Answers created by Edmund Liew

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• How many moles of potassium chlorate must be used to produce 6 moles of oxygen gas?
  
• What is a halogen atom?
  
• Can you help me balance this equation? As2S3 + K2Cr2O7 + H2SO4 = H3AsO4 + K2SO4 + Cr2(SO4)3 + H2O + SO2
  
• Question #85ee6
  
• How many moles of `NH_3` are produced when 18.5 grams of `N_2` gas reacts with excess `H_2` gas?
  
• What is the chemical formula for a dinitrogen trioxide molecule?
  
• How do you simplify `\frac{6}{6}\times \frac{3}{2}`?
  
• Question #7639c
  
• 8.5% of 5000 is what number?
  
• What is the molar mass of `Al(C_2H_3O_2)_3`?
  
• During a reaction, baking soda (`NaHCO_3`) is combined with calcium chloride (`CaCl_2`) in water. What is the balanced chemical equation for the reaction that occurred?
  
• Question #6cce1
  
• How many grams are there in 4.50 moles of `Ba(NO_2)_2`?
  
• How do you solve `y- ( - 22) = 63`?
  
• What is the formula for nitrogen dioxide?
  
• How do you solve `1.4x + 6.1= - 7.9`?
  
• How do you determine the atomic mass of an element?
  
• What is the molar mass of table salt (i.e. sodium chloride)?
  
• What is the percentage metal by mass in magnesium oxide?
  
• How do you solve `50- x - ( 3x + 2) = 0`?
  
• Seven times a number is the same as 12 more than 3 times the number. How do you find the number?
  
• Do metals have high electronegativity?
  
• How do you expand `(5y^4-x)^3`?
  
• Why do ionic bonds conduct electricity?
  
• How does ionic bonding affect conductivity?
  
• How do you convert 1000 g to kg?
  
• How do you add `204.965 +55.8`?
  
• What are the products of Potassium iodide + lead nitrate?
  
• How many people in Indonesia died in the tsunami and earthquake of Dec. 26, 2004?
  
• How many grams of `O_2` are in 5.0 mol of the element?
  
• What is the molar mass of lithium oxide, `Li_2O`?
  
• How many moles of oxygen gas will be formed from 6.45 g of potassium chlorate?
  
• What is `24+64`?
  
• How do you balance `P_4 + O_2 -> 2P_2O_3`?
  
• Is the equation `2C_8H_8 + 25O_2 -> 8CO_2 + 18H_2O` completely balanced?
  
• What is the name of `AlCl_3`?
  
• According to collision theory, what happens in a reaction without sufficient energy or correct orientation?
  
• What is an earthquake's magnitude?
  
• What type of reaction produces a precipitate?
  
• How do you solve empirical formula calculations?
  
• What is the molecular formula of a compound if its empirical formula is `CFBrO` and its molar mass is 381.01 g/mol?
  
• How do you simplify `4y^4 + 3y^2 + y^4`?
  
• Which is the formula mass of `Na_2SO_4`?
  
• What is the name of the compound whose formula is `H_2SO_4`?
  
• How do you find the formula mass of ammonium carbonate `(NH4)_2CO_3` ?
  
• What is collision theory?
  
• When was the biggest earthquake recorded in earth's history? Where was it? How strong was it?
  
• How much water is formed when 1.0 mol of `HCl` reacts completely with 1.0 mol of `NaOH`?
  
• Question #2a7bc
  
• What is the name of the highest active volcano in the world?
  
• How do you calculate the number of moles in 0.135 grams of `HNO_3`?
  
• How many molecules are present in 1296 g of dinitrogen pentoxide `N_2O_5`?
  
• How many grams are contained in 3.22 moles of dinitrogen tetroxide?
  
• How many grams are in 17.83 moles of carbon dioxide?
  
• Question #199ec
  
• Given the balanced equation, `2SO_2 + O_2 -> 2SO_3` , what is the molar ratio of `O_2` to `SO_3`?
  
• How can an empirical formula be interpreted?
  
• How many grams are contained in 2.00 mol of neon?
  
• What is the formula mass of ammonia?
  
• How do acids affect litmus?
  
• What is the mass of 4.50 mol `Fe`?
  
• Question #c7ba8
  
• For the reaction represented by the equation `N_2 + 3H_2 -> 2NH_3`, how many moles of nitrogen are required to produce 18 mol of ammonia?
  
• Question #c67b3
  
• What are the layers of the earth made of?
  
• How many moles are in 200 grams of fluorine?
  
• How do you calculate the empirical formula of a compound formed from 3% `C`, 0.3% `H`, and 96.7% `I`?
  
• What is the percentage of lithium in lithium carbonate `Li_2CO_3`?
  
• How do you simplify `2a * -a`?
  
• How do you solve `-4b = 15`?
  
• What are three types of plate boundaries where volcanic eruptions can occur?
  
• Question #7be8c
  
• How many hydrogen atoms are in each formula unit of calcium bicarbonate `Ca(HCO_3)_2`?
  
• How many grams of sodium is present in 2 moles?
  
• How many grams of `Fe_2O_3` are there in 0.500 mole of `Fe_2O_3`?
  
• How many grams of hydrogen are necessary to react completely with 50.0 g of nitrogen in the reaction `N_2+3H_2->2NH_3`?
  
• What is percent composition of ethanol ( `C_2H_5OH` )?
  
• How do you write `8times10^6` in standard form?
  
• If 3.00 moles of `H_2O` are produced, how many grams of hydrogen gas are used?
  
• What is the standard form of `y= (x+7)(x-8)^2`?
  
• How do you calculate empirical formula of a compound?
  
• Why might an an earthquake have more than one intensity value? Where would the higher value be found and why?
  
• How does the build-up of stress in the earth's crust result in an earthquake?
  
• Where do Earth's plates slide past each other?
  
• How do you write `8.5 times 10^3` in standard notation?
  
• In the reaction `Fe_2O_3 + 3CO -> 2Fe + 3CO_2`, what is the total number of moles of `CO` used to produce 112 grams of iron?
  
• What is the molecular formula of a compound if its empirical formula is `NO_2` and its molar mass is 138.02 g/mole?
  
• What is the number of grams in 7.19 moles of `BaSO_4`?
  
• How does acid affect teeth?
  
• How much work does it take to raise a `7 kg` weight `36 m`?
  
• A train covers 60 miles between 2 p.m. and 4 p.m. How fast was it going at 3 p.m.?
  
• What is the role of DNA?
  
• What are the advantages of sexual and asexual reproduction?
  
• How do you simplify `4 + 6 (3m + 2)`?
  
• What is the number of moles in .197 g `As_2O_3`?
  
• Question #8b7ec
  
• How do you factor completely `2x^2 + 36x + 162`?
  
• What is the formula mass for sulfur dioxide?
  
• How does a base differ from an acid?
  
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