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Calculate the mass of limestone(CaCO3) that must be decomposed to produce 75.5g of limestone(CaO)
How much dry solute would you take to prepare each of the following solutions from the dry solute and the solvent
What is the specific heat capacity of a liquid if 450.0 kJ of heat caused 230.0 g of the liquid if temperature changed from 25°C to 28°C and state the reaction exothermic or endothermic
Which value is closest to the pOH of a 0.30M solution of the weak base methylamine (CH_3_NH_2_). The Ka for the acid form of methylamine (CH_3_NH_3_+) is 2.27E-11.
Calculate the Root Mean Square Speed and its average kinetic energy per molecule of Nitrogen and water vapor
C6H6 gas is burned in the presence of excess oxygen. What volume of liquid water could be condensed from combustion of 12.0 moles of Benzene (C6H6)? Assume density of water 1.0 g/mol.
If KHP(aq) + NaOH(aq) --> KNaP(aq) + HOH(l) (KHP is potassium hydrogen phthalate - not phosphorus), how many moles of NaOH are needed to completely react with 0.03 moles of KHP? moles of NaOH
when light of frequency 5.26times1015 s-1 shines on the surface of a metal electrons are ejected with a maximum kinetic
liquid nitrogen has a density of 0.808gml at 77 k. a sample of 2.5 l of liquid nitrogen is allowed to evaporate at
Determine at what minimum angle relative to the centerline perpendicular to the doorway can someone outside the room hear no sound?
A 5.0 g sample of greenish-yellow Cl2 gas is added to a 10.0 g sample of gray potassium metal to form a white solid in a sealed container. Write a balanced equation for the combination reaction that should occur.
A sample of hard water has 1.5g Ca+2 in every 500mL of water. Calculate the molality an ppm Ca+2 in this sample.
The OH- concentration in a 2.5×10-3 M Ba(OH)2 solution is A) 4.0 × 10-12 M. D) 1.2 × 10-2 M. B) 2.5 × 10-3 M. E) 0.025 M. C) 5.0 × 10-3 M.
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