Iwill rate brainliest! need
barium hydroxide (ba(oh)2) and sulfuric acid (h2so4) react to produce water and barium sulfate (baso4). write and balance the equation.

(oh)2 + h2so4 2h2o + baso4

2baoh + h2so4 h2o + ba2so4

baoh + h2so4 2oh + baso4

2ba(oh)2 + h2so4 h2o + ba2so4

i think it is the first one but i am

This element exists in adundance in the sun.explain how you would go about capturing sunlight.would this captured sunlight contain any of the element?

High-pressure liquid chromatography (hplc) is a method used in chemistry and biochemistry to purify chemical substances. the pressures used in this procedure range from around 500 kilopascals (500,000 pa) to about 60,000 kpa (60,000,000 pa). it is often convenient to know the pressure in torr. if an hplc procedure is running at a pressure of 1.03×108 pa , what is its running pressure in torr?

6) (a) calculate the absorbance of the solution if its concentration is 0.0278 m and its molar extinction coefficient is 35.9 l/(mol cm). the depth of the cell is 5 mm. (b) what is the %t? (7) calculate the absorbance of the solution if the transmitted light intensity is 70% of the initial light beam intensity