25,963 Answered Questions for the topic chemistry

Chemistry

04/24/23

Rates of Decay Reactions
The half-life of cesium-129 is 32.0 hours. How much time is required for the activity of a sample of cesium-129 to fall to 10.4 percent of its original value?
Follows • 2
Expert Answers •1
Chemistry

04/24/23

Relationship Between pH and pOH for Acid and Bases Worksheet
Relationship Between pH and pOH for acids and bases pH vs. pOH scale: [H+] vs. [OH-]: Name ______________________________________________ Date _______________ Period _____________ Both acids and... more
Follows • 1
Expert Answers •1
Chemistry

04/24/23

Calculate the pH and pOH of a 0.25 M NaOH solution
Calculate the pH and pOH of a 0.25 M NaOH solution. • Are you working with an acid or a base? ____________ • Are you given the concentration, or Molarity of that solution? ____________ • Next, plug... more
Follows • 1
Expert Answers •1
Chemistry

04/24/23

Determine the molarity of a solution that is prepared by dissolving 60 grams of LiBr in 500 mL of solution.

Follows • 2
Expert Answers •1
Chemistry

04/24/23

Stoichiometry question

what mass of KCl will be produced if 4.5g of Cl2 reacts with K?
Follows • 2
Expert Answers •2
Chemistry

04/24/23

Chemistry Stoichiometric Relationship
7. A solution of 0.65 mol/dm3 NaCl contains 2.3g. What volume of water was the NaCl dissolved in?
Follows • 1
Expert Answers •1
Chemistry

04/24/23

Chemistry Stoichiometric Relationship
Q5. How many grams of NaCl are contained in a 250 cm3 of a solution with concentration 0.4 mol/dm3?
Follows • 1
Expert Answers •1
Chemistry

04/24/23

Stuck on chemistry problem

A gas has a volume of 200 mL at a pressure of 550 mmHg. If the temperature is held constant, what is the volume of the gas at a pressure of 750 mmHg?
Follows • 1
Expert Answers •1
Chemistry

04/24/23

Chemistry stuck on problem

The total pressure of an O_{2} Ar, He gas mixture is 900mmHg If the partial pressure of Ar is 200 mmHg and the partial pressure of He is 300 mm Hg, what is the partial pressure of ,? O_{2}
Follows • 1
Expert Answers •1
Chemistry

04/24/23

Chemistry stuck on problem

6) A container consists of 20% oxygen, 20% nitrogen, 60% hydrogen. If the total pressure is 75.0 atm, what is the partial pressure of hydrogen in the container ?
Follows • 1
Expert Answers •1
Chemistry

04/23/23

redox reaction of NO2 to NO3
For a particular redox reaction, NO−2 is oxidized to NO−3 and Ag+ is reduced to Ag. Complete and balance the equation for this reaction in basic solution. Phases are optional.balanced redox reaction:
Follows • 2
Expert Answers •1
Chemistry

04/23/23

A 0.1375-g of solid mg is burned with a heat capacity of 3024 J/C. The temperature increases by 1.126 C. Calculate the heat given off by the burning Mg in kJ/g and in kJ/mol.

Follows • 2
Expert Answers •1
Chemistry

04/23/23

A 6.22-kg piece of copper metal is heated from 20.5°C to 324°C. Calculate the heat absorbed (in kJ) by the metal.

Follows • 1
Expert Answers •1
Chemistry

04/23/23

A piece of silver of mass 362g has a heat capacity of 85.7 J/°C. What is the specific heat of silver?
Follows • 2
Expert Answers •1
Chemistry

04/23/23

2CuS(s) + 3O2(g) --> 2CuO(s) +2SO2(g) ΔH = -805.6 kJ/mol. Calculate the heat evolved (in kJ) per gram of CuS roasted.
I don't really get how to solve this problem...
Follows • 2
Expert Answers •1
Chemistry

04/23/23

If you start with 3.73 g of NH4NO3, how many grams of NH3 can you make?
2 NH4NO3 + Ca(OH)2 -> 2NH3 + 2 H2O + Ca(NO3)2
Follows • 2
Expert Answers •1
Chemistry

04/23/23

If you mix 0.91 L of 0.412 M CuCl2 with 1.92 L of 0.547 M NaOH, how many grams of Cu(OH)2 will you make?
CuCl2 + NaOH --> Cu(OH)2 + NaCl
Follows • 1
Expert Answers •1
Chemistry

04/23/23

You mix 3.68 L of 0.192 M BaCl2 with excess phosphoric acid. How many moles of Ba3(PO4)2 can you make?
BaCl2 + H3PO4 --> Ba3(PO4)2 + HCl
Follows • 2
Expert Answers •1
Chemistry

04/23/23

If you mix 67 mL of 1.375 M AgNO3 with 18.867 mL of 1.238 M CaCl2, how many mol of Ca(NO3)2 can you make?
AgNO3 + CaCl2 --> AgCl + Ca(NO3)2
Follows • 1
Expert Answers •1
Chemistry

04/23/23

If you mix 471.65 mL of 1.786 M NaOH with excess CuCl2, how many grams of Cu(OH)2 could you make?
CuCl2 + NaOH --> Cu(OH)2 + NaCl
Follows • 1
Expert Answers •1
Chemistry

04/23/23

If you mix 58.75 mL of 0.293 M AgNO3 with 40.34 mL of 0.91 M CaCl2, how many moles of AgCl can you make?
AgNO3 + CaCl2 --> AgCl + Ca(NO3)2
Follows • 2
Expert Answers •1
Chemistry

04/23/23

If you mix 39.19 mL of 2.405 M AgNO3 with 48.91 mL of 0.924 M CaCl2, how many moles of AgCl can you make?
AgNO3 + CaCl2 --> AgCl + Ca(NO3)2
Follows • 2
Expert Answers •1
Chemistry

04/23/23

Chemistry related question

When equal volumes of 0.1 M solutions of HCI and NaOH are mixed, the total number of ions present will be approximately(A) twice as great as before mixing.(B) the same as before mixing.(C) half as... more
Follows • 1
Expert Answers •1
Chemistry

04/23/23

Chemistry related question

A sample of nitrogen at pressure P is contained in a sealed syringe with a movable piston. If the volume of the sample were doubled and the absolute temperature tripled, the new pressure of the gas... more
Follows • 2
Expert Answers •1
Chemistry

04/23/23

Chemistry related question

A 1200 mL sample of helium gas is at a pressure of 350 mmH and a temperature of 300 K. What volume will this gas sample occupy if the pressure is increased to 700 mmH and the temperature is... more
Follows • 1
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.