05/05/20

What is the half life of a radioisotope if you started with 1 gram and 0.250 grams is left after 6 days?
How many days is it going to be?
Follows • 3
Expert Answers •1

05/05/20

Calculate pH of a solution made by mixing 10 mL of HCl (0.20 M) with 15.0 mL of NaOH (0.10 M).

Follows • 2
Expert Answers •1

05/05/20

Can anyone help me with this Chemistry question.
0.080 mg of Mg reacts with HCl (aq) to give 85.5 mL of og H2 gas at 22oC and 759 mm Hg pressure. Mg(s)  + 2HCl (aq)  MgCl2 (aq) + H2(g) a) What is the partial pressure of H2 gas? b) Use CGL to... more
Follows • 2
Expert Answers •1

05/05/20

2 SO2(g) + O2(g) >< 2 SO3(g)
In order to obtain the equilibrium system above, 2.60 mol of SO2(g) and 2.30 mol of O2(g) are injected into a 1.00 L container. When the system reaches equilibrium, the concentration of the... more
Follows • 2
Expert Answers •1

05/05/20

When the equations numbered below are ordered from the reaction that produces the most products to the reaction that produces the least products, the order is:
A. H2(g) + I2(g) >< 2 HI(g) Kc = 2.5x10^-1B. N2(g) + O2(g) >< 2 NO(g) Kc = 2.0x10^-31C. H2(g) + Cl2(g) >< 2 HCl(g) Kc = 2.5x10^33D. H2(g) + Br2(g) >< 2 HBr(g) Kc =... more
Follows • 2
Expert Answers •1

05/05/20

2 H2(g) + CO(g) >< CH3OH(g)
The methanol is produced in a reaction chamber, in which the chemical system reaches equilibrium. some methanols removed and reactants are added to cause the equilibrium to shift to the right.If at... more
Follows • 2
Expert Answers •1

05/05/20

The reaction of hydrogen gas with carbon dioxide produces water vapor and carbon monoxide in the following equilibrium: H2(g) + CO2(g) >< H2O(g) + CO(g) Keq = 1.60
If the equilibrium concentrations of both H2(g) and CO2(g) are 0.25 mol/L, the final equilibrium concentration would be;______Cant seem to figure this one out. Help much appreciated.
Follows • 2
Expert Answers •1

05/05/20

A 1.20 mol/L solution of carbonic acid is added to a reaction vessel allowed to reach equilibrium at 25'C, according to the reaction; H2CO3(aq) >< H+(aq) + CO3^2- (aq) Keq = 4.41 x 10^-7.
The numeric values of a, b, c, & d, for the equilibrium concentration of H+(aq), when expressed in the format a.bc x 10^-d are;Cant find the answer to this question. Help much appreciated.
Follows • 2
Expert Answers •1

05/05/20

5. Using the equation moles = mass (g) /molar mass find the moles of sodium carbonate. Remember, you used 5 grams!
Follows • 2
Expert Answers •1

05/05/20

A mass of 22.5 grams of aluminum will react with how many grams of zinc chloride?
Follows • 2
Expert Answers •1

05/05/20

Stoichiometry Gas Problem
Sodium reacts vigorously with water to produce hydrogen and sodium hydroxide 2Na(s) + 2H2O(i) -> 2NaOH(aq) + H2(g). If 0.027 g of sodium react with excess water, what volume of hydrogen at STP... more
Follows • 2
Expert Answers •1

05/05/20

Need some help with this chemistry question!
Follows • 2
Expert Answers •1

05/05/20

PLEASE HELP ASAP!
A container with initial volume of 1.01L is ccupied by a gas at a pressure of 1.5 atm at 25 degrees.By changing the volume , the presure of the gas increases to 6.0atm as the temperture is raised... more
Follows • 2
Expert Answers •2

05/05/20

chemistry equation
Determine the percent yield of the reaction below when a scientist used 40.0 grams of SiO2 and 40.0 grams of HF and was able to yield 45.8 grams of H2SiF6?SiO2 (s) + 6 HF (aq) =  H2SiF6 (aq) + 2... more
Follows • 1
Expert Answers •1

05/05/20

chemistry equation
Ethanol (C2H5OH) is produced from the fermentation of sucrose (C12H22O11) in the presence of enzymes.           C12H22O11 (aq) + H2O (g) 🡪 4 C2H5OH (l) + 4 CO2 (g)   A scientist performed the... more
Follows • 1
Expert Answers •1

05/05/20

If you eat cellulose acetate will it dissolve in your stomach?
If you eat an unused cigarette filter, will it dissolve in your stomach or stay in your whole digestive tract forever? I read a research article where the fibers of cellulose acetate didn't... more
Follows • 2
Expert Answers •1

05/05/20

. How many grams of calcium nitrate are needed to react completely with 2.00 moles of hydrochloric acid? Ca(NO3)2 + 2HCl → CaCl2 + 2HNO3
Follows • 2
Expert Answers •1

05/05/20

concentration of carbon monoxide at equilibrium
Knowing Kp = Kc(RT)Δng (R=0.0821 L atm/mol K)The reaction2CO2 (g) ↔2CO(g) + O2 (g)has Kc = 6.4 ×10−7.If a 1.00 L container holding 1.0 ×10−2 mol of carbon dioxide is heated to 2000 Celsius and... more
Follows • 2
Expert Answers •1

05/05/20

Partial Pressure
Knowing Kp = Kc(RT)Δng (R=0.0821 L atm/mol K)The reaction2HCl (g) ↔H2 (g) + Cl2 (g)has Kc= 3.2 ×10−34 at 25 Celsius. If a reaction vessel contains initially 0.45 atm of HCl which then reacts to... more
Follows • 2
Expert Answers •1

05/04/20

College chemistry?

Consider the voltaic cell, which is based on the cell reaction Zn(s)+Cu^ 2+ (aq)—> Zn^ 2+ (aq)+Cu(s).under standard conditions what is the maximum electrical work, in joules, that the cell can... more
Follows • 2
Expert Answers •1

05/04/20

Write the complete reaction, including state of matter for the following combination of aqueous reactants. Then provide the net ionic equation

H2CO3 + Lithium hydroxide
Follows • 2
Expert Answers •1

05/04/20

Need help with this question
A 1.20 g sample of KOH and 2.50 g of FeCl3, are dissolved in water, then mixed together. What mass of Fe(OH)3 solid is formed? Aqueous KCl is the other product. If the actual yield of Fe(OH)3 is... more
Follows • 1
Expert Answers •1

05/04/20

A gas balloon has a volume of 106.0 liters when the temperature is 40K and the pressure is 740.0 mm of mercury. What will its volume be at 30K and 780 .0 mm of mercury pressure?

Its the combined gas law
Follows • 2
Expert Answers •1

05/04/20

chemistry help please

When lithium hydroxide reacts with hydrochloric acid the salt formed is A) LiCl B) LiHCl C) LiCl2 D) LiCl3
Follows • 2
Expert Answers •1

05/04/20

Chemistry 60 Help
How many photons with a wavelength of 761 nm are needed to melt 405g of ice? Number of photons?
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.