Master Chemistry with Fun Quizzes & Brain Teasers!

Find the pH of HCl with a concentration of 0.00006MRound to the nearest whole number
1 Answer
What is the molarity of 10g of carbon in a 500L solution?
1 Answer
Convert 7 mol carbon to grams.
1 Answer
Use one of your experimentally determined values of k, the activation energy you determined, and the Arrhenius equation to calculate the value of the rate constant at 25 C. Alternatively, you can simply extrapolate the straight-line plot of ln(k) vs. 1/T in your notebook to 1/298, read off the value of ln(k), and determine the value of k. Please put your answer in scientific notation. slope=-12070, Ea=100kJ/mol, k= 0.000717 (45 C), 0.00284 (55 C), 0.00492 (65 C), 0.0165 (75 C), 0.0396 (85 C).
1 Answer
how do convection currents help make underwater mountains
1 Answer
how many moles in 2.5 liters of methane gas
2 Answers
A double replacement reaction is a reaction in which one element replaces a similar element within a compoundTrue or false
1 Answer
True or False: Solar energy is changed into electrical energy in a solar power tower system using mirrors called heliostats that concentrate sunlight onto a central tower.TrueFalse
2 Answers
How do you draw the following structural formulas: 2,4-dimethylhexane; 4-methyl-2-pentene; 4-chloro-7-methyl-2-nonyne
1 Answer
explain how iodine can be obtained from iodine-sodium chloride mixture
1 Answer
will give brainliest for correct answer!!!Which particles are gained and lost during a redox reaction?A)electronsB)protonsC)neutronsD)positrons
1 Answer
What amount of moles does 60.5 L of carbon dioxide occupy at 2.15 atm and 25 degrees C?4.3 moles5.3 moles9.3 moles2.5 moles
1 Answer
if the ph of phosphoric acid is 1.5 what is its molarity?
1 Answer
If electrons are collectively compressed into a very small volume (e.g., within the core of a dying white dwarf star) where quantum mechanical considerations become important in preventing one electron from occupying space near to a second electron (Pauli exclusion principle), what is the result?
1 Answer
A solution is prepared by dissolving 0.26 mol of hydrazoic acid and 0.26 mol of sodium azide in water sufficient to yield 1.00 L of solution. The addition of 0.05 mol of HCl to this buffer solution causes the pH to drop slightly. The pH does not decrease drastically because the HCl reacts with the ________ present in the buffer solution. The Ka of hydrazoic acid is 2.5 x 10^-5.
1 Answer
Which of the molecules in the figure has the most carbon atoms?Which of the molecules in the figure has the most carbon atoms?Ethylene glycolOxygenWaterCarbon dioxideAspirinEthanolPrevious Answers CorrectPart BHow many are there in that molecule?Express your answer as a signed integer.Number of carbon atoms =
2 Answers
How do you draw acetone using a Bohr model?
1 Answer
Consider the chemical equations shown here.P4(s)+3O2(g)--->P4O6(s) H1 = -1,640.1 kJP4O10(s) P4(s) + 5O2(g) H2 = 2,940.1 kJWhat is the overall enthalpy of reaction for the equation shown below?Round the answer to the nearest whole number.P4O6(s) + 2O2(g) --->P4O10(s)
1 Answer
A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas reaction vessel. The vessel is a stainless-steel cylinder that measures wide and high. The maximum safe pressure inside the vessel has been measured to be . For a certain reaction the vessel may contain up to of carbon monoxide gas. Calculate the maximum safe operating temperature the engineer should recommend for this reaction. Write your answer in degrees Celsius. Be sure your answer has the correct number of significant digits.
1 Answer
The original fluid mosaic model stated that membrane proteins move freely in the plane of the lipid bilayer via lateral diffusion "like protein icebergs in a sea of lipids." Since its initial description in 1927, the fluid mosaic model has been refined. Complete the statements that describe some of the refinements of the fluid mosaic model as it relates to protein mobility. Choose the answer that best completes each sentence: Membrane (lipid) rafts, Vesicles, Cytoskeletal elements, Protein-protein interactions, Bilayer leaflets.1) ______ may form a locally rigid, non-lipid matrix surrounded by the fluid lipid matrix. 2) ______, membrane domains rich in sphingolipids and cholesterol, are regions with reduced lipid and protein mobility. 3) ______ can be attached to proteins or can "fence in" proteins, reducing protein mobility.
1 Answer
I need help with this i'm really dumb.Balancep4+o2 ----> p4o10
1 Answer
Determine the mass of oxygen produced in the decomposition of 25.0 g of potassiumchlorate, which would also yield the formation of potassium chloride. Show steps please!
1 Answer
Calculate the concentration, in moles per litre, of a solution formed when 13.0 g of calcium hydroxide is dissolved in 5.0 L. Please show work!
1 Answer
Currently, electricity from solar panel systems is cheaper than electricity produced from fossil fuel or nuclear power plantsTrueFalse
1 Answer