Calculate the number of mole of NaOH needed to prepare 250 mL 0.30 M NaOH solution. (Relative Atomic Mass: Na = 23.0; H = 1.0; O = 16.0] A)75.00 mol

B)0.833 mol

C)1.200 mol

D) 0.075 mol

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.