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Calculate the volume of ~2.5 M NaOH solution needed to prepare 200 mL (2 significant figures) of a ~0.040 M NaOH solution.
Calculate the mass of solid sodium hydroxide needed to prepare 200 mL of a 0.040 M solution. If one pellet of sodium hydroxide weighs 0.170 g, how many pellets should be dissolved?
Write a balanced equation for the neutralization of potassium hydrogen phthalate (C8H5O4K) with sodium hydroxide. Calculate the mass of potassium hydrogen phthalate that neutralizes 15 mL of an ~0.040 M NaOH solution.
Draw a structural representation of KHP that shows all atoms.
A zero-order reaction has a constant rate of 2.00×10-4 . If after 50.0 seconds the concentration has dropped to 6.00×10-2 , what was the initial concentration?
When runners or other athletes practice at high altitudes pressure is reduced. What then will be the effect on the [O2] in their blood? Why does this produce a lightheaded feeling?
A 2.89 g sample of solid calcium carbide (CaC2) reacted with water to produce acetylene gas (C2H2) and aqueous calcium hydroxide.
M HNO3 is mixed with 439 mL NaOH with pH=13.97. What is the pH of the resulting solution?
A solution of 2.40 grams of the unknown hydrocarbon dissolved in 26.7 grams of naphthalene is found to freeze initialy at 76.2 Degree Celsius. Caluculate the apparent milar mass of the unknown hydrocarbon on the basis of the freezing-point depress..
A mixture of 82.49 g of aluminum (MM = 26.98 g/mol) and 117.65 g of oxygen (MM = 32.00 g/mol) is allowed to react. Identify the limiting reactant and determine the mass of the excess reactant present in the vessel when the reaction is complete.
What mass of this substance must evaporate in order to freeze 150g of water initially at 15C? (The heat of fusion of water is 334J/g the specific heat of water is 4.18J/g*K.)
what is the pH of a buffered sysem made by dissolving 17.42 g of KH2PO4 and 20.41 g of K2HPO4 in water to give a volume of 200.0 mL
A mixture of 82.49 g of aluminum ( Picture = 26.98 g/mol) and 117.65 g of oxygen ( Picture = 32.00 g/mol) is allowed to react. Identify the limiting reactant and determine the mass of the excess reactant present in the vessel when the reaction is ..
An organic compound has a molecular weight of 176.12 amu and was found to contain only three elements, C, H and O. When a 1.0000 g sample was completely combusted in air
A total of sixteen grams of steam at the temperature of 120 degree Celsius is admitted to the system. Determine the phase composition and temperature at the time when equilibrium is reestablished?
If 12.5 g of CCl3F is enclosed in a 1.1 -,L container, will any liquid be present? What is the mass of the liquid?
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