Chemistry

What is the H 2 : H2O molar ratio?
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What frequency does a photon of wavelength 4.5 x 10-4 m have?A. 6.67 x 1011 HzB. 1.47 x 10-30 HzC. 2.98 x 10-37 HzD. 1.35 x 105 HzSUBMIT
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What happens with electrons in a non-polar bond? Brainliest!!!!!!!
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Based on this information, which hypothesis best predicts how a change to the gene could affect people who do not produce enough lactase?
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In the process of photosynthesis, plants take in carbon dioxide (CO2) from the atmosphere and water (H2O) from the soil. Using the energy of sunlight, plants build molecules of glucose (C6H12O6) and oxygen (O2).Select one:a.Plants absorb Carbon Dioxide which increases the amount of carbon in the atmosphere.b.Plants produce Carbon Dioxide which increases the amount of carbon in the atmosphere.c.Plants absorb Carbon Dioxide which reduces the amount of carbon in the atmosphere.d.Plants produce Carbon Dioxide which reduces the amount of carbon in the atmosphere.
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A 12.8-g sample of sodium completely reacts with 19.6 g of chlorine to form 32.4 g of sodium chloride. These data are A 12.8-g sample of sodium completely reacts with 19.6 g of chlorine to form 32.4 g of sodium chloride. These data are blank with the law of conservation of mass because the mass of reactants blank the mass of products. with the law of conservation of mass because the mass of reactants A 12.8-g sample of sodium completely reacts with 19.6 g of chlorine to form 32.4 g of sodium chloride. These data are blank with the law of conservation of mass because the mass of reactants blank the mass of products. the mass of products.
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The liquid metal at room temperature (a) Mercury (b) Sodium (c) Magnesium (d) Silver
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why is the air so warm at the equator
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1. What pressure would be exerted by 46.0grams of hydrogen gas placed into a 3.00 L container at25C?
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If 27.3g of C8H18 is combusted, according to the equation below, what mass of water is produced? 2C8H18 + 25O2 --> 16CO2 + 18 H2O,molar masses: C8H18 = 114.3 g/mol O2 = 32.0 g/mol CO2 = 44.0 g/mol H2O = 18.0 g/mol
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Help. Ill give brainliest.
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The strength of an acid is affected by the polarity of the bond connected to the acidic hydrogen. The more highly polarized this bond, the more easily the hydrogen is ionized. Electronegative atoms or groups of atoms present in the structure of an acid can act to withdraw electrons and produce additional polarization. Two common groups of acids to which this principle can be applied are oxoacids and carboxylic acids. In the latter group, the length of the hydrocarbon chain in a carboxylic acid has very little effect on acid strength Longer chains may slightly diminish acidity. Bases act as hydrogen ion acceptors because of the unshared electron pass in their structure. Any group present in a base that withdraws electrons makes these electron pairs less available to accept a hydrogen ion. In contrast, any group that can act as an electron donating group such as hydrocarbon groups (usually represented as II) can increase the base strength. Thus, the addition of electronegative atoms or groups of atoms to the structure of a base decreases the base strength and electron donating groups increase base strength. Many common weak bases are derivatives of ammonia, in which H atom(s) of NH_2 are replaced with other groups. Arrange the following oxoacids in order of decreasing acid strength. Rank from strongest to weakest acid. HBrOHClOHClO3HClO2
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The answer to this question
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Which of the following has had the most negative effect on Earth's ecosystems?A. establishment of air pollution standards.B. increase in human populationC. recycling glass, plastic, and metalsD. use of natural predators to control pest insects.
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In a city, the buildings, streets, air,and water are all ______parts of the environment.
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Which of the following statements is true about rain falling from clouds?*
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Name the following alkene:CH3C = CH21CH3A. 2-methyl-1-propeneB. 2-methyl-2-propeneC. 1-propyl-2-metheneD. 2-methyl-1-propanePls help
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Identify one factor represented in the diagram that is used to classify the ten types of clouds
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EDTA is a very common ligand, which like oxalate, binds to many metals. However, unlike oxalate, which forms two bonds, EDTA forms 6 bonds to the metal. A 0.2481g sample of marble was dissolved in 100 mL, and a 10.00 mL aliquot of the solution was titrated to an endpoint with 23.56 mL of 0.01052 M EDTA solution. What is the molecular weight of the marble
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__MgCl2 +_Na3PO4 -->NaCl_Mg3(PO4)2 +---In the reaction above, how many moles of sodium chloride would be producedif you started with 20 grams of magnesium chloride and excess sodiumphosphate? The equation is not balanced.(If anyone can answer in depth if appreciate it )
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WHAT CAN BE USED TO REPLACE OIL? help 30POINTS!!!!! ASAP
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A reaction is first order with respect to reactant A and second order with respect to reactant B. Starting with [A] = 0.175 M and [B] = 0.00250 M, the reaction rate is 2.83 x 105 M.S1. What is the rate constant k? Show your work.
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How many molecules of water are there in 10 lbs of water?
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Complete the missing information in the reactions. Then, label the reaction one of the following:Alpha DecayElectron CaptureBeta DecayPositron Emission.14N +0Type:2389223490Th +Type:15015N +7Type:803215Type:105Ag +47105Pd46Type:40Type:20I24494 Pu -Type: :
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