Answers created by zhirou

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• When the temperature of the matter increases,intermolecular forces? A)increase B)decreases C Remain same D)None
  
• In a chemical reaction you collect 1L Hydrogen gas at STP. How many moles of hydrogen gas did you collect?
  
• How is hydrogen bonding similar to dispersion forces?
  
• The particles which of the following gases has the highest/lowest average speed? Which gas particles have the highest/lowest average kinetic energy? a.) argon at 20°C. b.)nitrogen at 20°C b.) nitrogen at 100°C. c.) helium at 100°C
  
• As the strength of intermolecular forces increases, the ease of evaporation????
  
• When 1414 J of heat energy is added to 38.7 g of ethanol, C2H6O, the temperature increases by 14.9 °C. Calculate the molar heat capacity of C2H6O?
  
• Are gas molecules assumed to exert no forces of attraction or repulsion on each other?
  
• What is the molar mass of adrenaline (C9H13NO3) ?
  
• A 2.0 liter bottle can withstand a pressure of 5.0 atm. 120 mL of liquid ethanol, #"C"_2"H"_5"OH"#, (density 0.789 g/mL), is poured into the bottle and sealed. The bottle is heated to 100 C, changing all the liquid to gas. Will the bottle explode?
  
• A gas sample occupies volume of 2.5 L at a pressure of 1.5 atm. What would be the volume of gas if its pressure is reduced to 1 atm at the same temperature? Find the Given, UnknownLNDP/LSNF with a solution and answer. Thank you.
  
• When the temperature of a rigid hollow sphere containing 685 L of He gas is held at 348OC, the pressure of the gas is 1.89 x 103 kPa. How many moles of He does the sphere contain?
  
• If the temperature of a gas rose from standard temperature to 35 degrees Celsius, what was the initial pressure applied to it if the final pressure is 72.5 psi?
  
• A volume of a gas is 20.4 L when the pressure is 925 kPa. At constant temperature, a change in pressure causes the volume of the sample to change. If the new volume is 30.6 L, what is the new pressure?
  
• At what temperature will 0.654 moles of neon gas occupy 12.30 liters at 1.95 atmospheres?
  
• Wat is the ratio between masses of carbon and oxygen in CO2??
  
• What is the empirical formula and empirical formula mass for C9H27O9?
  
• If light has a wavelength of 555 nm, what is the energy of this light expressed with units of kJ/mol?
  
• How many protons, neutrons, and electrons are in Amethyst?
  
• Is there any lone pair electrons in sp2 hybridization?and how does these lone pair electrons change the look of a molecule?
  
• What are the resonance isomers for #CO_2#?
  
• Is combustion enthalpy change always negative?
  
• Convert 345 moles of H20 to molecules?
  
• Which of the following are physical changes and which are chemical changes? Rotting Food Fermenting Charcoal Burns in a Grill Decaying Plant Cutting Vegetables Melting Butter
  
• What is the empirical formula for a compound which contains 80.2 g zinc and 19.8 g oxygen ?
  
• How many moles are in 9.8 grams of calcium?
  
• Question #b5f73
  
• What is the equation of reaction between magnesium nitrate and ammonium hydrogen phosphate??
  
• How many moles of potassium chlorate were necessary to produce eight moles of oxygen?
  
• How many grams of oxygen are produced if you have 10.0 grams of water available for the following reaction? 2H2)-> 2H2 + O2
  
• How many atoms in each element?
  
• Question #95e91
  
• The elemental analysis of penicillin is, #"carbon, 57.47%; hydrogen, 5.43%; nitrogen, 8.38%; oxygen, 19.14%; sulphur, 9.59%."# What is the empirical formula?
  
• Question #d1400
  
• Question #cca44
  
• Question #6ab87
  
• Calculate molecular weight of pantothenic acid vitamin B5 C6H17NO5? 2) the recommend Daly allowance of niacin 15 mg. How many moleculars of vitamin B3 does the government recommend that you ingest every day?
  
• Question #4a62a
  
• Question #136e3
  
• Question #ef7b2
  
• How many silicon-30 atoms are found in this plate?
  
• Question #b180a
  
• Question #4066d
  
• Question #e60d6
  
• Calculate the heat absorbed by 125 g of water (SH = 1.00 cal/g°C) when the temperature rises from 21.0°C to 35.0°C?
  
• What is the mass percentage of the gold in the alloy? What is the mass percentage of the palladium in the alloy?
  
• How many moles of each atom are present in a #1.01*g# mass of antifreeze, #C_3H_6O_3#?
  
• Question #f3e9a
  
• Question #caa00
  
• How many electrons can the fourth energy level hold according to Niels Bohr?
  
• Question #d0748
  
• Question #a75e0
  
• Question #ca262
  
• What are the electron configurations of lithium, oxygen, nitrogen, and potassium?
  
• Could elemental copper react with sulfuric acid?
  
• Question #c5653
  
• Question #64391
  
• How many moles of magnesium atoms are there in 0.2g of the metal?
  
• How many unpaired electrons are there in lead(I)?
  
• What separates metals and non-metals with respect to the Periodic Table?
  
• What's the electron configuration for Oganesson? Atomic number-118
  
• Question #f2df8
  
• What is the equation for a parabola with a vertex at (5,-1) and a focus at (5,-7)?
  
• Redox Reaction Help?
  
• Question #d2fba
  
• Question #c9ba9
  
• When1.42g of iron reacts with 1.80g of chlorine, 3.22g of FeCl2(s) and 8.60kJ of heat is produced.What is the enthalpy change for the reaction when 1 mole of FeCl2(s) is produced?
  
• Question #a511c
  
• Question #d87eb
  
• Question #648a7
  
• Question #8688d
  
• How to find c? Please read the image and help me please!
  
• Question #05a9c
  
• Question #5f1dd
  
• Question #fe76d
  
• How many neutrons are in a nucleus that has 45 protons and a mass number of 160?