Mohamad

pls explain your answer Which of the following solutions would be expected to be the best conductor of an electric current at room temperature? a. 1.0 M CH3COOH b. 0.10 M CH3COOH c. 0.10 M CO(NH2)2 d. 0.10 M Na2SO4 e. 0.10 M NaCl thanks

The hydrogen-ion concentration of a 0.25 M solution of HCN (Ka = 4.9 ´ 10-10) is I keep getting 1.1 *10^-5

A skateboard wheel has a radius of 2.08 inches and is turning at a rate of 945 rpm. a. what is the angular speed in radians per second? in degrees per second? b. how fast is the skateboard traveling (in miles per hour)?

first:- X=X1+0.5(Vx+V1x)t 140=0+0.5(20)t t=14s second:- a=v/t=20/14=1.43m/s2 F=m*a=1000*1.43=1430N to the south

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A phone company offers two monthly plans. Plan A costs 18 plus an additional 0.08 for each minute of calls. Plan B has no initial fee but costs 0.12 for each minute of calls.