Determine the ph at the equivalence (stoichiometric) point in the titration of 40 ml of 0.16 m formic acid(aq) with 0.2 m naoh(aq). the ka of formic acid is 1.8 x 10-4.

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.

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2