The quantity of antimony in a sample can be determined by an oxidation–reduction titration with an oxidizing agent. a 6.47 g sample of stibnite, an ore of antimony, is dissolved in hot, concentrated hcl ( aq ) and passed over a reducing agent so that all the antimony is in the form sb 3 ( aq ) . the sb 3 ( aq ) is completely oxidized by 33.4 ml of a 0.110 m aqueous solution of kbro 3 ( aq ) . the unbalanced equation for the reaction is bro − 3 ( aq ) sb 3 ( aq ) ⟶ br − ( aq ) sb 5 ( aq ) (unbalanced) calculate the amount of antimony in the sample and its percentage in the ore.

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two

Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.

Apiece of metal 75g at 110°c is dropped in a container with 500g at 20°c. the h2o if temperature is 24°c find specific heat capacity of metal