Questions asked by anitashower

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• You have a sample of Methane (CH4) with as mass of 32g. How much of that sample is Hydrogen?
  
• You have 1.6 x 1024 atoms of Bismuth. How many moles are present?
  
• How many water molecules are in #0.15# moles of #"H"_2"O"#?
  
• You have 1.45 Moles of Hydrogen. How many atoms are present?
  
• What is the empirical formula of a compound comprised of 1.75% hydrogen, 56.1% sulfur and 42.15% oxygen?
  
• You have 18g of Be for a sample of Beryllium Chloride. How many moles of Be are present?
  
• A compound contains 49.98g of C and 10.47g of H. The molar mass of the compound was measured to be 58.12. What is the empirical formula for the material? What is the molecular formula?
  
• How to use DeMoivre's Theorem to find the indicated power of (sqrt 3 - i)^6 ?
  
• Do formula mass and molar mass mean the same thing?
  
• You have 40g of MgCl2. How many atoms of Cl are in the sample?
  
• You have 3.0 Mol of CoCl2. What is the mass of the sample?
  
• There is a sample of 40g of MgCl2. How many atoms of Cl are in the sample?
  
• You have a 500Kg sample of Magnesium Chloride (MgCl2). What is the amount of Chlorine present in the sample in grams?
  
• You have a sample of material with the empirical formula of CH. The sample you have has a mass of 52.0g What is the molecular formula for the sample?
  
• From the equation 16Fe + S8 --> 8Fe2S3 How much Fe2S3 would be produced in grams if you started with 7.0g of Fe?
  
• With the Equation 6H2O + 6CO2 --> C6H12O6 + 6O2 How many grams of water are needed to make the above amount of glucose if you start with 88.0g of CO2?
  
• 6H2O + 6CO2 --> C6H12O6 + 6O2 How many grams of Glucose are made if you start with 88.0g of CO2?
  
• Cross product of #(2 hat i + 3 hat j) xx (5 hat i + hat j)# ?
  
• Cross product of (2,4) x (-6,3) ?
  
• Find the area of the parallelogram whose vertices are (-5,3) (8,6) (1,-4) and (14,-1) ?
  
• Cu + 2AgNO3 --> 2Ag + Cu(NO3)2 If a 20g sample of Copper (Cu) is used, what is the theoretical yield of silver?
  
• Fe + S --> FeS If we have .14 Mol of Fe and .27 Mol of S. Which is the limiting reactant? How many moles of FeS would be produced if the limiting reactant was used up?
  
• Convert the equation r = sin ⁡ θ + cos ⁡ θ to rectangular form?
  
• Convert the rectangular point (-1, 3) to polar form?
  
• Help solving these triangles?
  
• The temperature of a sample of water increases from 20.0 to 46.6 degrees C as it absorbs 5650J of thermal energy. What is the mass of the sample?