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A 25.0 L tank contains 2.0 kg of neon gas with a pressure of 98.0 atm at 25°C. How many kilograms of 0₂ can fill the tank under the same pressure and temperature?
A 9.75 g sample of a compound contains 3.11of potassium, K, 2.82g of chlorine, Cl, and oxygen, O. Calculate the empirical formula.
Insert subscripts as needed.
What is the empirical formula for a compound composed of 0.1417 mol of carbon (C), 0.0708 mol of hydrogen (H), and 0.0354 mol of nitrogen (N)?
A sample of aluminum foil contains 7.80×1023 atoms. What is the mass of the foil?
How many total atoms are in 0.510 g of P2O5?
Create a function that takes the number of wins, draws and losses and calculates the number of points a football team has obtained so far.
The function f(x)= [x]- x is not integrable in [ 0,3] , where [ x] denote greatest integer function.
True or false with full explanation
The source of bitterness in dark chocolate is the compound theobromine, an alkaloid present in cocoa beans. In a sample of dark chocolate there are 6.42×10^20 molecules of theobromine present.
How many milligrams of theobromine are present in the sample? The molecular formula for theobromine is C7H8N4O2
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A beaker contains 45.5 mL of carbon tetrachloride (CCl4, density is 1.59 g/mL).
Determine how many molecules of carbon tetrachloride are in the beaker.
A solution is made of
- 1 mmol of non-volatile solute A
- 2 mmol of non-volatile solute B
- 3 mmol of non-volatile solute C
- 4 mmol of non-volatile solute D
- 0.990 mol of solvent.
Assume that the solvent is water, what is the vapor pressure of this solution at the normal boiling point of water?
#339914 on Dec 2023