- How many mL of 2.50 M HNO3 are needed to prepare a 75.0 mL of 1.00 M HNO3?

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What is the volume in mL of 0.887 kg of mercury? (Density of mercury is 13.56 g/cm3)? How many grams of zinc make 9.65g of zinc hydroxide? An object is 0.89 kg and its volume is 0.159 L. What is the density in kg/m3 of this object? Determine the root-mean-square speed of methane (CH4) molecules that have an average kinetic energy of 10.5 J/mol.? A rock is thrown off a 75 m tall cliff with a 5 m/s velocity in the x direction and 2 m/s velocity downwards. how far does the rock travel?