Chemistry

Can some of you guys give me the Hexane combustion equation?
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Determine the mass of CaCO3 required to produce 40.0 mL CO2 at STP. Hint use molar volume of an ideal gas (22.4 L)
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The primary function of a scuba regulator is to: Reduce high-pressure gas in the scuba cylinder to a more breathable intermediate pressure. Reduce high-pressure gas in the scuba cylinder to ambient (surrounding) pressure. Provide a diver with a continuous flow of oxygenated air. None of the above.
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When salt is added to water, all of the following happens except? A. The salt breaks into positive chlorine ions and negative sodium icons B. the positive part of the water molecule is attracted to the negative ions C. The negative part of the water molecule is attracted to the positive ions D. The water molecules surround the dissociated ions
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Which is not a characteristic of all metals? Select one: a. soft and easy to cut b. Good electrical conductors c. Ductile and malleable
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21. What are the two main ways of working with clay?
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Who invented the Periodic table? And why Periodic tables are useful?
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To refine aluminum from its ore, aluminum oxide is electrolyzed to form aluminum and oxygen. At which electrode does oxygen form? options: A) Both the anode and the cathode B) Cathode C) Neither electrode D) Anode
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Methanol liquid burns readily in air. One way to represent this equilibrium is: 2 CO2(g) + 4 H2O(g)2 CH3OH(l) + 3 O2(g) We could also write this reaction three other ways, listed below. The equilibrium constants for all of the reactions are related. Write the equilibrium constant for each new reaction in terms of K, the equilibrium constant for the reaction above. 1) CH3OH(l) + 3/2 O2(g) CO2(g) + 2 H2O(g) K1 = 2) CO2(g) + 2 H2O(g) CH3OH(l) + 3/2 O2(g) K2 = 3) 2 CH3OH(l) + 3 O2(g) 2 CO2(g) + 4 H2O(g)
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A laboratory technician combines 35.9 mL of 0.258 M chromium(II) chloride with 35.8 mL 0.338 M potassium hydroxide. How many grams of chromium(II) hydroxide can precipitate
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Using these metal ion/metal standard reduction potentials Cd2+(aq)|Cd(s) Zn2+(aq)|Zn(s) Ni2+(aq)|Ni(s) Cu2+(aq)/Cu(s) -0.40 V -0.76 V 0.25 V +0.34 V Calculate the standard cell potential for the cell whose reaction is Ni2+(aq) + Zn(s) Zn2+(aq)+ Ni(s)
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WILL GIVE BRAINLIEST, Which of the following would have the greatest amount of surface area? A. 1 cubic foot of watermelons B. 1 cubic foot of matchbox cars C. 1 cubic foot of loose sand D. A 1 cubic foot block of concrete
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8.310x10^2 7.210x10^1[?]x10^[?]
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A student is reading the volume from a standard 50-mL buret identical to what you used in the lab. The bottom of the meniscus is exactly on the 20-mL line. What should she record as the correct volume
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Suppose a student completes an experiment with an average value of 2.9 mL and a calculated standard deviation of 0.71 mL. What is the minimum value within a 1 SD range of the average
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Which of the following reactions are possible if sodium is more reactive than aluminum, 3 iron, and lead?Reaction I: Sodium + Aluminum chloride Sodium chloride + Aluminum Reaction II: Sodium chloride + Iron Iron chloride + SodiumReaction III: Sodium + Lead chloride Sodium chloride + lead
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can you catch coronavirus from F.A.R.Ts?
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what is an example of mechanical energy converting to heat energy?
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Use the potential energy diagram shown to answer the following: Which letter shows the activation energy(without use of a catalyst)
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Three determinations were made of the following percentage of oxygen in mercuric oxide. The results were 7.40%, 7.43%, and 7.35%. What was the average percentage?
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Why don't siblings look exactly alike
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Which of the following do we need to know in order to calculate pH during an acid-base titration of a strong monoprotic acid with a strong monoprotic base? Select all that applya. the concentration of the acid b. the concentration of the base titrant c. the initial volume of the acid solution d. the volume of the titrant used
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What happens during an alpha decay?
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Perform the forlowingmathematical operation, andreport the answer to the correctnumber of significant figures.4568/13 = [?]
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