Chemistry

The air we breathe is a(n) _____.
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H IT H-C --H + The model above shows the structural formula for ethane. What is the chemical formula for ethane? OA. C2H6 OB. 2CH3 Oc. 8CH OD. C6H2
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The products of self-ionization of water areH+H20H+ and OH-OH-
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1. How many moles are in 3.50 grams of NaCl?0.0600 molO 203 molO 78.4 molO 0.156 mol
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Can someone answer this, NO ROBOTS!!!!
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What would happen to the position of the equilibrium when the following changes are made to the reaction below?2HgO(s) Hg(l) + O2(g)1.) The pressure on the system decreases.
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A 250mL beaker is submerged in a large container of Liquid A and turned upside down, and another 250mL beaker is submerged and turned upside down in a large container of Liquid B. Hydrogen H2 gas is bubbled into each upside-down beaker until 100mL of liquid has been displaced. The masses mA and mB of hydrogen inside each beaker is then chemically determined. Note for advanced students: you may assume the solubility of H2 in either liquid is very low.a. mx will be greater than my b. mx will be less than my c. mx will be equal to my d. It's impossible to predict whether mx or my will be greater without more information.
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Metallic bonding is sometimes referred to as a "sea of electrons." I sometimes picture is as cheerios (nuclei) floating around in milk (valence electrons). And while metallic bonding has the name "bond" it can be very different from Ionic and Covalent Bonds.In complete sentences describe how Metallic bonds are alike, and how they are different from the other bond types we have studied.
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Four metals were kept in contact with each other. The table below shows the initial temperature of the metals.Metal Initial Temperature30 CB42 C25 CD16CFrom which metal will heat flow into all the other metals?Metal AMetal BMetal CMetal D
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PLEASE HELP I'M SO DOOMED A balloon that contains 2.8 mol of helium gas has a volume of 31 L. If 3.5 g of helium is added, what will be the new volume of the balloon? Assume the temperature and pressure remain the same. The molar mass of helium is 4.00 g/mol.a) 186 L b) 70 Lc) 24 Ld) 41 LDo not post links
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can silver nitrate test the purity of water
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One mole of CO2(g) is expanding isothermally and reversibly from a volume of 0.100 dm3 to a volume of 100 dm3. Calculate the work in "kJ" of the expansion process if: 1/ the gas is considered real gas. (Hint: use the Van Der Waals equation for real gases to express the pressure in the work equation). 2/ The gas is considered perfect gas. Given: The constants for CO2(g) are: a= 3.59 atm L2/mol2, b= 0.0427 L/mol Answer: a) the expansion work for CO2 as real gas is W = kJ. b) the expansion work for CO2 as perfect gas is W = kJ.
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Which statement regarding this equation is TRUE?4Fe (s) + 3O2 (g) > 2Fe2O3 (s)There are 2 reactants.The coefficient on O2 is 8.Iron (III) oxide is a gas.There are 5 atoms of oxygen on the reactant side.
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Formula mass of Ca(NO2)2
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2. Suppose two astronauts were outside of the space shuttle orbiter while orbiting Earth. The audio speaker in the helmet of one of the astronauts quits working. The other astronaut is only one meter away, so she shouts a message to him. Can he hear her? Explain.
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Can someone help me I am stuck on this question it would mean the world if u helped me =) have a nice day!
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I need help please. No links/ irrelevant answers or I will report youData:2Fe(s) + O2(g) => 2FeO(s) H = -545.6 kJ4Fe(s) + 3O2(g) => 2Fe2O3(s) H = -1,643.6 kJ3Fe(s) + 2O2(g) => Fe3O4(s) H = -1,117.7 kJGiven the data above, determine the heat of reaction, H, for the reaction:2 Fe3O4(s) => 2 Fe2O3(s) + 2 FeO(s)
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Need help on science ASAP
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Conduction is a method of energy transfer within Earths systems. Describe an example of conduction, including where the energy transfer takes place and how conduction occurs.
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If you have 1.5 grams of silver nitrate, how many grams of silver couldyou produce?
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How many internal parts or organelles are there in a plant cell?please i need a answer!
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Which adaptation allowed gymnosperms and angiosperms to become the most dominant types of plants on earth?O pollenO flowersO seedsO fruit
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The driest desert on Earth is the several years to not receive any rainfall. desert. There it has been recorded for O Atacama Sahara (T) Antartic ( Gobi
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How many atoms are in 9.44 moles of Al?
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