
Derive the mass of anhydrous BaCl_2(s) that should result when 1.5 g of BaCl_2-2H_2O is thermally...
KClO3 (122.6 g mol^-1) decomposes when exposed to heat via the reaction 2KClO3(s)-->2KCl(s) + 3O2(g). What mass of KClO3 was decomposed is 140.0 mL of O2 (32.00 g mol^-1) was collected at STP?
11. NaHCO, decomposes when exposed to heat: 2 NaHCO3(s) → Na2CO3(s) + CO2(g) + H2O(e) AH = 91.5 kJ What mass of NaHCO3 is decomposed by 256 kJ?!
Pellets of mass 1.5 g are fired in parallel paths with speeds of 110 m/s through a hole 3.5 mm in diameter.How far from the hole must you be to detect a 1.0-cm-diameter spread in the beam of pellets?
A soccer ball of mass 0.36 kg is rolling with velocity <0, 0, 1.5> m/s, when you kick it. Your kick delivers an impulse of magnitude 2.7 N.s in the -x direction. The net force on the rolling ball, due to the air and the grass, is 0.34 N in the direction opposite to the direction of the ball's time 1.5 s after you kick it, assuming that the ball is at the origin at the moment it is kicked....
What is the mass of aluminum metal that reacts to give 1.5 g of hydrogen gas? 2 Al(s)+6 HCl(aq)2 AICI3(aq) + 3 H2(g)
Approximately what mass of NH4Cl(s) should you dissolve in the
water to achieve this result? The heat of solution of NH4Cl is
+14.7kJ/mol NH4Cl. Assume that the density of the dilute solution
is the same as that of water.
Express your answer to two significant figures and include the
appropriate units.
Constants 1 Periodic Table You are planning a lecture demonstration to illustrate an endothermic process. You want to lower the temperature of 1200 mL water in an insulated container...
6. A wire has a mass of 4.6 g and a length of 1.5 m is fixed at both ends and has a tension of 893 N. (a) What is the speed (in m/s) of transverse waves on the wire. (b) Determine the wavelength (in m) and frequency (in Hz) of the fundamental. (c) What are the frequencies of the second in Hz) and fifth harmonics (in Hz).
The coefficients of friction between a block of mass 1.5 kg and a surface are ?s = 0.60 and ?k = 0.40. Assume the only other force acting on the block is that due to gravity. What is the magnitude of the frictional force (in newtons) on the block if the block is at rest and the surface is inclined at 15o? Use g = 9.79 m/s2.
2NaN3(s) → 2Na(s) + 3N2(g) is the initial reaction in an auto airbag. How many grams of N2 result when 105 grams of NaN3 react?
A metal bar of mass 500 g slides outward at a constant speed of 1.5 cm/s over two parallel rails separated by a distance of 30 cm which are part of a U-shaped conductor. There is a uniform magnetic field of magnitude 2 T pointing out of the page over the entire area. The railings and metal bar have an equivalent resistance of 150Ω.150Ω. (a) Determine the induced current, both magnitude and direction. (b) Find the direction of the induced...