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.

Pl asaaap ! match the term to the correct description. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. movement that is like a t transfers energy from one location to another 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit