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Use the ideal gas laws to calculate the mass of 25 m3 of a mixture of 21% v/v oxygen (O2) and 79% nitrogen (N2) which is at a temperature of 65°C and pressure of 2 bar.
A 200 mL volume of 0.317 M K3PO4 is condensed to a volume of 0.0500 L, calculate the molarity (M) of K3PO4 in the new solution.
The pH of a 0.500 solution of an aqueous weak acid (HA) is 2.30. Calculate the Ka for the weak acid.
A lump of copper is heated with 225 J of energy. Its temperature rises by 11.5 oC. How many grams does this lump weigh
Question- Draw the Lewis structures of Me and Pr. What is the expected C-O-H bond angle? Comment of the feasibility of complex formation if the C-O-H bond angle was 180 degrees.
Arsenic poisoning has been recognized since ancient times. Recognize the two enzymes that are inactivated by arsenic as well as show how the toxin works.
The source is used in a double slit interference experiment where the slit spacing is a 0.040 mm, and the distance between the double slits and the screen is 1.2 m. What is the separation between the second- order bright fringes of the two wavelen..
The process is mechanically irreversible, requiring 20% more work than the mechanically reversible compression and the sorroundings consist of a heat reservoir at 27 degrees C?
The specific heat of water is 4.18 J/(g·oC). Calculate the molar heat capacity of water?
How do you calculate the pH of a solution given the concentration of OH- ions?
At what allele frequency is the frequency of heterozygotes maximized?
A flask containing 36.8 mL of 0.138 M sodium acetate (NaC2H3O2) is titrated with 24.9 mL of 0.128 M HNO3. Calculate the pH of the solution. pKa for acetic acid = 4.757.
Explain what health risks may arise people use this hot water in the preparation and cooking and what is the equilibrium constant for this reaction
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