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1. A compound whose empirical formula is CH3 has a molar mass of 30 g/mol. What is its molecular formula? (3 points)
2. Find the molecular formula for each of the following compounds: (6 points) a) 30.5% nitrogen; 69.5% oxygen; molar mass of 46 g/mol NO2 N2O4 N3O6 N5O10 N7O14 b) 2.67 g of carbon; 0.22 g of hydrogen; 7.11 g of oxygen; molar mass of 90 g/mol Hint: Start by calculating the empirical formula. 3. A gas sample of 17.0 g is constituted of 15.8 g of carbon, the rest being hydrogen. Given that the sample?s volume is 4.9 L at NTP conditions, calculate the molecular formula for this compound.(5 points) 4. A compound is constituted by mass of 22.6% phosphorus, the rest being chlorine. Given that a volume of 307 mL of the gas has a mass of 1.55 g at 25 ?°C and 90 kPa, find the molecular formula for this compound. (5 points) 5. A compound is constituted by mass of 52.1% carbon and 13.1% hydrogen, the rest being oxygen. Given that a volume of 5.33 L of this gas has a mass of 11.5 g at 13 ?°C and 110 kPa, find the molecular formula for this compound. (5 points)
How are standard solutions and titrations are prepared in industry?
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Determine about the Line and Surface Imperfection Line imperfection: Displacement with a curved boundary produces a mixed dislocation line at the boundary. Surface Imp
Two reactions have identical value of Ea. Does it the mean that they have same rate constant if run at the same temperature?Illustrate.
Physical properties of Nitro alkanes or Nitroparaffins (1) Nitro alkanes are colourless, pleasant smelling liquids. (2) These are sparingly soluble in water but enthusiastic
When a result of barium nitrate and a solution of copper(II) sulphate are mixed a chemical reaction produces solid barium sulphate which sinks to the bottom and a solution of coppe
In how many chlorines does Slicon bound The sito four chlorines, and is thus tetrahedral. The Cl-Si-Cl bond angle is 109.5°.
Each element has a unique number of protons. This unique number is known as the element's atomic number . All atoms of a given element have the same atomic number. For example:
I need organic chemistry exams in pdf form Project Description: Hi, i need someone to get 100 unique organic chemistry exams from US universities and colleges. The needs f
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