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A graduated cylinder is filled to the 40.00-mL mark with a mineral oil. The masses of the cylinder before and after the addition of the mineral oil are 124.966g and 159.446g, respectively. In a separate experiment, a metal ball bearing of mass 18.748g is placed in the cylinder and the cylinder is again filled to the 40.00-mL mark with the mineral oil. The combined mass of the ball bearing and mineral oil is 50.952g. Calculate the density and radius of the ball bearing. (Volume of sphere of radius r is 4/3pir3)
calculate the number of moles in 75.0g of lead(II) perchlorate trihydrate, Pb(ClO4)2 * 3H2O
Which transisiton metal is valued for its high electrical conductivity and resistance to corrosion, and is widely used for plumbing? a) iron b) manganese c) magnesium d) cobalt e) copper
What is the heat change in J associated with 65 g of gaseous acetic acid at 127 oC changing to solid at -50 oC? c(acetic acid) (g) = 1.11 J/(g.K) c(acetic acid) (liq) = 2.18 J/(g.K) c(acetic acid) (s) = 1.32 J/ (g.K) ?Hfus(acetic acid) = 192 J/g ?..
Consider writing all the possible structural isomers for C7H16. These would fall into which class(es) listed below. Straight chain, branched chain, stereoisomers, cyclic, geometric
a rolling axle 1.50 m long is pushed along horizontal rails at a constant speed v3.00 ms. a resistor r0.400omega is
If you have 100 ml of pure water and add to it 100 ml of 2.0M HC2H3O2. What will be the final solution pH
If you consider an orange LED and create a set of energy levels (i.e. the energy level diagram of a semiconductor) that is consistent with the observed spectrum of the diode,
What are the conductance cell and the cell constant. Describe experimental method for the determination of the cell constant.
How many moles is a cube of gold with sides of 2.364 cm? Density of gold is 19.30 g/mL What is the atomic mass of gold?what is the name of the commom laboratory equipment.
How many grams of water can be cooled from 54.7 ? to 43.1? by the evaporation of 19.7 g of water? The heat of vaporization of water in this temperature range is 2.40 kJ/g
a gas mixture contains helium and oxygen at partial pressures of 255 torr and 0.450 atm. what is the total pressure in
Work out the solubility of copper(II)sulfide. Take it that 1 litre of the mixture weighs 1 kg. (in g/100g), CuS (s) Cu^2+ (aq) + S^2- (aq)
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