Chemistry

which phase does best describe the side of the moon that faces earth???I WILL MARK BRAINLIEST THIS IS IMPORTANT
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sonar measures underwater distances by using?
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The liver, kidneys, and brain arise fromwhich germ layer(s)
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What is the freezing point of a 2.00 m solution with phenol asthe solvent?
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How many moles of gas fill a 2.2 L vessel with a pressure of 1.2 atm at 25.0 C? P= V=n=R=T=Formula:
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What are some true statements about light
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What is the hydronium ion concentration of a 0.100 M acetic acid solution with Ka = 1.8 10-5? The equation for the dissociation of acetic acid is: CH3CO2H(aq) + H2O(l) H3O+(aq) + CH3CO2-(aq) What is the hydronium ion concentration of a 0.100 M acetic acid solution with Ka = 1.8 10-5? The equation for the dissociation of acetic acid is: CH3CO2H(aq) + H2O(l) H3O+(aq) + CH3CO2-(aq) 1.3 10-2 M 4.2 10-2 M 1.3 10-3 M 4.2 10-3 M
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Show ur working:What mass of sulfur trioxide is formed from 96g of sulfur dioxide?2 SO2+O2 > 2 SO3
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A calcium atom differs from a calcium ion in that the atom has a greaterA)number of electronsB)number of protonsC)atomic numberD)mass number
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aight imma let you guys i
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6. Bacteriorhodopsin is an integral membrane protein that uses solar energy (absorbed by its retinal chromophore) to pump protons out of the cell against an electrochemical gradient. Re-entry of the protons into the cell (down the gradient through its ATPase) is then used to drive the synthesis of ATP from ADP and Pi. Consider the following conditions: intracellular pH is 9.4 and extracellular pH is 6.4, and there is a transmembrane electrical gradient of 120 mV (negative inside). The concentration of intracellular [ATP] = 1 mM, [ADP] = 50 M, and [Pi] = 2 mM, and G for ATP hydrolysis is -30.5 kJ/mol. Temperature is 27 C. a. What is the energy cost of pumping one mole of H+ out of the cell? b. What is the minimal number of H+ that must re-enter the cell through the ATPase to provide sufficient energy to synthesize each ATP? Explain how you arrived at this answer quantitatively, of course.
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Reduce the following equation tonet ionic equation:2Na+ + SO42- +Ba2+ + 2Cr 2Na+2Cr +BaSO4A. 2Na+ + 2Cl 2NaClB. SO_2- +Ba2+ BaSO4C. 2Na+S02- Na2SO4
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What mass of calcium chloride is needed to prepare 2.657 L of a 1.56 M solution?
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An ion with a -2 charge has? A) one missing protein B) two missing protons c) two missing electrons D) two extra electrons
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Consider mixing a liquid with a vapor pressure of 100 torr with an equimolar amount of a liquid with a vapor pressure of 200 torr. The resulting solution would be predicted to have a vapor pressure of 150 torr if it behaved ideally. If, however, the interactions between the different components are not similar we can see positive or negative deviations from the calculated vapor pressure. An actual vapor pressure greater than that predicted by Raoult's law is said to be a positive deviation and an actual vapor pressure lower than that predicted by Raoult's law is a negative deviation.Part A Imagine a solution of ftwo liquids in which the molecules interact less favorably than they do in the individual liquids Will this solution deviate posltively from, deviate negatively from, or idealy follow Raouit's law?a. It will deviate positively. b. It will deviate negatively. c. It will be an ideal solution Part B Imagine a solution of two iquids in which the molecules interact more favorably than they do in the individual liquids Will this solution deviate positively from, deviate negatively from, or ideally follow Raoult's law?a. It will deviate positively. b. It will deviate negatively. c. It will be an ideal solution
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How to make isopropyl alcohol
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In most mirrors, the virtual image appears to come from behind the mirror. True False
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Explain why a small magnet will stick to a refrigerator door, but a nail will not stick.
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When does boiling occur?
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When you add a controlled amount of substance known as an impurity to a pure semiconductor, its conductivity increases. This process is known as doping. The addition of an impurity can increase or decrease the number of available electrons. If the number of electrons is increased, the extra electrons conduct electricity. If the number of electrons is decreased, a vacant hole is created. The adjacent electron enters the vacant hole and conducts electricity. Thus, it seems like the holes act as charge carriers. They are considered to be positive charge carriers. Depending upon the charge carriers that conduct electricity, there are two types of semiconductors: p-type semiconductors and n-type semiconductors.Which of the following statements are correct with respect to semiconductors? a) The addition of group 3A elements to group 4A semiconductors decreases the conductivity of the group 4A semiconductors. b) The conductivity of semiconductors can be increased by the doping process. c) As the temperature increases, the conductivity of semiconductors decreases. d) The addition of group 5A elements to group 4A semiconductors increases the conductivity of the group 4A semiconductors. e) Holes are charge carriers in p-type semiconductors. f) Electrons are charge carriers in n-type semiconductors.
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What is the molarity of sodium hydroxide solution made by combining 2.0 L of 0.60NaOH With 495 mL 3.0 M NaOH? Assume the volumes of the two solutions to be additive___M
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A pelican is born with a larger bill than other pelicans of the same species. When this pelicanbreeds, some of its offspring also have larger bills. What is the most likely explanation for thelarger bills in the pelican and its offspring?Inheritance of an quoted traitA mutationNatural selectionA change in diet
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5.UT---Urut points)Which of the following explains the process of radiation?5.1when heat gets transferred through electromagnetic waves that move throughspace5.1when heat gets transferred through objects that are touching5.1when heat gets transferred through a liquid or a gasO when the measurement of heat in the atmosphere goes down
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Which sentence best describes part of the process for generating electricity in a nuclear power plant?A.Atoms Join together to produce water molecules.B.An atom releases electrons, producing an electric current.C.Protons and neutrons Join together to create atoms.D.Heat is released when atomic nuclel split.
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