05/08/21

Air is made of nitrogen, carbon dioxide, and small amounts of other gases. What is the pressure of O2 at 1 atm if PN2 = 593.4 mm Hg, PCO2 = 3.0 mm Hg, and Pothers = 7.1 mm Hg?
Follows • 1
Expert Answers •1

05/07/21

If 5.78 moles of calcium nitrite reacts with excess cesium, how many moles of cesium nitrite can be made
No clue, how to work this out.
Follows • 1
Expert Answers •1

05/07/21

use conversion factors to perform the following conversions
what mass would 13.2 liters of carbon dioxide gas have at STP?
Follows • 1
Expert Answers •1

05/07/21

use conversion factors to perform the following conversions

what is the mass of 324 moles of copper(II) chloride?
Follows • 1
Expert Answers •1

05/07/21

A gas occupies 0.9 L at a temperature of 27.0 °C. What is the volume at 132.0 °C?
Follows • 1
Expert Answers •1

05/07/21

What is the pressure (in atm) of hydrogen gas in the 20.0 L headspace of a reactor vessel when 2.84 kg sodium is reacted with excess water at 50.0°C?
2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g)
Follows • 1
Expert Answers •1

05/07/21

Find the answer in degrees.
Outside temperature over a day can be modeled as a sinusoidal function. Suppose you know the high temperature of 68 degrees occurs at 5 PM and the average temperature for the day is 60 degrees.... more
Follows • 1
Expert Answers •1

05/07/21

college lever astronomy
What is the distance and apparent magnitude for Antares?802 pc and 1.32.7 pc and -1.5170 pc and 1.0197 pc and 0.4
Follows • 1
Expert Answers •1

05/07/21

college lever astronomy
What is the brightness ratio for Antares at 10 pc?1/2891/17^2none of theseeither of these
Follows • 1
Expert Answers •1

05/07/21

college lever astronomy
The true distance to Sirius A (simply called Sirius from here on) is about 2.5 parsecs.TrueFalse
Follows • 1
Expert Answers •1

05/07/21

astronomy college level
Based on the Inverse Square Law, what is the brightness ratio for Sirius?1:1616:1any of these1/16
Follows • 1
Expert Answers •1

05/07/21

astronomy college level
What is the magnitude difference for Betelgeuse at 10 pc?6.5063882.5197^2
Follows • 1
Expert Answers •1

05/07/21

astronomy college level
What is the approximate Absolute Magnitude for Sirius, now that we have corrected for its distance?2.5-1.51.51.0
Follows • 1
Expert Answers •1

05/07/21

How many moles of oxygen gas are needed to produce 2.14 moles of water?
Follows • 1
Expert Answers •1

05/06/21

find the exact value when cos theta= -1/3, pi/2<theta<pi

Also find sec theta, sin theta, tan theta, csc theta, and cot theta
Follows • 1
Expert Answers •1

05/06/21

If 40 sodium azide molecules are used, how many molecules of nitrogen gas would be released by the first reaction.(air bag)
Follows • 1
Expert Answers •2

05/06/21

Based in Magnesium being the limited reactant, calculate the theoretical yield and Percent yield. Then determine the average percent yield in the two trials.

Data Trial 1 Trial 2 Mass of empty crucible with lid 26.694g 26.693g Mass of Mg metal, crucible, and lid 26.953g 27.002g Mass of MgO, crucible, and lid  27.117g 27.198g Magnesium is the... more
Follows • 1
Expert Answers •1

05/06/21

Practice #6 Gram to gram Ratio Stoichiometry
Copper I iodide , Cul , is not stable enough to last long in storage , so it is generally made just prior to use . In can be prepared from copper sulphate and hydriodic acid by the following... more
Follows • 1
Expert Answers •2

05/06/21

Mechanical Energy: Kinetic Energy (EPE)
A spring stores 77J of potential energy when it is stretched by 7cm. What is the spring constant? 
Follows • 1
Expert Answers •1

05/04/21

In a lab you react 4.3 mols of hydrogen gas with 2.3 mols of oxygen gas to form water. You collect 12g of water. What is the percentage yield?
Follows • 1
Expert Answers •1

05/04/21

How many moles are in 30.2 g of Potassium Iodide?
Follows • 1
Expert Answers •1

05/03/21

How do I solve this?
An electron and a proton are separated by 1.50 × 10^-10 m. If they are released, which one will accelerate at a greater rate, and what is the magnitude of that initial acceleration?
Follows • 1
Expert Answers •1

05/03/21

How many grams are in 4.5 x 10^22 atoms of Copper(II) Sulfate?
Follows • 1
Expert Answers •1

05/03/21

hello please respond I desperately need help with my chemistry homework as soon as possible please

1.) For the reaction C + 2H2 → CH4, how many grams of hydrogen are required to produce 17 moles of methane, CH4 ?Round your answer to the nearest tenth. If you answer is a whole number like 4,... more
Follows • 1
Expert Answers •1

05/03/21

A person starts walking from home and walks:
4 miles East5 miles Southeast6 miles South2 miles Southwest4 miles EastThis person has walked a total of _______ milesFind the total displacement vector for this walk: _______If this person walked... 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.