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A 12.0-L sample of a gas within a cylinder has a pressure of 2.0 atm. Determine the new pressure (in atm) when the volume of the cylinder decreases to 8.0-L.
A first order reaction is 30 percent completed in 35 minute what is the value of the rate constant?
b) whay percent of the reactant will remain after 5 hours?
A 0.835 sample of hydrated calcium nitrate was heated carefully it has changed completely to the anhydrous form. After heating, the sample mass was recorded as 0.580g. Determine the value of x(must be a whole number)
2) A 45.7 g sample of glass was brought to thermal equilibrium with boiling water and then transferred to 250.0 g of water that was at 22.5 °C. This combination reached thermal equilibrium at 24.2 °C. What is the specific heat capacity of glass?
how many moles of Na are needed to react with 21.4 kJ of heat.
Draw a dot and cross diagram showing outer electrons only to show the formation of carbon disulfide, CS2 from carbon and sulphur atoms
How many atoms are in 1.0 moles of aluminum?
- The boiling point of an aqueous solution containing a non-volatile electrolyte is 100.75 degrees C.
- What is the boiling point elevation?
- What is the molality of the solution?
In the biochemistry laboratory, one patient's serum was found to contain 6.4 mg / mL of sodium in the form of ions. How do you comment on that level if it is known that the physiological limits for sodium ion are from 137 to 145 mmol / L?
What is the concentration (in mol / dm3) of KCl in the solution formed by mixing 25 mL of KCl solution, 0.100 M concentration with 50 mL of KCl solution, 0.100 M concentration?
