Chemistry

76.33 grams of NaCl were collected after experiment. How many moles wereproduced?
1 Answer
compare a rigid container such as a glass bottle with a flexible container, such as an air bag. describe how the type of container affects how the preassure of the gas inside the container can vary.
1 Answer
which type of chemical formula tells how many atoms of each element are in a molecule but does not indicate their arrangement?
1 Answer
a rigid cylinder contains a sample of gas at stp. what is the pressure of this gas after the sample is heated to 410 k?
2 Answers
Which of the following best describes a star? A star is a celestial body - composed of rock and metal with a very high density. that is too big to be an asteroid, but too small to be a planet. that rotates on an axis and revolves around the Sun composed of gases that emit light due to nuclear reactions.
1 Answer
what type of inter-molecular force arises from instantaneous dipole moments?a. hydrogen bondingb. dipole-dipole bond c. ion-dipole interactions d. ion-induce dipoles e. London Dispersion Forces
1 Answer
Acetic acid (HC2H3O2) is the active ingredient in vinegar. Calculate the mass percent composition of H in acetic acid. Express the mass percent composition to four significant figures.
1 Answer
calculate the volume of 0.200m naoh (in ml) needed to completely react with 50.00 ml of 0.0500m ch3cooh.
1 Answer
what physical process is primarily responsible for the purification achieved during recrystallization?
1 Answer
For which of the following reactions is Hrxn equal to Hf of the product(s)? You do not need to look up any values to answer this question.Check all that apply. 2Na(s)+F2(g)2NaF(s) 2H2(g)+O2(g)2H2O(g) Na(s)+12F2(l)NaF(s) Na(s)+12F2(g)NaF(s) H2(g)+12O2(g)H2O(g) H2O2(g)12O2(g)+H2O(g)
1 Answer
Net ionic equation of evolved gas through lime water
1 Answer
in an equilibrium mixture at 500k, the partial pressure of pcl 5 is 0.860 atm, pcl 3 is 0.350 atm, and cl 2 is 1.22 atm. calculate the equilibrium constant (k p ) for this reaction.
1 Answer
A face-centered cubic unit cell is the repeating unit in which type of crystal packing:__________
1 Answer
Atmospheric pressure on the peak of Mt. Everest can be as low as 150 mm Hg, which is why climbersneed to bring oxygen tanks for the last part of the climb. If the climbers carry 10.0 liter tanks with aninternal gas pressure of 3.04 x 10 mm Hg, what will be the volume of the gas when it is released from thetanks?
1 Answer
Valdez notices that a wooden door in his house is difficult to open in the summer, but not in the winter. Valdez explains to Tony that the temperature of the door changes throughout the year. Tony says there is no way to measure the temperature of a solid because solids do not have a lot of thermal expansion. Valdez disagrees. Develop an argument supporting or opposing Tony's claim. Support your argument with at least two pieces of evidence.
1 Answer
once you have extracted caffeine, how will you confirm that it is caffeine? how will you test the purity of your caffeine? select three techniques to characterize your substance and describe what information each technique can provide you.
1 Answer
select the correct name for the compound. a five membered ring with an oxygen and four carbons. the ring has two double bonds, and the ring oxygen has two lone pairs. the name is pyrrole
1 Answer
quizler which toxic substance is responsible for the symptoms of flushing syndrome? group of answer choices alcohol dehydrogenase acetaldehyde acetaldehyde dehydrogenase acetate
1 Answer
how would your calculations of the concentration of [fescn]2 been affected if the cuvette you used had a 1.5 cm path length rather than the 1.0 cm value you were told to use?
1 Answer
a triprotic acid h3a has pka's of 2.50, 5.75, and 9.25. what is the pkb for the base a3-? if you need to, assume the solution is at 25 oc, where the kw is 1.00x10-14.
1 Answer
find the percent by volume concentration for 50.00 ml of a 50% nacl solution added to more solvent to make 120.00ml of solutions
1 Answer
you are given a small bar of an unknown metal. you find the density of the metal to be 10.5 g/cm3. an x-ray diffraction experiment measures the edge of the unit cell as 409 pm. assuming that the metal crystallizes in a face-centered lattice, what is the metal most likely to be?
1 Answer
upon combustion, a compound containing only carbon and hydrogen produces 2.77 gco2 and 0.851 gh2o . find the empirical formula of the compound.
1 Answer
what is the name of a molecule that differs in the number of electrons, but has the same number of protons?
1 Answer