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A 280ml flask contains pure helium at a pressure of 754 torr . A second flask with a volume of 475ml contains pure argon at a pressure of 732 torr . If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of helium? What is the partial pressure of argon?
Write a balanced nuclear equation for the alpha decay of each of the following radioactive isotopes.
Calculate the energy of attraction (in eV) between a cation with a valence of +2 and an anion with a valence of -3,
Calculate the number of 5.70m NaOH must be added to 666 ml of a buffer that contains .0205m C2H4O2 and .0260m C2H3NaO2 to increase the ph to 5.75.
Compute the mass of air in an air-filled tire and the also determine the mass of He in a helium-filled tire
Blood is essentially an aqueous solution but it must transport a variety of non polar substances hormones for example
Ionization energy is the energy required to remove an electron from an atom in the gas phase. The ionization energy of lead is 715.0 kJ/mol.
A 184-mg sample of Na2CO3 is dissolved in H2O to give 3.00L of solution. What is the concentration of Na+ in parts per million (ppm)?
If 13.0g of CCl3F is enclosed in a 1.2-L container, what mass of liquid will be present, when the vapor pressure of CCl3F at 300K is 856 torr?
How many kilojoules of energy are required to heat 50.0 g of ethanol from -20.0°C to 68.0°C?
What is the mass, and the volume, of this seawater that contains 1.00 g of oxygen?
Calculate the theoretical yield of C2H5Cl when 124 g of C2H6 reacts with 219 g of Cl2 , assuming that C2H6 and Cl2 react only to form C2H6Cl and HCl.
A 155 mL sample of rainwater is titrated using 0.0095 M NaOH solution. If 4.8 mL of the NaOH solution was required to reach the endpoint, what was the pH of the rainwater?
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