation.1.673.5 673.5= ? x 10 ^a a= ?2.0.0340.034=? x 10^b b=?
Follows • 1
Expert Answers •2
Chemistry

09/04/23

Arrange the values according to magnitude.
Arrange the values according to magnitude.Write Greatest to least 58000, 1.0 x 10^5 , 4.3 x 10^-2, 9.0 x 10^-6, 8.1 x 10^-6
Follows • 1
Expert Answers •1
Chemistry

09/04/23

what is the total mass in kg and what is the maximum volume in L
You are on the management team of a company that is considering purchasing a tanker truck. The truck you want has a volume of 24,000 liters and an empty mass/weight of 15,700 kg. However, the route... more
Follows • 1
Expert Answers •1
Chemistry

09/04/23

volume to mL and total mass to grams
An empty beaker weighs 39.65 g.When completely filled with water, the beaker and its contents have a total mass of 420.85 g. What volume does the beaker hold? Use 𝑑=1.00 g/mL as the density... more
Follows • 1
Expert Answers •1
Chemistry

09/04/23

Tutors are catfishing
I messaged one tutor and asked about the services and after awhile I agree to get tutoring. Then I get redirected to some other guy who has different reviews and is charging more for the service.... more
Follows • 1
Expert Answers •1
Chemistry

09/04/23

Perform the calculation and record the answer with the correct number of significant figures.
Perform the calculation and record the answer with the correct number of significant figures.(34.123+4.20) divided by (98.7654−6.639)=
Follows • 1
Expert Answers •1
Chemistry

09/04/23

Perform the calculation and record the answer with the correct number of significant figures.
Perform the calculation and record the answer with the correct number of significant figures.(6.5−5.91) / 3.83=
Follows • 1
Expert Answers •1
Chemistry

09/02/23

A certain ore is 27.3% nickel by mass. How many kilograms of this ore would you need to dig up to have 40.0 g of nickel?
Follows • 2
Expert Answers •2
Chemistry

08/31/23

Use this information to complete the table below.

A certain reaction is second order in N2 and first order in H2. Use this information to complete the table below. Round each of your answers to  significant digits. [N2] [H2] initial rate of... more
Follows • 1
Expert Answers •1
Chemistry

08/31/23

Use this information to write a rate law for this reaction, and calculate the value of the rate constant k.
Some measurements of the initial rate of a certain reaction are given in the table below. [N2] [H2] initial rate of reaction 1.87 M 1.78 M 25.0 M/s 1.87 M 0.403 M 1.28 M/s 3.98 M 1.78 M 113.... more
Follows • 2
Expert Answers •2
Chemistry

08/31/23

Use this information to write a rate law for this reaction, and calculate the value of the rate constant k
Some measurements of the initial rate of a certain reaction are given in the table below. [N2] [H2] initial rate of reaction 1.36 M 0.913 M 0.484 M/s 1.36 M 4.35 M 11.0 M/s 4.53 M 0.913... more
Follows • 2
Expert Answers •1
Chemistry

08/31/23

General Chemistry
The rate constant for the reaction is 0.620 M−1⋅s at 200 ∘CA⟶productsIf the initial concentration of A is 0.00670 M, what will be the concentration after 115 s?
Follows • 2
Expert Answers •1
Chemistry

08/31/23

General Chemistry
The reactionC4H8(g)⟶2C2H4(g)C4⁢H8⁡(g)⟶2⁢C2⁢H4⁡(g)has an activation energy of 262 kJ/mol.262 kJ/mol. At 600.0 K,600.0 K, the rate constant, 𝑘, is 6.1×10−8 s−1. What is the value of the rate constant... more
Follows • 2
Expert Answers •1
Chemistry

08/31/23

calculate the mass
A certain organic compound O has a solubility in acetonitrile of 72.6 g/L at 5. °C. Calculate the mass of O that's dissolved in 300. mL of a saturated solution of O in acetonitrile at this... more
Follows • 2
Expert Answers •1
Chemistry

08/31/23

calculate the mass
At 25.0 °C the Henry's Law constant for sulfur hexafluoride (SF6) gas in water is 2.4 x 10^-4 M/atm. Calculate the mass in grams of SF6 gas that can be dissolved in 800. mL of water at 25.0 °C and... more
Follows • 2
Expert Answers •1
Chemistry

08/31/23

calculate the volume
The solubility in acetone of organic compound O is measured and found to be 0.527 g/mLat 10. °C. Calculate the volume of a saturated solution of O in acetonethat would contain 390. mg of O at this... more
Follows • 2
Expert Answers •1
Chemistry

08/31/23

Calculate the mass of O
 A certain organic compound has a solubility in acetonitrile of 72.6 g/L at 5. C. Calculate the mass of O that's dissolved in 300. mL of a saturated solution of O in acetonitrile at this... more
Follows • 2
Expert Answers •1
Chemistry

08/31/23

The vapor pressure of ethanol, CH3CH2OH , at 35.0 °C is 13.67 kPa . If 2.01 g of ethanol is enclosed in a 2.50 L container, how much liquid will be present?
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.