10/28/22

Amount of kJ evolved or absorbed?
The following thermochemical equation is for the reaction of methane(g) with water(g) to form hydrogen(g) and carbon monoxide(g). CH4(g) + H2O(g)3H2(g) + CO(g)    H = 206 kJ When 4.65 grams... more
Follows • 2
Expert Answers •1

09/01/22

Need help don't understand how to do this
Write the empirical formula for at least four ionic compounds that could be formed from the following ionsFe^3+, PO4^3-, Fe^2+, ClO3^-
Follows • 1
Expert Answers •1

08/24/22

Chemistry stoichiometry

calculate how many moles of NO2 form when each quantity of reactant completely reacts2N2O5 (g) -> 4NO2 (g) + O2 (g)a.) 2.5 mol N2O5b.) 6.8 mol N2O5c.) 15.2 g N2O5d.) 2.87 kg N2O5
Follows • 0
Expert Answers •1

08/19/22

Question 2 Which of the following would be classified as a compound? a air b steel c carbon d water
11th grade Science- Chem
Follows • 1
Expert Answers •1

08/18/22

Chemistry Question about gas & temperature

Dear experts,I would like to know how to solve this problem: How many nitrogen atoms are present in one mole of nitrogengas at the temperature of 0 ° C and at a pressure of 1 atm? (Actually it asks... more
Follows • 2
Expert Answers •2

08/18/22

Lone pairs (Chemistry Question)...
Dear experts,I would like to know whether the lone pairs of the atoms actually (squeeze) the atom into formingspecific molecular structures. For example PH3 and NH3 molecules both have 1 lone pair,... more
Follows • 2
Expert Answers •2

08/10/22

The concentration of hydroxide ion in an aqueous solution at 25°C is 3.6 × 10⁻⁴ M. What is the concentration of the hydronium ion?
Follows • 1
Expert Answers •2

08/08/22

On Friday, March 11, 2011, Japan was hit with an earthquake that measured 8.9 (Please help me with this)
Shortly thereafter, a 13 foot wall of water engulfed the coastal villages and towns. The Fukushima Daichi nuclear power plant, which consists of 6 reactors, was built to withstand the earthquake.... more
Follows • 1
Expert Answers •1

07/25/22

Moles - Chemistry
Pop is made up of three major parts (water, carbon dioxide, and sugar). Assume that all other ingredients are present in insignificant amounts. Explain how could you determine the moles and... more
Follows • 0
Expert Answers •1

07/21/22

Chemistry Help Please
A gas has a volume of 2.43 L at 1.00 atm and 0.00 ºC (STP). At what temperature does it have a volume of 7.62 L at 335 mmHg ? Report your answer rounded to the hundredth of a ºC. 
Follows • 1
Expert Answers •1

07/20/22

This is for my chemistry course

Balance the equation below and answer the question: Fe + O2 = Fe2O3How many grams of Fe2O3 are produced when 100,000 molecules of O2 are reacted?
Follows • 1
Expert Answers •1

07/19/22

Finding Ksp from given concentration
Determine the Ksp for Ba(NO₃)₂. The concentration of Ba²⁺ in a saturated solution of Ba(NO₃)₂ is 0.105 M. What is the concentration of nitrate ions?
Follows • 1
Expert Answers •1

07/19/22

Chemistry homework
Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes the transition from the energy level 𝑛=7n=7 to the level 𝑛=2.
Follows • 1
Expert Answers •1

07/12/22

Partial Pressure Question
A mixture of hydrogen and krypton gases, in a 6.18 L flask at 76 °C, contains 0.320 grams of hydrogen and 6.06 grams of krypton. The partial pressure of krypton in the flask is____atm and the total... more
Follows • 1
Expert Answers •1

06/30/22

Chemistry 102: Kinetics: Arrhenius Equation
The rate constant for the reaction below was determined to be 3.241×10-5  s–1 at 800 K. The activation energy of the reaction is 265  kJ/mol. What would be the value of the rate constant... more
Follows • 1
Expert Answers •2

06/28/22

Help me solve this problem
How much heat is required to warm 35.21g of liquid water at 88.53°C to steam (gaseous water) at 124.67°C?Specific Heat (ice) = 37.6 J/K*mol; Specific Heat (water) = 75.3 J/K*mol; Specific Heat... more
Follows • 1
Expert Answers •2

06/27/22

Chemistry 102: Kinetics: Concentration
The reaction 2A → A2​​​​​ was experimentally determined to be second order with a rate constant, k, equal to 0.0265 M–1min–1. If the initial concentration of A was 2.25 M, what was the... more
Follows • 1
Expert Answers •1

06/27/22

Kinetics of Chem 102
In a study to determine the rate of the following reaction:2NO(g)+O2​(g)2NO2​(g)The concentration of NO was 0.0300 M at t = 5.0 s and 0.0225 M at t = 650.0 s. What is the average rate of... more
Follows • 1
Expert Answers •1

06/27/22

605.0 mL of 2.40 M H2SO4
How many moles of solute are present in the following solutions?
Follows • 1
Expert Answers •1

06/24/22

The radius of a barium atom is 217 pm. How many barium atoms would have to be laid side by side to span a distance of 3.15 mm?
The radius of a barium atom is 217 pm. How many barium atoms would have to be laid side by side to span a distance of 3.15 mm?
Follows • 1
Expert Answers •1

06/23/22

calculate the ph of [H30+]=4.5 x10-2M
pls provide all steps have no idea how to do this thank you
Follows • 1
Expert Answers •1

06/23/22

calculate the PH of [OH-]=5.9x 10-3 M
pls provide steps so i can learn... have never done this before and thank you
Follows • 1
Expert Answers •1

06/22/22

Find actual atomic mass of helium
Follows • 1
Expert Answers •2

06/19/22

General Chemistry 2
Identify each category of substance as soluble or insoluble in water. Most halide (Br-, Cl-, and I-) salts Choose...Soluble Insoluble Most carbonate and phosphate salts Choose...Soluble... more
Follows • 1
Expert Answers •1

06/19/22

General Chemistry 2
When solutions of silver perchlorate, AgClO4(aq), and ammonium iodide, NH4I(aq), are mixed, a solid precipitate forms, indicating a reaction.Which species should appear in the net ionic equation... 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.